Zero-order computer generated phase-only holograms
    83.
    发明授权
    Zero-order computer generated phase-only holograms 失效
    零阶计算机产生相位全息图

    公开(公告)号:US6166833A

    公开(公告)日:2000-12-26

    申请号:US536601

    申请日:2000-03-28

    摘要: A method for encoding zero-order phase-only holograms, and the holograms so encoded. The amplitude and phase of each point of a discrete mathematical transform, such as a Fourier transform, of an image to be encoded, are encoded as regions of a corresponding pixel of a transparent filter, with suitably selected fractional areas and optical path lengths. The various optical path lengths may be created by manipulating the filter's index of refraction, or by manipulating the thickness of the filter, preferably by etching. Various encoding schemes are presented, appropriate to etching systems with low lateral resolution, to etching systems with high lateral resolution but depth resolution limited to a discrete number of depths, and to etching systems with limited resolution both laterally and in depth.

    摘要翻译: 一种用于编码零阶相位全息图和如此编码的全息图的方法。 要编码的图像的离散数学变换(例如傅立叶变换)的每个点的幅度和相位被编码为具有适当选择的分数区域和光路长度的透明滤波器的相应像素的区域。 各种光程长度可以通过操纵滤光片的折射率,或者优选通过蚀刻来操纵滤光片的厚度来产生。 呈现适合于具有低横向分辨率的蚀刻系统的各种编码方案,具有高横向分辨率但深度分辨率限制在离散数量的深度的蚀刻系统,以及横向和深度方面的分辨率有限的蚀刻系统。