• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Telescope comprising a mounting plate (1), a primary mirror (100) carried by a front face (2) of the plate, and a secondary mirror (200) held facing the primary mirror by a support (300), characterized in the support (300) comprises a primary ring (310) mounted around the primary mirror (100), a secondary ring (320) mounted around the secondary mirror (200), arms (350) connecting the secondary ring to the ring primary, and mechanical decoupling means of the secondary mirror (200) vis-à-vis the primary mirror (100).
    公开号:FR3070503A1
    申请号:FR1700869
    申请日:2017-08-22
    公开日:2019-03-01
    发明作者:Charlotte Hoeltzel；Cedric Tacconi；Christophe Furui；Franck Seillier；Guillaume Anna
    申请人:Safran Electronics and Defense SAS；
    IPC主号:
    专利说明:

    The present invention relates to the field of optics and more particularly a telescope usable for observation and aiming.
    STATE OF THE ART
    A telescope comprises a frame carrying a primary mirror and a secondary mirror held facing the primary mirror by a support such that the primary mirror returns the light flux to the secondary mirror which in turn returns it to an eyepiece. The frame comprises a plate for fixing the primary mirror so as to maintain in position, relative to the eyepiece, the primary mirror, support, secondary mirror assembly without generating mechanical stresses on the primary mirror.
    There are many types of telescope, including Newtonian telescopes and Cassegrain telescopes. In Cassegrain and related telescopes (Schmidt Cassegrain, Maksutov Cassegrain), the primary mirror is pierced in its center to allow the light flux returned by the secondary mirror to pass through an eyepiece placed behind the primary mirror.
    In telescopes used in on-board observation and sighting systems on vehicles, the eyepiece is replaced by a sensor connected to a display device mounted in the vehicle's driving position.
    The quality of the telescope depends on the relative positioning of the mirrors and the deformations undergone by the mirrors.
    Vibrations and differential expansions help to limit the performance of such telescopes.
    OBJECT OF THE INVENTION
    An object of the invention is to improve the performance of these telescopes.
    BRIEF STATEMENT OF THE INVENTION
    To this end, a telescope is provided comprising a fixing plate, a primary mirror carried by a front face of the plate, and a secondary mirror held facing the primary mirror by a support.
    According to a first characteristic of the invention, the support comprises a primary crown mounted around the primary mirror, a secondary crown mounted around the secondary mirror, and arms connecting the secondary crown to the primary crown and the support comprises a mechanical decoupling means of the secondary mirror vis-à-vis the primary mirror.
    The presence of a mechanical decoupling means such as the arrangement of the secondary crown of the support makes it possible to limit the transmission of vibrations to the secondary mirror, which significantly improves the performance of the telescope, in particular when it is on board a vehicle.
    Preferably, the secondary ring comprises an external ring and an internal ring coaxial with the external ring and connected to the latter by symmetrically distributed mechanical decoupling elements.
    This mode of mechanical decoupling is particularly simple.
    Advantageously then, the secondary mirror is received with play in the internal crown and is glued therein by means of a structural adhesive; the outer ring comprising first through bores and the inner ring comprising second through bores substantially aligned with the first bores to allow the introduction of a glue injection cannula.
    This arrangement of the holes makes it easier to introduce the adhesive between the secondary mirror and the internal crown.
    Advantageously also, the first holes are made in the vicinity of the arms.
    The outer ring has a greater thickness at this point to make the holes.
    According to a second characteristic of the invention, the primary mirror is connected to the plate by fixing elements each having a base fixed to the plate and, opposite the base, a bearing which is housed between a first rear portion and a second rear portion of the primary mirror and which receives a third section of an axis having a first section and a second section received respectively in a first bore and a second bore which are formed in the first rear portion and the second rear portion respectively . The third section is received in the bearing with a sliding adjustment and is glued in the bearing by means of a structural adhesive and the axis is provided with a central channel having a first end opening onto a part of the axis accessible when the axis is in position in the bores to receive one end of a glue injection cannula and a second end opening into at least one transverse channel, at least one end of which opens onto an external surface of the third section.
    The quantity of adhesive being limited, the influence of a dilation of this under the effect of thermal variation is weak so that the adhesive does not generate on the primary mirror a sufficient stress to cause a deformation of the primary mirror .
    According to a third characteristic of the invention, the support comprises a primary crown mounted around the primary mirror, a secondary crown mounted around the secondary mirror, and arms connecting the secondary crown to the primary crown. Alternatively or cumulatively:
    - The arms have a first end adjacent to the primary crown and a second end adjacent to the secondary crown, the first end extending radially with respect to the primary crown and the second end extending tangentially with respect to the secondary crown;
    the arms are curved towards the primary mirror;
    each arm has a cross section which varies between the ends so that, for a given force generating stresses in the arm, the stresses are distributed equally along the arm.
    The arms then make it possible to maintain the secondary mirror in position relative to the primary mirror, by limiting, thanks to at least one of the arrangements indicated above, on the one hand, the transmission of vibrations to the secondary mirror and, on the other hand, to limit the area of the primary mirror which is masked by the arms vis-à-vis an incident light flux.
    According to a fourth characteristic of the invention, the telescope is of the Cassegrain type and the stage has a rear surface comprising positioning references of the telescope with respect to an image capture device arranged facing the rear face.
    Advantageously then, the positioning references are obtained by optical quality machining and comprise a face perpendicular to an optical axis of the telescope to form a tilt reference, a central bore to form a centering reference and concave machining in a spherical cap. having a center on the optical axis to define a distance of the sensor from the secondary mirror.
    Advantageously also, the secondary mirror comprises, opposite the primary mirror, a central portion provided with at least one centering engraving of the secondary mirror relative to the primary mirror.
    This facilitates the positioning of the image capture device relative to the telescope and the positioning of the secondary mirror relative to the primary mirror.
    Other characteristics and advantages of the invention will emerge on reading the following description of particular non-limiting embodiments of the invention.
    BRIEF DESCRIPTION OF THE FIGURES
    Reference will be made to the appended drawings, among which:
    - Figure 1 is a schematic view of a telescope according to the invention;
    - Figure 2 is a perspective view of the support alone from a first angle of view;
    - Figure 3 is an enlarged view of a central area of Figure 2;
    - Figure 4 is a perspective view of the support of the secondary mirror from a second angle of view;
    - Figure 5 is a perspective view of this support from a third angle of view;
    - Figure 6 is a perspective view of the secondary mirror alone;
    - Figure 7 is a partial sectional view along the plane VII of Figure 1;
    - Figure 8 is a detail view of Figure 7;
    - Figure 9 is a perspective view of the primary mirror alone;
    - Figure 10 is a view of a fixing element of the primary mirror on the plate;
    - Figures 11 to 13 are partial perspective and sectional views showing the mounting of the primary mirror on the plate.
    DETAILED DESCRIPTION OF THE INVENTION
    The invention is described here in application with a Maksutov Cassegrain type telescope.
    With reference to the figures, the telescope according to the invention comprises:
    - a primary mirror,
    - a secondary mirror,
    - a support holding the secondary mirror and the primary mirror one opposite the other.
    The primary mirror, the secondary mirror and the support respectively bear the general references 100, 200, 300 in the figures.
    The primary mirror 100 comprises a body of revolution 101 having a central axis on which a reflecting surface 102 is centered, a reference face 103 opposite a peripheral surface 105 reflecting central bore 102 and the reflecting surface 102,
    104 of shape emerging from the reflecting surface face
    102 has a cylindrical, and one on the surface shape reference
    103. The concave aspheric cap.
    The reference face 103 comprises several, here two grooves 106, 107, of circular shape and of rectangular cross section, which are centered on the central axis and which delimit an external annular portion 108, an intermediate annular portion 109 and a portion internal ring 110.
    The groove 106 is closer to the central axis than the groove 107. The grooves 106, 107 make it possible to lighten the primary mirror 100 while the portions 108, 109, 110 form ribs for stiffening the reflecting surface 102.
    The secondary mirror 200 comprises a body of revolution 201 having a central axis on which are centered a surface opposite the peripheral surface
    204 of reflective 202, a reflective face 203 202, and a cylindrical surface. The reflecting surface 202 has a shape of a convex aspherical cap which faces the reflecting surface 102 of the primary mirror 100. The central axis of the secondary mirror
    200 is aligned with the central axis of the primary mirror 100 to define the optical axis A of the telescope.
    The primary mirror 100, the secondary mirror 200 and the support 300 are here made of aluminum.
    The primary mirror 100 is mounted on a fixing plate, generally designated at 1, on which the support 300 is fixed.
    The support 300 comprises a primary crown 310 mounted on the fixing plate 1 to extend around the primary mirror 100, a secondary crown 320 mounted around the secondary mirror 200, and arms 350 connecting the secondary crown 320 to the primary crown 310 The support 300 is here in one piece.
    The primary crown 310 extends around the primary mirror 1 without touching it and includes an edge 313 enclosing the fixing plate 1 to ensure its fixing to the fixing plate 1. The primary crown 310 is here fixed to the fixing plate 1 by gluing with a structural glue here an epoxy glue. In contrast, the primary crown 310 has an edge 311 projecting from the primary mirror 100 on the side of the secondary mirror 200 and the edge 311 is provided with notches 312 making it possible to limit as much as possible the portion of the primary crown 310 which projects from the primary mirror 100 and which risks intercepting a secondary luminous flux directed towards the primary mirror 100.
    The arms 350 have a first end 351 connecting to the primary crown 310 substantially radially and a second end 352 connecting to the secondary crown 320 substantially tangentially. The arms 350 are arranged in three pairs positioned at 120 ° from each other. The first ends 351 are integral with the internal surface 313 of the part of the primary crown 310 projecting from the reflective surface 102, at the level of the not indented portions. The arms 350 of each pair diverge from one another so that the second end 352 of each of the arms 350 of a pair almost comes to join the second end 352 of the adjacent arm 350 belonging to another pair of arms 350.
    The arms 350 are curved towards the primary mirror 100. Each arm 350 has a cross section which varies between the ends 351 and 352 in such a way that, for a given force generating stresses in the branch, the stresses are distributed in an equivalent manner. along the arm 350. The cross section here has a rectangular shape having a major axis parallel to the optical axis A.
    The arms 350 are thus arranged so as to:
    - have sufficient stiffness and resistance to stresses to limit the transmission of vibrational energy to the secondary mirror 200, have a reduced projected area for 350 on the primary mirror projected primary
    100 per
    100.
    the arms includes a secondary mirror mechanics 200
    The support
    300 limit
    The shadow on the mean mirror vis-à-vis decoupling of the primary mirror 100.
    The secondary ring 320 comprises an external ring 321 to which the second ends 352 of the arms 350 are connected and an internal ring 322 coaxial with the external ring 321 and connected to the latter by symmetrically distributed mechanical decoupling elements. The mechanical decoupling elements are here formed of three elastic blades 323 extending radially between the outer crown 321 and the inner crown 322. The elastic blades 323 are arranged at 120 ° so that each elastic blade 323 is positioned symmetrically between two pairs of arms 350. Each elastic blade 323 is arranged to be relatively rigid in a direction parallel to the optical axis A but relatively flexible in a circumferential direction of the secondary crown 200.
    The outer ring 321 comprises third through holes 331 and the inner ring 322 comprises des.guatrièmes through holes 332 which are substantially aligned with the holes 331. Each hole 331 and the hole 332 which is aligned with it form a pair of holes allowing introduction of a glue injection cannula C from the outside of the external crown 321. The bore 331 is arranged to guide the cannula towards the bore 332. Each bore 332 is stepped to form a stop for the insertion of the cannula in the hole 332 and is arranged to ensure a tight connection with the cannula C. To this end, the cannula
    C is of entry diameter conical shape and each hole 332 has a section having a diameter of the end of the slightly less than the withdrawal (1 or 2 mm) of its grip cannula C end slightly so in particular Figure 8 ). comprises
    331, 332 in such a way that:
    - each hole 331 has on the outside of the crown
    The support 300 has six pairs of holes, one outer end 321 opening out between the second ends 352 of a pair of arms 350 and one end opening out inside the outer ring 322 between two elastic blades 323;
    each bore 332 has one end opening out inside the outer ring 321 between two elastic blades 323 opposite the end of the corresponding hole 331 and one end opening out inside
    of the crown internal 322; the outlets for drilling 332 are symmetrically distributed at 1 ' interior of the crowned internal 322. The secondary mirror 200 is received in the
    internal crown 322 with a radial clearance of approximately 0.25 mm and is glued therein by means of a structural adhesive. The positioning of the pairs of holes 331, 332 allows a homogeneous distribution of the adhesive around the secondary mirror 200. The small clearance between the internal surface of the internal crown 322 and the peripheral surface 204 of the secondary mirror 200 allows, on the one hand, to adjust in position (inclination and coaxiality) the secondary mirror 200 relative to the axis of the primary mirror 100 and, on the other hand, to limit the thickness of adhesive extending between these two surfaces. Having a relatively small thickness makes it possible to limit the stresses that the adhesive can exert on the secondary mirror 200 due to a thermal variation. The adhesive used here is an epoxy adhesive and, for example, that of the 3M brand bearing the reference DP490. It will be noted that the external crown 321 comprises an internal surface provided with an annular recess 324 so as not to interfere with the secondary mirror 200 during operations for adjusting the position of said secondary mirror 200.
    The plate 1 has a form of revolution around a central axis collinear with the optical axis of the telescope and comprises a front face 2 facing the fixing face 103 of the primary mirror 100 and, opposite the latter, a rear surface bearing the general reference 3 in FIG. 1.
    The front face 2 is provided with a groove 4 of circular shape centered on the central axis of the fixing plate 1. The groove 4 has a flat bottom on which are fixed fixing elements 10 each having a base 11 resting on flat on the bottom of the groove 4 and, opposite the base 11, a bearing 12 which projects projecting from the front face 2. The bearing 12 is connected to the base 11 by two rods 13 arranged in a triangle with the base 11. The rods 13 are in one piece with the bearing 12 and the base 11.
    The fastening elements 10 are three in number arranged at 120 ° from each other symmetrically with respect to the central axis.
    The bearing 12 of each fixing element 10 is housed in the groove 107 between the external annular portion 108 and the intermediate annular portion 109.
    Each bearing 12 receives a third section 23 of an axis, generally designated at 20 in the figures, having a first section 21 and a second section 22 received respectively in a first bore 38 and a second bore 39 which are formed in the annular portion external 108 and the intermediate annular portion 109. The holes 38 and 39 open out.
    The second section 22 has a diameter less than the third section 23 and is connected to the latter by a shoulder forming a stop for the insertion of the second section 22 into the second bore 39. The first section 21 has a diameter greater than the third section
    23.
    The first section 21 and the second section 22 are bonded respectively in the first hole 38 and the second hole 39 by means of an anaerobic structural adhesive. The glue used is more particularly that of the LOCTITE brand bearing the reference 638. It is advantageous that the smallest possible space is left between the external surface of the sections 21 and 22 on the one hand and the internal surface of the holes 38, 39 The smallest possible space must be sufficient to allow the relative sliding of the two surfaces before bonding and admit a quantity of glue just sufficient to fix the two surfaces to each other taking into account the forces to be supported. The fluidity of the glue influences the dimensioning of this space since the more fluid the glue, the more the space can be thin. It is understood that an attempt is made to minimize this thickness and therefore the quantity of adhesive so that, in the event of a temperature variation, the adhesive does not generate on the primary mirror 100 stresses liable to deform it.
    The axis 20 is provided with a central channel 25 having: a first end opening on the end face 26 of the axis 20 forming a part of the axis 20 accessible when the axis 20 is in position in the holes 38, 39 to receive one end of a cannula
    C glue injection;
    a second end opening into at least one transverse channel 27, the two ends of which open at diametrically opposite points on an external surface of the third section 23.
    The third section 23 is received in the bearing 12 with a sliding adjustment. The sliding adjustment is here of type H7g6 but could be of type H7g5 or any other sliding adjustment leaving the smallest possible space between the external surface of the third section 23 and the internal surface of the bearing 12. The third section 23 is glued in the bearing 12 by means of a structural adhesive injected into the central channel 25 then the transverse channel 27 by means of the cannula C introduced into an inlet section of the central channel 25 opening onto the end face 26. The adhesive used is more particularly an epoxy structural adhesive and for example that of 3M brand bearing the reference DP490. The smallest possible space left between the external surface of the third section 23 and the internal surface of the bearing 12 must be sufficient to allow the relative sliding of the two surfaces before bonding and admit a quantity of glue just sufficient to fix the two surfaces l 'to each other taking into account the efforts to bear. The fluidity of the glue influences this space since the more fluid the glue, the more the space can be thin. It is understood that an attempt is made to minimize this thickness and therefore the quantity of adhesive so that, in the event of a temperature variation, the adhesive does not generate on the primary mirror 100 stresses liable to deform it.
    Each of the holes 39 opens out on the side of the annular groove 107 in a recess 40 formed in the intermediate annular portion 109 in order to avoid contact between the bearing 12 and a surface of the intermediate annular portion 109.
    It will be noted that the links 13 are arranged to ensure mechanical decoupling of the primary mirror 100 and of the fixing plate 1 so as to support the primary mirror 100 while limiting the creation of mechanical stresses in the primary mirror 100. To this end, the links 13 comprise parts of reduced thickness in a direction perpendicular to the optical axis and to their longitudinal axis so that the links are more rigid under forces parallel to the optical axis A than under forces perpendicular to the optical axis A and their longitudinal axis.
    The assembly of the mirrors 100 and 200, of the support 300 and of the plate 1 is carried out as follows.
    The base 11 of each fastening element 10 is firstly fixed to the plate 1 by means of screwed elements not visible in the figures. The mirror 100 is then fixed to the fixing elements 10. To do this, the bearings 12 are engaged in the groove 107 and each axis 20 is successively engaged in the bore 38, the bearing 12 and the bore 39 after the anaerobic structural adhesive was deposited on the first section 21 and the second section 22. The epoxy structural adhesive is then introduced between the internal surface of the bearing 12 and the external surface of the third section 23 via the central channel 25 then the transverse channel 27.
    The support 300 is then bonded to the plate 1 and then the secondary mirror 200 is bonded to the support 300 as indicated above.
    The rear surface 3 of the mounting plate 1 includes positioning references of the telescope with respect to an image capture assembly symbolized at 400 in FIG. 1 arranged opposite the rear face
    3. The image capture assembly 400 includes a sensor and possibly one or more lenses mounted in front of the sensor.
    Positioning references are obtained by optical quality machining and include:
    an annular face 51 centered on the optical axis of the telescope and perpendicular to the optical axis of the telescope to form a tilt reference,
    a central bore 52 to form a centering reference,
    a portion of concave surface 53 in a spherical cap having a center on the optical axis to define a distance from the sensor relative to the secondary mirror 200.
    The sensor is positioned parallel to the rear surface 3 and in such a way that the focal point defined by the concave surface portion 53 coincides with that of the sensor.
    In addition, the reflecting surface of the secondary mirror 200 comprises a central portion provided with at least one engraving 210 for centering the secondary mirror 200 relative to the primary mirror 100. The engraving 210 is in the form of a ring centered on an optical axis of the secondary mirror.
    The positioning of the secondary mirror 200 relative to the primary mirror 100 is adjusted, before bonding, by optical interferometry between the surfaces 202 and 102, by moving the secondary mirror 200 using micro-actuators.
    Of course, the invention is not limited to the embodiments described but encompasses any variant coming within the scope of the invention as defined by the claims.
    In particular, although all the components of the telescope are here made of aluminum to limit the differential expansions, it is possible to constitute the telescope with different materials but having homogeneous coefficients of expansion to limit the stresses on the components likely to cause a displacement relative to mirrors or a deformation thereof ...
    Alternatively, the axle can be mounted cantilevered from a single rear portion of the primary mirror.
    Although the telescope of the invention is extremely efficient when the four characteristics of the invention are combined as in the embodiment described, the four characteristics are independent of each other and it is possible to carry out the invention using the first characteristic alone or in combination with one or two others of the remaining characteristics.
    Although here the mechanical decoupling means of the secondary mirror 200 vis-à-vis the primary mirror 100 is provided only by the arrangement of the secondary crown 320 in two crowns 321, 322 connected to each other by elastic blades 323, additional means of mechanical decoupling are possible. In particular, a mechanical decoupling means, such as an elastic blade, could be interposed between each first end 351 of the arm 350 and the primary crown 310.
    The arms could have a shape other than that described and only have one or two of the following characteristics:
    - The arms have a first end adjacent to the primary crown and a second end adjacent to the secondary crown, the first end extending radially with respect to the primary crown and the second end extending tangentially with respect to the secondary crown;
    the arms are curved towards the primary mirror;
    each arm has a cross section which varies between the ends in such a way that, for a given force generating stresses in the arm, the stresses are distributed equally along the arm.
    The fixing of the primary mirror on the plate can be carried out differently. The fastening elements 10 can have a shape different from that described and the pins 20 can be smooth or be cantilevered. The number of fasteners 10 can be different from three.
    The primary crown can be fixed differently on the plate, for example glued.
    The transverse channel 27 may have only one end opening onto the external surface of the third
    section 23 and there can be several ; canals 5 transverse 27, for example three at 120 ° the each of theother. The face back of platinum can born notunderstand from re ferences of positioning or well aparty only of these. 10 The invention is applicable to other Types oftelescope and by example one telescope type Schmidt
    Cassegrain.
    权利要求:
    Claims (17)
    [1" id="c-fr-0001]
    1. Telescope comprising a fixing plate (1), a primary mirror (100) carried by a front face (2) of the plate, and a secondary mirror (200) held facing the primary mirror by a support (300), characterized in that the support (300) comprises a primary crown (310) mounted around the primary mirror (100), a secondary crown (320) mounted around the secondary mirror (200), arms (350) connecting the secondary crown to the primary crown * and a mechanical decoupling means of the secondary mirror (200) vis-à-vis the primary mirror (100).
    [2" id="c-fr-0002]
    2. Telescope according to claim 1, in which the secondary ring (320) comprises an external ring (321) and an internal ring (322) coaxial with the external ring and connected to the latter by mechanical decoupling elements (323) symmetrically distributed :.
    [3" id="c-fr-0003]
    3. Telescope according to. claim 2 * in which the: secondary mirror (200) is received with play in the internal crown (322) and is glued therein by means of a structural adhesive; the outer ring (321) comprising first through holes (331) and the inner ring comprising second through holes (332) 25 substantially aligned with the first holes to allow the introduction of an adhesive injection cannula.
    [4" id="c-fr-0004]
    4. The telescope according to claim 3, in which the second bore (332) is stepped to form
    30 a stop at the insertion of the cannula in the second bore and the second bore is arranged to allow a sealed connection with the cannula.
    [5" id="c-fr-0005]
    5. Telescope according to claim 3 or claim 4, wherein the first holes are 3.5 made in the vicinity of the arms.
    [6" id="c-fr-0006]
    6. Telescope according to any one of the preceding claims, in which the primary crown (310) has an edge (311) projecting from the primary mirror (100) on the side of the secondary mirror and the edge is provided with notches (312).
    [7" id="c-fr-0007]
    7. Telescope according to any one of the preceding claims, in which the primary mirror is connected to the plate by fixing elements (10) each having a base (11) fixed to the plate and, opposite the base. , a bearing (12) which is housed between a first rear portion (108) and a second rear portion (109) of the primary mirror and which receives a third section (23) of an axis (20) having a first section (21 ) and a second section (22) received respectively in a first bore (38) and a second bore (39) which are formed in the first rear portion and the second rear portion respectively; in that the third section is received in the bearing with a sliding fit and is glued into the bearing by means of a structural adhesive; and in that the axis is provided with a central channel (25) having a first end opening onto a part (26) of the axis accessible when the axis is in position in the bores to receive an end of a glue injection cannula and a second end opening into at least one transverse channel (27), at least one end of which opens onto an external surface of the third section.
    [8" id="c-fr-0008]
    8. Telescope according to claim 7, in which the second section (22) has a diameter smaller than the third section (23) and is connected to the latter by a shoulder forming a stop for the insertion of the second section into the second bore. (39).
    [9" id="c-fr-0009]
    9. The telescope according to claim 8, which the second bore (39) is through.
    in
    [10" id="c-fr-0010]
    10. The telescope according to claim 8, in which the first section (21) has a diameter greater than the third section (23). .
    [11" id="c-fr-0011]
    11. Telescope according to any one of claims 5 to 10, in which the second section (22) comprises a recess (40) opposite the bearing (12) to avoid one. contact between the bearing and the second section (109).
    [12" id="c-fr-0012]
    12. Telescope according to any one of
    10 claims 7 to 11, wherein the sliding adjustment is of type H7g6 or H7g5.
    13. Telescope according to 1 'a any of the claims 7 to 12, in which the first and second portions (108, 109) are separated one of 15 the other by a stretch a groove circular ( 107): centered on an optical axis of the telescope. 14. Telescope according to 1 'a any of the
    previous claims, in which the arms (350) have a first end (351) adjacent to the crown
    20 primary (310) and a second end (352) adjacent to the secondary crown (320), the first end extending substantially radially with respect to the primary crown and the second end substantially connecting tangentially to the secondary crown.
    15. Telescope according to any one of the preceding claims, in which the arms (350) are curved towards the primary mirror (100).
    16. Telescope according to any one of the preceding claims, in which each arm (350)
    30 has a cross section which varies between the ends (351, 352) in such a way that, for a given force generating stresses in the arm, the stresses are distributed equally along the arm.
    17. Telescope according to any one of
    35 previous claims, wherein; the arms (350) have a first end (351) adjacent to the primary crown (310) and a second end (352) adjacent to the secondary crown (320), the first end extending radially relative to the primary crown 5 and the second end extending tangentially with respect to the secondary crown; the arms are curved towards the primary mirror; and each arm has a cross section which varies between the ends such that, for a given force generating stresses in the arm, the stresses are distributed equally along the arm.
    18. Telescope according to any one of the preceding claims, in which the telescope is of the Cassegrain type and the stage (1) has a surface
    [13" id="c-fr-0013]
    15 rear (3) comprising positioning references of the telescope with respect to an image capture device (400) arranged opposite the rear face.
    [14" id="c-fr-0014]
    19. The telescope according to claim 18, in which the positioning references are obtained by
    [15" id="c-fr-0015]
    20 optical quality machining and comprise a face (51) perpendicular to an optical axis of the telescoped to form a tilt reference, a central bore (52) to form a centering reference and a concave surface (53) in a spherical cap having a center on
    25 the optical axis to define a distance of the image capture device (400) from the secondary mirror (200).
    .20. Telescope according to claim 18 or claim 19, in which the secondary mirror (200) 30 comprises, opposite the primary mirror (10.0), a central portion provided with at least one centering engraving of the secondary mirror relative to the primary mirror.
    [16" id="c-fr-0016]
    21. The telescope according to claim 20, in which the engraving is in the form of a ring centered on a
    35 optical axis of the secondary mirror (200).
    [17" id="c-fr-0017]
    22. Telescope according to any one of the preceding claims, in which the bearing (12) is connected to the base by two rods (13) arranged in a triangle with the base (11).
    23. The telescope according to claim 22, in which the rods (13) are in one piece with the bearing (12) and the base (11) and the rods are arranged to ensure mechanical decoupling of the primary mirror (100) and of the plate (1) so as to support the primary mirror while limiting the creation of mechanical stresses in the primary mirror.
    类似技术:
    公开号 | 公开日 | 专利标题
    CA3073490C|2021-08-24|Telescope with improved performance and simplified mounting
    CA3073478C|2021-03-16|Telescope with simplified mounting
    WO2013110785A1|2013-08-01|Device for attaching an optical member, attachment system and cryogenic device comprising such a device, method of manufacturing such a device and corresponding attachment method
    EP3044623A1|2016-07-20|Low-deformation telescope
    CA3073487C|2021-07-27|Telescope that is easier to mount and method for adjusting such a telescope
    EP1772759B1|2009-12-16|Variable focus lens barrel
    FR2605135A1|1988-04-15|Connector for two bodies of different thermal expansion
    FR3070501B1|2019-09-06|TELESCOPE WITH IMPROVED PERFORMANCES
    FR2760102A1|1998-08-28|ADJUSTABLE SELF-DIRECTING
    EP3044622A1|2016-07-20|Secondary mirror support for a telescope
    FR3072784B1|2019-11-15|TELESCOPE TYPE KORSH AMELIORE
    EP0130869A1|1985-01-09|Video imaging apparatus, particularly for self-steering devices
    CH328493A|1958-03-15|Device for increasing the depth of field of a lens
    FR2852697A1|2004-09-24|Infrared imaging device for home head type missile, has hollow tapered body with annular projection that defines support side rotating towards end of body, and two spherical mirrors constituting catadioptric optical unit
    EP2625557B1|2021-09-29|Optical head for atmospheric measurement, related systems and manufacturing methods
    EP1220003A1|2002-07-03|Optical architecture for observation telescope
    FR3099443A1|2021-02-05|OPTICAL DETECTION SYSTEM FOR MOTOR VEHICLES
    EP0209473A1|1987-01-21|Optical prosthesis to improve the vision of a person with a limited visual field
    FR2919933A1|2009-02-13|AMINCI MULTI-PUPIL OPTICAL DEVICE
    同族专利:
    公开号 | 公开日
    US20200233201A1|2020-07-23|
    CA3073490A1|2019-02-28|
    FR3070503B1|2020-05-22|
    ZA202001118B|2021-08-25|
    US10976517B2|2021-04-13|
    IL272648D0|2020-03-31|
    RU2728831C1|2020-07-31|
    EP3673313A1|2020-07-01|
    IL272648A|2020-11-30|
    EP3673313B1|2021-07-07|
    CN111033345A|2020-04-17|
    CA3073490C|2021-08-24|
    WO2019038302A1|2019-02-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20080290221A1|2004-12-28|2008-11-27|Thales|Support Device For Elements on a Piece of Space Equipment With Flexible Deploying Arms|
    US20130208367A1|2012-02-10|2013-08-15|Raytheon Company|Bi-polymer infrared optics for high-g applications|
    FR3010537A1|2013-09-12|2015-03-13|Sagem Defense Securite|TELESCOPE WITH LOW DEFORMATIONS|
    JP3058000B2|1994-02-28|2000-07-04|キヤノン株式会社|Mirror optics|
    FR2852697B1|2003-03-21|2005-06-03|COMPACT DEVICE FOR INFRARED MATRIX IMAGING|
    US7743576B2|2004-02-05|2010-06-29|S.A. Robotics|Deployable and retractable space frame|
    RU2541116C2|2013-02-06|2015-02-10|Федеральное государственное унитарное предприятие "Научно-производственное объединение им. С.А. Лавочкина"|Double-channel space telescope for simultaneous observation of earth and stars |
    FR3010536B1|2013-09-12|2016-12-23|Sagem Defense Securite|SUPPORT OF SECONDARY MIRROR FOR TELESCOPE|
    CN104898252B|2015-05-22|2017-07-14|中国科学院长春光学精密机械与物理研究所|The main secondary mirror supporting structure of aerial camera Cassegrain|
    JP6177487B1|2016-01-14|2017-08-09|オリンパス株式会社|Endoscope cover, endoscope, cover unit and endoscope unit|
    CN206057673U|2016-08-25|2017-03-29|云南云光发展有限公司|A kind of optical system for high power image-stabilizing binocular telescope|
    CN106646816A|2017-01-16|2017-05-10|中国科学院长春光学精密机械与物理研究所|High-precision bonding fixing device for spatial reflector|
    FR3070503B1|2017-08-22|2020-05-22|Safran Electronics & Defense|TELESCOPE WITH IMPROVED PERFORMANCE AND SIMPLIFIED MOUNTING|FR3070502B1|2017-08-22|2020-06-26|Safran Electronics & Defense|SIMPLIFIED MOUNTING TELESCOPE AND METHOD FOR ADJUSTING SUCH A TELESCOPE|
    FR3070503B1|2017-08-22|2020-05-22|Safran Electronics & Defense|TELESCOPE WITH IMPROVED PERFORMANCE AND SIMPLIFIED MOUNTING|
    CN110531531B|2019-09-27|2021-08-03|昆明北方红外技术股份有限公司|Method for assembling and adjusting primary and secondary reflectors of Cassegrain optical system|
    法律状态:
    2019-03-01| PLSC| Search report ready|Effective date: 20190301 |
    2019-07-22| PLFP| Fee payment|Year of fee payment: 3 |
    2020-07-21| PLFP| Fee payment|Year of fee payment: 4 |
    2021-07-22| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1700869A|FR3070503B1|2017-08-22|2017-08-22|TELESCOPE WITH IMPROVED PERFORMANCE AND SIMPLIFIED MOUNTING|
    FR1700869|2017-08-22|FR1700869A| FR3070503B1|2017-08-22|2017-08-22|TELESCOPE WITH IMPROVED PERFORMANCE AND SIMPLIFIED MOUNTING|
    CA3073490A| CA3073490C|2017-08-22|2018-08-21|Telescope with improved performance and simplified mounting|
    RU2020111076A| RU2728831C1|2017-08-22|2018-08-21|Improved telescope with simplified mounting|
    CN201880054039.8A| CN111033345A|2017-08-22|2018-08-21|Telescope with improved performance and simplified installation|
    PCT/EP2018/072587| WO2019038302A1|2017-08-22|2018-08-21|Telescope with improved performance and simplified mounting|
    US16/640,025| US10976517B2|2017-08-22|2018-08-21|Telescope with improved performance and simplified mounting|
    EP18758612.8A| EP3673313B1|2017-08-22|2018-08-21|Telescope with improved performance and simplified mounting|
    IL272648A| IL272648A|2017-08-22|2020-02-13|Telescope with improved performance and simplified mounting|
    ZA2020/01118A| ZA202001118B|2017-08-22|2020-02-21|Telescope with improved performance and simplified mounting|
    [返回顶部]