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这一章用来提高拍摄眼的全息照片的兴趣。讨论了这种全息照片的各种应用,以表明它们应用的广度,其中有此讨论得相当详细。对不熟悉全息照相的读者,有一节提供全息拍摄和重现的一般介绍,一节是叙述四种基本的拍摄几何布置,一节是介绍实现放大的方法,另外一节叙述了两种专门的全息技术:全息干涉测量和摄拍等高线图。为了帮助无经验者,详细讨论了参数的选择。专门用于眼睛的全息照相时,这些参数是:波长、视网膜能量密度、曝光时间和拍摄材料。还讨论了斑点的问题,特别是有关眼的全息照相中的斑点问题,叙述和讨论了由6个研究小组拍摄的眼的全息照片。附录讨论了眼的全息照片的信息容量,以解释为什么一张眼的全息照片比一张眼底照相机拍的照片包含有多得多的信息。未来将有可能摄制活人眼睛的各个区域的单全息照片和干涉量度全息照片。评述可能有助于打算在这一领域中开展研究的读者。
This chapter is intended to enhance the interest in taking holographic photographs of the eye. Various applications of such holograms are discussed to show the breadth of their application, and the discussion is quite detailed here. For readers unfamiliar with holography, there is a section providing a general introduction to holography and reproduction. One section describes the four basic shooting geometries, one section describes the method of magnification, and the other section describes two specialized Holographic Technology: Holographic Interferometry and Snapshot Contours. To help inexperienced people, the choice of parameters is discussed in detail. When used exclusively for holographic eyes, these parameters are: wavelength, retinal energy density, exposure time, and shot material. The speckle problem was also discussed, particularly with regard to speckle in holographic eyes, and holographic photographs of the eye photographed by six study groups were described and discussed. The appendix discusses the information capacity of an eye’s hologram to explain why one eye’s hologram contains much more information than a photograph taken by a fundus camera. In the future it will be possible to produce single-holographic photographs and interferometric holograms of the various regions of the living eyes. Review readers who may be helpful in their research in this area.