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A Method for Reducing Bonding Stress of Aspherical Large-Aperture Hollow Mirror

A reflective mirror and large-caliber technology, which is applied in the direction of instruments, installation, optics, etc., can solve the problems of poor surface accuracy, relative displacement between the main reflector and the main mirror frame, etc.

Active Publication Date: 2020-05-19
西安应用光学研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • A Method for Reducing Bonding Stress of Aspherical Large-Aperture Hollow Mirror
  • A Method for Reducing Bonding Stress of Aspherical Large-Aperture Hollow Mirror
  • A Method for Reducing Bonding Stress of Aspherical Large-Aperture Hollow Mirror

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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 assembly, and specifically discloses a method for reducing the bonding stress of an aspherical large-diameter hollow reflector. The present invention comprises a large-diameter aspheric main reflector 1, a main mirror frame 2, a main mirror pressure plate 3, a pressure plate rubber pad 4 and a screw 5, wherein the main mirror frame includes assembly structures such as a support platform and a glue injection hole, and when assembled, the main mirror and The main mirror frame is supported by the support table, the main mirror is assisted in positioning by the main mirror pressure plate and the pressure plate rubber pad, and the main mirror is fixed by pouring glue through the glue injection hole. This invention can not only reduce the supporting stress of the main mirror frame to the main reflector, but also reduce the stress generated by the main reflector during the gluing process, reduce the change of the surface shape of the main reflector, and ensure the surface accuracy of the main reflector and the main reflector. The position accuracy of the reflector relative to the main mirror frame further ensures the imaging quality of the optical system.

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 Patents(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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