Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LENS, ZOOM LENS, AND IMAGING LENS
Document Type and Number:
WIPO Patent Application WO/2018/155404
Kind Code:
A1
Abstract:
The present invention provides a lens, a zoom lens, and an imaging lens, the lens enabling elimination of an annular blur without causing a decrease in resolution or an increase in processing man-hours. A lens 1 has random recesses and protrusions within an optical effective diameter D of an optical surface 2, an arithmetic average roughness Ra within the optical effective diameter D of the optical surface 2 is 20-50 nm inclusive, the average value of widths W of protrusions 3 of the recesses and protrusions on an average line C2 of a roughness curve C1 of the optical surface 2 is 1/200-1/50 inclusive of the optical effective diameter D of the optical surface 2. This lens 1 is suitably used as a lens constituting a zoom lens or an imaging lens.

Inventors:
ITO Kenji (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
SASAKI Toshio (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
KONISHI Masayasu (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
CHO Michio (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
Application Number:
JP2018/005873
Publication Date:
August 30, 2018
Filing Date:
February 20, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G02B3/02; G02B13/00; G02B13/18; G02B15/167; G02B15/20
Domestic Patent References:
WO2014171513A12014-10-23
WO2016068297A12016-05-06
Foreign References:
JP2010101919A2010-05-06
JP2012098595A2012-05-24
JP2007233002A2007-09-13
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (6F FFTP M0 BLDG, 1250 Takematsu Minamiashigara-sh, Kanagawa 11, 〒2500111, JP)
Download PDF: