Invention Grant
- Patent Title: Optical filter, optical filter module, spectrometric measurement apparatus, and optical apparatus
- Patent Title (中): 光滤波器，光滤波器模块，光谱测量装置和光学装置
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Application No.: US13922639Application Date: 2013-06-20
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Publication No.: US08982350B2Publication Date: 2015-03-17
- Inventor: Takeshi Nozawa
- Applicant: Seiko Epson Corporation
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2010-158876 20100713
- Main IPC: G01N21/25
- IPC: G01N21/25 ; G01J3/51 ; G01J3/26 ; G02B26/00
Abstract:
An optical filter includes a first variable wavelength bandpass filter that extracts light of a first wavelength band and has first and second spectral bands and a second variable wavelength bandpass filter that extracts light of a second wavelength band adjacent to the first wavelength band and has third and fourth spectral bands. Part of the period during which the light of the first spectral band is extracted overlaps with the period during which the light of the third spectral band is extracted, and part of the period during which the light of the second spectral band is extracted overlaps with the period during which the light of the fourth spectral band is extracted.
Public/Granted literature
- US20130278933A1 OPTICAL FILTER, OPTICAL FILTER MODULE, SPECTROMETRIC MEASUREMENT APPARATUS, AND OPTICAL APPARATUS Public/Granted day:2013-10-24
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