Amitai Y, Reinhorn S, Friesem A A
Appl Opt. 1995 Mar 10;34(8):1352-6. doi: 10.1364/AO.34.001352.
A method for designing and recording visor displays based on planar holographic optics is presented. This method can deal with the problem of recording-readout wavelength shift. The display system is composed of two holographic optical elements that are recorded on the same substrate. One element collimates the waves from each data point in the display into a plane wave that is trapped inside the substrate by total internal reflection. The other diffracts the plane waves into the eye of an observer. Because the chromatic dispersion of the first element can be corrected by the dispersion of the second, this configuration is relatively insensitive to source wavelength shifts. The method is illustrated by the design, recording, and testing of a compact holographic doublet visor display. The recording was at a wavelength of 458 nm, and readout was at 633 nm. The results indicate that diffraction-limited performance and relatively low chromatic dispersion over a wide field of view can be obtained.
提出了一种基于平面全息光学设计和记录遮阳板显示器的方法。该方法可以解决记录-读出波长偏移的问题。显示系统由记录在同一基板上的两个全息光学元件组成。一个元件将显示器中每个数据点的波准直成平面波，该平面波通过全内反射被困在基板内。另一个元件将平面波衍射到观察者的眼睛中。由于第一个元件的色散可以由第二个元件的色散校正，这种配置对光源波长偏移相对不敏感。通过设计、记录和测试一个紧凑型全息双合透镜遮阳板显示器来说明该方法。记录波长为458nm，读出波长为633nm。结果表明，在宽视场范围内可以获得衍射极限性能和相对较低的色散。
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