FIELD: optics.
SUBSTANCE: device has three serially placed components along beams route, first of which is two-lens, glued together of biconvex lens and plane-concave lens, directed by plane to image. Second component is single positive meniscus directed by convex portion to object. Radiuses of optical surfaces are interconnected by relations shown in invention formula.
EFFECT: higher adaptability to manufacture and higher image quality.
1 dwg
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