光学
对数
衍射
点扩散函数
镜头(地质)
图像处理
数字图像处理
像素
数字成像
景深
物理
计算机科学
数字图像
计算机视觉
数学
图像(数学)
数学分析
作者
Wanli Chi,Nicholas George
出处
期刊:Optics Letters
[The Optical Society]
日期:2001-06-15
卷期号:26 (12): 875-875
被引量:161
摘要
Transmission functions are derived that are valid in the nonparaxial case for a class of lenses that will image a continuum of points along an optical axis to a single image point. This lens, which we call a logarithmic asphere, is then used in a digital camera. The resolution of the camera is limited by the pixel size of the CCD; i.e., it is not diffraction limited. Digital processing is used to recover the image, and image-plane processing is used for speed. We find a tenfold increase in the depth of field over that for the diffraction-limited case.
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