OPTICAL SYSTEM IN A LASER GUIDANCE SYSTEM

摘要

An apertured mirror permits an outgoing, transmitted laser beam to pass and reflects a return, reflected beam onto a detector array. A gimballed optical system within a seeker head inlcudes a relatively low power laser coupled to a relatively higher power laser by way of a flexible fiber optic cable to reduce the mass that must be oscillated in a scan. An optical device within the laser radar transmitter uses successive calcite wedges for segmenting the emitted beam into multiple, diverging beams which define a fan-shaped pattern of overlapping beams. The calcite wedges are arrayed coaxially along the optical path, and a series of 1/4 wave retarders are interposed between adjacent wedges to reestablish circular polarization.