http://confocal-microscopy-list.275.s1.nabble.com/inverting-photo-detector-polarity-on-a-microscope-tp7588654p7588660.html
Thanks Craig. It looks like I could modify the THS3120EVM to operate at a
gain of -1 by swapping out some resistors. The opamp itself is unity gain
> *****
> 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.
> *****
>
> You'd still need to apply a 2V offset then come down from that. By the time
> you splice in the bias offset you might as well have patched in an
> inverter.
> Craig
>
> On Wed, Sep 5, 2018 at 11:42 PM Mark Cannell <
[hidden email]>
> wrote:
>
> > *****
> > 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.
> > *****
> >
> > You could just record the data as is and invert the image afterwards?
> >
> > Mark B. Cannell. Ph.D. FRSNZ FISHR
> > Department of Physiology, Pharmacology & Neuroscience
> > School of Medical Sciences
> > University Walk
> > Bristol BS8 1TD
> >
> >
[hidden email]
> >
> >
> >
> > On 6/09/18, 2:23 AM, "Confocal Microscopy List on behalf of Edward
> > Allgeyer" <
[hidden email] on behalf of
[hidden email]
> >
> > wrote:
> >
> > *****
> > 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.
> > *****
> >
> > Hi Mike,
> >
> > I have no commercial interest in either of the things I'm going to
> > mention
> > but they maybe of interest to you.
> >
> > First, there is a California based company, Pulse Research Lab, that
> > sells
> > a selection of high speed off the shelf comparators/sine wave
> > converters
> > that I've had success with for similar purposes. Their comparators
> are
> > fairly forgiving with what you connect as the input and you have a
> > number
> > of options for the corresponding output. You can browse their
> selection
> > here:
> >
> >
> >
>
https://www.pulseresearchlab.com/collections/comparators-sinewave-converters-1> >
> > I'll also mention that on their comparators they have preset
> > thresholds but
> > you can also set an arbitrary threshold by applying a DC voltage to
> the
> > complementary input if you want to.
> >
> > Second, Picoquant also sells a few inverters and adaptors that might
> > work
> > for you. Specifically the SI100 is a passive inline pulse inverter
> and
> > might work for your application. You can browse their adapters,
> > splitters
> > and cables here:
> >
> >
> >
>
https://www.picoquant.com/products/category/accessories/adapters-splitters-cables-various-accessories-for-photon-counting-setups> >
> > Hopefully this helps. Again, no commercial interest in either of
> these
> > companies. Just thought I'd mention them as possible options.
> >
> > Best,
> > Ed
> >
> > On Wed, Sep 5, 2018 at 12:58 PM Michael Giacomelli <
[hidden email]>
> > wrote:
> >
> > > *****
> > > 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.
> > > *****
> > >
> > > Hi,
> > >
> > > I would like to test out a new detector module in a commerical
> > Olympus
> > > confocal body. Unfortunately, the detector uses an inverting
> > amplifier
> > > (0->-1 V), while the Olympus assumes a non-inverting transimpedance
> > > amplifier (0->+1 V). I've spoken with them and there is no way to
> > change
> > > the A/D configuration on this specific model, and so I cannot use
> the
> > > detector as is.
> > >
> > > Is there a commerical solution available for adapting something
> like
> > this?
> > > I would like to avoid having to design and breadboard an inverting
> > buffer
> > > amplifier if I can avoid it.
> > >
> > > Thanks,
> > > Mike
> > >
> >
> >
> >
>