These resolutions are reduced compared to visible light imagers simply because thermal detectors should sense Vitality which includes much bigger wavelengths than seen light, necessitating Each individual sensor component to become substantially bigger. That IR light is then detected to produce the FT-IR spectrum, which is like a “chemical fingerprint” https://infrared-thermal-imaging79123.blogsvirals.com/27606976/ir-thermal-imaging-no-further-a-mystery