Method and apparatus for three-dimensional object detection

Details Method and apparatus for three-dimensional object detection Method and apparatus for three-dimensional object detection

2006-06-13

2006-06-13

Turner, Samuel A. (Department: 2877)

Optics: measuring and testing

By light interference

Having light beams of different frequencies

Reexamination Certificate

active

07061620

ABSTRACT:
A fundamental concept of the invention consists thus in the fact that temporally variable reference and object light bundles are generated for object detection, the bundles are superimposed at a light receiver and detected beam by beam and the penetration of the object by selected beams is determined in response to the temporal variability of the superimposed beams.

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Nakamura, K. et al.:Optical Frequency Domain Ranging by a Frequency-Shifted Feedback LaserIEEE Journal of Quantum Electronics, IEEE, Inc., New York, Mar. 2000.
Nakamura, K. et al:Spectral Characteristics of an All Solid-State Frequency-Shifted Feedback LaserIEEE Photonics Technology Letters, IEEE, Inc., New York, 1997.
Nakamura, K. et al.:A New Technique of Optical Ranging by a Frequency-Shifted Feedback LaserIEEE Photonics Technology Letters, IEEE, Inc., New York, Dec. 1998.
Nakamura, K. et al.:Observation of a Highly Phase-Correlated Chirped Frequency Comb Output From a Frequency-Shifted Feedback LaserApplied Physics Letters, May 25, 1998.

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