Patent ID: 7379641
Filing Date: 2008-05-27
Classification: G01R,G02B

Abstract:
1. A method of aligning a fixture to a substrate, comprising: a) providing at least one illumination fiber coupled at a first end thereof to a light source, and a plurality of receiver fibers, each receiver fiber coupled, at a respective first end thereof, to a corresponding detector; b) illuminating at least a portion of a substrate surface with light from a second end of the at least one illumination fiber; c) receiving light reflected from the substrate surface at the respective second ends of the receiver fibers, and receiving, at the detectors, a light signal from each of a plurality of receiver fibers; d) determining an amplitude of the light signal from each of the plurality of receiver fibers; and e) generating, if the determination of (d) is that the amplitude of the light signal from each of the plurality of receiver fibers is above a first predetermined threshold, and is substantially equal, a first signal, the first signal indicating that alignment is complete.