Inexpensive Liquid Crystal Televisions Research Articles

Infrared signal processing using a liquid crystal television

The ability of an inexpensive liquid crystal television to modulate both coherent and incoherent infrared light is reported. Experiments demonstrating light modulation for wavelengths between 0.8 μm and 1.1 μm have been performed. Potential applications to dynamic lR scene simulators, compact joint transform correlators, and novel electron trapping processors are described.

Liquid crystal TV-based white light optical tracking novelty filter

A compact white light optical tracking novelty filter is demonstrated. Based on the use of two inexpensive liquid crystal televisions, a filtered and collimated white light source, digital delay, and video recorder, this portable white light device performs two major image comparison operations, a real time image subtraction and novelty tracking operations. Some preliminary experimental results are presented.

Optical liquid-crystal-television correlator for particle-image-velocimetry processing

An application of an inexpensive liquid-crystal television as a processor for full-field velocity measurement techniques that require two-dimensional correlation is presented. With the use of nonspecialized optics, the results compare well with digital correlations.

Free-space folded-path optical programmable logic array

A new method to realize a medium-scale, free-space optical programmable logic array is proposed. By using either a two-dimensional optical spatial light modulator or an array of one-dimensional spatial light modulators inside a lens-based multiple-beam-path cavity, an array of optical multiple-variable logic product terms is generated. This device, together with a programmable multiple-variable OR matrix, can be used to implement any Boolean combinatorial logic operations. For an optical binary combinatorial logic computation, the proposed method efficiently uses three-dimensional space and optical elements. Preliminary experimental results obtained using an inexpensive liquid-crystal television are included.

Optical parallel logic gates using inexpensive liquid-crystal televisions

The optical implementation of parallel logic gates using inexpensive liquid-crystal televisions (LCTV's) is demonstrated, and basic experimental results are presented. While it is certainly unreasonable to expect general-purpose optical computers to be built from LCTV's, demonstration-level systems can be built, from which a great deal may be learned.