Title:
OPTICAL MEASUREMENT DEVICE, LIGHT SPECTRUM FILTER, AND METHOD FOR MANUFACTURING LIGHT SPECTRUM FILTER
Document Type and Number:
WIPO Patent Application WO/2017/158808
Kind Code:
A1
Abstract:
In a method for performing spectrum control on Stokes light, among the CARS measurement methods, a spectrum control unit is configured using a grating and a spatial filter, and thus the spectrum control unit is large in size, and moreover precise optical adjustment is necessary, for example. Therefore, the present invention uses a waveguide-type wavelength filter having a predetermined periodic structure so that the shape of a spectrum can be easily controlled using a small device. To form the wavelength filter, femtosecond laser machining having a high degree of freedom of control is used.
Inventors:
IMAI RYO (JP)
MINEMURA HIROYUKI (JP)
WATANABE KOICHI (JP)
MINEMURA HIROYUKI (JP)
WATANABE KOICHI (JP)
Application Number:
PCT/JP2016/058624
Publication Date:
September 21, 2017
Filing Date:
March 18, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
G01J3/44; G01N21/65; G02F1/35
Foreign References:
| JP2015536467A | 2015-12-21 | |||
| JP2004258411A | 2004-09-16 | |||
| JP2002043681A | 2002-02-08 | |||
| JP2007025603A | 2007-02-01 | |||
| JP2004198766A | 2004-07-15 | |||
| JP2001053680A | 2001-02-23 | |||
| JP2000131145A | 2000-05-12 |
Other References:
JEAN REHBINDER ET AL.: "Multiplex coherent anti-Stokes Raman microspectroscopy with tailored Stokes spectrum", OPTICS LETTERS, vol. 35, no. 22, 2010, pages 3721 - 3723, XP001559085
Attorney, Agent or Firm:
TODA Yuji (JP)
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