作者: Taro Asami , 太郎 浅見
DOI:
关键词: Regular polygon 、 Optics 、 Radius of curvature (optics) 、 Imaging lens 、 Physics 、 Optical power 、 Flat surface
摘要: PROBLEM TO BE SOLVED: To provide at a low cost an optical system that is compact, wide-angle, and bright while maintaining superior performance, in imaging lens. SOLUTION: The lens includes: order from its object side, negative first L1 of meniscus shape the convex surface which directed toward side; second L2 being either planoconcave flat side or biconcave having larger absolute value radius curvature third biconvex L3; stop St; positive fourth L4 smaller image cemented L56 with fifth L5 sixth L6 shape, refractive power, Abbe's number ν 3 d-line L3 satisfies inequality (1): < 43. COPYRIGHT: (C)2008,JPO&INPIT