Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1995-02-16
1997-03-11
Buczinski, Stephen C.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
356 509, G01P 336
Patent
active
056107056
ABSTRACT:
A heterodyne velocimeter system includes an illumination laser that illuminates a moving object with a coherent, laser beam. The laser illumination is reflected from the object as separate wavefronts (referred to as the signal light) and is passed through a range-focus lens pair, a polarizer element and through a partially reflective, partially transmissive element onto a plurality of separate light sensitive elements of a sensor which are referred to as pixels. A second source of laser illumination, such as a second laser provides a reference light beam that is directed onto a local oscillator scatter mask. The light beam from the second laser is scattered into separate wavefronts by the scatter mask and they are focussed by a lens onto the partially reflective partially transmissive element which reflects them onto the separate pixels of the sensor where they are individually mixed with the separate signal light wavefronts from the object. Thus light reflected from the other points of the moving object are similarly directed as signal light onto the pixels of the sensor and mixed with corresponding reference light wavefronts from the scatter mask to provide a two-dimensional array of emission points from local oscillator scatter mask is imaged onto the sensor to serve as the local oscillator for the reflected wavefronts at each pixel.
REFERENCES:
patent: 4195311 (1980-03-01), Moran
patent: 4515472 (1985-05-01), Welch
patent: 4707698 (1987-11-01), Constant
patent: 4715707 (1987-12-01), Reynolds, III et al.
patent: 4822164 (1989-04-01), Breen
patent: 4919536 (1990-04-01), Komine
patent: 5110207 (1992-05-01), Harris
patent: 5123730 (1992-06-01), Holmes et al.
patent: 5150170 (1992-09-01), Morris
patent: 5164948 (1992-11-01), Nettleton et al.
patent: 5187538 (1993-02-01), Iwamoto et al.
patent: 5192979 (1993-03-01), Grage et al.
patent: 5216477 (1993-06-01), Korb
patent: 5229830 (1993-07-01), Ishida et al.
patent: 5233403 (1993-08-01), Mermelstein
patent: 5353109 (1994-10-01), Langdon et al.
patent: 5485009 (1996-01-01), Meyzonnetie et al.
Brosnan Stephen J.
Komine Hiroshi
Anderson Terry J.
Buczinski Stephen C.
Hoch Jr. Karl J.
Northrop Grumman Corporation
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