Ultra-High Resolution Digital Holographic Camera

摘要

A high resolution holographic imaging system. A laser illuminator is configured to operate in two or more wavelengths sequentially and a phase modulator element configured to operate at three or more phase positions. The illumination beam is split into two parts and propagated into optically diffractive elements to define “top hat” signals from the received Gaussian signals. One beam is directed onto a target area scene of interest and one beam is directed to an optical phase modulator element. The two beams are combined on an electronic imaging element for three phase positions of the phase modulator. The laser wavelength is shifted slightly and operation repeats. The data frames are digitized and a data processing unit implemented to calculate the complex amplitude and perform reconstruction of the image.

主权项

1. An imaging system comprising:
an illuminator source comprising an electromagnetic beam output, a beam-splitter element configured for dividing the beam into an illuminator beam and a reference beam, an illuminator diffraction lens element disposed in an illuminator beam path, an optical phase modulator disposed in a reference beam path configured to selectively modulate the phase of the reference beam, a reference diffraction lens element disposed in the reference beam path, an optical mixing element configured to mix a received illuminator beam reflection from an illuminated scene with the reference beam to define an optical input, and, a focal plane array element configured for receiving the optical input.