Title:
OPTICAL ELEMENT WITH ANTIREFLECTION STRUCTURE, METHOD FOR MANUFACTURING THE SAME, METHOD FOR MANUFACTURING MOLD FOR MANUFACTURE, AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2020024243
Kind Code:
A
Abstract:
To provide an optical element or the like which has an antireflection function excellent in incident angle characteristics and can be easily formed by a press molding method, in the optical element having an antireflection structure on a surface.SOLUTION: There is provided an optical element 2 or the like including the antireflection structure on a lens surface, the antireflection structure comprising a plurality of fine cylindrical projections 3 provided on the lens surface. When the projection distance in the optical axis direction of the fine cylindrical projection of an arbitrary position is defined as h and the projection distance in the optical axis direction of the fine cylindrical projection located in the central part of the lens surface is defined as h, the antireflection structure satisfies the following conditional expression.SELECTED DRAWING: Figure 1
Inventors:
HOSOYA SHIGEKI
KUNISADA TERUFUSA
KURIHARA RYOICHI
MIYAHARA MASAAKI
KUNISADA TERUFUSA
KURIHARA RYOICHI
MIYAHARA MASAAKI
Application Number:
JP2018147425A
Publication Date:
February 13, 2020
Filing Date:
August 06, 2018
Export Citation:
Assignee:
TAMRON KK
International Classes:
G02B1/118; B29C33/38; G02B1/00; H04N5/225
Domestic Patent References:
| JP2007127855A | 2007-05-24 | |||
| JP2010072484A | 2010-04-02 | |||
| JP2013105054A | 2013-05-30 |
Foreign References:
| WO2013150742A1 | 2013-10-10 | |||
| WO2013150744A1 | 2013-10-10 | |||
| US20180172961A1 | 2018-06-21 |
Attorney, Agent or Firm:
Katsuhiro Yoshimura
Hiroko Negishi
Hiroko Negishi