Title:
レーザ光学フィードバック断層撮影センサ及び方法
Document Type and Number:
Japanese Patent JP2008545500
Kind Code:
A
Abstract:
The invention relates to a modified Laser Optical Feedback Tomography sensor ( 10 ) which comprises an evaluator ( 16 ) for the determination of an object velocity (vz) relative to the sensor ( 10 ). The primary optical frequency (fo) of light emitted by a laser ( 11 ) is shifted by a first frequency shift F in a frequency shifter ( 13 ) and focused into an investigation region ( 3 ). A moving object ( 2 ) in said region produces an additional Doppler frequency shift DeltaF in the light sent back from the investigation region ( 3 ) which is re-injected into the laser ( 11 ). Resulting intensity oscillations of the laser ( 11 ), which critically depend on the shifted frequency of the re-injected light, are detected by a detector ( 15 ). Finally, the evaluator ( 16 ) coupled to the detector ( 15 ) determines from the observed oscillations the Doppler frequency shift DeltaF and therefrom the moving velocity (Vz) of the object ( 2 ).
More Like This:
Inventors:
Krugel Sasca
Nielcentim
Nielcentim
Application Number:
JP2008515343A
Publication Date:
December 18, 2008
Filing Date:
June 01, 2006
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
A61B1/00; A61M25/00; G01F1/00; G01N21/17; G01P3/36; G01P5/00; G01S17/58
Foreign References:
| WO2005009233A1 | 2005-02-03 |
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen
Akihiko Miyazaki
Fueda Shusen