OBJECTIVE
FIELD: measuring systems. ^ SUBSTANCE: objective can be used as objective of high-precision angle-measuring systems. Objective has two components. First component is made in form of positive biconvex lens. Second component has positive and negative menisci turned with their convexity to plane of ima...
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| Format: | Patent |
| Sprache: | eng ; rus |
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| Zusammenfassung: | FIELD: measuring systems. ^ SUBSTANCE: objective can be used as objective of high-precision angle-measuring systems. Objective has two components. First component is made in form of positive biconvex lens. Second component has positive and negative menisci turned with their convexity to plane of image. Specific relations are met among refractivity, coefficients of dispersion of lens materials, focal lengths of components and of lens of objective, as well as air gaps and back focal part of objective. ^ EFFECT: simplified design; increased relative aperture of objective; preservation of quality of image closer to diffraction one. ^ 1 dwg |
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