Title:
ズームレンズ
Document Type and Number:
Japanese Patent JP4903418
Kind Code:
B2
Abstract:
To obtain a high imaging performance even for a relatively long focal length in a zoom lens provided with an optical-path bending member for bending an optical path. The following are included: a first group of lenses G 1 having a positive refracting power, a second group of lenses G 2 having a negative refracting power, a third group of lenses G 3 having a positive refracting power, and a fourth group of lenses G 4 having a positive refracting power arranged in that order from the object side to the image surface side. Zooming is performed by moving the second group of lenses G 2 and fourth group of lenses G 4 along an optical axis. The first group of lenses G 1 is constituted of a group of positive lenses L 1 having a positive refracting power and an optical-path bending member L 2 for bending an optical path arranged in that order from the object side to the image face side.
Inventors:
Taro Kushida
Nobuya Kamibayashi
Miyahara Shinji
Nobuya Kamibayashi
Miyahara Shinji
Application Number:
JP2005334128A
Publication Date:
March 28, 2012
Filing Date:
November 18, 2005
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
G02B15/20; G02B13/18
Domestic Patent References:
| JP8248317A | ||||
| JP10148757A | ||||
| JP2002277736A | ||||
| JP2003043356A | ||||
| JP2001350091A |
Attorney, Agent or Firm:
Kenji Yoshida
Jun Ishida
Jun Ishida