Invention Grant
- Patent Title: Spectroscopic device
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Application No.: US15134950Application Date: 2016-04-21
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Publication No.: US09772225B2Publication Date: 2017-09-26
- Inventor: Norihide Takeyama , Yoshikazu Kanai , Daisuke Fukuoka
- Applicant: GENESIA CORPORATION
- Applicant Address: JP Mitaka-Shi, Tokyo
- Assignee: GENESIA CORPORATION
- Current Assignee: GENESIA CORPORATION
- Current Assignee Address: JP Mitaka-Shi, Tokyo
- Agency: Brinks Gilson & Lione
- Priority: JP2015-086938 20150421
- Main IPC: G01J3/00
- IPC: G01J3/00 ; G01J3/02 ; G02F1/1335 ; G01J3/28 ; G02B13/16

Abstract:
A spectroscope device is provided to maintain the uniformity of the central transmitting wavelength in the field of view and to minimize the broaden of the bandwidth of the transmitting wavelengths in an optical lens using an optical tunable filter (variable wavelength filter), even with a wide field of view and/or a large numerical aperture. A space is defined in which, when each beam that is incident from each off-axial object point on the object surface toward the optical lens that includes a plurality of lens elements between an object surface and a conjugate real image surface reaches the optical tunable filter, the chief ray is maintained parallel to the optical axis. Therefore, if an optical tunable filter is disposed in this space, each beam is always incident normal to the filter, so only the narrow band components at the specific central wavelength can be transmitted.
Public/Granted literature
- US20160370229A1 SPECTROSCOPIC DEVICE Public/Granted day:2016-12-22
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