Sub miniaturized laser doppler velocimeter sensor

Details Sub miniaturized laser doppler velocimeter sensor Sub miniaturized laser doppler velocimeter sensor

2001-08-06

2003-08-19

Buczinski, Stephen C. (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

C356S028500

Reexamination Certificate

active

06608668

ABSTRACT:

BACKGROUND OF INVENTION
Non contact particle sensors are known, and have been described in patents and in the literature. A commercially available laser Doppler velocimeter may include a gas laser and discrete optics. This has often resulted in relatively large and nonportable instruments. The instruments may be unsuitable for harsh environments since they are subject to misalignment.
Diode based laser the velocimeters have been suggested. This may result in miniaturization of the probes and better integration of the structure. Existing probes, however, often require beam alignment for the transmitting optics. This may result in complex optical mechanical system design. This may also be prone to misalignment due to vibration and temperature changes.
SUMMARY OF INVENTION
The present system describes a self-contained rugged sensor probe used for measuring the speed of moving particles and objects that are located at a fixed distance from a housing of the probe. The probe may operate properly without moving parts, and with a minimal number of optical components. The inherent design of the system may operate without calibration, allowing it to be used in hostile environments. The probe may also be sealed and self-contained, allowing more flexibility in its use. For example, ultraviolet and other sterilization techniques may be used when the system is used for biomedical applications.


REFERENCES:
patent: 5557396 (1996-09-01), Ishizuka et al.
patent: 5587785 (1996-12-01), Kato et al.
patent: 6075600 (2000-06-01), Nagano et al.
patent: 6323949 (2001-11-01), Lading et al.

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