Journal ArticleDOI
Optical-data-processing properties of a liquid-crystal television spatial light modulator.
TLDR
It is discovered that the extremely inexpensive Radio Shack liquid-crystal television, with proper modifications, has potential for optical-data-processing applications.Abstract:
The potential of the extremely inexpensive Radio Shack liquid-crystal television (LCTV) as a two-dimensional spatial light modulator has been investigated. The LCTV modulates the transmission of coherent or incoherent light and can either be electronically addressed through a microcomputer or optically addressed with a TV camera. We have measured the transmission characteristics of the device, examined its diffraction pattern, and tested its use as an input device for an optical correlator. We have discovered that, with proper modifications, it has potential for optical-data-processing applications.read more
Citations
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Journal ArticleDOI
Encoding amplitude information onto phase-only filters
TL;DR: A new, to the knowledge, technique for encoding amplitude information onto a phase-only filter with a single liquid-crystal spatial light modulator, effectively allowing for amplitude modulation of either the first-order or the zero-order diffracted light.
Journal ArticleDOI
Two-dimensional spatial light modulators: a tutorial
J.A. Neff,R.A. Athale,S.H. Lee +2 more
TL;DR: Two-dimensional spatial light modulators (SLMs) as mentioned in this paper modulate one of the properties of an optical wavefront (amplitude, phase, polarization) as a function of two spatial dimensions and time in response to informationbearing control signals that may be either optical or electrical.
Journal ArticleDOI
Adaptive real-time pattern recognition using a liquid crystal TV based joint transform correlator
TL;DR: A new implementation of the real-time joint transform correlator architecture using inexpensive LCTVs will be discussed and preliminary experimental results are presented to verify the usefulness of the technique.
Journal ArticleDOI
Polarization eigenstates for twisted-nematic liquid-crystal displays.
TL;DR: It is shown that superior phase-only operation can be obtained over a given operating range for the LCD compared with other approaches and that the eigenvectors are elliptically polarized.
Journal ArticleDOI
Optical novelty filters
Dana Z. Anderson,Jack Feinberg +1 more
TL;DR: An analytical treatment of the two-beam coupling devices is given in a Laplace transform framework in the undepleted pump approximation assuming plane wave inputs to allow a unified treatment ofThe current status of optical novelty filters and related devices is reviewed.
References
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Journal ArticleDOI
Signal detection by complex spatial filtering
TL;DR: The experimental results obtained to date indicate that this technique provides an excellent two-dimensional filtering capability that will play a key role in such problems as shape recognition and signal detection.
Journal ArticleDOI
Optical-Image Correlation With A Binary Spatial Light-Modulator
TL;DR: In this paper, the use of a binary, magneto-optic spatial light modulator as an input device and as a spatial filter in a VanderLugt correlator is investigated.
Journal ArticleDOI
Two-Dimensional Magneto-Optic Spatial Light Modulator For Signal Processing
TL;DR: In this paper, a thin magnetic garnet film is epitaxially deposited on a transparent nonmagnetic garnet substrate, in the manner of magnetic bubble memory films, and Semiconductor photolithographic techniques are used to etch the film into a 2D array of mesas and to deposit X-Y drive lines for matrix-addressed current switching of the mesa magnetization.
Journal ArticleDOI
A new real-time non-coherent to coherent light image converter - The hybrid field effect liquid crystal light valve
Jan Grinberg,A. D. Jacobson,W. P. Bleha,Leroy J. Miller,Lewis M. Fraas,Donald D. Boswell,Gary D. Myer +6 more
TL;DR: In this paper, a CdS photoconductor, CdTe light absorbing layer, a dielectric mirror, and a liquid crystal layer sandwiched between indium-tin-oxide transparent electrodes deposited on optical quality glass flats was developed for real-time coherent optical data processing.
Journal ArticleDOI
128 × 128 deformable mirror device
TL;DR: In this article, the deformable mirror device (DMD) is an X-Y array of deformable elements addressed by an underlying array of MOS transistors, and the architecture, operation, and experimental results are presented for a 128 × 128 DMD.
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