Steve,
This is Liquid Crystal Thermography. Find a detailed paper here: www.srmuniv.ac.in/sites/default/files/files/SpecialimagingTech.pdf or just Google Liquid crystal thermography, and find out more than you ever want to know.
In a previous life, my Failure Analysis lab used them to locate microscopic shorts in semiconductor devices. The ones we used had a very short temperature range under which they would show color, otherwise they were clear. We used them with a black coating between them and the device we were examining, so that we could see the colors. I think the entire range that they would show color was approximately 5\ufffdC, with different materials for different temperatures.
Harvey
\ufffdSaw some videos on what looks like an LCD type of chemical that changes
color with temperature.
Im looking to experiment with some chemicals that change color with
temperature, sort of like
a thermometer read by color instead of numbers.
Any ideas or sugguestions out there? I remember a couple of people here
seemed very good with
knowledge of chemicals. I happened to skip chemistry class in high school -
hehe.
Steve Hearns
Technotronic Dimensions, VT [USA]
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