1981-05-26
1984-06-26
Evans, F. L.
350310, G02B 508
Patent
active
044563329
ABSTRACT:
In forming a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement characterized by a method of forming the mirror module in which the mirror is laid upon a solid rigid supporting bed in one or more sections, with or without focusing; a mirror backing sheet is applied by first applying respective thin layers of silicone grease and, thereafter, progressively rolling application to eliminate air bubbles; followed by affixing of a substrate assembly to the mirror backing sheet to form a mirror module that does not curve because of thermally induced stresses and differential thermal expansion or contraction effects. The silicone grease also serves to dampen fluttering of the mirror and protect the mirror backside against adverse effects of the weather. Also disclosed are specific details of preferred embodiments.
REFERENCES:
patent: 3600257 (1971-08-01), Reinhardt
patent: 3906927 (1975-09-01), Caplan
patent: 4245895 (1981-01-01), Wildenrotter
Atlantic Richfield Company
Evans F. L.
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