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
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[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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