Title

Experimental Demonstration of a Stripmap Holographic Aperture Ladar System

Document Type

Article

Publication Date

2010

Publication Source

Applied Optics

Abstract

By synthesizing large effective apertures through the translation of a smaller imaging sensor and the subsequent proper phasing and correlation of detected signals in postprocessing, holographic aperture ladar (HAL) systems seek to increase the resolution of remotely imaged targets. The stripmap HAL process was demonstrated in the laboratory, for the first time to our knowledge. Our results show that the stripmap HAL transformation can precisely account for off-axis transmitter induced phase migrations. This in turn allows multiple pupil plane field segments, sequentially collected across a synthetic aperture, to be coherently mosaiced together. As a direct consequence, we have been able to confirm the capability of the HAL method to potentially provide substantial increases in longitudinal cross-range resolution. The measurement and sampling of complex pupil plane field segments, as well as target related issues arising from short laboratory ranges, have also been addressed.

Inclusive pages

2262-2270

ISBN/ISSN

1559-128X

Publisher

Optical Society of America

Volume

49

Issue

12

Peer Reviewed

yes