Posted by
Romain Laine on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Splitter-for-switching-between-two-cameras-on-one-c-mount-tp7586956p7586972.html
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Hi Kyle,
No there isn't really. As you mentioned, having access to the two separate
pupil is a good reason to split them right before the Fourier plane.
As long as the optical component is not anywhere near an image plane (so
typically somewhere in the infinity space) it should be fine.
It could be advantageous to use the FP if it is difficult to manufacture
the optics to insert with large size since the Fourier plane will be where
the beam is smallest (although with very small difference due to the
typically small NAs in the detection side). That's probably not the case
here.
Cheers,
Romain
--
Dr. Romain Laine, PhD in Biophotonics
Laser Analytics Group
Department of Chemical Engineering and Biotechnology
University of Cambridge
West Cambridge Site
Philippa Fawcett Drive
Cambridge
CB3 0AS
--
Dr. Romain Laine, PhD in Biophotonics
Laser Analytics Group
Department of Chemical Engineering and Biotechnology
University of Cambridge
West Cambridge Site
Philippa Fawcett Drive
Cambridge
CB3 0AS
On Fri, Jul 7, 2017 at 9:32 AM, Kyle Douglass <
[hidden email]> wrote:
> *****
> To join, leave or search the confocal microscopy listserv, go to:
>
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> *****
>
> Hi Romain,
>
>
> > We built an image splitter out of Thorlabs parts for polarization
> imaging a
> > few years ago. You can design it to split at the Fourier plane with a 4f
> > system quite easily. We built it out of cage system and lens tubes and it
> > worked well.
>
> Slightly off-topic from the original question, but related: is there a
> reason why you split the channels at the Fourier plane of your 4f system? I
> can imagine that there may be advantages to placing the dichroic elsewhere
> in the infinity space, such as immediately before the Fourier plane. This
> should essentially give you two independent copies of the pupil (one for
> each camera).
>
> I am just curious whether there is an optimum position of the dichroic for
> minimizing the aberrations imparted on the split images.
>
> Cheers,
> Kyle
>
> --
> Kyle M. Douglass, PhD
> Post-doctoral researcher
> The Laboratory of Experimental Biophysics
> EPFL, Lausanne, Switzerland
>
http://kmdouglass.github.io>
http://leb.epfl.ch>