Lens optical testing apparatus

Abstract

The utility model discloses a lens optical detection equipment, including workstation and base, is equipped with annular air outlet strip, boss, circular air cavity, annular air cavity, dust suction hole no. The annular air outlet strip is hollow structure, is installed in the base top edge, and the side wall has the air outlet hole of annular distribution, and the boss is located in the base top middle part, and the silica gel pad in its recess is flexible bearing lens, and the circular air cavity is located in the base with annular air cavity, and the annular air cavity surrounds circular air cavity, and is connected dust suction hole no.

Description

Technical Field

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

[0002] In lens optical inspection, high-precision testing of lens surface flatness, light transmittance, and defects is required using optical lenses. The accuracy of the test results directly depends on the cleanliness of the lens surface and the stability of the testing environment. However, in existing testing processes, dust from the external environment easily falls and adheres to the lens surface, creating false defects or obscuring real defects, leading to misjudgments. Some equipment uses protective shield structures to avoid dust interference, but opening and closing the shields is cumbersome, significantly reducing testing efficiency, especially during batch testing. Furthermore, dust can still easily remain inside the shields due to airflow, making it difficult to completely solve the contamination problem.

[0003] Therefore, those skilled in the art have provided a lens optical inspection device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a lens optical inspection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A lens optical inspection device includes a worktable and a base disposed on the top of the worktable, wherein the base is provided with:

[0007] The annular air outlet strip is a hollow structure and is installed on the top edge of the base. Air outlet holes are evenly opened on one side wall along the annular direction.

[0008] The boss is located at the top center of the base, and its top has a groove, in which a silicone pad for flexibly supporting the lens to be tested is placed.

[0009] The circular air cavity and the annular air cavity are respectively opened inside the base, with the annular air cavity surrounding the circular air cavity;

[0010] One or more suction holes are arranged in a ring at the bottom of the groove, penetrating the silicone pad and communicating with the circular air chamber;

[0011] Two suction holes, multiple in number and arranged in a ring at the annular edge of the boss, are connected to the annular air chamber;

[0012] The suction pipe is installed on the side of the base. One end of the pipe is connected to the first and second branch pipes via a connector. The first branch pipe is connected to the annular air chamber, and the second branch pipe is connected to the circular air chamber via a flow-limiting pipe.

[0013] Preferably, the inner diameter of the flow restrictor is smaller than the inner diameter of the second flow divider.

[0014] Preferably, an air inlet pipe is installed on the outer side of the annular air outlet strip, and the air inlet pipe is connected to an external clean air source. The end of the dust suction pipe away from the tap is connected to an external negative pressure suction device.

[0015] Preferably, the cross-section of the annular air outlet strip is a right-angled trapezoid with its inclined surface facing upward, and the air outlet is opened on the inclined surface.

[0016] Preferably, a honeycomb-shaped flow equalization plate matching the shape of each is installed on the inner side of both the circular and annular air chambers.

[0017] Preferably, an L-shaped support plate is installed on the top edge of the workbench, and a light source lens is provided on the L-shaped support plate, with the light source lens located directly above the lens to be tested.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention utilizes the inclined air outlet holes of the annular air outlet strip to form an inwardly converging closed air curtain, effectively preventing external dust from entering the detection area without the need for cumbersome protective cover operations. The circular air chamber and the annular air chamber form a negative pressure gradient with the help of the flow limiting tube, which can powerfully remove micro-dust from the bottom of the lens through the first suction hole and gently remove scattered dust from the surrounding area through the second suction hole, avoiding the problems of incomplete suction or lens deformation caused by a single negative pressure. The silicone pad provides flexible support for the lens, prevents scratches and helps to fix it. Combined with the airflow homogenization effect of the honeycomb flow equalization plate and the precise alignment of the light source lens, the overall cleanliness, stability and efficiency of lens optical inspection are improved. Attached Figure Description

[0020] To illustrate the technical solutions in the embodiments of the present invention or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0021] Figure 1 This is a schematic diagram of the structure of the lens optical testing equipment proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the base proposed in this utility model.

[0023] In the diagram: 1. Workbench; 2. Base; 3. Annular air outlet strip; 31. Air inlet pipe; 32. Air outlet; 4. Boss; 5. Silicone pad; 6. Lens to be tested; 7. Circular air chamber; 71. Dust suction hole one; 8. Annular air chamber; 81. Dust suction hole two; 9. Dust suction pipe; 10. Diverter pipe one; 11. Diverter pipe two; 12. Flow restrictor; 13. Honeycomb flow equalization plate; 14. L-shaped support plate; 15. Light source lens. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figure 1-2 A lens optical inspection device includes a worktable 1 and a base 2 disposed on the top of the worktable 1, the base 2 having:

[0026] The annular air outlet strip 3 is a hollow structure and is installed on the top edge of the base 2. One side wall of the strip has air outlet holes 32 evenly opened along the annular direction.

[0027] The boss 4 is located at the top center of the base 2, and its top is provided with a groove. The groove is provided with a silicone pad 5 for flexibly supporting the lens 6 to be tested.

[0028] A circular air cavity 7 and an annular air cavity 8 are respectively opened inside the base 2, with the annular air cavity 8 surrounding the circular air cavity 7;

[0029] The suction holes 71 are multiple and arranged in a ring at the bottom of the groove, penetrating the silicone pad 5 and communicating with the circular air chamber 7;

[0030] Dust suction holes 81, multiple of which are arranged in a ring at the annular edge of the boss 4, are connected to the annular air chamber 8;

[0031] The suction pipe 9 is installed on the side of the base 2. One end of it is connected to the first diversion pipe 10 and the second diversion pipe 11 through the tap. The first diversion pipe 10 is connected to the annular air chamber 8, and the second diversion pipe 11 is connected to the circular air chamber 7 through the flow limiting pipe 12.

[0032] The annular air outlet 32 ​​of the annular air outlet strip 3 forms a closed air curtain, blocking dust from the external environment from entering the detection area and preventing dust from adhering to the lens and affecting the optical detection accuracy; the circular air chamber 7 forms a high negative pressure through the flow limiting tube 12, which, together with the first dust suction hole 71, accurately adsorbs residual impurities at the bottom of the lens; the annular air chamber 8 forms a low negative pressure, which removes dust scattered around the protrusion 4 through the second dust suction hole 81. The two work together to avoid "insufficient local suction" or "excessive adsorption causing lens deformation"; the silicone pad 5 in the groove of the protrusion 4 achieves flexible contact with the lens, which not only buffers the impact during placement, but also assists in fixing the lens through the friction of the material and the suction effect.

[0033] The inner diameter of the flow restrictor 12 is smaller than the inner diameter of the flow divider 11;

[0034] The inner diameter of the flow restrictor 12 is smaller than that of the flow divider 11, making the negative pressure intensity of the circular air chamber 7 higher than that of the annular air chamber 8, which is suitable for the differentiated needs of "strong suction to remove micro-dust at the bottom of the lens and weak suction to prevent airflow disturbance in the surrounding area".

[0035] An air inlet pipe 31 is installed on the outer side of the annular air outlet strip 3, and the air inlet pipe 31 is connected to an external clean air source. The end of the dust suction pipe 9 away from the tap is connected to an external negative pressure suction device.

[0036] The air inlet pipe 31 is connected to a clean air source to ensure that the air curtain blown out by the annular air outlet strip 3 is free from secondary pollution. The dust suction pipe 9 is connected to an external negative pressure device to provide continuous and stable negative pressure power for the dual air chambers.

[0037] The cross-section of the annular air outlet strip 3 is a right-angled trapezoid with its inclined surface facing upward, and the air outlet 32 ​​is opened on the inclined surface;

[0038] The upward-sloping air outlet 32 ​​causes the air curtain to tilt towards the center of the protrusion (usually tilted 15°-30°), forming an "inward-contracting" airflow barrier to avoid "overflow waste" or "insufficient coverage" when the air curtain is blown out vertically.

[0039] Both the circular air chamber 7 and the annular air chamber 8 are equipped with honeycomb-shaped flow equalization plates 13 that match their shape.

[0040] The nested flow equalization plate 13 eliminates airflow turbulence inside the air chamber, ensuring uniform negative pressure in each suction hole and improving suction consistency.

[0041] An L-shaped support plate 14 is installed on the top edge of the workbench 1. A light source lens 15 is provided on the L-shaped support plate 14, and the light source lens 15 is located directly above the lens 6 to be tested.

[0042] The light source lens 15 is used for lens inspection. Its specific functions and implementation structure are existing mature technologies, so they will not be described in detail and are not shown in the figure.

[0043] Working principle:

[0044] When this equipment is working, an external clean air source is introduced into the annular air outlet strip 32 through the air inlet pipe 31, and the annular air curtain that converges inward is blown out from the inclined air outlet 32 ​​to form a dust barrier; the external negative pressure equipment draws air through the dust suction pipe 9, so that the annular air chamber 8 connected by the first diversion pipe 10 forms a low negative pressure, and the dust around the boss 4 is sucked out through the second dust suction hole 81; the second diversion pipe 11 forms a high negative pressure in the circular air chamber 7 through the flow limiting pipe 12, and the micro dust at the bottom of the lens is powerfully removed through the first dust suction hole 71; the honeycomb flow equalization plate 13 ensures that the negative pressure of the two air chambers is uniform, the silicone pad 5 flexibly supports the lens and is fixed with the help of negative pressure, and the light source lens 15 performs optical inspection on the clean and stable lens.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lens optical inspection device, characterized in that, Includes a workbench (1) and a base (2) disposed on the top of the workbench (1), wherein the base (2) is provided with: The annular air outlet strip (3) is a hollow structure and is installed on the top edge of the base (2). One side wall of the strip is evenly provided with air outlet holes (32) along the annular direction. The boss (4) is located at the top center of the base (2), and its top is provided with a groove. The groove is provided with a silicone pad (5) for flexibly supporting the lens (6) to be tested. A circular air cavity (7) and an annular air cavity (8) are respectively opened inside the base (2), and the annular air cavity (8) is arranged around the circular air cavity (7); A suction hole (71) is provided, and multiple holes are arranged in a ring at the bottom of the groove, penetrating the silicone pad (5) and communicating with the circular air chamber (7); Dust suction holes 2 (81) are multiple and arranged in a ring at the annular edge of the boss (4), and are connected to the annular air chamber (8); The suction pipe (9) is installed on the side of the base (2). One end of the pipe is connected to the first diversion pipe (10) and the second diversion pipe (11) through a tap. The first diversion pipe (10) is connected to the annular air chamber (8), and the second diversion pipe (11) is connected to the circular air chamber (7) through the flow limiting pipe (12).

2. The lens optical inspection device according to claim 1, characterized in that, The inner diameter of the flow restrictor (12) is smaller than the inner diameter of the second flow divider (11).

3. The lens optical inspection device according to claim 1, characterized in that, An air inlet pipe (31) is installed on the outer side of the annular air outlet strip (3), and the air inlet pipe (31) is connected to an external clean air source. The end of the dust suction pipe (9) away from the tap is connected to an external negative pressure suction device.

4. The lens optical inspection device according to claim 1, characterized in that, The cross-section of the annular air outlet strip (3) is a right trapezoid with its inclined surface facing upward, and the air outlet (32) is opened on the inclined surface.

5. The lens optical inspection device according to claim 1, characterized in that, The inner sides of both the circular air cavity (7) and the annular air cavity (8) are equipped with honeycomb-shaped flow equalization plates (13) that match their shape.

6. The lens optical inspection device according to claim 1, characterized in that, An L-shaped support plate (14) is installed on the top edge of the workbench (1). A light source lens (15) is provided on the L-shaped support plate (14), and the light source lens (15) is located directly above the lens (6) to be tested.

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