Patent ID: 6420694
Filing Date: 2002-07-16
Classification: G01C,G01S,G02B

Abstract:
A steerable retroreflective system comprising:a retroreflector for reflecting at least some light incident thereupon; an optical detector for detecting leakage light that passes through said retroreflector, wherein said optical detector defines a target zone; and means for controllably steering said retroreflector in response to the leakage light detected by said optical detector, wherein said means for controllably steering said retroreflector comprises: at least one positioner for moving said retroreflector; and a controller, responsive to said optical detector, for directing said at least one positioner to controllably steer said retroreflector to follow the incident light in response to the leakage light detected by said optical detector, wherein said controller steers said retroreflector to move the leakage light toward the target zone.