Browsing by Author "Scott, BF"

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Electronic compensation for nonideal spatial light modulator characteristics
(2000-10-01)
Budgett, DM
;
Sharp, JH
;
Tang, PC
;
Young, RCD
;
Scott, BF
Compensation for spatial light modulator device imperfections can be achieved using digital electronics. Optical computing applications, requiring accurate phase or amplitude modulation, can then make use of low-cost, enhanced devices. Using electronic compensation, corrections can be made for a nonsquare aspect ratio in the aperture window and a nonlinear phase response-which may also be nonuniform over the aperture. The corrections for these imperfections are implemented using low-cost field programmable gate arrays. This technology enables real-time compensation and is easily adapted to suit a wide range of display devices. The performance enhancement is demonstrated using a popular Seiko-Epson liquid crystal television display operating as a phase modulating spatial light modulator. These developments greatly extend the utility of readily available, inexpensive, spatial light modulators. (C) 2000 Society of Photo-Optical instrumentation Engineers. [S0091-3286(00)02509-5].
Parallel pixel processing using programmable gate arrays
(1996-08-15)
Budgett, DM
;
Tang, PE
;
Sharp, JH
;
Chatwin, CR
;
Young, RCD
A reconfigurable hardware design permits very fast feature extraction from high frame rate video images. By implementing parallel pixel processing paths in programmable gate arrays, a wide range of image processing algorithms can be implemented in realtime.