什么是非球面镜片?

非球面透镜是一种表面轮廓不是球体或圆柱体部分的透镜. 在摄影中, 包含非球面元件的透镜组件通常称为非球面透镜.
The asphere’s more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A single aspheric lens can often replace a much more complex multi-lens system. The resulting device is smaller and lighter, and sometimes cheaper than the multi-lens design.Aspheric elements are used in the design of multi-element wide-angle and fast normal lenses to reduce aberrations.
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