• 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:
    Disclosed is an optical scanning device configured to scan a beam scattered by bubbles moving at a constant speed in a circulating fluid tube. This optical scanning device includes a light source; A collimating lens for converting incident light into parallel light; A cylindrical lens for forming a linear image; An optical scanning device comprising: a photosensitive medium having a phase; A circulating fluid tube filled with the fluid; A pump for supplying bubbles to the fluid pipe and allowing the fluid to flow at a predetermined speed; And an imaging lens for imaging the scattered beam on the photosensitive medium after the beam incident from the light source and passing through the collimating lens and the cylindrical lens is scattered by the bubble. As described above, the volume of the optical scanning device can be reduced, and the production can be easily performed to increase productivity.
    公开号:KR20020022420A
    申请号:KR1020000055200
    申请日:2000-09-20
    公开日:2002-03-27
    发明作者:엄재용；정승태
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Optical scanning apparatus
    [15] The present invention relates to a light scanning device, and more particularly, to a light scanning device for scanning by using a beam scattered by a bubble moving at a constant speed in the fluid tube.
    [16] The optical scanning device is a device which is employed in a printing machine to form, for example, an electrostatic latent image by scanning laser light onto a photosensitive medium such as a photosensitive belt. In particular, as the demand for color printing from black and white printing increases, interest in a scanning device employed in a color printer is increasing. In such a color laser printer, a scanning device is provided for each of four colors of Y (yellow), M (magenta), C (cyan), and BK (black), respectively.
    [17] Referring to FIG. 1, a general optical scanning device includes a light source 100, a rotating polygon mirror 105 that is rotated by a motor (not shown) to reflect light from the light source 100, and the rotating polygon mirror ( F-θ lens 115 and the f-θ lens 115 so that the light reflected by 105 forms a suitable spot in the scanning line 118 on the photosensitive medium 110, for example, photosensitive belt 110, respectively. The reflective mirror 120 is disposed on an optical path between the photosensitive belts 110 and reflects incident light such that a path of the light passing through the f-theta lens 115 is formed toward the scanning line 118 on the photosensitive belt 110. Include. By controlling the light source 100 on-off, a predetermined image is formed on the photosensitive belt 110 as an electrostatic point.
    [18] On the other hand, on the optical path between the light source 100 and the rotating polygon mirror 105, a linear image is formed on the collimating lens 122 for converting the incident light into parallel light, and the reflective surface of the rotating polygon mirror 105. Cylindrical lenses 135 are arranged for each other. Reference numeral 125 denotes a sensor for detecting the position where the scan line 118 starts.
    [19] Here, the light emitted from the light source 100 is converted into parallel light by the collimating lens 122, and the parallel light is reflected by the rotating polygon mirror 105 through the cylindrical lens 135. do. After the light reflected by the rotating polygon mirror 105 passes through the f-θ lens 115, the path is converted by the reflecting mirror 120 so that the scanning line 118 of the photosensitive belt 110 is changed. The spot is formed at any one of the points.
    [20] As described above, the conventional optical scanning device has a complex structure such as the f-θ lens 115 and the rotating polygon mirror 105, which is not only bulky, but also most of the f-θ lens has an aspherical surface shape, and thus the processing is very difficult. Difficult and expensive In addition, the difficulty of processing is a high product defect rate, resulting in problems such as color registration performance degradation.
    [21] The present invention has been made to solve the above problems, the bubble is rotated at a constant speed in the circulating fluid tube, it is to be scanned by the beam scattered by the bubble, the volume is small, easy to process and produce The purpose is to provide a low cost optical scanning device.
    [1] 1 is a view showing a conventional optical scanning device,
    [2] 2 is a schematic diagram of an optical scanning device according to an embodiment of the present invention;
    [3] 3 is a view showing a fluid tube of the optical scanning device according to the present invention,
    [4] 4 and 5 is a view showing a bubble of the optical scanning device according to the present invention,
    [5] Figure 6 is a view showing a fluid tube of the optical scanning device according to another embodiment of the present invention.
    [6] <Description of main part of drawing>
    [7] 10 ... light source 15 ... collimating lens
    [8] 20 Cylindrical lenses 25 Fluid
    [9] 30.Fluid tube 30a ... Injection line
    [10] 35.Bubble 40.Pump
    [11] 45 ... imaging lens 50 ... photosensitive belt
    [12] 55 scan line 60 position sensor
    [13] 65 ... controller 75 ... speed detection sensor
    [14] d ... scanning line length D ... scanning line length
    [22] The optical scanning device according to the present invention comprises: a light source for irradiating light to achieve the above object; A circulating fluid pipe; A fluid accommodated in the fluid pipe and transmitting incident light incident from the light source; At least one bubble contained within the fluid tube and scattering incident light; A pump installed at one side of the fluid pipe to allow the bubble to circulate at a predetermined speed; And an imaging lens configured to form a beam incident from the light source and scattered in the bubble along a predetermined scan line.
    [23] Referring to FIG. 2, the optical scanning device according to the preferred embodiment of the present invention includes a light source 10 for irradiating light, a collimating lens 15 for converting a beam emitted from the light source 10 into parallel light, and It includes a cylindrical lens 20 for focusing light.
    [24] In addition, a circulating fluid pipe 30 filled with the fluid 25 is provided, and a pump 35 is accommodated inside the fluid pipe 30 and circulates the bubble 35 at a predetermined speed ( 40 is installed around the fluid pipe 30. In addition, an imaging lens 45 is provided at the front of the fluid tube 30 to form a beam scattered from the bubble 35 so as to scan the photosensitive medium 50.
    [25] The pump 40 is controlled by the controller 43 so that the fluid 25 flows at a constant speed v. Then, the bubble 35 moves with the flow of the fluid 25. The fluid pipe 30 is a circulating pipe having a central portion so that the fluid 25 contained therein can circulate.
    [26] When the starting point and the ending point of scanning in the fluid tube 30 are sp and ep, respectively, the fluid tube 30a between the sp and ep should be straight. This is required so that the scan line 55 appears in a straight line on the photosensitive medium 50. Here, the fluid pipe between sp and ep is called the scan correspondence line 30a, and its length is called d. This length d is determined according to the magnification of the imaging lens 45 and the length of the scanning line 55. If the magnification of the imaging lens 45 is a and the length of the scanning line 55 is D, the following relationship is established.
    [27]
    [28] For example, when the magnification of the imaging lens 45 is 10, the length d of the scan correspondence line 30a of the fluid pipe 30a is preferably 1/10 of D.
    [29] Meanwhile, the bubble 35 arrives at the time point at which the bubble 35 arrives at the scan start point sp and the scan end point ep to control the time at which the light source 10 emits or stops the beam. It is required to detect the timing point. Therefore, the position detecting sensor 60 is provided at a position immediately before the scanning start point sp to detect when the bubble 35 passes the point, and the distance from the point to the scanning start point sp and the The movement speed of the bubble 35 indicates the point in time when the bubble 35 reaches the injection start point sp. In addition, since the length d of the scan correspondence line 30a is known, when the velocity of the bubble 35 is v, the scanning end point can be known by d / v.
    [30] A controller 65 for controlling the light source 10 is provided, and the data detected by the position detection sensor 60 is sent to the controller 65 to be commanded by the controller 65. In this case, the beam is emitted or stopped.
    [31] After the scanning is started as described above, the scanning process will be described with reference to FIGS. 2 and 3.
    [32] When the beam is reflected by the bubble 35 and scattered, the bubble area that affects the scan line 55 is called the effective area A. The beam is reflected and scattered in the effective area A, and the scattered beam passes through the imaging lens 45 to form an image in the opposite direction on the photosensitive medium 50. The spot size formed on the photosensitive medium 50 is closely related to the beam size. For example, if the magnification of the imaging lens 45 is 10, when the beam size is 5 μm, the spot size formed on the image surface is about 50 μm. In addition, when the length d of the scan line 55 is about 300 mm, the length d of the scan correspondence line 30a of the fluid pipe 30 should be about 30 mm. When the scanning speed is V, the speed v of the bubble 35 is 1/10 of the speed V.
    [33] Here, the speed (v) and the size of the bubble 35 is adjustable by the pump 40. In addition, as shown in FIG. 4 or 5, the bubble 35 has a spherical surface facing the light source to scatter incident light at a predetermined angle, and the cross section of the bubble 35 has a circle 35 or an ellipse 36. It may be formed to have a phosphorus shape. The bubble 35 is preferably disposed to be in close contact with the side wall of the fluid pipe (30). This is because, when the bubble 35 moves in the fluid tube 30, the deformation due to the flow rate is minimized. However, even if the shape of the bubble 35 is deformed, the effective area to which the beam is reflected does not change and thus does not significantly affect scanning.
    [34] On the other hand, as the bubble 35 moves, the distance from the cylindrical lens 20 to the bubble 35 also changes, so that the amount of light received by the bubble changes. Therefore, the amount of light is adjusted by the controller 65. Alternatively, a zoom lens (not shown) may be provided between the collimating lens 15 and the cylindrical lens 20 to adjust the focal length of the cylindrical lens to make the amount of light received by the bubble constant. This allows the light distribution to appear uniformly during scanning.
    [35] In addition, a speed sensor (75) capable of measuring the moving speed (v) of the bubble (35) at one point of the fluid pipe (30) is provided to measure the moving speed of the bubble (35) measured thereby To the controller 43 of the pump 40. Then, whenever the bubble 35 rotates the fluid pipe 30 one time, the speed of the bubble 35 may be constantly controlled to maintain a constant scanning speed and performance.
    [36] Meanwhile, the bubble 35 may be a gaseous form such as an air bubble, or a liquid form or a solid form that is different from the fluid 25.
    [37] FIG. 6 illustrates a case where the first bubble 80 and the second bubble 83 have two bubbles in the fluid pipe 30. If you have two bubbles, you can scan at twice the speed of one bubble. In this case, looking at the bubble movement mechanism, when the first bubble 80 passes through the scan-response line 30a of the fluid tube 30, the second bubble 83 passes through the opposite line 30b. To do that. For example, when the first bubble 80 arrives at the injection start point sp, the second bubble 83 is positioned at a corner of the diagonal direction such that the first bubble 80 is connected to the fluid tube. The second bubble 83 causes the opposite line 30b to move while the scan correspondence line 30a of 30 is moved. By moving the two bubbles point-symmetrically, the scanning interval can be adjusted.
    [38] Here, d 'represents a scanning correspondence line. In this case, the position detection sensor 60 and the speed detection sensor 75 operate in the same manner as described above. In this way, the scanning speed can be increased.
    [39] As described above, the present invention is to scan by scattering the beam scattered by the bubble moving in the circulating fluid tube, so that the volume of the optical scanning device is small and easy to manufacture, thereby improving productivity and reducing cost. There is an advantage.
    权利要求:
    Claims (9)
    [1" claim-type="Currently amended] A light source for irradiating light;
    A circulating fluid pipe;
    A fluid accommodated in the fluid pipe and transmitting incident light incident from the light source;
    At least one bubble contained within the fluid tube and scattering incident light;
    A pump installed at one side of the fluid pipe to allow the bubble to circulate at a predetermined speed;
    And an imaging lens for imaging the beam incident from the light source and scattered from the bubble along a predetermined scan line.
    [2" claim-type="Currently amended] The method of claim 1, wherein the bubble,
    Optical scanning device, characterized in that consisting of gas, liquid or solid.
    [3" claim-type="Currently amended] The method of claim 1 or 2, wherein the bubble is,
    The surface facing the light source is a spherical surface, the optical scanning device, characterized in that the cross section is circular or oval so that the beam can be scattered at a predetermined angle.
    [4" claim-type="Currently amended] The method of claim 1 or 2, wherein the bubble is,
    The optical scanning device, characterized in that arranged to be in close contact with the side wall of the fluid tube to minimize deformation of its shape during movement.
    [5" claim-type="Currently amended] The optical scanning device of claim 1 or 2, further comprising a position detection sensor for detecting a position of the bubble to determine a time point at which scanning starts.
    [6" claim-type="Currently amended] The scanning line of claim 1 or 2, wherein the point at which scanning starts in the fluid tube is sp, and the point at which scanning is terminated is ep, the length of the scan correspondence line between the sp and ep is d, The length of is referred to as D, when the magnification of the imaging lens is a, d is an optical scanning device, characterized in that to satisfy the following equation.
    Equation

    [7" claim-type="Currently amended] The optical scanning device of claim 1 or 2, further comprising a speed sensor configured to detect a speed of the bubble.
    [8" claim-type="Currently amended] The optical scanning device of claim 7, wherein the pump comprises a controller that receives the bubble speed from the speed sensor and controls the bubble speed to be maintained at a predetermined speed.
    [9" claim-type="Currently amended] The optical system of claim 1, further comprising: a collimating lens configured to convert incident light into parallel light on an optical path between the light source and the fluid tube; And a cylindrical lens for shaping the light focused in the collimating lens.
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    同族专利:
    公开号 | 公开日
    US20020054414A1|2002-05-09|
    KR100657257B1|2006-12-14|
    JP2002131678A|2002-05-09|
    JP3497145B2|2004-02-16|
    US6509997B2|2003-01-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-09-20|Application filed by 윤종용, 삼성전자 주식회사
    2000-09-20|Priority to KR1020000055200A
    2002-03-27|Publication of KR20020022420A
    2006-12-14|Application granted
    2006-12-14|Publication of KR100657257B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020000055200A|KR100657257B1|2000-09-20|2000-09-20|Optical scanning apparatus|
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