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A friend was talking with me recently about gravestone photos and how to get a good image. He suggested that I could use some of the technology he had used working for a security firm. He specifically mentioned a pair of "Infared goggles" which, after hearing his explanation, I understand to be night vision technology. I don't believe that vight vision would be of much use since it mostly amplifies ambient light. It did get me thinking though. If one was to use true thermal imaging technology, one might be able to read some stones that are otherwise unreadable.
I don't know much about the thermal imaging technology. I understand that it measures temperature differences and displays different colors demarking the borders of each temperature zone. Someone correct me if I am wrong here.
I thought that when the sun begins heating the gravestone during the day, the inscription area would absorb heat at a different rate due to even small shadows creates by the cut in lettering. Wouldn't a thermal imaging system be able to demark these differences? This would make a way to read an otherwise unreadable or barely readable stone.
I realize that for most of us this is a purely academic question because thermal imaging technology is priced out of the reach of many of us (including myself). How sensitive would the system need to be? Would it still be portable?
perhaps in the future the technology will be reasonably available for us. Perhaps it would be feasible for a county genealogical society or some other group to rent a system and use it for an intense week long photo project.
If anyone has knowledge of thermal imaging, please help me out here. Is this at least theoretically possible?
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