Cylindrical lens high-precision machining jig

Abstract

The utility model discloses a cylindrical lens high-precision processing jig, which comprises a mounting bottom plate, a cylindrical lens, a clamping plate, a clamping plate, a clamping plate and a clamping plate, wherein a mounting plane is formed on the upper surface of the mounting bottom plate; the positioning clamp is provided with a first attaching face and a second attaching face which are perpendicular to each other, a positioning notch is formed in the side, opposite to the first attaching face, of the positioning clamp, the positioning notch is matched with the cylindrical face of a to-be-machined lens, and the cylindrical face of the to-be-machined lens is fixed to the positioning notch in an adhesive mode; the first attaching face and the second attaching face are both used for optical cement to the attaching plane. The whole operation process is simpler and more convenient, the requirement for the operation skill is low, the time for loading and unloading the disc can be saved, the machining efficiency is improved, the consistency can be greatly improved, and the compact disc machining is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of lens processing, in particular to a high-precision processing fixture for a cylindrical lens. Background Art

[0002] Cylindrical lenses play an important role in the control and shaping of laser beams. For example, they can be used for laser sheet forming and circularizing elliptical beams, or for adjusting the image height size and correcting astigmatism in an imaging system. They are widely used in movie projection and playback systems, facsimile machines, and scanning imaging systems for printing and typesetting; in-vehicle video systems in the automotive field; linear detector illumination, barcode scanning, holographic illumination, optical information processing, computers, laser emission, and other fields. As the application range of cylindrical lenses becomes wider and wider, the requirements for the eccentricity or axial edge distance of cylindrical lenses are also getting higher and higher, especially in high-precision test instruments and devices such as cavity wafers of high-power laser resonators and long-distance linear interferometers.

[0003] Currently, in the manufacturing methods of optical components, there are generally two methods for correcting the eccentricity or axial edge distance of cylindrical lenses:

[0004] Method 1: Control the edge thickness difference on both sides of the cylindrical lens. By manually adjusting the force application points or opening offset holes on the fixture to control the edge thickness difference, this method is not conducive to improving the processing efficiency, has high requirements for the skills of operators, and is costly. It is only applicable to single-piece processing.

[0005] Method 2: Correct the side perpendicularity and dimensions of both sides of the lens. The component is first mounted on the grinding plate to grind the plane, as Figure 1 shown; after the grinding process is completed and the component is removed from the grinding plate, the component is optically cemented and fixed to a 90° support body, and then optically cemented to the bottom plate, and the side is ground, as Figure 2 shown. This method is not conducive to improving the lens quality, has high requirements for the optical cementing skills, and is likely to cause large differences in the axial edge distance, making it difficult to process in batches. Content of the Utility Model

[0006] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a high-precision processing fixture for a cylindrical lens, which has the advantages of convenient processing, high efficiency, and improved axial edge distance consistency.

[0007] The purpose of the utility model is achieved by adopting the following technical solutions:

[0008] According to an embodiment of the present disclosure, a high-precision processing fixture for a cylindrical lens is provided, including:

[0009] A mounting base plate, on the upper surface of which a mounting plane is formed;

[0010] Positioning fixture, the positioning fixture has a first abutting surface and a second abutting surface perpendicular to each other. A positioning notch is provided on one side of the positioning fixture opposite to the first abutting surface. The positioning notch is adapted to the cylindrical surface of the lens to be processed, and the cylindrical surface of the lens to be processed is adhesively fixed to the positioning notch;

[0011] Both the first abutting surface and the second abutting surface are used for optical bonding to the mounting plane. When the first abutting surface is optically bonded to the mounting plane, the axis of the lens to be processed is perpendicular to the mounting plane. When the second abutting surface is optically bonded to the mounting plane, when the second abutting surface is optically bonded to the mounting plane, the axis of the lens to be processed is parallel to the mounting plane.

[0012] To implement the above technical solution, during processing, first embed the cylindrical surface of the lens to be processed into the positioning notch, and use glue to cure it so that the two are closely abutted. Then first optically bond the first abutting surface to the mounting plane, and then grinding and polishing treatment can be started. After the treatment is completed, separate the positioning fixture from the mounting base plate, rotate the positioning fixture by 90°, and optically bond the second abutting surface to the mounting plane, then the side of the lens can be processed. After the side is processed to the size required by the process, separate the positioning fixture from the mounting base plate again, then separate the lens from the positioning fixture, clean the lens, and then the axial edge distance and side verticality index can be measured; the overall operation process is simpler and more convenient, the operation skill requirements are low, and the time for loading and unloading the plate can be saved, improving the processing efficiency. After testing, the side verticality of the cylindrical lens produced by this processing fixture is basically within 2 minutes, which can meet the process requirements, and makes the subsequent processing steps easier to operate. The axial edge distance of the cylindrical lens can reach less than 0.2mm, and 80% of the proportion can reach less than <0.1mm, greatly improving the consistency. The height of the axial edge distance of the same plate is less than 0.05mm, which is easy to assemble into a plate for processing.

[0013] In some exemplary embodiments, a high-temperature tape is pasted on the side surface of the lens to be processed for adjusting the axial edge distance, and the thickness of the high-temperature tape is 0.03 - 0.08mm.

[0014] To implement the above technical solution, by pasting the high-temperature tape to adjust the height of the axial edge distance, the consistency of the axial edge distance of the same plate is further improved.

[0015] In some exemplary embodiments, the perpendicularity error between the first abutting surface and the second abutting surface is less than 1 minute.

[0016] To implement the above technical solution, it can ensure that sufficient precision requirements are met during the processing of the cylindrical lens.

[0017] In some exemplary embodiments, a positioning portion is provided at the bottom of the lens to be processed, and the positioning notch includes a first notch adapted to the positioning portion and a second notch adapted to the bottom of the lens to be processed.

[0018] Implementing the above technical solution enables more stable and accurate positioning of the cylindrical lens.

[0019] In summary, compared with the prior art, the present utility model has the following beneficial effects:

[0020] An embodiment of the present utility model provides a high-precision processing jig for a cylindrical lens, including: a mounting base plate, on the upper surface of which a mounting plane is formed; a positioning fixture having a first abutting surface and a second abutting surface perpendicular to each other. A positioning notch is provided on the positioning fixture on a side opposite to the first abutting surface, and the positioning notch is adapted to the cylindrical surface of the lens to be processed. The cylindrical surface of the lens to be processed is adhesively fixed to the positioning notch. Both the first abutting surface and the second abutting surface are used for optical bonding to the mounting plane. When the first abutting surface is optically bonded to the mounting plane, the axis of the lens to be processed is perpendicular to the mounting plane. When the second abutting surface is optically bonded to the mounting plane, the axis of the lens to be processed is parallel to the mounting plane. During processing, first, the cylindrical surface of the lens to be processed is embedded into the positioning notch and fixed by curing with glue to make them closely adhere. Then, the first abutting surface is optically bonded to the mounting plane, and then grinding and polishing treatment can be started. After the treatment is completed, the positioning fixture is separated from the mounting base plate. Then, the positioning fixture is rotated 90°, and the second abutting surface is optically bonded to the mounting plane, and then the side surface of the lens can be processed. After the side surface is processed to the size required by the process, the positioning fixture is separated from the mounting base plate again, and then the lens is separated from the positioning fixture. After cleaning the lens, the axial edge distance and side verticality index can be measured. The overall operation process is simpler and more convenient, with low requirements for operating skills, and can save the time of loading and unloading the workpiece, improving the processing efficiency. After testing, the side verticality of the cylindrical lens produced by using this processing jig is basically within 2 minutes, which can meet the process requirements, and makes the subsequent processing steps easier to operate. The axial edge distance of the cylindrical lens can reach less than 0.2 mm, and 80% of the proportion can reach less than <0.1 mm, greatly improving the consistency. The height of the axial edge distance of the same plate is less than 0.05 mm, which is easy to assemble into a plate for processing. Description of the Drawings

[0021] Figure 1 It is a processing schematic diagram of grinding the plane of the component on the upper plate in the background technology.

[0022] Figure 2 It is a processing schematic diagram of grinding the side surface of the component in the background technology

[0023] Figure 3This is a schematic structural diagram when grinding the flat surface in the embodiment of the present utility model.

[0024] Figure 4 This is a schematic structural diagram when processing the side surface in the embodiment of the present utility model.

[0025] The corresponding component names represented by the numbers and letters in the figure:

[0026] 10. Element; 20. Mounting base plate; 21. Mounting flat surface; 30. Positioning fixture; 31. First abutting surface; 32. Second abutting surface; 33. Positioning notch; 331. First notch; 332. Second notch; 40. Lens to be processed; 41. Positioning portion. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] As Figure 3 and Figure 4 shown, the present utility model provides a high-precision processing fixture for cylindrical lenses, including: a mounting base plate 20, on the upper surface of which a mounting flat surface 21 is formed; a positioning fixture 30, the positioning fixture 30 has a first abutting surface 31 and a second abutting surface 32 that are perpendicular to each other, a positioning notch 33 is formed on the side of the positioning fixture 30 opposite to the first abutting surface 31, the positioning notch 33 is adapted to the cylindrical surface of the lens 40 to be processed, and the cylindrical surface of the lens 40 to be processed is adhesively fixed to the positioning notch 33; both the first abutting surface 31 and the second abutting surface 32 are used for optical gluing to the mounting flat surface 21. When the first abutting surface 31 is optically glued to the mounting flat surface 21, the axis of the lens 40 to be processed is perpendicular to the mounting flat surface 21. When the second abutting surface 32 is optically glued to the mounting flat surface 21, when the second abutting surface 32 is optically glued to the mounting flat surface 21, the axis of the lens 40 to be processed is parallel to the mounting flat surface 21.

[0029] The mounting flat surface 21 needs to be ensured to be flat, smooth and free of foreign objects when optically gluing with the first abutting surface 31 and the second abutting surface 32. The perpendicularity error between the first abutting surface 31 and the second abutting surface 32 is less than 1 minute, that is, less than 0.0167°, so as to ensure sufficient precision requirements during the processing of cylindrical lenses.

[0030] A positioning portion 41 is provided at the bottom of the lens 40 to be processed. The positioning notch 33 includes a first notch 331 adapted to the positioning portion 41 and a second notch 332 adapted to the bottom of the lens 40 to be processed. In practical applications, the shape of the positioning notch 33 needs to be set according to the shape of the cylindrical lens to achieve more stable and accurate positioning of the cylindrical lens.

[0031] Further, a high-temperature tape is pasted on the side surface of the lens 40 to be processed for adjusting the axial edge distance. The thickness of the high-temperature tape is 0.03 - 0.08 mm. Preferably, the thickness of the high-temperature tape is 0.05 mm. By pasting the high-temperature tape to adjust the height of the axial edge distance, the consistency of the axial edge distance on the same disk is further improved.

[0032] During processing, first embed the cylindrical surface of the lens 40 to be processed into the positioning notch 33 and cure with glue to make the two closely adhere. Then, first optically bond the first abutting surface 31 to the mounting plane 21, and then the grinding and polishing process can be started. After the processing is completed, separate the positioning fixture 30 from the mounting base plate 20, rotate the positioning fixture 30 by 90°, and optically bond the second abutting surface 32 to the mounting plane 21 to process the side surface of the lens. After the side surface is processed to the required size, separate the positioning fixture 30 from the mounting base plate 20 again, then separate the lens from the positioning fixture 30. After cleaning the lens, the axial edge distance and the side verticality index can be measured. Finally, according to the measured axial edge distance data, paste a high-temperature tape on the side surface of the lens to adjust the height of the axial edge distance to meet the requirements of the axial edge distance consistency for the upper disk on the same disk, and adopt the wax-sealing upper-disk process for upper-disk processing; the overall operation process is simpler and more convenient, with low requirements for operating skills, and can save the time for loading and unloading the disk, improving the processing efficiency. After testing, the side verticality of the cylindrical lens produced by using this processing fixture is basically within 2 minutes, which can meet the process requirements, and makes the subsequent processing steps easier to operate. The axial edge distance of the cylindrical lens can reach less than 0.2 mm, and 80% of the proportion can reach less than <0.1 mm, greatly improving the consistency. The height of the axial edge distance on the same disk is less than 0.05 mm, which is easy to assemble into a disk for processing.

[0033] The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can be made. These are all equivalent modifications and evolutions based on the essence of the present invention to the above embodiments, and all belong to the protection scope of the present invention.

Claims

1. A high-precision processing jig for cylindrical lenses, characterized in that: include: A mounting base plate, wherein the upper surface of the mounting base plate is formed with a mounting plane; A positioning fixture, wherein the positioning fixture has a first abutting surface and a second abutting surface which are perpendicular to each other, and a positioning notch is provided on the side of the positioning fixture opposite to the first abutting surface, the positioning notch is adapted to the cylindrical surface of the lens to be processed, and the cylindrical surface of the lens to be processed is bonded and fixed to the positioning notch; The first surface against the mounting surface and the second surface against the mounting surface are both used for optical glue to the mounting plane. When the first surface against the mounting surface is on the mounting plane, the axis of the lens to be processed is perpendicular to the mounting plane. When the second surface against the mounting surface is on the mounting plane, the axis of the lens to be processed is parallel to the mounting plane.

2. The high-precision cylindrical lens processing jig according to claim 1, characterized in that: A high temperature tape is pasted on the side of the lens to be processed for adjusting the axis margin, and the thickness of the high temperature tape is 0.03-0.08 mm.

3. The high-precision cylindrical lens processing jig according to claim 1, characterized in that: The verticality error between the first abutment surface and the second abutment surface is less than 1 point.

4. The high-precision cylindrical lens processing jig according to claim 1, characterized in that: A positioning portion is provided at the bottom of the lens to be processed, and the positioning notch comprises a first notch matched with the positioning portion and a second notch matched with the bottom of the lens to be processed.

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