发明授权
US4447130A Light-weight mirror blank for astronomical purposes and method of making a supporting framework for such blanks 失效
用于天文目的的轻量级镜面空白以及为这种坯料制作支撑框架的方法

Light-weight mirror blank for astronomical purposes and method of making
a supporting framework for such blanks
摘要:
A light-weight mirror for astronomical purposes is disclosed. The mirror consists of a mirror plate, a back plate and a supporting framework disposed between them and consisting of a plurality of rows of tubes. The rows of tubes are staggered one from the other. Each tube in a row has a line or strip of contact with two adjacently disposed tubes of the next row. The tubes are welded together along the contact line or strip. The thickness of the tube wall is reduced in the area of the contact line or strip.
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