초록 ▼

A scanning system combining active and passive detection of radiation from targets. In the active mode, a laser beam is scanned with a rotating wedge in a downward looking Palmer pattern, a portion of the beam is reflected from targets, and coherent detection is performed on the returned signals. Me

A scanning system combining active and passive detection of radiation from targets. In the active mode, a laser beam is scanned with a rotating wedge in a downward looking Palmer pattern, a portion of the beam is reflected from targets, and coherent detection is performed on the returned signals. Means is disclosed for automatically compensating for misalignment between the signal return beam and local reference beam upon the coherent detector. In the passive mode, infrared radiation inherently emitted by targets is also detected.

대표청구항 ▼

An active-passive scanning system comprising in combination: a source of coherent light; a rotating wedge for producing a scanning beam with said coherent light; active detecting means; means for producing a reference beam from a portion of said coherent light; means for receiving a signal return be

An active-passive scanning system comprising in combination: a source of coherent light; a rotating wedge for producing a scanning beam with said coherent light; active detecting means; means for producing a reference beam from a portion of said coherent light; means for receiving a signal return beam; means for tilting said wedge along at least one horizontal axis therethrough for aligning said reference beam and said signal return beam upon said active detector means; and passive detecting means, at least a portion of said signal return beam being coupled to said passive detecting means.