Planar film mirror installing method

An installation method and film mirror technology, applied in installation, optics, instruments, etc., can solve the problem of not clearly proposing a precise film mirror installation method, etc., to reduce the surface shape accuracy is not high, the weight of the support structure is small, and the surface shape accuracy is reduced. improved effect

Active Publication Date: 2015-06-24
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Application Information

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Problems solved by technology

In recent years, many scientific research institutions and colleges at home and abroad have carried out related research

Method used

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  • Planar film mirror installing method
  • Planar film mirror installing method

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Embodiment

[0045] The surface shape index of the film mirror 1 depends on the surface shape accuracy of the film itself, the precision and rigidity of the precision support ring, and is also related to the internal stress of the film. Here, the surface accuracy of the film mirror 1 itself and the surface accuracy of the annulus 2-1 of the precision support ring 2 are limited, and it is guaranteed that this limitation is easy to realize in engineering, and the method of the present invention is premised on this Make an introduction.

[0046] Firstly, the parameters of the thin film mirror 1 are limited. In this embodiment, in order to meet the requirement that the optical diameter of the final formed thin film mirror assembly is Ф200 mm, the diameter of the thin film mirror itself is Ф250 mm, the thickness is 20 μm, and the surface shape accuracy is better than λ / 10 (λ = 0.632 μm).

[0047] Then limit the performance of the precision support ring 2, the inner diameter is Ф220mm, a certai...

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Abstract

Provided is a planar film mirror installing method. Firstly, a round film mirror is expanded to be in a planar state, rectangular thin gaskets with holes evenly and firmly adhere to the periphery of the film mirror through a special tool, the two ends of N ropes are connected with the rectangular gaskets and tension sensors respectively, and the tension sensors on the periphery are fixed so that the ropes can be located on the same plane. Then, a precise supporting ring is placed below the film mirror which is slightly ejected through the side with an annular step face, a pressing ring is installed above the supporting ring, the pressing ring is pre-tightened through a screw, but it is guaranteed that the film mirror can move between the pressing ring and the supporting ring, tension is applied to the outermost ends of the ropes on the periphery of the film mirror, tension values are displayed through the tension sensors, the tension values are adjusted, deformation of the film mirror is detected in real time, and the tension values are repeatedly adjusted according to actually measured deformation so that the film mirror face can be optimal. According to the method, supporting is performed through the supporting ring, installation of the high-precision planar film mirror is achieved in a coplane tension adjustment mode on the edge of the film mirror, and the using requirement of a high-precision optical system can be met.

Description

technical field [0001] The invention relates to a method for installing a flat film mirror, which can be applied to the installation requirements of the film mirror of an imaging optical system. Background technique [0002] With the development of aerospace optical remote sensing technology, on the one hand, lightweight optical remote sensors are becoming a hot spot in the field of aerospace optical remote sensing in various countries; At present, in the field of aerospace optical remote sensing, rigid mirrors or lenses are mostly used. The materials are mostly glass-ceramics, ULE, and silicon carbide. Mirrors or lenses made of rigid materials are large in volume and weight. Moreover, limited by the molding process of the rigid mirror body, it is very difficult to develop and process a mirror body with a diameter greater than 5m. The above factors make it difficult for rigid mirrors to meet the development needs of large diameter, low weight, and low cost remote sensors in ...

Claims

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Application Information

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IPC IPC(8): G02B7/188
CPCG02B26/0825
Inventor 金建高苏云阮宁娟郭崇岭
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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