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阐述了利用细菌视紫红质薄膜 (BR薄膜 )优良的非线性光学特性作为光寻址的空间光调制器的实验研究 .BR有两个重要的光敏中间态 (B态和M态 ) ,其吸收带 (B态吸收峰为 5 70nm ,M态吸收峰为 4 12nm)重叠区域较少 ,利用其正向 (B→M)和逆向 (M→B)光反应之间转化关系和B态与M态的差异吸收实现了相干光学图像到非相干光学图像的转换实验 .采用经基因改性的细菌视紫红质薄膜 (BRD96N)材料 ,使用 6 70nm相干光作为写入光 ,5 30nm非相干光作为读出光 ,得到了分辨率约为 2 0 0lines mm ,对比度约为 2 .1∶1的实验结果 .
An experimental study of the excellent optical nonlinearity of bacteriorhodopsin film (BR film) as a spatial light modulator for optical addressing is described.BR has two important photo-sensitive intermediate states (B and M) which absorb (B → M) and reverse (M → B) photoreactions, and the relationship between the B and M State differential absorption to achieve the conversion from coherent optical image to incoherent optical image.Using genetically modified bacterial rhodopsin film (BRD96N) material, the use of 6 70nm coherent light as the writing light, 5 30nm incoherent light as Reading out the light, the resolution of about 200 lines mm, the contrast of about 2 .1: 1 experimental results.