Invention Grant
- Patent Title: IR cut filter
- Patent Title (中): 红外线滤光片
-
Application No.: US13322504Application Date: 2011-05-27
-
Publication No.: US08693089B2Publication Date: 2014-04-08
- Inventor: Hideshi Saitoh , Manabu Ohnishi
- Applicant: Hideshi Saitoh , Manabu Ohnishi
- Applicant Address: JP Kakogawa-shi
- Assignee: Daishinku Corporation
- Current Assignee: Daishinku Corporation
- Current Assignee Address: JP Kakogawa-shi
- Agency: Mots Law, PLLC
- Agent Marvin A. Motsenbocker
- Priority: JP2010-139686 20100618
- International Application: PCT/JP2011/062225 WO 20110527
- International Announcement: WO2011/158635 WO 20111222
- Main IPC: F21V9/04
- IPC: F21V9/04 ; G02B5/22 ; G02B5/26 ; G02B5/20

Abstract:
An IR cut filter includes an infrared light absorber to absorb infrared light, and an infrared light reflector to reflect infrared light. The infrared light absorber has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 620 to 670 nm. The infrared light reflector has a light transmission property of 50% transmittance with respect to a wavelength in a wavelength band of 670 to 690 nm. The wavelength with respect to which the infrared light reflector has the 50% transmittance is longer than the wavelength with respect to which the infrared light absorber has the 50% transmittance. A combination of the infrared light absorber and the infrared light reflector provides a light transmission property of 50% transmittance with respect to a wavelength in the 620 to 670 nm wavelength band and less than 5% transmittance with respect to a 700 nm wavelength.
Public/Granted literature
- US08649087B2 IR cut filter Public/Granted day:2014-02-11
Information query