Title:
OPTICAL FILTER AND OPTICAL DEVICE
Document Type and Number:
Japanese Patent JP2020056874
Kind Code:
A
Abstract:
To provide an optical filter capable of preventing an increase in size of an image capturing device as much as possible and acquiring good images using visible and infrared light.SOLUTION: An optical filter provided herein consists of a first cut film configured to block light in a predetermined wavelength range, a second cut film configured to block light in a wavelength range on the longer wavelength side relative to the wavelength range of the first cut film, and a third cut film configured to block light in a wavelength range on the longer wavelength side relative to the wavelength ranges of the first and second cut films, the first and second cut films being disposed on different areas in a single plane of a substrate, and the third cut film being formed across the areas of the first and second cut films in a thickness direction of the substrate.SELECTED DRAWING: Figure 1
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Inventors:
SATO YASUHIRO
Application Number:
JP2018186592A
Publication Date:
April 09, 2020
Filing Date:
October 01, 2018
Export Citation:
Assignee:
CANON DENSHI KK
International Classes:
G02B5/28; G02B5/26; G03B11/00; H04N5/225; H04N5/238
Domestic Patent References:
| JP2013174818A | 2013-09-05 | |||
| JP2013176018A | 2013-09-05 | |||
| JP2011237638A | 2011-11-24 |
Foreign References:
| US5072109A | 1991-12-10 | |||
| WO2018155486A1 | 2018-08-30 | |||
| WO2017200007A1 | 2017-11-23 |