FIELD: optical engineering. SUBSTANCE: system has first meniscus lens facing the entrance pupil plane with its concave surface, second positive lens, third lens glued of negative and positive lenses. Second positive lens is double-glued of negative lens and positive lens with aspheric surface facing the entrance pupil surface. Fourth negative lens is glued of two menisci facing the entrance pupil plane with their concave surface. EFFECT: higher examination results. 1 dwg
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