KEYWORDS: Surface finishing, Matrices, Mirrors, Polishing, Off axis mirrors, Data modeling, Space telescopes, Optical components, Manufacturing, 3D modeling
For the first time in Russia, a technology has been developed, using computer-controlled automatic system and a set of special tools, that allows testing and aspherization of off-axis large-sized optical elements of astronomical and space telescopes with a deviation from the nearest sphere up to 20 mm. Computer-controlled process of optical surface figuring is carried out at all stages – milling, grinding and polishing.
JSC LZOS has been using diffraction optical elements (DOE) or Computer Generated Holograms (CGH) for many years to test the surfaces of large-sized optical mirrors for astronomical and space purposes. They are used for aspherical surface figure testing; testing of aspherical surface vertex position relative to the mirror geometric center, calculation of distortion in interferogram image, mutual adjustment of mirrors in testing scheme, etc. Thus, CGH have become an integral part of the up-to-date testing of large-sized optical mirrors and optical systems aspherical surfaces.
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