Title:
【発明の名称】コンパクトなズ-ムレンズ
Document Type and Number:
Japanese Patent JP2569302
Kind Code:
B2
Abstract:
PURPOSE:To obtain a compact zoom lens system of less variance of aberrations by providing lens parts having a positive refracting power and a negative refracting power and providing one distributed index lens at least in the lens part having the positive refracting power. CONSTITUTION:A lens part 11 having the positive refracting power and a lens part 12 having the negative refracting power are arranged in order, and the lens part 11 having the positive refracting power has the first lens group having a positive refracting power, and the lens part 12 having the negative refracting power has a lens group having a negative refracting power. The interval between the first lens group and the lens group having the negative refracting power is shortened from the wide angle and to the telephoto end to perform zooming. The lens part 11 having the positive refracting power has one distributed index lens which shares the optical axis with the other lenses at least. Either of a radial type and axial type is used as the distributed index lens.
Inventors:
Hiroki Nakayama
Nozomi Nozomi
Akinaga Horiuchi
Jun Hattori
Shigeyuki Suda
Nozomi Nozomi
Akinaga Horiuchi
Jun Hattori
Shigeyuki Suda
Application Number:
JP10239985A
Publication Date:
January 08, 1997
Filing Date:
May 13, 1985
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B13/02; G02B9/00; G02B15/16; (IPC1-7): G02B15/16; G02B9/00
Domestic Patent References:
| JP6048009A | ||||
| JP57168209A | ||||
| JP58184916A | ||||
| JP58220115A | ||||
| JP59149312A |
Attorney, Agent or Firm:
Marushima Giichi