Title:
光学フィルタ、並びにこれを用いた光学装置及び指紋検出装置
Document Type and Number:
Japanese Patent JP7392412
Kind Code:
B2
Abstract:
To provide an optical filter which suppresses warpage even when being formed into an optical filter having a large area, and has high transmittance of a visible light region and can shield light in a near-infrared ray wavelength region, and an optical device using the optical filter.SOLUTION: The optical filter, which is positioned between a light-emitting element and an imaging element, is arranged with the light-emitting element on a light incident surface side and is used in a state where the imaging element is arranged on a light emission surface side when viewed from a light incident direction, has a resin layer and multilayer films arranged on both surfaces of the resin layer. The resin layer has an absorption layer containing at least one dye having an absorption maximum in a wavelength of 600 nm or more, at least one multilayer film is a reflectance adjustment film, and condition (a): a ratio (hb/ha) of thickness (ha) of the resin layer to total thickness (hb) of the multilayer films of 0.1 or less is satisfied.SELECTED DRAWING: Figure 2
Inventors:
Takuro Shimada
Kazuhiko Shiono
Yuichiro Orita
Motoshi Nakayama
Kazuhiko Shiono
Yuichiro Orita
Motoshi Nakayama
Application Number:
JP2019207415A
Publication Date:
December 06, 2023
Filing Date:
November 15, 2019
Export Citation:
Assignee:
AGC Inc.
International Classes:
G02B5/22; G02B5/28; G03B11/00; H04N23/55; H04N23/56
Domestic Patent References:
| JP2017072748A | ||||
| JP2009003821A | ||||
| JP2013210585A | ||||
| JP2012185468A | ||||
| JP2016071278A |
Foreign References:
| WO2019168090A1 | ||||
| WO2019022069A1 | ||||
| US20170146708 |
Attorney, Agent or Firm:
Patent Attorney Corporation Eiko Office
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