Patent ID: 8461514
Filing Date: 2013-06-11
Classification: G01D

Abstract:
1. An apparatus for the measurement of absolute position comprising: a sensor head with a rotating shaft; a disc mounted on said rotating shaft having printed thereon a non-repeating binary code pattern circularly arranged; a controller connected to said sensor through at least one fiber optic line; an optical power source contained in said controller that sends optical power to said sensor head through said at least one fiber optic line wherein said optical power is being spatially dispersed in its optical spectrum along the binary code pattern wherein information regarding the position of said rotating shaft is imprinted by the binary code pattern into the spectrum of the optical power wherein the spectral components of the light are being re-collected and returned to said controller through said at least one fiber optic line wherein the optical signal is processed in said controller and absolute position is being retrieved from said optical signal.