Title:
光学フィルタ
Document Type and Number:
Japanese Patent JP7215476
Kind Code:
B2
Abstract:
This invention pertains to an optical filter (1) comprising: a transparent substrate (10); and three or more thin-film laminated structures (11), (12) and (13) which respectively restrict the passage of light having predetermined wavelength ranges within the near-infrared wavelength region. Each of the thin-film laminated structures is laminated on one surface of the transparent substrate (10), and the wavelength ranges for which the passage of light is restricted are different to one another for at least two of the three or more thin-film laminated structures (11), (12) and (13). The wavelength ranges for which the passage of light is restricted by the three or more thin-film laminated structures (11), (12) and (13) are contiguous, and the wavelength regions for which the passage of light is restricted by the thin-film laminated structures (11) and (13) positioned on the same side of the transparent substrate (10) are not contiguous.
Inventors:
Mitsuyuki Tatemura
Application Number:
JP2020510830A
Publication Date:
January 31, 2023
Filing Date:
March 25, 2019
Export Citation:
Assignee:
AGC Inc.
International Classes:
G02B5/26; B32B7/023; G02B5/22; G02B5/28
Domestic Patent References:
| JP2015011319A | ||||
| JP2015111241A | ||||
| JP2009217138A | ||||
| JP2007183525A |
Foreign References:
| WO2016171219A1 | ||||
| WO2013179902A1 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito