TA的每日心情 | 无聊
2022-10-10 21:59 |
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本帖最后由 zzz在路上 于 2021-10-13 11:06 编辑
1.strehl斯涅尔比值，各个软件都能给出这个指标：
The Strehl ratio is one commonly used measure of optical image quality for very high quality imaging systems. The Strehl ratio is defined as the peak intensity of the diffraction point spread function (PSF) divided by the peak intensity of the diffraction point spread function (PSF) in the absence of aberrations. OpticStudio computes the Strehl ratio by computing the PSF with and without considering aberrations, and taking the ratio of the peak intensity. The Strehl ratio is not useful when the aberrations are large enough to make the peak of the PSF ambiguous, or for Strehl ratios smaller than about 0.1.看定义应该是实际系统和理想系统点扩散函数峰值的比值；
2.Telecentricity [% of NA] 1
1%*NA，无论是NA还是换算成角度差异不大，因为小角度sin(θ)和θ近似。
比如0.09的NA，直接按NA值计算是0.09/100=0.0009弧度=0.516°；
如果按角度算，asin(0.09)=5.16°，θ/100就是 0.516°。
3.要求带1/4玻片设计，估计有两种可选方案，另外一种可选方案不知道有没有限定，比如可以放入等效厚度的普通玻璃。
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发表于 2021-10-13 10:37
发表于 2021-10-13 15:00
