| 摘要 |
1,110,689. Moulding reflectors. Z. HERPAY. 15 Aug., 1966 [16 May, 1966], No. 21578/66. Addition to 1,108,523. Heading B5A. [Also in Division G2] A method of constructing an astronomical reflector as in the parent Specification, comprising the steps of using a silver-steel, glass or other rigid tool to make a base of complementary shape to that desired for the final reflector and having an accuracy at least equal to a wavelength of the light used with the reflector, stretching a reflecting film or skin over the base, forming a backing on the film or skin and removing the finished reflector from the base. In order to make the reflector lighter in weight the backing is formed by a multiplicity of rigid bodies adhesively secured to the reflecting skin. The rigid bodies may be bricks or tubes of carbon fibre reinforced polymers. To enable the reflector to withstand temperatures up to 400‹ C., polyimide resins may be used. For forming a large reflecting skin as is necessary in making a large reflector, a skin may be formed on a number of optically flat rectangular sections of glass which are subsequently pressed together on a large flat surface with their edges secured together with self-adhesive strips to prevent a keying material from oozing through the slight gaps between the sections.
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