Focused laser doppler velocimeter

A system for remotely measuring velocities present in discrete volumes of air in which a CO2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range, near field, of the telescope. The back scatter, or reflected light, principally from the focal volume, p...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	FLETCHER, JAMES C. ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, WITH RESPECT TO AN INVENTION OF, HUFFAKER, ROBERT M, KRAUSE, MICHAEL C, THOMSON, JAMES A. L, JELALIAN, ALBERT V, CAMPBELL, JR., RONALD B, WILSON, DAVID J, BILBRO, JAMES W, KEENE, WAYNE H, SONNENSCHEIN, CHARLES M, LAWRENCE, THOMAS R, DAHM, WERNER K, JEFFREYS, HAROLD B
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING
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Beschreibung
Zusammenfassung:	A system for remotely measuring velocities present in discrete volumes of air in which a CO2 laser beam is focused by a telescope at such a volume, a focal volume, and within the focusable range, near field, of the telescope. The back scatter, or reflected light, principally from the focal volume, passes back through the telescope and is frequency compared with the original frequency of the laser, and the difference frequency or frequencies represent particle velocities in that focal volume.