| CPC G01S 7/4914 (2013.01) [H01S 3/0007 (2013.01); H04N 23/56 (2023.01); H10F 39/18 (2025.01); H10F 39/806 (2025.01); H10F 39/813 (2025.01); G01S 13/867 (2013.01)] | 19 Claims |
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1. A coherent imaging system, comprising:
a transmitter comprising:
a coherent source of electromagnetic radiation;
a power splitter for splitting the electromagnetic radiation into a reference and a signal beam transmitted to a target; and
a receiver positioned to receive the signal beam reflected from, or transmitted through, the target, the receiver comprising:
an image forming device; and
an array of pixels, each of the pixels comprising:
a capture area for collecting a portion of the signal beam imaged on the capture area by the image forming device, as a collected signal;
a plurality of waveguides distributing the reference and the collected signal, along a plurality of paths, to a plurality of couplers, wherein:
the collected signals in different paths have different phase shifts; and
each of the couplers mix the reference with a different one of the collected signals having a different one of the phase shifts so as to form a plurality of mixed signals; and
a plurality of detectors coupled to outputs of the couplers so as to detect each of the mixed signals and output a plurality of output signals in response thereto.
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