Two-dimensional synthetic aperture laser optical feedback imaging using galvanometric scanning.
We have improved the resolution of our laser optical feedback imaging (LOFI) setup by using a synthetic aperture (SA) process. We report a two-dimensional (2D) SA LOFI experiment where the unprocessed image (i.e., the classical LOFI image) is obtained point by point, line after line using full 2D galvanometric scanning. The 2D superresolved image is then obtained by successively computing two angular SA operations while a one-dimensional angular synthesis is preceded by a frequency synthesis to obtain a 2D superresolved image conventionally in the synthetic aperture radar (SAR) method and their corresponding laser method called synthetic aperture ladar. The numerical and experimental results are compared.
Witomski
Arnaud
A
Laboratoire de Spectrométrie Physique, Université Joseph Fourier de Grenoble, UMR CNRS 5588, B.P. 87, 38402 Saint Martin d'Hères, France.
Lacot
Eric
E
Hugon
Olivier
O
Jacquin
Olivier
O