| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wide-angle relay lens and an optical system using the same in the present invention. <P>SOLUTION: A wide-angle relay lens of the present invention comprises: a first lens having negative refraction power; and a second lens having positive refraction power, the lenses being disposed on an object side of a main lens and arranged in order from the object side to an image side thereof, wherein the wide-angle relay lens satisfies the following conditional expressions: 0.4<¾f1/f2¾<0.8; 2<v1/v2<3.8; and 0.86<N1/N2<1.12, where f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, v1 is an Abbe number of the first lens, v2 is an Abbe number of the second lens, N1 is a refractive index of the first lens, and N2 is a refractive index of the second lens. <P>COPYRIGHT: (C)2012,JPO&INPIT |
