Determining position with light

Details Determining position with light Determining position with light

G - Physics

01

B

88/97.7

G01B 11/02 (2006.01) G01D 5/26 (2006.01)

Patent

CA 2001368

Abstract Determining Position With Light The invention teaches determining position with light by providing amplitude modulated input light at an input light port of an optical cavity having a variable length dimension, detecting light at an output light port of the optical cavity and varying the frequency of amplitude modulation until a peak is detected. The maximizing frequency can then be related to the length of the cavity. The cavity may comprise an optical fiber inserted into a variable length cavity filled with a liquid having an index of refraction which matches that of the fiber. Mirrors may be placed at either end of the cavity. H1910-GC - 24 -

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