公开(公告)号：EP0811872A1

公开(公告)日：1997-12-10

申请号：EP97303990.2

申请日：1997-06-09

申请人： SHARP KABUSHIKI KAISHA

发明人： Robinson, Michael Geraint ,  Tombling, Craig ,  Mayhew, Nicholas ,  Kuratate, Tomoaki, 303 Famille Matsudo Grandage 11

IPC分类号： G02F1/29 ,  G02F1/141

CPC分类号： G02F1/134336 ,  G02F1/141 ,  G02F1/292 ,  G02F2201/124

摘要： A diffractive spatial light modulator comprises first and second substrates (1, 2) between which an optical path is defined comprising, in order, first (8), second (6), and third (8) half wave retarders. The second retarder (6) has a fixed optic axis whereas the first and third retarders (8) have switchable optic axes. The modulator is pixellated and each pixel comprises a switchable phase-only diffraction grating. Each pixel is switchable between a first mode in which incident light is output in the zeroth order diffraction lobe and a second mode in which incident light is deflected into higher order diffraction lobes. The spatial light modulator may be used in high brightness projection displays.

摘要翻译： 衍射空间光调制器包括第一和第二基板（1,2），其间定义光路，依次包括第一（8），第二（6）和第三（8）半波延迟器。 第二延迟器（6）具有固定的光轴，而第一和第三延迟器（8）具有可切换的光轴。 调制器是像素化的，并且每个像素包括可切换的仅相位衍射光栅。 每个像素可以在其中入射光在零阶衍射波瓣中输出的第一模式和入射光偏转到更高阶衍射波瓣的第二模式之间切换。 空间光调制器可以用在高亮度投影显示器中。