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Method for lowering aspheric surface large-diameter hollow reflector adhesive stress

A large-diameter, mirror technology, applied in installation, optics, instruments, etc., can solve problems such as the relative displacement of the main mirror and the main mirror frame, and the deterioration of surface accuracy.

Active Publication Date: 2018-06-29
西安应用光学研究所
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Problems solved by technology

[0005] It mainly solves the problems of poor surface accuracy and relative displacement between the main mirror and the main frame during the bonding and assembly process of large-diameter hollow mirrors. The optical-mechanical structure and bonding method can be widely used in the assembly process of large-diameter hollow mirrors

Method used

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  • Method for lowering aspheric surface large-diameter hollow reflector adhesive stress
  • Method for lowering aspheric surface large-diameter hollow reflector adhesive stress
  • Method for lowering aspheric surface large-diameter hollow reflector adhesive stress

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Embodiment Construction

[0053] The Cassegrain system structure of a certain type of optoelectronic product is composed of a main reflector 1, a main mirror frame 2, a main mirror pressure plate 3, a pressure plate rubber pad 4, and a pressure plate screw 5, such as Figure 6 shown. The main reflector 1 adopts such as Figure 4 In the structure shown, the material of the main reflector is quartz glass, the aperture size is φ230mm, the weight is 2.1Kg, the hollow diameter φ65mm accounts for 1 / 3.5 of the aperture of the main reflector, the maximum thickness of the edge is 30.2mm, and the thickness of the hollow hole is 20mm. 2 / 3 of the thickness, and the aspect ratio of the thinnest part is 1 / 11.5. After the measurement, the main mirror assembly front type RMS = λ / 30 (λ = 632.8nm). The main reflector is assembled in the main mirror frame, and the main reflector is fixed by bonding. After the glue is poured, the main reflector is fixed with the main mirror pressure plate and the aviation rubber pad. The...

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Abstract

The invention belongs to the field of optical-mechanical structure design and optical-mechanical assembling, and particularly discloses a method for lowering the aspheric surface large-diameter hollowreflector adhesive stress. According to the method, a large-diameter aspheric surface main mirror 1, a main mirror frame 2, a main mirror pressing plate 3, a pressing plate rubber gasket 4 and a screw 5 are included, wherein the main mirror frame comprises a supporting table, an adhesive injection hole and other assembling structures; during assembling, the main mirror and the mirror frame are supported through a supporting table, main mirror auxiliary positioning is performed through the main mirror pressing plate and the pressing plate rubber gasket, and the main mirror is fixed through potting of the adhesive injection hole. The supporting stress of the main mirror frame for the main mirror can be lowered, meanwhile, stress generated by the main mirror in the adhesive injection processcan be lowered, changes of the main mirror surface type are reduced, the surface precision of the main mirror and the position precision of the main mirror relative to the main mirror frame are ensured, and the optical system imaging quality is further ensured.

Description

technical field [0001] The invention belongs to the technical field of optical-mechanical design and assembly, in particular to a method for reducing the adhesive stress of an aspherical large-diameter hollow reflector. Background technique [0002] The main reflector in the Cassegrain system is the main imaging element, and most of its structures are aspheric hollow reflectors. The change of the surface type of the main reflector directly affects the image quality of the Cassegrain system. The main reflector and main mirror frame of the card system are usually assembled and connected by glue bonding, which can make the card system work normally and efficiently in various postures (vertical, inclined, horizontal) and complex working conditions. use. However, during the assembly process, due to the structural support stress of the main mirror frame and the bonding stress between the main mirror and the main mirror frame, a large stress concentration occurs inside the structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/183
CPCG02B7/183
Inventor 张森张燕惠刚阳张云龙刘欣左晓舟石凯管伟王章利王中强
Owner 西安应用光学研究所
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