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The grating light valve (GLV) is a "micro projection" technology which operates using a dynamically adjustable diffraction grating. It competes with other light valve technologies such as Digital Light Processing (DLP) and liquid crystal on silicon (LCoS) for implementation in video projector devices such as rear-projection televisions. The use of microelectromechanical systems (MEMS) in optical applications, which is known as optical MEMS or micro-opto-electro-mechanical structures (MOEMS), has enabled the possibility to combine the mechanical, electrical and optical components in very small scale. Silicon Light Machines (SLM), in Sunnyvale CA, markets and licenses GLV technology with the capitalised trademarks Grated Light Valve and GLV, previously Grating Light Valve. The valve diffracts laser light using an array of tiny movable ribbons mounted on a silicon base. The GLV uses six ribbons as the diffraction gratings for each pixel. The alignment of the gratings is altered by electronic signals, and this displacement controls the intensity of the diffracted light in a very smooth gradation. ==Brief history== The light valve was originally developed at Stanford University, in California, by electrical engineering professor David M. Bloom, along with William C. Banyai, Raj Apte, Francisco Sandejas, and Olav Solgaard. In 1994, the start-up company Silicon Light Machines was founded by Bloom to develop and commercialize the technology. The company is now wholly owned by Dainippon Screen Manufacturing Co., Ltd.〔(Dainippon Screen Mfg. Co., Ltd. )〕 In July 2000, Sony announced the signing of a technology licensing agreement with SLM〔( Sony Develops a Grating Light Valve display device that gives high resolution, excellent contrast ratio and wide color reproduction )〕〔(Sony Signs Technology License Agreement with SLM )〕 for the implementation of GLV technology in laser projectors for large venues, but by 2004 Sony announced the SRX-R110 front projector using its own LCoS-based technology SXRD. SLM then partnered with Evans & Sutherland (E&S). Using GLV technology, E&S developed the E&S Laser Projector, designed for use in domes and planetariums.〔(Digistar 3 Laser )〕 The E&S Laser Projector was incorporated into the Digistar 3 dome projection system. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Grating light valve」の詳細全文を読む スポンサード リンク
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