Posted by
Craig Brideau on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Protective-window-for-a-confocal-microscope-tp7591445p7591488.html
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On Mon, Nov 9, 2020 at 8:29 AM Tomek Węgierski <
[hidden email]>
wrote:
> 4.) I noticed a slight increase in lateral shift between the green and far
> red channels: from ca. 30 nm to ca. 50 nm. This is a bit surprising to me,
> as there should be no bending of rays, and besides the Abbe number is not
> so bad (67.7). I did not check green vs red channel, because I do not have
> a proper prep at the moment.
>
I would expect any tilted optic in the light path to cause some lateral
chromatic aberration, even for low dispersion glass. The only way to
completely eliminate this would be to have an identical optic in the same
path tilted the opposite way. Still, 30-50nm is a rather minimal shift and
many microscopists could live with that for the sake of protecting the
internals of the microscope.
Craig