| 摘要 |
FIELD: physics. ^ SUBSTANCE: lens consists of three components. The first component is a single biconvex lens (1). The second consists of a biconvex (2) and a biconcave (3) lens and a converging-meniscus lens (4). The third consists of a biconvex (5) and a biconcave (6) lens. All the lenses are made from two types of common optical glass. In the first version, refraction indices 1.45<n1<1.55; 1.65<n2<1.75, and dispersion coefficients 60<1<95; 20<2<30 or 40<2<50. In the second version, refraction indices and dispersion coefficients satisfy the condition: 1.43<n1<1.45 or 1.55<n1<1.65; 1.75<n2<2.2; 60<1<95; 20<2<30 or 40<2<50. ^ EFFECT: higher image quality. ^ 2 cl, 9 dwg |
