Re: Safe to run multiphoton laser at 100% power for overnight continuous imaging?

Posted by Craig Brideau on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Safe-to-run-multiphoton-laser-at-100-power-for-overnight-continuous-imaging-tp7588726p7588738.html

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If you will allow me a shameless plug, I assisted Thorlabs with the design
for a power meter for this specific purpose. I worked with the prototype
and provided feedback alongside Dr. Pina Colarusso. There is an index
matching gel under the surface which deals with the high NA rays, and you
can use water or immersion oil safely on the sensor face:

https://www.thorlabs.com/thorproduct.cfm?partnumber=S170C

It is actually manufactured at one of their facilities in Germany. :)

Craig



On Wed, Sep 26, 2018 at 5:17 AM Steffen Dietzel <[hidden email]> wrote:

> But (as far as I know) the usual power meters only give an accurate
> reading with light that falls orthogonally on their surface. So with a
> high NA objective, at the sample plane the measured value would be
> substantially less than the actual power and you only get a 'minimal
> estimate'.
> Apparently it is virtually impossible to do this measurement at the
> sample plane accurately with the usual tools.
>
> Steffen
>
> --
> ------------------------------------------------------------
> Steffen Dietzel, PD Dr. rer. nat
> Ludwig-Maximilians-Universität München
> Biomedical Center (BMC)
> Head of the Core Facility Bioimaging
>
> Großhaderner Straße 9
> D-82152 Planegg-Martinsried
> Germany
>
> http://www.bioimaging.bmc.med.uni-muenchen.de
>