Shrauger V E, Erwin L L, Ahn J L, Warde C
Appl Opt. 1994 Aug 10;33(23):5318-27. doi: 10.1364/AO.33.005318.
High-efficiency phase-only computer-generated holograms (CGH's) were produced expediently and inexpensively by a color-encoded discrete-phase-level process. Computer-generated-hologram gray levels were mapped to color with a high-resolution color printer, and color was mapped to phase by a broad-spectral-sensitivity high-resolution black-and-white film. Experimental results illustrating colorto optical-density and color-to-phase mapping are presented for Kodak 649F film. A variety of optical interconnection elements exhibiting high diffraction efficiencies and high contrast ratios for both on- and off-axis performance were fabricated by this technique. Typical experimental results are presented.
通过一种颜色编码的离散相位级过程，高效地且低成本地生成了仅相位型计算机生成全息图（CGH）。利用高分辨率彩色打印机将计算机生成全息图的灰度级映射为颜色，并通过具有宽光谱灵敏度的高分辨率黑白胶片将颜色映射为相位。给出了针对柯达649F胶片的说明颜色到光密度以及颜色到相位映射的实验结果。通过该技术制造了各种在轴上和离轴性能方面均表现出高衍射效率和高对比度的光学互连元件。展示了典型的实验结果。
