Does the UVCorder™ image UV fluorescence?
There is a very common misperception that UV imaging is the same thing as UV Fluorescence imaging. The UVCorder™ records UV light reflected or emitted from scenes or objects. The UV channel on the UVCorder™ detects UV light only, not visible or infrared light. Fluorescence is a phenomenon whereby light at one wavelength (often UV) strikes a material that re-emits light at a different, longer wavelength. The classic case is a fluorescent highlighter pen. UV light will cause the pigment in the marker to emit yellow light, which is easily detected by the eye. If one images a fluorescent object or material with the UV channel of the UVCorder™, it will nearly always look dark, since UV light tends to be absorbed by the fluorescent material. Any visible fluorescence emitted by the material is not detected by the UVCorder™, since it is designed to see only near-UV light.
