.~ Including specified control or retention of the shape of a mirror surface {3}
848
.~.~ With structure to minimize internal mirror stress
DEFINITION
Classification: 359/848
With structure to minimize internal mirror stress:
(under subclass 846) Subject matter including supporting a mirror so as to minimize internal mirror stress which might otherwise distort the shape of the reflective surface.
(1) Note. This subclass includes light weight mirror structures designed to minimize sagging stress.
SEE OR SEARCH THIS CLASS, SUBCLASS:
845, for thermal mirror stress reduction by circulating fluid.
883, for laminated or layered mirror support structure in general.
