Phase Correction of Light Modulators,
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
Pagination or Media Count:
A new and inexpensive holographic technique for measuring the phase errors of a two-dimensional spatial light modulator SLM is described, and experimental verification is provided. A new technique to correct spatial phase errors in any SLM is then detailed and experimentally demonstrated. This technique is employed for the Radio Shack liquid-crystal television SLM, and a shift-invariant correlator is obtained. Additional low-pass filtering techniques appropriate for any SLM with a fixed pattern of modulating cells are discussed that provide improved contrast and achieve proper correlations.
- Non-Radio Communications