Substrate material is important while manufacturing of large-dimensioned optical mirrors for ground and space applications. The properties of Astrositall, its dimensional stability, design features are considered. Various types of supporting cells and optical components bases are used in the process of surfaces figuring. Applying of membranepneumatic support to base the mirror in the course of working surface testing is considered. However, in some cases it is necessary to support the mirror basing it on glued interface elements. In such case, surface figure difference between standard and manufacturing support cell, which is taken into account during figuring, is estimated via modeling.
JSC LZOS applies various mechanical and optical methods to test optics at all stages of figuring, from milling and grinding to polishing stage. Computer Generated Holograms (CGH) are successfully applied at the polishing stage for the following purposes: testing of large-size optical components, on- and off-axis surfaces; alignment with respect to interferometer; defining of an aspherical surface optical vertex position with respect to the geometrical center for optical systems alignment. All this allows manufacturing of large-size aspherical on- and off-axis astronomical and space mirrors with high accuracy.
JSC LZOS successfully applies Computer Generated Holograms (CGH) for testing of on- and off-axis surfaces of largedimensioned optical components, for their alignment with respect to interferometer, for defining of aspherical surface optical vertex position with respect to the geometrical center, for optical systems alignment. All this allows producing of large-dimensioned aspherical on- and off-axis astronomical and space mirrors with high accuracy.
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