Test of DTR's "LFL" Aspheric Lens.

[danielbriggs]

Doc, http://www.keller-msr.com/temperatur...easurement.php

Wayne, all the test equipment I've mentioned in the past on PL has been mine, but I don't personally own any IR cameras. I do however have access to the FLIR T400 (http://www.flir.com/cs/emea/en/view/?id=55887) and SC7000 http://www.flir.com/cs/emea/en/view/?id=42576 (resolution down to 4mK!) It has a little stirling engine inside which ticks away to cool the sensor to silly chilly brrrr.
The cup of tea shot was taken with the T400 while I was setting it up.

[The_Doctor]

Doc, http://www.keller-msr.com/temperatur...easurement.php

Oh, right, I see, so presumably some devices will let you select some coefficient for material the way a Lasercheck lets us select a wavelength, to get the right reading? Dnar, I like Fluke metres, so this is where I'll start looking. Hopefully not expensive. I'll probably end up cobbling together a manual probe with one of the few PT100's I intend to buy though. Embedded in a suitably shaped probe tip formed from silicone rubber, on a stainless steel tube (stainless steel is a damn good insulator, as metals go), might work for me. So long as the tip can be pressed flat to gather heat a lot faster than it can then go up the probe, it might even be accurate and fast...

Edit:
I think I will do what I just said... Thinking about clear anodised or raw Al, raw polished Al makes a damn good mirror (Scientific American had an article dating back maybe to late 60's where a hollow Al tube was made elliptical in cross section, forming a reflector for ruby rod and flashlamp). So it stands to reason that the moment I use Al in some capacity, I need extremely sensitive non-contact means, so expensive. So I guess what I really need is a fast, small sensitive contact. PT100 totally fits the bill.