Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1996-08-19
1998-03-24
Font, Frank G.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359632, 359201, 359202, G02B 2714
Patent
active
057319022
ABSTRACT:
A dual camera test fixture that allows quantitative optical performance measurements to be made on a combiner, which is the primary optical element of a head-up display optical system. The fixture replicates an embodiment of the head-up display system, with the cameras in place of a users eyes. This configuration allows quantitative optical measurements to be made, just as the user would observe them. The test fixture makes quantitative measurements of the optical performance of individual combiners. The measurements that are made are binocular, and the measurement time is less than one minute per combiner. The test fixture determines actual coordinates of an image produced by the combiner. These coordinates allow accurate and quantitative calculations regarding the combiner to be made including vertical disparity, image distance, percent distortion, and image size. The cameras are adjustable in a manner that simulates the motion of human eyes as well as the motion of the human head. A calibration mode that is part of an operational software program is used with calibration targets and allows the cameras to be precisely positioned. This also minimizes measurement error, and provides for excellent repeatability from lot to lot and day to day.
REFERENCES:
patent: 5334991 (1994-08-01), Wells et al.
patent: 5381267 (1995-01-01), Woody
patent: 5384654 (1995-01-01), Iba
Hart, nee Morgan Darcy J.
Kinoshita Michael
Williams Robert D.
Delco Electronics Corporation
Font Frank G.
Funke Jimmy L.
Ratliff Reginald A.
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