| 摘要 |
FIELD: optics. ^ SUBSTANCE: the objective consists of successively located on the optical axis first component including a positive meniscus turned by the convexity to the object, double-glued meniscus containing a biconvex and biconcave lenses, and a negative meniscus turned by the convexity to the object, and the second component consisting of a single biconvex lens. The focal powers of the components relate as 3.5 <= f` 1comp/ f` 2comp <= 4, where f` 1comp, f` 2comp - the focal lengths of the first and second components. The effective distance between the components equals 0.2 <= deff.comp <= 0.22, where deff.comp= dcomp /f`,dcomp- the distance between the components, f- objective focal length. ^ EFFECT: provided an increase of the field of vision, and enhanced quality of image due to the reduced spherical aberration, meridian curvature and sagittal curvature. ^ 4 dwg |
