| 摘要 |
1,266,914. Microscope objectives. OLYMPUS OPTICAL CO. Ltd. April 14, 1969 [April 15, 1968], No.18969/69. Heading G2J. A microscope objective, of focal length F comprises a forward lens group of six elements, the second and third, and fifth and sixth being cemented together, and a rearward lens group of far elements, the second, third and fourth being cemented together, separated by a distance d 12 such that, the first element of the forward group being a meniscus concave to the object and satisfying the following expression, where n 4 is the refractive index and r 3 the radius of curvature at the surface facing the object, the final member of the forward group being a meniscus convex to the object having a focal length f and formed such that and the rearward group being in the form of a meniscus, of focal length f 2 , concave to the object and satisfying the following condition Optical data for one example is given. |
