Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PHOTOGRAPHIC LENS, OPTICAL APPARATUS, AND PHOTOGRAPHIC LENS FABRICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2013/179659
Kind Code:
A1
Abstract:
Provided is a photographic lens (ML) comprising a first lens group (G1) having a positive index of refraction, a second lens group (G2) having a negative index of refraction, and a third lens group (G3) having a positive index of refraction, and which is configured such that the second lens group (G2) moves along an optical axis when focusing from an object at infinity to an object at a finite distance. The first lens group (G1) is formed from a frontal group (G1a), and a rear group (G1b) which is separated from the frontal group (G1a) by the longest atmospheric gap within the first lens group (G1). The second lens group (G2) is configured to further comprise a negative lens (L21), and a bonded lens in which a positive lens (22) and a negative lens (23) are bonded in order from the object side.

More Like This:
JP6982276Imaging optical system and imaging device
WO/2020/098328CAMERA LENS
JPH02162316F-THETA LENS
Inventors:
MIWA SATOSHI (JP)
Application Number:
PCT/JP2013/003384
Publication Date:
December 05, 2013
Filing Date:
May 29, 2013
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIKON CORP (JP)
International Classes:
G02B13/00; G03B5/00
Foreign References:
JPH06201989A1994-07-22
JPH08327897A1996-12-13
JPH09325269A1997-12-16
JPH07199123A1995-08-04
JP2011197413A2011-10-06
JP2008164997A2008-07-17
JPH07270724A1995-10-20
JP2012048125A2012-03-08
JPH085907A1996-01-12
JPH09145996A1997-06-06
JP2004126391A2004-04-22
JPH11326754A1999-11-26
Attorney, Agent or Firm:
OHNISHI, Shogo et al. (JP)
Shogo Onishi (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: COMPRESSOR

Next Patent: LIQUID PHENOLIC RESOLE RESIN AND WET PAPER FRICTION MATERIAL