Many companies sell infrared thermal cameras. Amazon, Optics Planet, Grainger, Testers and Tools, and Omega Engineering are just a few online sources for thermal cameras.
I don't think it's an actual thermal camera at all. In other words, I don't think it really detects infrared light. I think it just detects total visible light intensity, and displays that intensity the way an infrared camera would - with maximum intensity displayed as bright red, and minimum intensity displayed as deep blue. You can tell this is the case by taking it into a dark closet. It doesn't detect anything, including your own hands or face, because there's no visible light present. A real infrared camera would "see" your hand or your face in a dark closet. The Photobooth "thermal camera" does not, because it isn't really a thermal camera. Which is unsurprising. CCD's with real infrared detection are kind of expensive.
A thermal image camera renders infrared radiation as visible light and allows the user to see where more heat is present in a given object. A thermal image camera can be bought online at sites such as Amazon or Newegg.
The prices have been known to be up to $8,000! The minimum is usually around $1,114.000 (at least what i have seen). If you find one under that limit its a bargain. Hope you find yourself a good one :)
An infared one?
To see an infrared light beam, one can use an infrared camera or infrared goggles that can detect and display the infrared light as visible light. These devices convert the infrared light into a visible image that can be seen by the human eye.
Infrared cameras are used to shoot outside at night, or indoors where the lighting may be insufficient to film or shoot properly. They're also used in battle.
Thermal infrared cameras are used for many things. Examples of this are with firefighters. Firefighters use these cameras to see through smoke and possibly through walls. Also, police officers may use these cameras to seek out running criminals in the dark. People interested in the supernatural may additionally use thermal infrared cameras as it can help to see paranormal apparitions.
Thermal imaging cameras are generally expensive. New ones typically cost at least $1000. However, you can get it lower if you buy a used one from Ebay or Amazon marketplace.
There are a number of online sites which contain directions on how to turn a webcam into an infrared camera. The web domain "wikiHow," for example, contains this information.
You can buy these particular cameras on several websites, including Ebay. If you don't wish to make your purchase online, then you can go to Comcast and they can help you get one of these and even install it for you.
If there is one thing you should know, it's infrared waves. Obvi.
One could buy electric infrared heaters from shops like Saunacore. This shop specializes in sauna heater, steam bath, electric infrared heaters, etc.