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Title:
OPTICAL COHERENT TOMOGRAPHIC UNIT, VARIABLE-WAVELENGTH LIGHT GENERATOR USED THEREFOR, AND VARIABLE-WAVELENGTH LIGHT-EMITTING LIGHT SOURCE
Document Type and Number:
Japanese Patent JP2006047264
Kind Code:
A
Abstract:

To enhance the resolution of an OCT signal in an optical coherent tomography unit, and to prevent side lobes from increasing.

This optical coherent tomographic unit uses as a light source thereof a switch light source (variable-wavelength light generator) 131, having a light-emitting part 43 for outputting combined outputs from a plurality of variable-wavelength light sources 41 different in wavenumber sweeping ranges, and a controller 44 allowing wavenumber sweeping exceeding the wavenumber sweeping range of the individual variable-wavelength light source 41, by sweeping the variable-wavelength light sources one by one. The switching light source (variable-wavelength light generator) is constituted to have the light-emitting part for outputting integrally the outputs from the plurality of variable-wavelength light sources different in wavenumber sweeping ranges, and the controller for allowing the wavenumber sweeping to compensate each other output wavenumbers of the individual variable-wavelength light sources 41, by sweeping the variable-wavelength light sources one by one.


Inventors:
OBAYASHI KOJI
SHIMIZU KIMIYA
MIYAZAWA TAKEO
YOSHIMURA RYOKO
Application Number:
JP2004332764A
Publication Date:
February 16, 2006
Filing Date:
November 17, 2004
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
KITASATO GAKUEN
International Classes:
G01N21/17; G01N21/01; H01S3/00
Domestic Patent References:
JP3471788B12003-12-02
JPH07106548A1995-04-21
Attorney, Agent or Firm:
Toshiro Mitsuishi
Yasuyuki Tanaka
Hiroshi Matsumoto