Fires, let me explain a bit about the different IR spectral bands. There's NIR (near infrared), SWIR (shortwave infrared), MWIR (midwave infrared), LWIR (longwave infrared), and FIR (far infrared). While SWIR (short wave infrared) sounds like it's just a synonym for NIR (near infrared), it's not. Despite its name, SWIR is actually of a longer wavelength than NIR (though there's actually some overlap between the NIR and SWIR regions). NIR is approximately 700nm to 1200nm. SWIR is approximately 900nm to 3000nm (with most SWIR cameras sensitive to the portion between 900nm and 1700nm). MWIR (midwave infrared) is then approximately, 3000nm to 7000nm (with most MWIR cameras sensitive to 3000nm to 5000nm). LWIR is 7000 to 14000nm (with most LWIR cameras sensitive between 8000nm and 14000nm). FIR is everything between LWIR and microwaves.
What I'm looking for is not a NIR camera (which I already have, by modifying a normal video camera by removing its infrared blocking filter). What I'm looking for is the much harder to find SWIR camera. Standard silicon CCD and CMOS chips have an absolute longest wavelength they are sensitive to that's about 1000nm to 1200nm (and getting within a few nm of this maximum wavelength, the sensitivity is dramatically decreases to about 1% of its maximum sensitivity, where the wavelength of its maximum sensitivity is usually around 750nm). Even if you assume a maximum wavelength of 1200nm (which is like an absolute maximum for any sensors made out of silicon, as it's simply a material property of silicon) this falls far short of 1700nm that is the upper limit of most SWIR cameras.
What is so special about these few hundred more nanometers of wavelength? Just as NIR shows you natural phenomena that can't be seen with visible light (such as green plants appearing white, because NIR is strongly reflected by chlorophyll), SWIR can show you other natural phenomena. For example, there's a very interesting phenomenon called "sky glow" or "night glow", which is best seen in the SWIR part of the spectrum (NIR is not much better than visible light, when it comes to sky glow, as sky glow is very dim in both visible and NIR light). Also, some very hot objects, that are too cool to emit visible light or even NIR, can still be hot enough to emit SWIR. For example, a hot soldering iron will be seen to glow in the SWIR part of the spectrum.
Now the problem is that these SWIR cameras cost about as much as LWIR cameras cost 10 years ago. A simple 160x120 SWIR camera will cost around $10000. This is strange, considering that SWIR cameras have far more in common with ordinary visible light CCD cameras than they do with exotic devices like LWIR cameras. SWIR cameras have charge wells, just like visible light CCD cameras, where photons striking the photosites build up electrons in the charge wells. The much more exotic technology of LWIR cameras involves a bolometer array (literally an array of microscopic electronic temperature sensors). So LWIR cameras don't use the photoelectric effect. However SWIR cameras depend on the photoelectric effect, just like visible light CCDs do. This means that the basic technology for making an SWIR camera is much more well established. Yet for some reason, the prices of SWIR cameras are insanely high. The only real difference between SWIR and visible light CCDs, is the material that chip's light sensors are is made from. With visible light, the material is silicon. With SWIR, the material is InGaAs (indium gallium arsenide). I don't think it's actually that much more expensive to manufacture InGaAs sensors than it is to manufacture silicon ones. Probably somewhat more expensive, but not orders of magnitude more expensive to manufacture an InGaAs chip than a silicon chip. A 640x480 visible light webcam will cost less than $100. A 640x480 SWIR camera will likely cost over $20000. Even LWIR cameras now cost about $3000 at the cheapest for 640x480 (and LWIR cameras are a lot harder to make, and require more exotic manufacturing procedures, than SWIR cameras). The insane prices for SWIR cameras seem to be a perfect example of price gouging (high prices with no logical economic reason for setting the prices so high).
So this brings me to the topic of this thread, that's stated in the title. Is there an SWIR camera manufacturer out there that is underselling their competitors (setting the price lower than competitors, to attract more customers)? Is there a place where I can buy a truly cheap SWIR camera? I've always wanted to know what the world around me looks like in this wavelength. From what I've read about it, it sounds like a fascinating wavelength in which to examine the world around me, but I've only read about it and seen a couple pictures online. I've never had a chance to see it for myself using an SWIR camera. So does anybody know where I can buy a cheap (price < $1000) SWIR camera? Is anybody even selling SWIR cameras for such a cheap price?