A glass-plastic composite fixture for adjusting the surface shape of cemented lenses

Abstract

The present invention discloses a glass-plastic composite clamp for regulating the surface shape of a glued lens, which utilizes vacuum negative pressure to completely adsorb the lens onto the ideal surface shape of the glass-plastic composite clamp, thereby regulating the surface shape of the adsorbed lens, and comprises an upper lens clamp and a lower lens clamp; the core advantage of the present invention is that the glass-plastic composite clamp is used to regulate the surface shape of the lens, and the surface shape of the clamp is simple to process and is convenient to clamp and use; connecting vertical plates, connecting horizontal plates and reinforcing ribs are used to fix the upper lens clamp.

Description

Technical Field

[0001] The invention belongs to the field of design and processing, and in particular relates to the design of a glass-plastic composite fixture for regulating the surface shape of a glued lens. Background Art

[0002] The gluing of optical parts refers to the process of bonding the optical surfaces of multiple lenses that match each other through optical glue to form optical parts that meet certain technical requirements. Glued lenses can improve the imaging quality of the optical system, reduce the loss of reflected light between lenses, reduce the difficulty of processing complex optical parts, protect the surface of optical parts, etc. They are widely used in optical microscopes, VR / AR glasses, drone mapping, security monitoring and other fields. When gluing two lenses, the lens clamping methods include gluing, three-claw clamping and vacuum adsorption. The gluing method has complicated gluing and degumming steps, and it is difficult to adjust the concentricity of the two lenses; three-claw clamping can easily cause asymmetric deformation of the lens; vacuum adsorption is convenient to use and is not easy to damage the lens surface.

[0003] Patent CN202410209961.7 discloses a method and system for controlling deformation of double-cemented lenses during photocuring, wherein a lens negative pressure suction cup is disclosed, wherein the lower lens negative pressure suction cup is connected to the upper lens negative pressure suction cup by a positioning pin, the lower lens negative pressure suction cup is used to adsorb the lower lens, and the upper lens negative pressure suction cup is used to adsorb the upper lens; the lower lens negative pressure suction cup and the upper lens negative pressure suction cup use an air pump to extract the gas in the internal cavity of the suction cup through the vacuum holes of the negative pressure suction cup to form a negative pressure zone, and absorb the lens plane in the lens adsorption area to achieve the purpose of uniform distribution and low-force fixing of the lens; however, the negative pressure suction cup used in the patent adsorbs the edge of the lens, which only achieves the purpose of fixing the lens. The patent mainly proposes a method for controlling the ultraviolet light curing process of the lens using an electric variable aperture diaphragm, so as to reduce the lens deformation caused by curing stress, and does not consider the curing deformation caused by the difference between the initial surface shape of the lens and the ideal surface shape. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the present invention discloses a glass-plastic composite fixture for regulating the surface shape of a glued lens. On the basis of realizing the fixing of the lens, the present invention proposes a method of using a glass-plastic composite fixture with an ideal surface shape to regulate the surface shape of the lens, thereby achieving the purpose of actively adjusting the surface shape of the lens; thereby reducing the deformation of the lens caused during the curing process, which is of great significance for improving the curing effect.

[0005] In order to solve the technical problems existing in the prior art, the technical solution adopted by the present invention is as follows:

[0006] A glass-plastic composite fixture for adjusting the surface shape of a cemented lens, comprising an upper lens fixture and a lower lens fixture;

[0007] The upper lens fixture comprises a first base, a first mounting tube, a first standard lens, a plane lens, and a first quartz glass;

[0008] The center position of the first base is a through hole, and a first quartz glass is arranged in the through hole. The first mounting tube is placed on the top surface of the first base and connected together by a connecting piece. The upper lens, the first standard lens, and the plane lens are installed in the first mounting tube from top to bottom in sequence; the bottom of the first mounting tube is placed on the quartz glass, and the quartz glass, the side wall of the first mounting tube and the plane lens form a negative pressure chamber; an exhaust hole is arranged on the side wall of the negative pressure chamber, and the first standard lens and the plane lens are bonded by UV glue; a through hole of the same diameter is processed at the same position of the first standard lens and the plane lens, and the through hole connects the negative pressure chamber and the adsorption surface of the upper lens; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure chamber, so that the upper lens is completely adsorbed on the surface of the first standard lens, thereby achieving the purpose of fixing the upper lens and adjusting the lens surface shape;

[0009] The lower lens fixture comprises a second base, a second mounting tube, a second standard lens, a plano-concave lens, and a second quartz glass;

[0010] The center position of the second base is a through hole, and a second quartz glass is arranged in the through hole. The second mounting tube is placed on the top surface of the second base and connected together by a connecting piece. The lower lens, the second standard lens, and the plano-concave lens are installed in the second mounting tube from top to bottom in sequence; the bottom of the second mounting tube is placed on the second quartz glass, and the second quartz glass, the side wall of the second mounting tube and the plano-concave lens form a negative pressure chamber; an exhaust hole is arranged on the side wall of the negative pressure chamber, and the second standard lens and the plane lens are bonded by UV glue; a through hole of the same diameter is processed at the same position of the second standard lens and the plane lens, and the through hole connects the negative pressure chamber and the adsorption surface of the lower lens; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure chamber, so that the lower lens is completely adsorbed on the surface of the standard lens, thereby achieving the purpose of fixing the lower lens and adjusting the surface shape of the lower lens;

[0011] As a further technical solution, the first mounting cylinder includes a cylindrical hollow disk, an upper flange located at the top of the cylindrical hollow disk, and a lower flange located at the bottom of the cylindrical hollow disk.

[0012] As a further technical solution, the first standard mirror is made of acrylic.

[0013] As a further technical solution, the first plane lens is made of quartz glass.

[0014] As a further technical solution, the adsorption surface of the first standard mirror is consistent with the standard surface shape of the adsorbed surface of the upper lens, and the non-adsorption surface of the first standard mirror is a plane, which is glued together with the plane lens.

[0015] As a further technical solution, the second mounting cylinder includes a cylindrical hollow disk, an upper flange located at the top of the cylindrical hollow disk, and a lower flange located at the bottom of the cylindrical hollow disk.

[0016] As a further technical solution, the second standard mirror is made of acrylic.

[0017] As a further technical solution, the plano-concave lens is made of quartz glass.

[0018] As a further technical solution, the adsorption surface of the second standard mirror is consistent with the adsorbed surface of the lower lens, and the non-adsorption surface of the second standard mirror is consistent with the spherical surface closest to the adsorbed surface of the lower lens.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. On the basis of achieving fixed lens, the present invention proposes a method of using an ideal surface shape suction cup to control the lens surface shape, so as to achieve the purpose of actively adjusting the lens surface shape.

[0021] 2. The fixture used in the present invention is a glass-plastic composite fixture. Taking aspheric lenses as an example, the standard mirror material used in the present invention is acrylic, and the plane lens and plano-concave lens are made of quartz glass. Because the present invention needs to process the standard mirror so that the upper surface of the standard mirror is consistent with the standard surface shape of the lens adsorbed surface, glass has high strength and small deformation, and is suitable for the support structure of the fixture. However, it is difficult to process aspheric surfaces on glass surfaces; it is relatively easy to process aspheric surfaces on plastic surfaces. Acrylic materials not only meet the processing requirements, but also meet the conditions for light transmission during the lens gluing process. Therefore, the glass-plastic composite method is used, and the standard mirror material is selected as colorless and transparent acrylic.

[0022] 3. The present invention takes an aspherical lens as an example. Unlike the upper lens, the lower lens is a concave structure. If the bottom of the standard lens of the lower lens is a plane, the thickness at the center of the standard lens will be the smallest, and large deformation will easily occur during processing and negative pressure adsorption. Therefore, in the present invention, the bottom of the standard lens is designed to be a spherical surface that is closest to the adsorbed surface of the lower lens, so that the thickness of the standard lens is basically consistent along the normal direction, reducing deformation caused by uneven thickness, and the difficulty of spherical surface processing is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 Schematic diagram of the principle of the negative pressure suction cup for regulating the lens surface shape proposed by the present invention;

[0025] Figure 2The general assembly drawing of the clamp of the present invention;

[0026] Figure 3 is a top view of the upper lens fixture of the present invention;

[0027] Figure 4 is a cross-sectional view of an upper lens fixture of the present invention;

[0028] Figure 5 is a top view of the lower lens fixture of the present invention;

[0029] Figure 6 is a cross-sectional view of the lower lens fixture of the present invention;

[0030] Figure 7 It is a schematic diagram of the lower lens fixture standard mirror of the present invention;

[0031] Figure 8 It is a schematic diagram of the shape change of the lens of the present invention before and after bonding and curing.

[0032] In the figure:

[0033] 1. Upper lens fixture; 2. Upper lens fixture; 3. Connecting vertical plate; 4. Connecting horizontal plate; 5. Reinforcing rib plate; 6. Upper lens exhaust hole; 7. Lower lens exhaust hole;

[0034] 11. Upper lens; 12. Standard lens; 13. Plane lens; 14. Mounting tube; 15. Quartz glass; 16. Base; 110. Negative pressure chamber;

[0035] 21. Lower lens; 22. Standard mirror; 23. Plano-concave lens; 24. Mounting tube; 25. Quartz glass; 26. Base; 210. Negative pressure chamber. DETAILED DESCRIPTION

[0036] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0038] For the convenience of description, if the words "upper" and "lower" appear in the present invention, they only indicate that they are consistent with the upper and lower directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0039] This embodiment proposes a glass-plastic composite fixture for adjusting the surface shape of a cemented lens. The lens is completely adsorbed onto the composite fixture with an ideal surface shape by vacuum adsorption, so as to adjust the surface shape of the lens. The principle diagram is shown in FIG. Figure 1 As shown, A1 is the non-adsorption surface (not ventilated), A2 is the non-adsorption surface after negative pressure absorption, B1 is the adsorption surface (not ventilated), B2 is the adsorption surface after negative pressure absorption, and S is the suction cup surface.

[0040] The core advantage of the present invention is that the glass-plastic composite fixture is used to control the surface shape of the lens, and the fixture surface shape is simple to process and is convenient to clamp and use. The overall assembly diagram of the invention is as follows: Figure 2 As shown, the connecting vertical plates, connecting horizontal plates and reinforcing ribs are used to fix the upper lens fixture.

[0041] The upper lens fixture disclosed in this embodiment is designed as follows Figure 3 , Figure 4 As shown, from top to bottom, they are upper lens 11; standard lens 12; plane lens 13; mounting tube 14; quartz glass 15; base 16; negative pressure chamber 110;

[0042] A groove is provided at the center of the base 16, and a quartz glass 15 is provided in the groove, and the highest surface of the quartz glass 15 is flush with the highest surface of the top of the base 16;

[0043] The mounting tube 14 is placed on the top surface of the base 16 and connected together by a connecting piece. The mounting tube 14 includes a cylindrical hollow disk, an upper flange located on the top of the cylindrical hollow disk and a lower flange located at the bottom of the cylindrical hollow disk, and the upper lens 11, the standard lens, and the plane lens are installed in sequence from the top of the cylindrical hollow disk to the bottom; the bottom of the cylindrical hollow disk is placed on the quartz glass, and the quartz glass 15, the side wall of the cylindrical hollow disk and the plane lens 13 form a negative pressure chamber 110; on the side of the negative pressure chamber 110 An exhaust hole is arranged on the wall; UV glue is used to bond the standard mirror 12 and the plane lens 13; the standard mirror is processed by an ultra-precision lathe to make the standard mirror 12 and the adsorbed surface of the upper lens have the same surface shape, and through holes with the same diameter are processed at the same position on the standard mirror 12 and the plane lens 13; the through hole connects the negative pressure chamber and the adsorption surface of the upper lens 11; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure chamber 110, so that the lens is completely adsorbed on the surface of the standard mirror 12, thereby achieving the purpose of fixing the lens and adjusting the surface shape of the upper lens 11.

[0044] Glass is suitable for the support structure of the fixture due to its high strength and small deformation. However, it is difficult to process aspheric surfaces on glass surfaces. It is relatively easy to process aspheric surfaces on plastic surfaces. Acrylic materials can meet the processing requirements and also meet the light transmission conditions required for the lens bonding process. Therefore, the present invention proposes a glass-plastic composite method, where the standard lens material is colorless and transparent acrylic, and the plane lens material is quartz glass.

[0045] As a further technical solution, the adsorption surface of the standard mirror 12 is consistent with the surface shape of the adsorbed surface of the standard upper lens. Taking the aspherical lens as an example, the surface shape of the adsorption surface of the upper lens is close to a plane. Therefore, the non-adsorption surface of the standard mirror 12 is designed to be a plane for easy processing and bonding with the plane lens.

[0046] Furthermore, when the upper and lower lenses are glued together, the adhesive needs to be cured by ultraviolet light, and transparent quartz glass is used at the bottom of the fixture to achieve sealing and ultraviolet transmittance at the same time.

[0047] The lower lens fixture in this embodiment is designed as follows Figure 5 , Figure 6 As shown in the figure, from top to bottom, they are a lower lens 21, a standard lens 22, a plano-concave lens 23, a mounting tube 24, a quartz glass 25, and a base 26. Different from the upper lens, the lower lens is a concave structure. If the bottom of the standard lens is a plane, the thickness at the center of the standard lens will be the smallest, and large deformation will easily occur during processing and negative pressure adsorption, such as Figure 7 As shown, in the present invention, the bottom of the standard mirror 22 is designed to be a spherical surface that is closest to the standard surface shape of the adsorbed surface of the lower lens, so that the thickness of the standard mirror is basically consistent along the normal direction, and the spherical surface is easier to process. The most ideal form is to design it as a non-spherical surface that is the same as the adsorbed surface of the lower lens, but it is not easy to process; correspondingly, UV glue is used to bond the plano-concave lens and the standard mirror. That is, the adsorbed surface of the standard mirror 22 is consistent with the standard surface shape of the adsorbed surface of the lower lens 21, and the non-adsorbed surface of the standard mirror 22 is consistent with the spherical surface shape that is closest to the adsorbed surface shape of the lower lens 21.

[0048] Specifically, a groove is provided at the center of the base 26, and a quartz glass 25 is provided in the groove, and the highest surface of the quartz glass 25 is flush with the highest surface of the top of the base 26; the installation tube is placed on the top surface of the base 26, and connected together by a connecting piece, and the installation tube includes a cylindrical hollow disk, an upper flange located at the top of the cylindrical hollow disk, and a lower flange located at the bottom of the cylindrical hollow disk, and the lower lens 21, the standard lens 22, and the plano-concave lens 23 are installed in sequence from the top of the cylindrical hollow disk to the bottom; the bottom of the cylindrical hollow disk is placed on the quartz glass 25, and the quartz glass, ... plano-concave lens 23 are installed in sequence from the top of the cylindrical hollow disk to the bottom of the cylindrical hollow disk. The side wall of the disk and the plane lens form a negative pressure cavity; an exhaust hole is set on the side wall of the negative pressure cavity 210; the standard mirror 22 and the plano-concave lens 23 are bonded by UV glue; the standard mirror 22 is processed by an ultra-precision lathe to make the standard mirror 22 and the adsorbed surface of the lower lens consistent, and through holes of the same diameter are processed at the same position on the standard mirror 22 and the plano-concave lens 23; the through hole connects the negative pressure chamber 210 and the adsorption surface of the lower lens 21; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure cavity, so that the lower lens 21 is completely adsorbed on the surface of the standard mirror, thereby achieving the purpose of fixing the lower lens and adjusting the surface shape of the lower lens.

[0049] In order to verify the method of using the ideal surface shape fixture to control the surface shape of the lens proposed in the present invention, the fixture was used to conduct UV curing experiments, and the surface shape changes of the lens before and after curing were measured by a contact profilometer. A total of six groups were cured. The surface shape changes of the lens before and after curing were all within 1μm. Figure 8 As shown, the fixture design proposed by the present invention can adjust the surface shape of the lens, reduce the deformation of the lens caused by the curing process, and provide an effective design solution for improving the curing effect of the lens.

Claims

1. A glass-plastic composite fixture for adjusting the surface shape of a cemented lens, characterized in that: It comprises an upper lens fixture and a lower lens fixture, wherein the upper lens fixture comprises a first base, a first mounting tube, a first standard mirror, a plane lens, and a first quartz glass; the center position of the first base is a through hole, and the first quartz glass is arranged in the through hole; the first mounting tube is placed on the top surface of the first base, and connected together by a connecting piece; the upper lens, the first standard mirror, and the plane lens are sequentially installed in the first mounting tube from top to bottom; the bottom of the first mounting tube is placed on the quartz glass, and the quartz glass, the side wall of the first mounting tube and the plane lens form a negative pressure chamber; an exhaust hole is arranged on the side wall of the negative pressure chamber, and the first standard mirror and the plane lens are bonded by UV glue; a through hole of the same diameter is processed at the same position of the first standard mirror and the plane lens, and the through hole connects the negative pressure chamber and the adsorption surface of the upper lens; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure chamber, so that the upper lens is completely adsorbed on the surface of the first standard mirror, thereby achieving the purpose of fixing the upper lens and adjusting the lens surface shape; The lower lens fixture comprises a second base, a second mounting tube, a second standard mirror, a plano-concave lens, and a second quartz glass; the center position of the second base is a through hole, and the second quartz glass is arranged in the through hole, the second mounting tube is placed on the top surface of the second base, connected together by a connecting piece, and the lower lens, the second standard mirror, and the plano-concave lens are installed in the second mounting tube from top to bottom in sequence; the bottom of the second mounting tube is placed on the second quartz glass, and the second quartz glass, the side wall of the second mounting tube and the plano-concave lens form a negative pressure chamber; an exhaust hole is arranged on the side wall of the negative pressure chamber, and the second standard mirror and the plane lens are bonded together; a through hole of the same diameter is processed at the same position of the second standard mirror and the plane lens, and the through hole connects the negative pressure chamber and the adsorption surface of the lower lens; the gas inside the fixture is extracted through the negative pressure exhaust hole to form a negative pressure chamber, so that the lower lens is completely adsorbed on the surface of the standard mirror, thereby achieving the purpose of fixing the lower lens and adjusting the surface shape of the lower lens.

2. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The first mounting cylinder comprises a cylindrical hollow disk, an upper flange located at the top of the cylindrical hollow disk and a lower flange located at the bottom of the cylindrical hollow disk.

3. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The first standard mirror is made of acrylic.

4. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The first plane lens is made of quartz glass.

5. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The adsorption surface of the first standard mirror is consistent with the surface shape of the adsorbed surface of the standard upper lens, and the non-adsorption surface of the first standard mirror is a plane, which is glued together with the plane lens.

6. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The second mounting cylinder includes a cylindrical hollow disk, an upper flange located at the top of the cylindrical hollow disk, and a lower flange located at the bottom of the cylindrical hollow disk.

7. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The second standard mirror is made of acrylic.

8. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The material of the plano-concave lens is quartz glass.

9. The glass-plastic composite fixture for adjusting the surface shape of a cemented lens as claimed in claim 1, characterized in that: The adsorption surface of the second standard mirror is consistent with the adsorbed surface of the lower lens; the non-adsorption surface of the second standard mirror is consistent with the spherical surface closest to the adsorbed surface of the lower lens.

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