| 摘要 |
FIELD: optics. SUBSTANCE: eyepiece incorporates three components. First component is meniscus facing object with concavity, second component is glued doublet comprising biconvex lens and negative meniscus facing object with concavity, third component is biconvex lens. Focal distances between components and their curvature radii are related by relations given in formula of invention. EFFECT: provision for increased distance of exit pupil and relative aperture with simultaneous reduction of spherical aberration. 3 dwg, 1 tbl |
