Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Reexamination Certificate
2006-07-18
2006-07-18
Tarcza, Thomas H. (Department: 3662)
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
C356S028000, C356S004060, C356S004080
Reexamination Certificate
active
07079228
ABSTRACT:
Combined laser-based apparatus for determining both altitude and ground velocity of an aircraft comprises: a laser source for emitting pulsed laser beams substantially at a predetermined wavelength; a plurality of first optical elements for directing the laser beams from a first optical path to a second optical path which exits the first optical elements; a plurality of second optical elements configured to form a telescope, the second optical path and telescope field of view being fixedly co-aligned; an optical scanner for directing the second optical path and telescope field of view to desired ground positions while maintaining the co-alignment thereof; the telescope for receiving Doppler wavelength shifted reflections of the pulsed laser beams and directing the received ground reflections substantially over a third optical path; an optical filter element for separating the ground reflections of the third optical path into first and second portions that are dependent on the Doppler wavelength shift of the ground reflections; and processing means for determining altitude and ground velocity of the aircraft based on the first and second portions.
REFERENCES:
patent: 6665063 (2003-12-01), Jamieson et al.
patent: 6717655 (2004-04-01), Cheng et al.
patent: 6894768 (2005-05-01), Caldwell et al.
patent: 2003/0043058 (2003-03-01), Jamieson et al.
Halama Gary E.
Jamieson James R.
Meneely Clinton T.
Alsomiri Isam
Calfee Halter & Griswold LLP
Hernandez Peter M.
Rosemount Aerospace Inc.
Tarcza Thomas H.
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