Optics: measuring and testing – By light interference – Having light beams of different frequencies
Reexamination Certificate
2005-11-03
2008-03-18
Turner, Samuel A. (Department: 2877)
Optics: measuring and testing
By light interference
Having light beams of different frequencies
C356S497000
Reexamination Certificate
active
07345770
ABSTRACT:
An optical image measuring apparatus capable of speedily measuring a velocity distribution image of a moving matter. Including a broad-band light source, lenses for increasing a beam diameter, a polarizing plate converting the light beam to linearly porlarized light, and a half mirror, a wavelength plate converting the reference light to circularly polarized light, the half mirror superimposing the signal light whose frequency is partially shifted by the moving matter in the object and the reference light is circularly polarized light to produce superimposed light including interference light, CCDs for receiving different polarized light components of the interference light, and outputting detection signals including interference frequency components corresponding to beat frequencies of the interference light, and a signal processing portion for forming velocity distribution image based on interference frequency component corresponding to a beat frequency equal to an intensity modulation frequency of the light beam.
REFERENCES:
patent: 5501226 (1996-03-01), Petersen et al.
patent: 5991697 (1999-11-01), Nelson et al.
patent: 6465147 (2002-10-01), Lee et al.
patent: 6944551 (2005-09-01), Chen et al.
patent: 7095503 (2006-08-01), Kim et al.
patent: 2001-330558 (2001-11-01), None
patent: 2001-526650 (2001-12-01), None
patent: 2002-504894 (2002-02-01), None
patent: 2002-214130 (2002-07-01), None
N. Tanno; “Optical coherence tomography and its application to living-body imaging;”Kogaku(Japanese Journal of Optics); vol. 28; No. 3; 1999; pp. 116-125, Cover page and partial translation (9 Sheets total.)/Discussed in the specification.
T. Nakajima; “Principle and application of the optical heterodyne method;”Optical Heterodyne Technology(revised edition)New technology communications; 2003; pp. 1-10, Cover page and partial translation (9 Sheets total).
K.P. Chan, et al; “Micrometre-resolution, optical imaging of objects through highly scattered media using a heterodyne detector array;”Electronics Letters; vol. 30; No. 21; Oct. 13, 1994; pp. 1753-1754./Discussed in the specification.
A. Major, et al.; “Microvascular Photodynamic Effects Determined In Vivo Using Optical Doppler Tomography;”IEEE Journal of Selected Topics in Quantum Electronics; vol. 5; No. 4; Jul./Aug. 1999; pp. 1168-1175 (4 Sheets total.)/Discussed in the specification.
M. Akiba, et al.; “Real-Time, Micrometer Depth-Resolved Imaging by Low-Coherence Reflectometry and a Two-Dimensional Heterodyne Detection Technique;”Jpn. J. Appl. Phys.; vol. 39; 2000; pp. L1194-L1196 (3 Sheets total.)/Discussed in the specification.
Akiba Masahiro
Chan Kinpui
Fukuma Yasufumi
Edwards Angell Palmer & & Dodge LLP
Kabushiki Kaisha Topcon
Turner Samuel A.
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