Three-dimensional reconstruction of a millimeter-wave scene by optical up-conversion and cross-correlation detection

An optical imaging apparatus, including:

• a plurality of optical modulators configured to receive respective image-information-bearing radio-frequency (RF) signals of a plurality of RF signals and to modulate the respective RF signals onto respective optical signals of a plurality of optical signals to obtain a plurality of modulated optical signals;
• a correlation engine configured to obtain and detect cross-correlations of the plurality of modulated optical signals;
• and
• a processing device configured to generate an image based upon the detected cross-correlations.

An imaging apparatus, including:

• means for modulating a plurality of radio-frequency (RF) signals bearing image information onto a corresponding plurality of optical signals to obtain a corresponding plurality of modulated optical signals;
• means for obtaining cross-correlations of the plurality of modulated optical signals;
• and
• means for processing the cross-correlations to generate an image.