Invention Application
- Patent Title: OPTICAL FILTER AND LIGHT-EMITTING DEVICE
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Application No.: US17286884Application Date: 2019-10-23
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Publication No.: US20210382214A1Publication Date: 2021-12-09
- Inventor: Shunichi KAJIYA , Hiroshi TAZAWA , Kazuhiko NODA , Kyoko SAKURAI
- Applicant: Dexerials Corporation
- Applicant Address: JP Shinagawa-ku, Tokyo
- Assignee: Dexerials Corporation
- Current Assignee: Dexerials Corporation
- Current Assignee Address: JP Shinagawa-ku, Tokyo
- Priority: JP2018-200171 20181024,JP2019-055115 20190322
- International Application: PCT/JP2019/041538 WO 20191023
- Main IPC: G02B5/22
- IPC: G02B5/22

Abstract:
Provided is an optical filter having different color correction effects for specific wavelength regions depending on the angle of incident light. The optical filter includes a transmission portion transmitting light and an absorption portion absorbing light between a plane of incidence and a plane of emission, and the volume of the transmission portion is larger than the volume of the absorption portion. For the optical filter, when the transmission spectrum S0 of light incident at 0° and the transmission spectrum S60 of light incident at 60° are superimposed, the transmittance (%) at 60° is lower than the transmittance (%) at 0° by 15% or more for a first wavelength band, and the difference between the transmittance (%) at 60° and the transmittance (%) at 0° is lower by 10% or more less for a second wavelength band.
Public/Granted literature
- US12099221B2 Optical filter and light-emitting device Public/Granted day:2024-09-24
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