Title:
ZOOM LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/031186
Kind Code:
A1
Abstract:
[Problem] To enable satisfactory correction of distortion aberrations and various other aberrations in a more compact zoom lens having a two-lens configuration. [Solution] A zoom lens: having a first lens group (G1) having a negative refractive power and a second lens group (G2) having a positive refractive power, arranged in order from the object side; that changes magnification by moving the first lens group (G1) and the second lens group (G2); and wherein the first lens group (G1) is configured by a first lens (L11) having a negative refractive power, a second lens (L12) having a positive refractive power, a third lens (L13) having a negative refractive power, and a fourth lens (L14) having a positive refractive power, arranged in order from the object side. The zoom lens fulfills the following formula, when the focal distance of the entire system in the wide angle end is fw, and the focal distance of the second lens group (G2) is f2: 0.00< fw/f2<0.35 … (1-1)
Inventors:
SAITO HIROKI (JP)
CHO MICHIO (JP)
CHO MICHIO (JP)
Application Number:
PCT/JP2012/005381
Publication Date:
March 07, 2013
Filing Date:
August 28, 2012
Export Citation:
Assignee:
FUJIFILM CORP (JP)
SAITO HIROKI (JP)
CHO MICHIO (JP)
ITO TORU (JP)
SAITO HIROKI (JP)
CHO MICHIO (JP)
ITO TORU (JP)
International Classes:
G02B15/16; G02B13/18
Foreign References:
| JP2000081571A | 2000-03-21 | |||
| US6268964B1 | 2001-07-31 | |||
| JPH11223768A | 1999-08-17 |
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (JP)
Seiji Yanagida (JP)
Seiji Yanagida (JP)
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Claims: