http://confocal-microscopy-list.275.s1.nabble.com/Safe-to-run-multiphoton-laser-at-100-power-for-overnight-continuous-imaging-tp7588726p7588748.html
thermopile, so it might work for you. It's about the size of a Thorlabs
cage plate so it is possible to cram it onto a microscope stage. Since it
It has a 10mm detector, so it's not too difficult to achieve this. Note the
> *****
> To join, leave or search the confocal microscopy listserv, go to:
>
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> Post images on
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>
> Hi Craig,
>
> that is the exact model of power meter I destroyed trying to measure 2P
> laser power. I was new to the job and had no idea the power meter had
> limits. I measured visible lasers and got expected results. Measured 2P
> laser and each time I repeated the measure the value decreased, a lot!
> Asked thorlabs, and they explained I’d somewhat exceeded the power
> capacity as peak power was 100s of kW and average power >2W. Considerably
> more than the 150 mW limit. I asked if the 175C thermal meter (2W max)
> would be ok but Thorlabs didn’t recommend it.
> I no longer measure the 2P laser power directly, but do periodic
> comparisons of chroma slide brightness to check powers are as expected.
>
> Any recommendations for an economical 2P suitable meter?
>
> Cheers
>
> Dale
>
> Dale Moulding PhD FRMS
> ICH Light Microscopy Facility
> UCL Great Ormond Street lnstitute of Child Health
> 30 Guilford Street
> London WC1N 1EH
> Mob: 07787 699 609
> Tel: 020 7905 2753
> Please acknowledge use of the BRC funded facility in all publications:
>
>
http://www.ucl.ac.uk/ich/core-scientific-facilities-centres/confocal-microscopy>
> ________________________________
> From: Confocal Microscopy List <
[hidden email]> on
> behalf of Craig Brideau <
[hidden email]>
> Sent: 26 September 2018 18:18:04
> To:
[hidden email]
> Subject: Re: Safe to run multiphoton laser at 100% power for overnight
> continuous imaging?
>
> *****
> To join, leave or search the confocal microscopy listserv, go to:
>
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy> Post images on
http://www.imgur.com and include the link in your posting.
> *****
>
> 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> >
>