Re: Cooled CCD cameras - Recommendations?


<hbarwood@xxxxxxxx> wrote in message
news:1133196075.669877.212580@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi Gary,
>
> I was looking for something in the range of 3+ megapixels. I use
> various webcams and a Nikon CP990 for photography, but all suffer from
> thermal noise on long exposures.
>
> What I'm doing is cathodoluminescence microscopy. With film, CL work
> amounts to long exposures (minutes, sometimes). For digital work, I
> take a series of exposures and sum them together. Unfortunately, noise
> builds up using this method and really detracts from the images, both
> aesthetically and scientifically.
>
> I've modified an old 3Com webcam to work in the NIR and take
> simultaneous images of the infrared luminescence of my samples. The
> webcam has about 3 lux sensitivity, but is limited to 1/4 second
> maximum exposure times. I would like to work with a higher sensitivity
> and higher resolution camera than my webcam.
>
> Perhaps this clarifies my question a bit. Thanks for helping out.
>
> Henry
>

Henry, Take a look at the QImaging site(www.qimaging.com). They offer at
least one IR camera. So does Diagnostics (www.diaginc.com). Gary's stuff
is usually very good. When you talk to your local rep please be specific
about the application. I can remember selling a person an image analyser in
about 30 min. Then 2 weeks later I went up to Athens, GA to show him how it
worked. It didn't work at all for him. He really needed to tell me what he
wanted but that never happened.

Thanks,

Kevin Cunningham
SMS


.

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