Title:
【発明の名称】大口径中望遠レンズ
Document Type and Number:
Japanese Patent JP2740672
Kind Code:
B2
Abstract:
A large-aperture quasi-telephone lens system having favorably corrected aberrations, especially chromatic aberration, and providing images of high quality comprising, in the order from the object side, a front lens group, a stop and a rear lens group, said rear lens group consisting of a lens component having negative refractive power and a lens group having positive refractive power, and comprising at least one graded refractive index lens element.
Inventors:
Norihiko Aoki
Application Number:
JP7070889A
Publication Date:
April 15, 1998
Filing Date:
March 24, 1989
Export Citation:
Assignee:
Olympus Optical Co., Ltd.
International Classes:
G02B9/00; G02B9/62; G02B9/64; G02B13/02; (IPC1-7): G02B9/62; G02B9/64
Domestic Patent References:
| JP59149312A | ||||
| JP62144125A | ||||
| JP6250808A |