Clamping device and clamping method for concave processing of large aspect ratio aspheric optical element

A technology of optical components and large aspect ratio, applied in optical components, optics, installation, etc., can solve problems such as difficult disassembly, and achieve the effect of improving safety, improving processing accuracy, and safe and reliable disassembly

Active Publication Date: 2020-05-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of precise and safe clamping and difficult disassembly after conventional processing of the existing large aspect ratio aspheric optical element concave surface processing, the present invention further proposes a clamping device and clamping device for large aspect ratio aspheric optical element concave processing method

Method used

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  • Clamping device and clamping method for concave processing of large aspect ratio aspheric optical element
  • Clamping device and clamping method for concave processing of large aspect ratio aspheric optical element
  • Clamping device and clamping method for concave processing of large aspect ratio aspheric optical element

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specific Embodiment approach 1

[0019] Specific implementation mode one: combine Figure 1 to Figure 4 This embodiment is described. The clamping device for concave processing of large aspect ratio aspheric optical elements in this embodiment includes a fixture base 3, multiple positioning bases 1 and multiple bonding bases 2, multiple positioning bases 1 and multiple The bonding matrix 2 is arranged alternately on the upper end surface of the fixture base 3 along the circumferential direction, the inner side walls of the positioning matrix 1 and the bonding matrix 2 are both curved surfaces, and the curve equation formed by the inner side wall of the positioning matrix 1 and the aspheric surface with a large aspect ratio The curve equations of the outer surface of the optical element are the same, and the horizontal radial dimension of the curved surface of the inner wall of the bonding base 2 is larger than the horizontal radial dimension of the curved surface of the inner wall of the positioning base 1 at ...

specific Embodiment approach 2

[0021] Specific implementation mode two: combination Figure 1 to Figure 4 Describe this embodiment, the positioning substrate 1 described in this embodiment is a positioning substrate made of polymethyl methacrylate, the bonding substrate 2 is a bonding substrate made of polymethyl methacrylate, and the clamp base 3 is polymethacrylic acid Clamp base made of methyl ester. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0022] The material of the clamping device is polymethyl methacrylate. The abbreviation code of polymethyl methacrylate is PMMA, commonly known as plexiglass. It is half of ordinary glass, but its anti-fragmentation ability is several times higher. It has good insulation and mechanical strength and is easy to process. PMMA is currently the best polymer transparent material, with an optical transmittance of 92%. The PMMA material of the clamping device is easy to be turned and processed with high precision...

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 4 This embodiment will be described. The lower end surfaces of the positioning base 1 and the bonding base 2 described in this embodiment are fixedly connected to the upper end surface of the fixture base 3 . The undisclosed technical features in this embodiment are the same as those in the first or second specific embodiment.

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Abstract

The invention relates to a clamping device and a clamping method for processing the concave surface of an aspheric optical element with a large length-to-diameter ratio, and relates to the technical field of machining clamping devices. The invention aims to solve the problems of precise and safe clamping during the concave processing of the existing large aspect ratio aspheric optical element and difficult disassembly after conventional processing. The clamping device includes a fixture base, a plurality of positioning substrates and a plurality of bonding substrates, the plurality of positioning substrates and the plurality of bonding substrates are alternately arranged on the upper end surface of the fixture base along the circumferential direction, and the inner side walls of the positioning substrates and the bonding substrates are both It is a curved surface, and the curve equation formed by the inner side wall of the positioning base is the same as the curve equation of the outer surface of the aspheric optical element with a large aspect ratio. Horizontal radial dimension. Clamping method: smear low-stress UV-curable glue; irradiate molding; disassemble the clamping device. The invention is used for processing the concave surface of the aspheric optical element with large length-to-diameter ratio.

Description

technical field [0001] The invention relates to a clamping device and a clamping method for processing a concave surface of an aspheric optical element with a large aspect ratio. Background technique [0002] The infrared dome is one of the key components of the air-to-air launcher. With the increasing speed of infrared air-to-air launcher, the range becomes longer, especially when the launcher is flying at supersonic speed, the issue of drag reduction of the launcher is very important. This requires that the fairing at the forefront of the launcher not only has good optical, mechanical and thermal performance, but also has a good aerodynamic shape. [0003] Previous infrared-guided air-to-air launchers used spherical crowns or hemispherical fairings with concentric inner and outer radii. Unfortunately, the hemispherical fairing with an aspect ratio of 0.5 is not an ideal shape for a high-speed launcher, and the best aerodynamic shape cannot be obtained. A considerable par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/00G02B7/183
CPCG02B7/00G02B7/183
Inventor 张春雨郭兵刘晗赵清亮王金虎高志浩于盟
Owner HARBIN INST OF TECH
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