i*o
发帖数: 202 | 1 刚才好像出问题了，再发一次。
SIM是用一个 one-dimensional grid pattern作为illumination的trick来achieve
optical sectioning的。因为zero-order (in- and out-of-focus light) won't
attenuate with defocus, but nonzero-orders do, 所以去掉DC项和AC项中的
modulation (communication 中的square-law detection)就得到optically sectioned
images.
我不明白的是为什么 zero-order doesn't attenuate with defocus 呢？又或者为什
么其他项就会随着defocus而越来越弱？
谢谢！ | C**R
发帖数: 1047 | 2 think about it. what is zero-order?
It is the sum of your illumination.(set kx,ky=0, you get a simple
integration)
So, no matter how u change the defocus, the sum of your illumination does
not change.
sectioned
【在 i*o 的大作中提到】
: 刚才好像出问题了，再发一次。
: SIM是用一个 one-dimensional grid pattern作为illumination的trick来achieve
: optical sectioning的。因为zero-order (in- and out-of-focus light) won't
: attenuate with defocus, but nonzero-orders do, 所以去掉DC项和AC项中的
: modulation (communication 中的square-law detection)就得到optically sectioned
: images.
: 我不明白的是为什么 zero-order doesn't attenuate with defocus 呢？又或者为什
: 么其他项就会随着defocus而越来越弱？
: 谢谢！
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