Lens testing apparatus

Abstract

The utility model belongs to the technical field of lens testing, disclose a lens testing equipment, including support frame, light pipe subassembly and heat preservation box, heat preservation box places in support frame, is used for placing lens, and can change the environmental temperature of lens, light pipe subassembly displacement is adjustably set up in support frame, and is located heat preservation box along the top of first direction, and light pipe subassembly can move towards or away from heat preservation box, light pipe subassembly is used for emitting light and irradiating in lens place. The utility model changes the environmental temperature of lens through heat preservation box, in order to observe the fluctuation of lens SFR parameter under different temperature, and then confirms the stability of imaging of lens under different temperature, to improve the quality of lens.

Description

Technical Field

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

[0002] Currently, spatial frequency response (SFR) testing of lenses has become a core technology for evaluating the resolving power of imaging systems. Its applications extend beyond optical design to include industrial manufacturing, consumer electronics, and scientific research. Particularly in the development of optical lenses, SFR testing is used to verify whether the lens's optical design meets the expected resolving power targets. Furthermore, during mass production, the SFR parameters of lenses of the same model need to be controlled within ±5% to ensure stable image quality across batches and meet market demands. However, how to detect fluctuations in the lens's SFR parameters by changing the ambient temperature during lens testing, and thus confirm the differences in image stability at different temperatures, remains a problem that researchers in this field need to solve. Utility Model Content

[0003] The purpose of this invention is to provide a lens testing device that can detect the fluctuation effect of the lens's SFR parameters by changing the ambient temperature of the lens, thereby confirming the difference in the stability of the lens's imaging at different temperatures.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Lens testing equipment, including:

[0006] The device includes a support frame, a light tube assembly, and an insulation box. The insulation box is placed on the support frame for holding a lens and is capable of changing the ambient temperature of the lens. The light tube assembly is adjustablely positioned on the support frame and located above the insulation box along a first direction. The light tube assembly is capable of moving toward or away from the insulation box and is used to emit light and illuminate the lens.

[0007] Optionally, it also includes a displacement module to which the optical tube assembly is connected to be able to move upward in a second direction and a third direction, wherein each of the first direction, the second direction and the third direction is arranged at an angle to the other two.

[0008] Optionally, the light tube assembly includes a support component, multiple slide rails, and multiple light tubes. One side of the support component is connected to the displacement module, and multiple slide rails are circumferentially arranged on the other side. At least one light tube is slidably arranged on each slide rail, and the light emitted by the multiple light tubes can be focused on the lens.

[0009] Optionally, the light tube is also disposed at the center of the support component along the first direction.

[0010] Alternatively, the slide rail may be configured as an arc-shaped structure, and the arc of multiple slide rails may be the same.

[0011] Optionally, the optical tube assembly further includes a connector sleeved on the outside of the optical tube, and the connector 55 has a protrusion on the side facing the slide rail, and the slide rail has a limiting groove on the side facing the optical tube, with the protrusion being limited and slidably disposed in the limiting groove.

[0012] Optionally, a scale line is provided on the side of the slide rail facing the light tube, and the scale line extends along the extension direction of the slide rail.

[0013] Optionally, the insulated box is provided with an inner cavity for placing the lens. The inner cavity is connected to a first pipe and a second pipe, which are respectively used to connect to constant temperature chambers with different temperatures and can deliver cold and hot gases to the inner cavity to change the ambient temperature of the lens.

[0014] Optionally, the insulated box is provided with a receiving slot and a transparent plate. The receiving slot is connected to the inner cavity and is used to place the transparent plate. The light emitted by the light tube assembly passes through the transparent plate and illuminates the lens.

[0015] Optionally, the support frame includes a support platform, multiple columns and a top plate, the multiple columns are arranged along the first direction and are vertically connected to the top plate and the support platform at their upper and lower ends respectively, the light tube assembly is adjustablely arranged on the top plate, and the heat preservation box is located on the support platform.

[0016] The beneficial effects of this utility model are:

[0017] In this invention, the support frame effectively ensures the stable installation of the light tube assembly and the insulation box. The lens is placed inside the insulation box, and the ambient temperature of the lens is varied by the insulation box. This not only ensures the stability of the lens during testing but also allows for temperature regulation, enabling observation of fluctuations in the lens's SFR parameters at different temperatures. This confirms the stability of the lens's imaging at different temperatures, thereby improving lens quality. Simultaneously, the light tube assembly is adjustable on the support frame and can move towards or away from the insulation box to emit light and illuminate the lens, ensuring effective illumination of the lens during testing and guaranteeing testing accuracy. Attached Figure Description

[0018] Figure 1 This is a first isometric schematic diagram of the lens testing equipment described in this embodiment of the present invention;

[0019] Figure 2This is a second isometric schematic diagram of the lens testing device described in this embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the displacement module in the lens testing equipment described in this embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the optical tube assembly in the lens testing equipment described in this embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the slide rail structure in the lens testing device described in this embodiment of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the optical tube and connector in the lens testing equipment described in this embodiment of the utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the heat preservation box in the lens testing equipment described in this embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the structure of the hidden door of the insulated box in the lens testing equipment described in this embodiment of the utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the heat preservation box in the lens testing equipment described in this embodiment of the utility model.

[0027] In the picture:

[0028] 10-Support platform; 20-Column; 30-Top plate; 40-Displacement module; 50-Light tube assembly; 60-Insulation box;

[0029] 41-First displacement component; 42-Second displacement component;

[0030] 51-Connecting plate; 52-Connecting column; 53-Supporting plate; 54-Slide rail; 541-Limiting groove; 542-Through hole; 543-Scale line; 55-Connector; 551-Protrusion; 56-Light tube;

[0031] 61-Box body; 62-Door body; 621-Locking structure; 63-First pipeline; 64-Second pipeline; 65-Transparent plate; 601-Inner cavity; 602-Connecting groove; 603-Accommodation groove. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] 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 or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or 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 according to the specific circumstances.

[0034] In the description of this utility model, unless otherwise expressly 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.

[0035] The technical solution of this embodiment will be further described below with reference to the accompanying drawings and specific implementation methods.

[0036] like Figures 1 to 9As shown, this embodiment provides a lens testing device, including a support frame, a displacement module 40, a light tube assembly 50, and an insulation box 60. The support frame includes a support platform 10, columns 20, and a top plate 30. Specifically, multiple columns 20 are provided, all arranged along a first direction. The upper and lower ends of the multiple columns 20 are vertically connected to the top plate 30 and the support platform 10, respectively. The displacement module 40 is connected to the side of the top plate 30 facing the support platform 10. The light tube assembly 50 is connected to the displacement module 40 and can be adjusted in position on the support frame under the action of the displacement module 40. Furthermore, the insulated chamber 60 is located on the support platform 10 and is used to place the lens. It can also change the ambient temperature of the lens, facilitating temperature control during lens testing. Simultaneously, the light pipe assembly 50 is located above the insulated chamber 60 along the first direction, and the light pipe assembly 50 can face or move away from the insulated chamber 60, emitting light and illuminating the lens. This provides effective parallel light to the lens through the light pipe assembly 50. Combined with the insulated chamber 60's ability to change the ambient temperature around the lens, it enables testing of the lens in different temperature environments to assess its performance. Accordingly, the lens testing equipment in this embodiment can test the changes in SFR parameters at the center and periphery of the lens to confirm the stability of the lens's imaging system.

[0037] Optionally, in this embodiment, the optical tube assembly 50 can move upwards in the second and third directions under the action of the displacement module 40, and the first, second, and third directions are arranged at angles to each other, thereby facilitating the adjustment of the position of the optical tube assembly 50 to adjust the emitted light path. Figure 1 As shown, in this embodiment, the height direction of the support frame is set as the first direction, the length direction of the support frame is set as the second direction, and the width direction is set as the third direction, and each of the first direction, the second direction and the third direction is perpendicular to each other.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, the support platform 10 has a rectangular surface, and the top plate 30 is also rectangular. Therefore, four columns 20 are provided, and each column 20 is connected to a apex corner of the top plate 30. Furthermore, the area of ​​the top plate 30 is smaller than the area of ​​the support platform 10 to ensure stable support of the insulation box 60.

[0039] like Figure 3As shown, in this embodiment, the displacement module 40 includes a first displacement component 41 and a second displacement component 42. Specifically, the first displacement component 41 extends along a second direction and is slidably disposed on the second displacement component 42 along a third direction. The second displacement component 42 extends along a third direction, and the side of the second displacement component 42 facing away from the first displacement component 41 is fixed to the top plate 30. Further, the top of the light tube assembly 50 is slidably disposed on the first displacement component 41 along the second direction, thereby enabling the light tube assembly 50 to move as a whole in the second direction and the third direction under the action of the first displacement component 41 and the second displacement component 42.

[0040] like Figures 3-6 As shown, in this embodiment, the optical tube assembly 50 includes a support assembly, multiple slide rails 54, connectors 55, and multiple optical tubes 56. The support assembly includes a connecting plate 51, connecting posts 52, and a support plate 53. Specifically, multiple connecting posts 52 are provided, all arranged along a first direction, and the two ends of the connecting posts 52 are perpendicularly connected to the connecting plate 51 and the support plate 53, respectively. Specifically, in this embodiment, both the connecting plate 51 and the support plate 53 are configured as square structures, and four connecting posts 52 are provided, all located at the top corners of the connecting plate 51 and the support plate 53. Optionally, the connecting plate 51 is slidably mounted on the first displacement assembly 41, and the support plate 53 is circumferentially provided with multiple slide rails 54. At least one optical tube 56 is slidably mounted on each slide rail 54, and the optical tube 56 is slidably mounted on the slide rail 54 via the connectors 55. The light emitted by multiple light tubes 56 can be focused at the lens, and thus the position of the light emitted by the light tubes 56 can be changed by changing the position of the connector 55 on the slide rail 54.

[0041] Specifically, in this embodiment, four slide rails 54 are provided, all located at the four apex corners of the support plate 53 on the side opposite to the connecting column 52. Specifically, in this embodiment, the slide rails 54 are designed with an arc shape, and the curvature of the multiple slide rails 54 is the same, thus ensuring that the centers of the slide rails 54 coincide. This allows the light tubes 56 to be focused on the same point when adjusting their positions, thereby ensuring that the optical path is focused on the lens and guaranteeing testing accuracy. Furthermore, in this embodiment, a light tube 56 is also provided at the center of the support assembly, that is, at the center of the support plate 53. Thus, the four circumferential light tubes 56 and the central light tube 56 effectively ensure that the optical path of the lens meets the testing requirements during the testing process.

[0042] like Figure 5 and Figure 6As shown, in this embodiment, the connector 55 is sleeved on the outside of the optical tube 56, and a protrusion 551 is provided on the side of the connector 55 facing the slide rail 54. A limiting groove 541 is provided on the side of the slide rail 54 facing the optical tube 56. The protrusion 551 is limited and slidably disposed in the limiting groove 541, thereby ensuring that the optical tube 56 can move closer to or further away from the lens in the first direction and will not fall off during the adjustment process. Specifically, a scale line 543 is provided on the side of the slide rail 54 facing the optical tube 56, so that the adjustment position can be recorded during adjustment, improving testing efficiency and testing accuracy. Optionally, the scale line 543 extends along the extension direction of the slide rail 54, so that the movement position of the optical tube 56 can be recorded. Correspondingly, a through hole 542 is provided in the bottom of the limiting groove 541 along the thickness direction of the slide rail 54 to ensure that the connector 55 reduces resistance during sliding and improves adjustment efficiency.

[0043] like Figures 7-9 As shown, in this embodiment, the insulated box 60 includes a box body 61, a door 62, a first pipe 63, a second pipe 64, and a transparent plate 65. A locking structure 621 is provided between the door 62 and the box body 61 to lock them together. The box body 61 is provided with an inner cavity 601, a connecting groove 602, and a receiving groove 603. Specifically, the first pipe 63 and the second pipe 64 are respectively connected to the two sides of the inner cavity 601 of the box body 61, and both the first pipe 63 and the second pipe 64 are connected to the inner cavity 601. The inner cavity 601 is used to place the lens. Thus, the first pipe 63 and the second pipe 64 are respectively used to connect to constant temperature chambers with different temperatures, so that cold and hot gases can be delivered to the inner cavity 601 respectively, thereby changing the ambient temperature of the lens and enabling the lens to be tested under different ambient temperatures.

[0044] Furthermore, the inner cavity 601 is connected to a connecting groove 602 at its top along the first direction, and the connecting groove 602 is connected to the receiving groove 603 at its top along the first direction, thereby achieving mutual communication between the inner cavity 601 and the receiving groove 603. Specifically, the opening of the receiving groove 603 is arranged facing upward along the first direction for placing the transparent plate 65, and a step is provided on the side of the receiving groove 603 near the connecting groove 602, limiting the transparent plate 65 to the step to ensure stable installation of the transparent plate 65. At the same time, the light emitted by each light tube 56 in the light tube assembly 50 can pass through the transparent plate 65 and illuminate the transparent plate 65, providing optical path illumination for the lens. Exemplarily, in this embodiment, the outer walls of the receiving groove 603, the connecting groove 602, and the inner cavity 601 are all spaced apart from the inner wall of the housing 61 to ensure the stability of the ambient temperature of the lens through the air cavity.

[0045] Optionally, in this embodiment, one end of the door 62 along the second direction is rotatably connected to the housing 61 via a hinge, and the other end is locked or unlocked to the housing 61 via a locking structure 621, thereby enabling the inner cavity 601 to communicate with the external environment by opening and closing the door 62. For example, the constant temperature chambers connected to both sides of the insulation box 60 have temperatures of 80°C (high temperature) and -40°C (low temperature), respectively. Further, in this embodiment, the relevant components used to test the changes in SFR parameters at the center and around the lens, and their installation positions, can be set according to actual needs, and will not be elaborated here.

[0046] 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 other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations 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 testing device, characterized in that, include: The device includes a support frame, a light tube assembly (50), and a heat preservation box (60). The heat preservation box (60) is placed on the support frame and is used to place the lens and change the ambient temperature of the lens. The light tube assembly (50) is adjustablely disposed on the support frame and is located above the heat preservation box (60) along a first direction. The light tube assembly (50) can move toward or away from the heat preservation box (60). The light tube assembly (50) is used to emit light and illuminate the lens.

2. The lens testing equipment according to claim 1, characterized in that, It also includes a displacement module (40), to which the optical tube assembly (50) is connected to the displacement module (40) to be able to move upward in a second direction and a third direction, wherein the first direction, the second direction and the third direction are arranged at an angle to each other.

3. The lens testing equipment according to claim 2, characterized in that, The light tube assembly (50) includes a support assembly, multiple slide rails (54) and multiple light tubes (56). One side of the support assembly is connected to the displacement module (40), and multiple slide rails (54) are arranged circumferentially on the other side. At least one light tube (56) is slidably arranged on each slide rail (54), and the light path emitted by the multiple light tubes (56) can be focused on the lens.

4. The lens testing device according to claim 3, characterized in that, The light tube (56) is also provided at the center of the support component along the first direction.

5. The lens testing device according to claim 3, characterized in that, The slide rail (54) is configured as an arc-shaped structure, and the arc of multiple slide rails (54) is the same.

6. The lens testing device according to claim 3, characterized in that, The optical tube assembly (50) further includes a connector (55), which is sleeved on the outside of the optical tube (56). The connector (55) has a protrusion (551) on the side facing the slide rail (54), and the slide rail (54) has a limiting groove (541) on the side facing the optical tube (56). The protrusion (551) is limited and slidably disposed in the limiting groove (541).

7. The lens testing device according to claim 3, characterized in that, The slide rail (54) has a scale line (543) on the side facing the light tube (56), and the scale line (543) extends along the extension direction of the slide rail (54).

8. The lens testing device according to claim 1, characterized in that, The insulated box (60) is provided with an inner cavity (601) for placing the lens. The inner cavity (601) is connected to a first pipe (63) and a second pipe (64). The first pipe (63) and the second pipe (64) are respectively used to connect to constant temperature chambers with different temperatures, and can respectively deliver cold and hot gases to the inner cavity (601) to change the ambient temperature of the lens.

9. The lens testing device according to claim 8, characterized in that, The heat preservation box (60) is provided with a receiving groove (603) and a transparent plate (65). The receiving groove (603) is connected to the inner cavity (601) and is used to place the transparent plate (65). The light emitted by the light tube assembly (50) passes through the transparent plate (65) and illuminates the lens.

10. The lens testing apparatus according to any one of claims 1-9, characterized in that, The support frame includes a support platform (10), multiple columns (20) and a top plate (30). The multiple columns (20) are arranged along the first direction and are vertically connected to the top plate (30) and the support platform (10) at their upper and lower ends, respectively. The light tube assembly (50) is tunably arranged on the top plate (30), and the heat preservation box (60) is located on the support platform (10).

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