(2)变焦的进展在高科技时代,相对比较慢, 主要原因是对色散和场曲(field of curvature)的控制很难,这是ED片和非球面镜在变焦镜头里面起到巨大作用的根本物理原因。
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meridianal curvature of field 子午场曲
Petzval curvature of field 珀兹伐场曲
anisotropic curvature of field 各向异性场曲率
agittal curvature of field 弧矢场曲
There’s gravity in higher dimensions, gravity with extra curvature terms, and gravity coupled to a ‘chameleon field’ that makes the strength of gravity different near matter than in a vacuum.
我们经常提到的是一个更广意义上的万有引力,一个与附加曲率项(extra curvature terms)有关的和与“chameleon field”(它能使物体间的万有引力在真空中和一般条件下的力度大小不同)相结合的万有引力。
On the basis of studying the current linear and nonlinear filters for identifying potential field structure, an adaptive curvature sorting filter is designed.
在考察划分位场结构线性和非线性滤波器的基础上,设计出一种自适应曲率结构分选滤波器。
A restoration scheme is proposed for space-variant image degradation resulting from curvature of field in imaging systems.
提出了一种用于像场弯曲图像的复原方法,分析了该方法的原理。
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