RU2000587C1 - Catadioptric lens - Google Patents

Abstract

Usage: in a mirror small format devices. The essence of the invention lies in the fact that the lens contains a front compensator, consisting of a negative meniscus 1 with a central hole and a biconvex positive lens 2 with a central hole facing convex surfaces to each other, a primary mirror 3 with a central hole facing concavity to the object , a secondary mirror facing concavity to the object and applied to the outer surface of the meniscus 4. and a rear compser, consisting of glued concave-flat 5 and plane-convex lenses 6. Focus lens distance mm. the relative aperture is 1: 5, 6, the angle of view is 5 degrees, the resolution of the lens is more than 50 li / mm in the center and 40 ln / mm along the edge. 2 s. f-ly, 4 ill. 3 tab.

Description

Table 1

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