• 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:
    Universal device for the relative displacement between the optical plane and the focal plane of a lens and a camera. It consists of a frame (1) for fixing the body of the camera (2), from whose sides each forks emerge (5) that are finished off in respective joints (6) for a bridge (7 - 7'), with a " U "inverted, so that the imaginary axis that joins both joints coincides with the focal plane or sensor of the camera (2). The joints (6) include means for adjusting the tilt of the bridge (7-7'), as well as guiding means (9) for axial displacement of the lateral arms (7') of the bridge, while the spar (7) It has longitudinal guiding means (11) for a carriage (12) that is associated at the bottom with a rotating base (14), whose axis of rotation coincides with the focal plane or sensor of the camera (2). The rotating base (14) has guiding means for a support (17) on which the objective (18) is fixed. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2784875A1
    申请号:ES201930274
    申请日:2019-03-26
    公开日:2020-10-01
    发明作者:Una Jaime Sergio De
    申请人:Cinema Gear Desing S L；
    IPC主号:
    专利说明:

    [0002] Universal device for the relative displacement between the optical plane and the focal plane of a lens and a camera
    [0004] TECHNICAL SECTOR
    [0006] The present invention refers to a universal device for the relative displacement between the optical plane and the focal plane, allowing the parallel and incidence displacement of the optical axis to the focal plane (sensor plane), taking the focal plane itself as the axis of said rotation. (sensor or focus point), in order to allow different optical effects, as well as many other applications, which in the photographic / cinematographic field are known as “Tilt-Shift” effects.
    [0008] The object of the invention is to provide a device that allows to carry out this type of effects both individually and in combination (any combination of x-axes, and in addition to left-right and up-down oscillation optical plane displacement and its terminations. ) in addition to adapting to any type of lens and camera (that allows such movements), with the special particularity that the rotation of the optics is carried out with respect to an imaginary axis of rotation located on the focal plane, avoiding thus deformations of the captured image, allowing it to pivot at a specific point selected in the focal plane of said rotation of the optics or point of focus.
    [0010] Ultimately, the device of the invention aims to make it possible to carry out the following displacement movements of the optical plane:
    [0012] • Up-down displacement (parallel to the focal plane):
    [0013] • Optical plane SHIFT up (+ Y). Off center optical center up
    [0014] • Downward SHIFT optical plane (-Y). Off center optical center down
    [0015] • Left-right shift (parallel to the focal plane):
    [0016] • Right SHIFT optical plane (+ X). Off center optical center right
    [0017] • Left SHIFT optical plane (-X). Off center optical center left
    [0019] • Front-back tilt (pivot point at the focal plane):
    [0020] • Optical plane TILT forward (-Tilt °). Tilt the object's plane to the ground
    [0021] • TILT optical plane to the rear (+ Tilt °). Tilt object's plane to the sky
    [0022] • Left-right tilt (pivot point in the focal plane):
    [0023] • Optical plane SWING to the left (-SWING °). Tilt Object Plane Left
    [0024] • Optical plane SWING to the right (+ SWING °). Tilt Object Plane Right
    [0025] • Movement in Z (longitudinal displacement) to allow the adjustment of the different types of lenses and their collimation, depending on the distance of formation of the image in the focal plane.
    [0027] BACKGROUND OF THE INVENTION
    [0029] Figure 1a schematically shows the classical arrangement between the lens (1) and the sensor (2) of a camera when capturing the image of a subject (3), so that the optics provide a focal plane (4 ), in which a depth of field (5 5 ') is established in which the image is sharp, so that any element that is outside the range of the depth of field of said focal plane (4) will appear out of focus .
    [0031] Thus, in a conventional camera, the focal plane is always parallel to the sensor (2).
    [0033] Now, if what is intended is to obtain an inclined focal plane (4 '), that is to say that it adapts to the inclination of the subject (3) in order for it to appear perfectly focused throughout its length, it is necessary to modify the angle that forms the lens (1) with the sensor (2), as shown in figure 1b.
    [0035] This effect is known as the “Front-Tilt-Swing” effect, so there are specific lenses that allow its optics to oscillate with respect to the sensor of the camera on which it is applied, as well as, in some cases, move the lens in a direction parallel to the sensor, an effect known as "Shift", which allows changing the frame, since the sensor of a camera does not use 100% of the field of view offered by a lens, so this shift allows obtaining different frames
    [0036] As is obvious, having to use a specific type of lens greatly limits the performance to be achieved, since in some cases the brightness of the lens will be decisive, in others the depth of field, in others the focal length, etc. that this solution is clearly unsatisfactory. For not going into assessing the artistic conditions of the choice of lenses, since each type of manufacturer provides characteristics of color, texture and quality. This greatly limited the choice of lenses that the artist or technician may want.
    [0038] However, there is an even bigger problem, and that is that in this type of lens the lens rotates on itself, or in the best of cases on an intermediate point between it and the sensor (inside the lens mount), but never on the focal plane of the sensor, which causes the projected image to deform with respect to the perpendicular, that is, the lines of perspective do not leak from the focal plane of the sensor.
    [0040] Furthermore, this type of device does not allow the aforementioned “Tilt-shift” effects to be carried out in a combined way, having to choose only one of them, or a combination of 2 of them must be chosen.
    [0042] EXPLANATION OF THE INVENTION
    [0044] The universal device for the displacement between the lens and the focal plane of an objective and a camera that is advocated solves in a fully satisfactory way the aforementioned problems, based on a highly effective and versatile solution.
    [0046] For this, and more specifically, the device of the invention is constituted from a frame that acts as a base on which the body of the camera is fixed, regardless of the type, which is arranged in a stable and stable way. previously devoid of the front mount of the optics.
    [0048] Said base has laterally a pair of vertical and inclined arms in the form of a fork that converge at the articulation point of a bridge, with an inverted “U” configuration, so that the midpoint of the imaginary axis that would join both articulations of the bridge on the fork is coincident with the focal plane or sensor of the camera.
    [0049] In correspondence with the tilt axes of the fork for the bridge, the device will include means of angular adjustment for said bridge and locking, either manual or electronic.
    [0051] The aforementioned lateral fork joints are related to the lateral arms of the bridge through guide means that allow axial displacement of said lateral arms, a displacement that can be carried out through a transmission that can be operated by means of a manual control, or electronically controlled.
    [0053] On the vertical beam of the bridge, longitudinal guiding means are established for a carriage that, as in the previous cases, can be moved manually, by means of a transmission mechanism associated with a crank arranged on said bridge, or said movement be electronically controlled.
    [0055] Above said carriage a rotary base emerges from the bottom equipped with means for angular regulation for the same, either mechanical or electronic, a rotary base in which guides are finally established in which a support for the objective is axially movable.
    [0057] These guides allow to regulate the focal length between the lens and the camera sensor, being able to include micro-adjustment means in said distance to adjust the collimation.
    [0059] From this structure, the objective is arranged, as is conventional, at a certain distance from the sensor, a set that will be covered by a flexible envelope, but with the particularity that both the horizontal rotation axis for the objective presented by the device , as well as the vertical axis of rotation of the rotating base are aligned with the sensor, contrary to what happens in other lenses, so that the objective will always rotate with respect to the focal plane of the sensor, thus avoiding image deformation , allowing the inciting readjustment of the optics in both Tilt ° and Swing ° without varying the projection of the image on the focal plane.
    [0061] This rotation in both the vertical and horizontal direction is controlled by the means of control of rotation of the bridge with respect to the fork and of the carriage with respect to the rolling base, thus allowing to control the “Tilt” and “Swing” effect.
    [0062] For its part, the longitudinal displacement of the carriage in one direction or the other, as well as the displacement of the lateral arms of the bridge with respect to the fork joints, in an upward or downward direction, allow the objective to be displaced in the XY axes according to with the "Shift" effect.
    [0064] As can be deduced from the foregoing, the horizontal displacement of the carriage, as well as the vertical displacement of the bridge, are not affected by the angular movements offered by the device, so obviously both "tilt-shift" effects can be carried out in a combined without limitations in this regard.
    [0066] Since the objects to be supported could have a considerable weight, it has been envisaged that the bridge may be assisted by at least one shock absorber established between said upper branch of the bridge and the articulation with the fork.
    [0068] In the same way, the means of articulation of the fork could include means of counterbalance of the weight, in order to an optimal stability of the whole.
    [0070] Finally, it only remains to point out that all the previously described regulation mechanisms may incorporate blocking means, in order to allow one lens to be replaced by another, without having to readjust the device.
    [0072] From this structuring, the following advantages are achieved:
    [0074] • The system rotates on the focal plane of the sensor (film, or the point we choose), allowing Tilt and Swing movements without having to correct the location of the lens or the focal plane.
    [0076] • Allows you to choose the center of the focal plane in X or Y decentration and rotate the optical center of the lens around that point.
    [0078] • Thanks to the two previous characteristics, it allows you to gradually modify the focus plane without having to modify either the perspective or the angulation at the point we want to select from the focal plane.
    [0079] • Allows the use of any lens of any mount that does not require electronics for control from the camera body, being able to size the device to support lenses of considerable weight.
    [0081] • Allows you to move the focus ring independently of the shift, tilt, swing, that is, offset or tilt.
    [0083] • Allows the use of filter holders (proximity and neutral filters).
    [0085] • It can be locked and used in a neutral way with the values at 0 in both X, Y and 0 ° of tilt and swing.
    [0087] • It is universal, allowing it to fit all cameras, with limited dimensions and removable camera mounts.
    [0089] • The cameras do not have to bear any weight or effort.
    [0091] • The data is visible through an electronic interface and sent by connection to other devices.
    [0093] BRIEF DESCRIPTION OF THE DRAWINGS
    [0095] To complement the description that is going to be made below and in order to help a better understanding of the characteristics of the invention, according to a preferred example of a practical embodiment thereof, a set of drawings is attached as an integral part of said description. where, for illustrative and non-limiting purposes, the following has been represented:
    [0097] Figures 1a-1b.- Show a schematic representation of the conventional way of focusing a camera, and the effect that is achieved when the lens is tilted with respect to the camera sensor.
    [0098] Figure 2.- Shows a side-top perspective view of a universal device for the displacement between the lens and the focal plane of an objective and a camera made in accordance with the object of the present invention.
    [0100] Figure 3.- Shows an opposite perspective view of the device of figure 2.
    [0102] Figure 4.- Shows a front view of the device of the invention according to a simpler embodiment variant.
    [0104] Figure 5.- Shows a side view of the device of figure 4.
    [0106] Figure 6.- Shows a top plan view of the device of figure 4.
    [0108] Figure 7.- Shows a view similar to figure 5, but with the camera and the lens implanted on the device.
    [0110] Figure 8.- Shows, finally, a plan view of the assembly of figure 7.
    [0112] PREFERRED EMBODIMENT OF THE INVENTION
    [0114] In view of the outlined figures, it can be seen how the device of the invention is constituted from a frame (1) as a base on which the body of the camera (2) is fixed, through the classic system of bars (3), insertable in holes (4), established in said frame (1), which has a flattened configuration, emerging from its sides oblique branches of an inverted "V" configuration, determining a fork (5), at the upper end of which articulations (6) are established for a bridge (7-7 '), with an inverted "U" configuration, so that the midpoint of the imaginary axis that would join both articulations of the bridge on the fork coincides with the focal plane or camera sensor (2).
    [0116] Said joints (6) include means for adjusting the tilt of the bridge (7-7 '), which in the chosen embodiment are embodied in a knob (8), but which could also materialize in electronically controlled motorized means.
    [0118] Guiding means (9) are established in the joints (6) for axial displacement of the lateral arms (7 ') of the bridge, displacement that can be carried out through a transmission that can be operated by means of an upper manual control (10), established on the spar (7) of the bridge, or electronically controlled.
    [0120] As previously mentioned, longitudinal guiding means (11) are established in the bridge beam (7) for a carriage (12) movable through a lateral control (13), or electronically, carriage (12) that is associated at the bottom with a rotary base (14) whose axis of rotation coincides with the focal plane or sensor of the camera (2), and which, as in the previous cases, can be moved manually, through a rear control (15) or that said movement is electronically controlled.
    [0122] The rotating base has a pair of guides (16) in which a support (17) is movable and lockable on which the objective (18) is finally fixed.
    [0124] These guides (16) allow to regulate the focal length between the lens and the camera sensor, being able to include micro-adjustment means (19) in said distance to adjust the collimation.
    [0126] From this structuring, by acting on the controls (10 and 13) it is possible to adjust the displacement of the lens in the axes (X and Y) that is to say, control the "Shift", while by acting on the controls (8 and 15 ) it is possible to adjust the inclination of the lens with respect to the focal plane, that is, the "Tilt" and "Swing".
    [0128] All these controls (10,13, 8, 15,19) will have locking means (20) to stabilize the mechanisms associated with them.
    [0130] As previously said, given that the targets (18) to be supported could have considerable weight, it has been foreseen that the bridge can be assisted by at least one shock absorber (21) established between said upper branch of the bridge. and the articulation with the fork.
    [0132] In the variant embodiment of Figures 2 and 3, it can be seen how optionally the device can incorporate a display (22) in which to show the different parameters in millimeters and degrees of the relative position between camera and objective.
    [0134] Finally, it only remains to point out that the development of the device, as it cannot be otherwise, requires linking some means of tipping and displacement with others as its development progresses from a first means of displacement or tipping, having to choose a "starting point", in this case having chosen the horizontal tilting axis, to finally obtain each and every one of the preset movements, which are really the objective of the invention, so that it would be evident to an expert in the subject will develop an equivalent device starting with another "starting point", for example the vertical axis as the main structure, and from there the rest of the mechanisms that offer the degrees of freedom that are the object of the present invention are implemented.
    权利要求:
    Claims (11)
    [1]
    1a.- Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, characterized in that it is made up of a frame (1) for fixing the body of the camera (2), whose sides Forks emerge (5) that end in respective joints (6) for a bridge (7-7 '), with an inverted "U" configuration, so that the imaginary axis that joins both joints is coincident with the focal plane or camera sensor (2), having provided that the joints (6) include means for adjusting the tilt of the bridge (7-7 '), as well as guiding means (9) for axial displacement of the lateral arms (7' ) of the bridge, counting the beam (7) of said bridge with longitudinal guiding means (11) for a carriage (12) that is associated at the bottom with a rotary base (14), whose axis of rotation coincides with the focal plane or sensor chamber (2), rotating base (14) which in turn has m Guiding means for a support (17) on which the objective (18) is fixed.
    [2]
    2. Universal device for the relative displacement between the optical plane and the focal plane of a lens and a camera, according to claim 1, characterized in that a flexible envelope is arranged between camera and lens.
    [3]
    3.Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that the means for adjusting the tilt of the bridge (7-7 ') are embodied in a transmission associated with a command (8), or said means may be electronically controlled.
    [4]
    4.Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that the guiding means (9) for axial displacement of the lateral arms (7 ') of the bridge they materialize in a transmission associated with a command (13), or said means can be electronically controlled.
    [5]
    5.Universal device for the relative movement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that the longitudinal guiding means (11) for the carriage (12) include a transmission associated with a command (10), or said means may be electronically controlled.
    [6]
    6.Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that the rotating base (14) includes a knob (15) for angular regulation, or said regulation angular can be electronically controlled.
    [7]
    7. Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that in correspondence with the guides (16), micro-adjustment means (19) are included to adjust collimation.
    [8]
    8. Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that it includes locking means (20) for the device adjustment means.
    [9]
    9. Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that the bridge can be assisted by at least one damper (21) established between the branch (7) upper bridge and joint (6) with fork (5).
    [10]
    10. Universal device for the relative displacement between the optical plane and the focal plane of an objective and a camera, according to claim 1, characterized in that it includes counterbalance means.
    [11]
    11. Universal device for the relative movement between the optical plane and the focal plane of a lens and a camera, according to claim 1, characterized in that it includes a display or screen (22) with information on the relative position between camera and lens.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4095246A|1976-03-27|1978-06-13|Ferdinand Kellner|Bellows setting equipment|
    US5592331A|1995-01-18|1997-01-07|Eastcott; John|Optical adapter for controlling the angle of the plane of focus|
    US20120070141A1|2010-09-17|2012-03-22|Erwin Scholz|Tilt shift lens adapter|
    EP2910998A1|2014-02-20|2015-08-26|Canon Kabushiki Kaisha|Adapter and camera system|
    CN104991404A|2015-07-27|2015-10-21|张春天|Large and medium-frame lens tilt-shift swinging technology translation device|
    法律状态:
    2020-10-01| BA2A| Patent application published|Ref document number: 2784875 Country of ref document: ES Kind code of ref document: A1 Effective date: 20201001 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930274A|ES2784875B2|2019-03-26|2019-03-26|Universal device for the relative displacement between the optical plane and the focal plane of a lens and a camera|ES201930274A| ES2784875B2|2019-03-26|2019-03-26|Universal device for the relative displacement between the optical plane and the focal plane of a lens and a camera|
    EP20779734.1A| EP3951493A1|2019-03-26|2020-03-20|Universal device for relative movement between the optical plane and the focal plane of a lens and a camera|
    PCT/ES2020/070197| WO2020193831A1|2019-03-26|2020-03-20|Universal device for relative movement between the optical plane and the focal plane of a lens and a camera|
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