Showing papers by "James M. Florence published in 1988"
TL;DR: These results demonstrate the basic capabilities of the DMD in an image correlator system which, in combination with the potential 8-kHz frame rate for 128 x 128 DMDs, can constitute a very high speed pattern recognition system.
Abstract: Attention is given to experimental results for a binary phase-only filter implementation's correlation operations, using the deformable mirror device (DMD) spatial light modulator as the Fourier plane filter. These results demonstrate the basic capabilities of the DMD in an image correlator system which, in combination with the potential 8-kHz frame rate for 128 x 128 DMDs, can constitute a very high speed pattern recognition system. The DMD has the further capability of operating in the analog mode.
33 citations
22 Aug 1988
TL;DR: In this article, the optical characteristics of a deformable mirror device (DMD) as a Fourier plane phase modulating filter are analyzed and experimental results indicating the existence of a quasi-phase-only operational mode are presented.
Abstract: The operation of a deformable mirror device (DMD) as a Fourier plane phase modulating filter is described. An analysis of the optical characteristics of the DMD elements as phase modulators is summarized. Analytical and experimental results indicating the existence of a quasi-phase-only operational mode are presented. These results are used to specify the mirror deflection required to implement a binary phase-only image correlation operation. An optical correlator system is implemented using the DMD Fourier plane filter and experimental results from this system are compared with computer simulations of the correlator operation.
14 citations
22 Aug 1988
TL;DR: The results of a computer model of the far field diffraction pattern of the Texas Instruments cantilever beam inverted cloverleaf deformable mirror device (DMD) are presented in this paper.
Abstract: The results of a computer model of the far field diffraction pattern of the Texas Instruments cantilever beam inverted cloverleaf deformable mirror device (DMD) are presented. Both amplitude and phase in the Fourier transform plane are studied using a variety of input DMD phase objects. Changes in the Fourier plane phase and amplitude produced by changes at the input (including random leaflet-to-leaflet input phase errors) are investigated. The phase in the Fourier plane was found to be very sensitive to even slight variations in the deflections of the individual mirror leaflets. This could limit its usefulness as an input device.
3 citations