报道了用氢化非晶硅(α-Si:H)pin二极管作光敏层，扭曲向列型液晶(TnLC)作电光调制层的光寻址空间光调制器(OASLM)的设计、制作与性能测试.结果表明制得的(OASLM)分辨率大于20Lp/MM；在300Lux白光写入时对比度高于25:1；白光写入灵敏度约3Lux。

We report the fabrication and operation of an optically addressed spatial light modulator(OASLM), consisting of a hydrogenated amorphous silicon (α-Si: H) pin photodiode as a photosensor and a twist nematic liquid crystal(TNLC) as the modulating material. The intrinsic and doped α-Si: H films are deposited continuously by pECVD method in a reaction chamber with a shutter. The optical measurement indicates that the OASLM has a resolution of at least 20 lp/mm. The contrast ratio under the 300 lux illumination of white light is higher than 25:1. The white light writing sensitivity is about 3 lux.