Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1996-07-10
1998-09-22
Font, Frank G.
Optics: measuring and testing
By polarized light examination
With light attenuation
3561411, 180169, 2502061, G01B 1114
Patent
active
058122672
ABSTRACT:
An optically based position location system, comprises multiple reflectors ositioned at known locations in an environment; a vehicle for traveling along a path in the environment; a first sensor for generating and detecting a collimated and polarized first light signal reflected from one of the reflectors, and for generating a first output signal in response to detecting the first light signal; a second sensor for generating and detecting a collimated and polarized second light signal reflected from the reflector reflecting the first light signal, and for generating a second output signal in response to detecting the second light signal; and a data processor which uses the first and second output signals for determining the distance between a reference coordinate on the vehicle and the reflector.
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Everett, Jr. Hobart R.
Gilbreath Gary A.
Holland John M.
Inderieden Rebecca S.
Tran Theresa T.
Fendelman Harvey
Font Frank G.
Kagan Michael A.
Lipovsky Peter A.
Smith Zandra V.
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