A lens translation centering device

Abstract

This utility model belongs to the field of lens testing technology and discloses a lens translation and alignment device, including: a base; an X-axis drive mechanism, including an X-axis drive assembly and a first translation plate, wherein the X-axis drive assembly drives the first translation plate to move along the X direction; a Y-axis drive mechanism, including a Y-axis drive assembly and a second translation plate, wherein the Y-axis drive assembly is mounted on the first translation plate and drives the second translation plate to move along the Y direction; a lens fixture, fixed to the second translation plate, wherein the lens fixture is used to fix the lens to be tested; and a pressing mechanism, including a pressing drive component and a pressing rod, wherein the pressing drive component is mounted on the fixed end of the Y-axis drive assembly and drives the pressing rod to press against the lens to be tested from above. The lens translation and alignment device provided by this utility model presses the lens to be tested against the lens fixture through the pressing mechanism, avoiding the lens to be tested from shaking or shifting relative to the lens fixture, thereby improving the accuracy of MTF test results.

Description

Technical Field

[0001] This utility model relates to the field of lens testing technology, and in particular to a lens translation and centering device. Background Technology

[0002] MTF (Modulation Transfer Function) alignment technology is a technique that improves the imaging quality of an optical system by detecting and adjusting the MTF value.

[0003] During MTF alignment testing, the lens under test needs to be positioned coaxially with the chart and the camera. Currently, the lens under test is prone to shaking and shifting during testing, affecting the accuracy of the MTF test results.

[0004] Therefore, there is an urgent need for a lens translation and centering device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a lens translation and alignment device that uses a pressing mechanism to press the lens under test onto the lens fixture, thereby preventing the lens under test from shaking or shifting relative to the lens fixture and improving the accuracy of MTF test results.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A lens translation and centering device is provided, comprising:

[0008] Base;

[0009] An X-axis drive mechanism includes an X-axis drive assembly and a first translation plate. The X-axis drive assembly is mounted on the base, and the first translation plate is mounted on the actuating end of the X-axis drive assembly. The X-axis drive assembly is used to drive the first translation plate to move along the X direction.

[0010] The Y-axis drive mechanism includes a Y-axis drive assembly and a second translation plate. The Y-axis drive assembly is mounted on the first translation plate, and the second translation plate is mounted on the execution end of the Y-axis drive assembly. The Y-axis drive assembly is used to drive the second translation plate to move along the Y direction, and the X direction is perpendicular to the Y direction.

[0011] A lens fixture is fixed to the second translation plate, and the lens fixture is used to fix the lens to be tested.

[0012] The pressure attachment mechanism includes a pressure attachment drive and a pressure attachment rod. The pressure attachment drive is mounted on the fixed end of the Y-axis drive assembly, and the pressure attachment rod is connected to the actuating end of the pressure attachment drive. The pressure attachment drive is used to drive the pressure attachment rod to press against the lens under test from above.

[0013] Preferably, the first end of the pressure rod is connected to the actuating end of the pressure drive, and the second end of the pressure rod is provided with a clearance notch, which is used to avoid the lens of the lens under test.

[0014] Preferably, the second end of the pressure rod is further provided with a buffer shaft and a buffer spring. The buffer shaft passes through the second end of the pressure rod, and the buffer spring is sleeved on the buffer shaft. The two ends of the buffer spring are respectively connected to or abut against the second end of the pressure rod and the buffer shaft. The pressure rod presses against the lens to be tested through the buffer shaft.

[0015] Preferably, along the Y direction, the second translation plate is provided with at least two lens fixtures, the Y-axis drive assembly can drive any of the lens fixtures to the inspection station, and the pressing mechanism is set corresponding to the inspection station.

[0016] Preferably, the pressure-adhesion drive is a rotary motor or a rotary cylinder.

[0017] Preferably, the X-axis drive assembly includes a first rotary motor and a first lead screw and nut assembly. The first rotary motor is mounted on the base via a first motor frame. The lead screw of the first lead screw and nut assembly is connected to the output shaft of the first motor. The first translation plate is connected to the nut of the first lead screw and nut assembly; and / or

[0018] The Y-axis drive assembly includes a second rotary motor and a second lead screw and nut assembly. The second rotary motor is mounted on the first translation plate via a second motor frame. The lead screw of the second lead screw and nut assembly is connected to the output shaft of the second motor. The second translation plate is connected to the nut of the second lead screw and nut assembly.

[0019] Preferably, the X-axis drive mechanism further includes a first guide rail and a first guide block. The first guide rail is fixed to the base and extends along the X direction. The first guide block is slidably disposed on the first guide rail. The first translation plate is connected to the first guide block.

[0020] Preferably, both ends of the first guide rail are provided with blocking blocks, and the two blocking blocks respectively limit the maximum stroke of the first translation plate from both ends to prevent the first translation plate from detaching from the first guide rail.

[0021] Preferably, the Y-axis drive mechanism further includes a second guide rail and a second guide block. The second guide rail is fixed to the base and extends along the Y direction. The second guide block is slidably disposed on the second guide rail. The second translation plate is connected to the second guide block.

[0022] Preferably, the X-axis drive mechanism further includes a first sensing plate and a plurality of first proximity switches. The first sensing plate is mounted on the actuating end of the X-axis drive assembly, and the plurality of first proximity switches are spaced apart along the X-direction at the fixed end of the X-axis drive assembly. When the first sensing plate moves along the X-direction, it can trigger the first proximity switch at the corresponding position; and / or

[0023] The Y-axis drive mechanism further includes a second sensing plate and a plurality of second proximity switches. The second sensing plate is mounted on the execution end of the Y-axis drive assembly, and the plurality of second proximity switches are spaced apart along the Y direction at the fixed end of the Y-axis drive assembly. When the second sensing plate moves along the Y direction, it can trigger the second proximity switch at the corresponding position.

[0024] The beneficial effects of this utility model are:

[0025] The lens translation and alignment device provided by this utility model drives the lens fixture to move horizontally along mutually perpendicular X and Y directions via X-axis and Y-axis drive mechanisms, respectively, to adjust the horizontal position of the lens under test and achieve rapid translation and alignment. During testing, the pressing mechanism drives the pressing rod to press the lens under test from above via the pressing drive component, pressing the lens under test firmly onto the lens fixture, ensuring that the lens under test is always in the testing position, preventing the lens under test from shaking or shifting relative to the lens fixture, and improving the accuracy of MTF test results. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the lens translation and centering device provided by this utility model. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the lens translation and centering device provided by this utility model. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the pressing mechanism provided by this utility model.

[0029] In the picture:

[0030] 100. Lens to be tested;

[0031] 10. X-axis drive assembly; 11. First rotary motor; 12. First lead screw and nut assembly; 13. First motor frame; 14. First proximity switch; 20. First translation plate;

[0032] 30. Y-axis drive assembly; 31. Second rotary motor; 32. Second lead screw and nut assembly; 33. Second motor frame; 34. Second sensing plate; 35. Second proximity switch; 40. Second translation plate;

[0033] 50. Lens jig;

[0034] 60. Pressing mechanism; 61. Pressing drive component; 62. Pressing rod; 621. Relief notch; 63. Buffer shaft; 64. Buffer spring;

[0035] 71. First guide rail; 72. First guide block; 73. Blocking block; 81. Second guide rail; 82. Second guide block; 90. Base. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] This embodiment provides a lens translation and alignment device applied to lens testing equipment. Its function is to fix the lens 100 under test and move it to the testing station. For example... Figures 1-3 As shown, the lens translation and alignment device includes a base 90, an X-axis drive mechanism, a Y-axis drive mechanism, a lens fixture 50, and a pressing mechanism 60. The X-axis drive assembly 10 is used to drive the first translation plate 20 to move along the X direction, the Y-axis drive assembly 30 is used to drive the second translation plate 40 to move along the Y direction, and the lens fixture 50 is used to fix the lens 100 to be tested.

[0041] Furthermore, such as Figures 1-3 As shown, the X-axis drive mechanism includes an X-axis drive assembly 10 and a first translation plate 20. The X-axis drive assembly 10 is mounted on the base 90, and the first translation plate 20 is mounted on the execution end of the X-axis drive assembly 10. The Y-axis drive mechanism includes a Y-axis drive assembly 30 and a second translation plate 40. The Y-axis drive assembly 30 is mounted on the first translation plate 20, and the second translation plate 40 is mounted on the execution end of the Y-axis drive assembly 30. The lens fixture 50 is fixed to the second translation plate 40. The pressing mechanism 60 includes a pressing drive member 61 and a pressing rod 62. The pressing drive member 61 is mounted on the fixed end of the Y-axis drive assembly 30, and the pressing rod 62 is connected to the execution end of the pressing drive member 61. The pressing drive member 61 is used to drive the pressing rod 62 to press against the lens 100 under test from above.

[0042] Specifically, the lens translation and alignment device provided in this embodiment drives the lens fixture 50 to move horizontally along mutually perpendicular X and Y directions via X-axis and Y-axis drive mechanisms, respectively, to adjust the horizontal position of the lens 100 under test and achieve rapid translation and alignment. During testing, the pressing mechanism 60 drives the pressing rod 62 from above to press the lens 100 under test onto the lens fixture 50 via the pressing drive member 61, ensuring that the lens 100 under test is always in the testing position, preventing the lens 100 under test from shaking or shifting relative to the lens fixture 50, and improving the accuracy of the MTF test results.

[0043] It should be noted that the X direction is perpendicular to the Y direction, and both the X and Y directions are in the horizontal plane.

[0044] For example, such as Figure 1 and Figure 2As shown, along the Y-direction, the second translation plate 40 is provided with at least two lens fixtures 50. The Y-axis drive assembly 30 can drive any lens fixture 50 to move to the testing station, and the pressing mechanism 60 is set corresponding to the testing station. In this embodiment, the second translation plate 40 is provided with two lens fixtures 50, and the two lens fixtures 50 can move alternately to the testing station. When the lens 100 to be tested at the testing station is being tested, the other lens fixture 50 can simultaneously perform the loading of the lens 100 to be tested and the unloading of the tested lens, thereby improving testing efficiency.

[0045] Of course, in other embodiments of this utility model, the number of testing stations can also be set to at least two, and the number of testing stations does not exceed the number of lens fixtures 50. At least two testing stations can perform tests simultaneously, and at least two lens fixtures 50 can be picked up and placed at the same time, reducing the number of pick-up and placement operations and improving testing efficiency.

[0046] For example, such as Figure 1 and Figure 2 As shown, the X-axis drive assembly 10 includes a first rotary motor 11 and a first lead screw and nut assembly 12. The first rotary motor 11 is mounted on the base 90 via a first motor frame 13. The lead screw of the first lead screw and nut assembly is connected to the output shaft of the first motor. The first translation plate 20 is connected to the nut of the first lead screw and nut assembly. When the first rotary motor 11 is activated, it drives the lead screw of the first lead screw and nut assembly 12 to rotate. The first translation plate 20 moves along the X-direction along with the nut of the first lead screw and nut assembly.

[0047] For example, such as Figure 1 and Figure 2 As shown, the X-axis drive mechanism also includes a first guide rail 71 and a first guide block 72. The first guide rail 71 is fixed to the base 90 and extends along the X direction. The first guide block 72 is slidably disposed on the first guide rail 71. The first translation plate 20 is connected to the first guide block 72. Specifically, the nuts of the first guide block 72 and the first lead screw nut pair are respectively connected to the bottom sides of the first translation plate 20. The mechanism has sufficient rigidity, providing stable support and translation guidance for the first translation plate 20. The error of the lens 100 under test translating along the X direction is small, reducing the impact on MTF testing.

[0048] For example, such as Figure 1 and Figure 2 As shown, both ends of the first guide rail 71 are provided with blocking blocks 73. The two blocking blocks 73 limit the maximum stroke of the first translation plate 20 from both ends to prevent the first translation plate 20 from disengaging from the first guide rail 71.

[0049] For example, such as Figure 1 and Figure 2As shown, the X-axis drive mechanism also includes a first sensing plate and a plurality of first proximity switches 14. The first sensing plate is mounted on the actuating end of the X-axis drive assembly 10, and the plurality of first proximity switches 14 are spaced apart along the X direction at the fixed end of the X-axis drive assembly 10. When the first sensing plate moves along the X direction, it can trigger the first proximity switch 14 at the corresponding position. In this embodiment, the number of first proximity switches 14 is three.

[0050] For example, such as Figure 1 and Figure 2 As shown, the Y-axis drive assembly 30 includes a second rotary motor 31 and a second lead screw and nut assembly 32. The second rotary motor 31 is mounted on the first translation plate 20 via a second motor frame 33. The lead screw of the second lead screw and nut assembly is connected to the output shaft of the second motor. The second translation plate 40 is connected to the nut of the second lead screw and nut assembly. When the second rotary motor 31 is activated, it drives the lead screw of the second lead screw and nut assembly 32 to rotate. The second translation plate 40 moves along the Y direction along with the nut of the second lead screw and nut assembly.

[0051] For example, such as Figure 1 and Figure 2 As shown, the Y-axis drive mechanism also includes a second guide rail 81 and a second guide block 82. The second guide rail 81 is fixed to the base 90 and extends along the Y direction. The second guide block 82 is slidably disposed on the second guide rail 81. The second translation plate 40 is connected to the second guide block 82. Specifically, the second guide block 82 and the nuts of the second lead screw nut pair are respectively connected to the bottom sides of the second translation plate 40. The mechanism has sufficient rigidity, providing stable support and translation guidance for the second translation plate 40. The error of the lens 100 under test translating along the Y direction is small, reducing the impact on the MTF test.

[0052] For example, such as Figure 1 and Figure 2 As shown, the Y-axis drive mechanism also includes a second sensing plate 34 and a plurality of second proximity switches 35. The second sensing plate 34 is mounted on the execution end of the Y-axis drive assembly 30, and the plurality of second proximity switches 35 are spaced apart along the Y direction at the fixed end of the Y-axis drive assembly 30. When the second sensing plate 34 moves along the Y direction, it can trigger the second proximity switch 35 at the corresponding position. In this embodiment, the number of second proximity switches 35 is three. Specifically, the three second proximity switches 35 are respectively used to detect whether the lens fixture 50 is in the loading / unloading position and which lens fixture 50 has moved to the detection station.

[0053] For example, such as Figure 1 and Figure 2 As shown, the pressing drive 61 is fixed to the fixed end of the X-axis drive assembly 10 by a connecting plate. The connecting plate is specifically connected to the first motor frame 13. The pressing drive 61 is a rotary motor or a rotary cylinder.

[0054] For example, such as Figures 1-3 As shown, the first end of the pressure rod 62 is connected to the execution end of the pressure drive 61, and the second end of the pressure rod 62 is provided with a clearance notch 621, which is used to avoid the lens of the lens 100 under test. Specifically, the clearance notch 621 is set as a semi-circular or U-shaped structure to adapt to cylindrical lenses.

[0055] For example, such as Figures 1-3 As shown, the second end of the pressure rod 62 is also provided with a buffer shaft 63 and a buffer spring 64. The buffer shaft 63 passes through the second end of the pressure rod 62, and the buffer spring 64 is sleeved on the buffer shaft 63. The two ends of the buffer spring 64 are connected to or abut against the second end of the pressure rod 62 and the buffer shaft 63, respectively. The pressure rod 62 presses against the lens 100 under test through the buffer shaft 63. Specifically, a limiting boss is provided at one end of the buffer shaft 63 away from the test position, and a pressure boss is provided at the other end. The limiting boss is used to prevent the buffer shaft 63 from detaching from the pressure rod 62, and the pressure boss is used to press against the lens 100 under test. The buffer spring 64 is a compression spring, and its two ends abut against the pressure rod 62 and the pressure boss, respectively. The buffer shaft 63 and the buffer spring 64 elastically press against the lens 100 under test, which on the one hand avoids damaging the lens 100 under test, and on the other hand prevents the lens 100 under test from shaking slightly, further reducing the test error.

[0056] For example, such as Figures 1-3 As shown, there are two sets of buffer shafts 63 and buffer springs 64, which are symmetrically arranged on the left and right sides of the clearance notch 621.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A lens translation and centering device, characterized in that, include: Base (90); The X-axis drive mechanism includes an X-axis drive assembly (10) and a first translation plate (20). The X-axis drive assembly (10) is mounted on the base (90), and the first translation plate (20) is mounted on the execution end of the X-axis drive assembly (10). The X-axis drive assembly (10) is used to drive the first translation plate (20) to move along the X direction. The Y-axis drive mechanism includes a Y-axis drive assembly (30) and a second translation plate (40). The Y-axis drive assembly (30) is mounted on the first translation plate (20), and the second translation plate (40) is mounted on the execution end of the Y-axis drive assembly (30). The Y-axis drive assembly (30) is used to drive the second translation plate (40) to move along the Y direction, and the X direction is perpendicular to the Y direction. A lens fixture (50) is fixed to the second translation plate (40), and the lens fixture (50) is used to fix the lens to be tested (100). The pressing mechanism (60) includes a pressing drive (61) and a pressing rod (62). The pressing drive (61) is installed on the fixed end of the Y-axis drive assembly (30), and the pressing rod (62) is connected to the actuating end of the pressing drive (61). The pressing drive (61) is used to drive the pressing rod (62) to press against the lens (100) under test from above.

2. The lens translation and centering device according to claim 1, characterized in that, The first end of the pressure rod (62) is connected to the execution end of the pressure drive (61), and the second end of the pressure rod (62) is provided with a clearance notch (621), which is used to avoid the lens of the lens to be tested (100).

3. The lens translation and centering device according to claim 2, characterized in that, The second end of the pressure rod (62) is also provided with a buffer shaft (63) and a buffer spring (64). The buffer shaft (63) passes through the second end of the pressure rod (62), and the buffer spring (64) is sleeved on the buffer shaft (63). The two ends of the buffer spring (64) are respectively connected to or abut against the second end of the pressure rod (62) and the buffer shaft (63). The pressure rod (62) presses against the lens (100) under test through the buffer shaft (63).

4. The lens translation and centering device according to claim 1, characterized in that, Along the Y direction, at least two lens fixtures (50) are provided on the second translation plate (40), and the Y-axis drive assembly (30) can drive any of the lens fixtures (50) to move to the inspection station. The pressing mechanism (60) is set corresponding to the inspection station.

5. The lens translation and centering device according to claim 1, characterized in that, The pressure-adhesion drive (61) is a rotary motor or a rotary cylinder.

6. The lens translation and centering device according to any one of claims 1-5, characterized in that, The X-axis drive assembly (10) includes a first rotary motor (11) and a first lead screw and nut assembly (12). The first rotary motor (11) is mounted on the base (90) via a first motor frame (13). The lead screw of the first lead screw and nut assembly is connected to the output shaft of the first motor. The first translation plate (20) is connected to the nut of the first lead screw and nut assembly. and / or The Y-axis drive assembly (30) includes a second rotary motor (31) and a second lead screw and nut assembly (32). The second rotary motor (31) is mounted on the first translation plate (20) via a second motor frame (33). The lead screw of the second lead screw and nut assembly is connected to the output shaft of the second motor. The second translation plate (40) is connected to the nut of the second lead screw and nut assembly.

7. The lens translation and centering device according to any one of claims 1-5, characterized in that, The X-axis drive mechanism further includes a first guide rail (71) and a first guide block (72). The first guide rail (71) is fixed to the base (90) and extends along the X direction. The first guide block (72) is slidably disposed on the first guide rail (71). The first translation plate (20) is connected to the first guide block (72).

8. The lens translation and centering device according to claim 7, characterized in that, Both ends of the first guide rail (71) are provided with blocking blocks (73). The two blocking blocks (73) limit the maximum stroke of the first translation plate (20) from both ends to prevent the first translation plate (20) from disengaging from the first guide rail (71).

9. The lens translation and centering device according to any one of claims 1-5, characterized in that, The Y-axis drive mechanism further includes a second guide rail (81) and a second guide block (82). The second guide rail (81) is fixed to the base (90) and extends along the Y direction. The second guide block (82) is slidably disposed on the second guide rail (81). The second translation plate (40) is connected to the second guide block (82).

10. The lens translation and centering device according to any one of claims 1-5, characterized in that, The X-axis drive mechanism further includes a first sensing plate and a plurality of first proximity switches (14). The first sensing plate is mounted on the actuating end of the X-axis drive assembly (10), and the plurality of first proximity switches (14) are spaced apart along the X direction at the fixed end of the X-axis drive assembly (10). When the first sensing plate moves along the X direction, it can trigger the first proximity switch (14) at the corresponding position; and / or The Y-axis drive mechanism further includes a second sensing plate (34) and a plurality of second proximity switches (35). The second sensing plate (34) is installed on the execution end of the Y-axis drive assembly (30). The plurality of second proximity switches (35) are spaced apart along the Y direction at the fixed end of the Y-axis drive assembly (30). When the second sensing plate (34) moves along the Y direction, it can trigger the second proximity switch (35) at the corresponding position.

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