| 摘要 |
FIELD: optical instrument engineering. SUBSTANCE: the system has an objective lens and on eye-piece. The objective lens is made of two positive lenses, the first of them is cemented together of a biconcave and a convex-concave lens, and the second is a singular flat-convex lens, whose plane faces the image, the eye-piece is a convex-concave lens. EFFECT: produced telescopic system with a visible magnification of 5.5 times with an enhanced quality of image at a small length. 1 dwg |
