Title:
OPTICAL DEVICE AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/024619
Kind Code:
A1
Abstract:
Provided are an optical device and an imaging device that make it possible to shorten the time it takes to correct axial chromatic aberration. An imaging optical system (20) of a lens barrel (11) comprises a filter unit (31, 70, 90) and a focus lens (26). The filter unit (31, 70, 90) has a plurality of filters (F1, F2, F3, F4) that selectively transmit light of a preset wavelength band. The plurality of filters (F1, F2, F3, F4) are inserted into an optical path in a prescribed order. The focus lens (26) moves along an optical axis (OA) and thereby corrects the axial chromatic aberration of the plurality of types of light that have respectively passed through the plurality of filters (F1, F2, F3, F4). The prescribed order corresponds to the movement direction of the focus lens (26).
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Inventors:
SHIMOTSU SHINICHI (JP)
SUGIMOTO MASAHIKO (JP)
FUJIKAWA TETSUYA (JP)
AOI TOSHIHIRO (JP)
SUGIMOTO MASAHIKO (JP)
FUJIKAWA TETSUYA (JP)
AOI TOSHIHIRO (JP)
Application Number:
PCT/JP2021/024044
Publication Date:
February 03, 2022
Filing Date:
June 24, 2021
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/08; G02B7/16; G03B11/00; G03B17/12; H04N5/225
Domestic Patent References:
| WO2020095513A1 | 2020-05-14 |
Foreign References:
| JPH11305107A | 1999-11-05 | |||
| JP2006033716A | 2006-02-02 | |||
| JP2006162757A | 2006-06-22 |
Attorney, Agent or Firm:
NAKASHIMA Junko et al. (JP)
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