Booth B L
Appl Opt. 1975 Mar 1;14(3):593-601. doi: 10.1364/AO.14.000593.
An experimental Du Pont holographic photopolymer material produces an index modulation in excess of 10(-2) utilizing a diffusion mechanism. Optimum exposure in air is typically 30 mJ/cm(2) , in nitrogen 3 mJ/cm(2). Composition, beam ratio, and exposure power all affect the index modulation. This, combined with thickness variations, permits diffraction efficiency to be preadjusted for a variety of desired angular responses and spatial frequencies. The material can be easily overmodulated according to Kogelnik's phase grating theory. No wet processing is required. After total polymerization, storage at 100 degrees C, -60 degrees C, and under water does not significantly affect the diffraction efficiency. Image-object superposition is exact for real-time holography. Excellent copies of silver halide holograms with four times the original efficiency have been made. Grating devices with tailored peak or flat wavelength response can be constructed.
一种实验性的杜邦全息光聚合物材料利用扩散机制产生超过10（-2）的折射率调制。在空气中的最佳曝光量通常为30 mJ/cm（2），在氮气中为3 mJ/cm（2）。成分、光束比和曝光功率都会影响折射率调制。这与厚度变化相结合，使得可以针对各种所需的角度响应和空间频率预先调整衍射效率。根据科格尔尼克的相位光栅理论，该材料很容易被过度调制。无需湿法处理。完全聚合后，在100摄氏度、-60摄氏度和水下储存不会显著影响衍射效率。对于实时全息术，图像与物体的叠加是精确的。已经制作出了效率是原始卤化银全息图四倍的优秀复制品。可以构建具有定制峰值或平坦波长响应的光栅器件。
