FIELD: optical instrument engineering. SUBSTANCE: eye-piece has three components. The first one is double-glued positive lens, which is formed by positive and negative lenses. The second one is single positive lens, and the third component is positive meniscus, which is turned with its convexity to object. Thicknesses of the lenses are related by corresponding relation with focal length of the eye-piece. EFFECT: improved precision. 2 dwg, 5 tbl
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