TELESCOPIC SYSTEM

摘要

FIELD: optical instrumentation engineering. SUBSTANCE: negative 1 and positive 2 menisci facing the object with their concavity are positioned in objective in front of first positive lens. Flat-convex lens 5 is positioned behind negative lens. Second component of objective is glued of negative meniscus 7 facing the image with its concavity and biconvex lens 8. Thickness of both biconvex objective lenses 6, 8 is within 0.5-1.0 of objective focal distance. EFFECT: more efficient construction. 2 dwg, 2 tbl