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    • 10. 发明公开
    • Spatial light modulator using electron trapping materials
    • 使用电子捕获材料的空间光调制器
    • EP0422581A3
    • 1992-03-11
    • EP90119338.3
    • 1990-10-09
    • QUANTEX CORPORATION
    • Storti, George M.Jutamulia, SugandaWrigley, Charles Y.Podraczky, Emeric I.
    • G02F2/02
    • G02F1/17G02F2/02G11C13/04
    • A novel, high-speed spatial light modulator utilizing electron trapping materials. The electron trapping material is exposed to a pattern of modulating radiation, resulting in the excitation of electrons in the material at spatial locations corresponding to the pattern. When the light to be modulated (ordinarily coherent light) is simultaneously or subsequently passed through the material, it is absorbed in areas of the material where electrons have been excited. The unabsorbed modulated light passes through the electron trapping material, producing a negative image of the pattern of modulating radiation. The electron trapping material also emits an image of incoherent visible light as the released electrons fall back to the ground state. This visible image can be filtered out if the device is only being used for modulating coherent light. Conversely, the device can be utilized by detecting only the incoherent visible emission from the electron trapping material, which constitutes a multi­plicative product image of the electron exciting and electron releasing light incident on the electron trapping material.
    • 一种利用电子捕获材料的新型高速空间光调制器。 电子捕获材料暴露于调制辐射的模式,导致在对应于图案的空间位置处材料中的电子的激发。 当待调制的光(通常相干光)同时或随后通过材料时,其被吸收在电子被激发的材料的区域中。 未吸收的调制光通过电子捕获材料,产生调制辐射图案的负像。 随着释放的电子落回到基态,电子捕获材料还发出非相干可见光的图像。 如果设备仅用于调制相干光,则可以将该可见图像滤除。 相反,可以通过仅检测来自电子捕获材料的非相干可见光发射来利用该器件,该电子俘获材料构成入射在电子俘获材料上的电子激发和电子释放光的乘法乘积图像。