A New Real-Time Non-Coherent to Coherent Light Image Converter The Hybrid Field Effect Liquid Crystal Light Valve

Grinberg, J.; Jacobson, A. D.; Bleha, W. P.; Miller, L. J.; Fraas, Lewis M.; Boswell, D.; Myer, Gary

doi:10.1117/12.7971871

Cited by 166 publications

(42 citation statements)

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“…The Hughes LCLV employs CdS as the photoconductor and a twisted nematic liquid crystal structure as the active modulating medium [1]. Maximum resolution was achieved when this device was driven by a 1.92 KHz, 9.96 V amplitude sinusoidal waveform while the incident read and write beam intensities corresponded to 140 giW/cm 2 each.…”

Section: Resolution Measurementsmentioning

confidence: 99%

Comparison of optically addressed spatial light modulators

1991

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Section: Resolution Measurementsmentioning

confidence: 99%

Comparison of optically addressed spatial light modulators

1991

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“…The origins of liquid crystal over silicon (LCOS) are shrouded in mystery and are difficult to trace (1)(2)(3)(4); however, ferroelectric liquid crystal (FLC)-based LCOS devices are relatively easy, with the invention being shared between the groups at Boulder Colorado (5-7), STC labs in Harlow (8) and Edinburgh University (9,10). The presentation of the first working devices by STC labs at an Optical Society (OSA) spatial light modulators (SLMs) meeting in Lake Tahoe in 1988 (11) was the beginning of this technology, with the design and fabrication of a 176×176 pixel device (9).…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric liquid crystal over silicon devices

Wilkinson

2012

Liquid Crystals Today

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Over the past 20 years, ferroelectric liquid crystal over silicon (FLCOS) devices have made a wide impact on applications as diverse as optical correlation and holographic projection. To cover the entire gamut of this technology would be difficult and long winded; hence, this paper describes the significant developments of FLCOS within the Engineering Department at the University of Cambridge.The purpose of this paper is to highlight the key issues in fabricating silicon backplane spatial light modulators (SLMs) and to indicate ways in which the technology can be fabricated using cheap, low-density production and manufacturability. Three main devices have been fabricated as part of several research programmes and are documented in this paper. The fast bitplane SLM and the reconfigurable optical switches for aerospace and telecommunications systems (ROSES) SLM will form the basis of a case study to outline the overall processes involved. There is a great deal of commonality in the fabrication processes for all three devices, which indicates their potential strength and demonstrates that these processes can be made independent of the SLMs that are being assembled. What is described is a generic process that can be applied to any silicon backplane SLM on a die-by-die basis. There are hundreds of factors that can affect the yield in a manufacturing process and the purpose of a good process design procedure is to minimise these factors. One of the most important features in designing a process is fabrication experience, as so many of the lessons in this business can only be learned this way. We are working with the advantage of knowing the mistakes already made in the flat panel display industry, but we are also faced with the fact that those mistakes took many years and many millions of dollars to make.The fabrication process developed here originates and adapts earlier processes from various groups around the world. There are also a few totally new processes that have now been adopted by others in the field. Many, such as the gluing process, are still on-going and have to be worked on more before they will fully suit 'manufacturability'.

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“…A novel liquid crystal (LC)-based radiation detector, which combines a LC light valve with a phosphor screen, has been reported earlier [3][4][5]. The light valve has a simple structure consisting of a photoconductor layer and a LC layer.…”

Section: Introductionmentioning

confidence: 99%