Title:
光学フィルターおよびその用途
Document Type and Number:
Japanese Patent JP7331635
Kind Code:
B2
Abstract:
To provide an optical filter with which the incident angle dependency of noise amount due to solar light is small even when an incident angle is large, and a change of transmission wavelength is small even at a temperature change time.SOLUTION: An optical filter of the present invention includes a substrate and a dielectric multilayer and passes at least a portion of near-infrared light. In wavelengths 300-1200 nm, the optical filter satisfies requirements (A) and (B): (A) the maximum transmittance T(%), in wavelength range 900-1060 nm, of a beam of light entering one face of the optical filter at an angle θ (θ being 0 and 30) from the vertical direction is 50% or greater; (B) when the wavelength of a beam of light entering one face of the optical filter at an angle θ from the vertical direction, where T(%) holds, is assumed to be λ(nm) and the shortest wavelength, where transmittance in longer wavelength regions than the λ(nm) is 50% ore greater, is assumed to be λB(nm), then |λB-λB|≤10.SELECTED DRAWING: None
Inventors:
Hiroyuki Kishida
Application Number:
JP2019200049A
Publication Date:
August 23, 2023
Filing Date:
November 01, 2019
Export Citation:
Assignee:
JSR Corporation
International Classes:
G02B5/28; G03B11/00; H01L27/146
Domestic Patent References:
| JP2012137728A | ||||
| JP2019191566A |
Foreign References:
| WO2017213047A1 | ||||
| WO2015056734A1 | ||||
| WO2016098810A1 | ||||
| WO2019039386A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation SS International Patent Office
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