Title:
LENS BARREL, IMAGING DEVICE MAIN BODY, AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/039147
Kind Code:
A1
Abstract:
Provided are a lens barrel, an imaging device main body, and an imaging device, with which variation in a defocused image of an oblique light beam produced by an apodization (APD) filter can be reduced. The lens barrel (10) is equipped with: a first lens optical system (12) and a second lens optical system (13), as a lens optical system that includes a focus lens; a diaphragm (16) that emits light after changing the intensity of incident light; a first APD filter (17) arranged on the light incidence side of the diaphragm (16); and a second APD filter (18) arranged on the light emission side of the diaphragm (16). By means of the first APD filter (17) and the second APD filter (18), the amount of light reduction of an upper light ray (L1) and the amount of light reduction of a lower light ray (L2) in an oblique light beam are substantially identical, thereby reducing variation in a defocused image.
Inventors:
FURUTA YOSHINORI (JP)
AOKI TAKASHI (JP)
AOKI TAKASHI (JP)
Application Number:
PCT/JP2015/074047
Publication Date:
March 17, 2016
Filing Date:
August 26, 2015
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/02; G02B5/00; G03B11/00
Foreign References:
| JPS50142231A | 1975-11-15 | |||
| JPH10268382A | 1998-10-09 |
Attorney, Agent or Firm:
KYORITSU INSTITUTE (JP)
Patent business corporation Kobayashi international patent firm (JP)
Patent business corporation Kobayashi international patent firm (JP)
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