ABSTRACT
The basic principle of ultraviolet (UV) reflectance photography is to use a camera system to record the UV radiation reflected from a subject, and absorb any visible light or infrared (IR) radiation. For many applications, in particular forensic photography, colour in UV-reflected photography is not required, and it may be worth investigating monochromatic cameras. Because of the technical difficulties inherent with UV-reflected photography, there is the tendency to only photograph what is known to exist, rather than use it as an overall investigative tool. Many digital single-lens reflex (DSLRs) and other camera types now have excellent video recording capabilities, which can be utilised for UV reflectance photography. A lens specifically designed for UV transmission is ideally constructed from quartz (or fluorite) glass elements. The basic requirement for a UV-transmitting filter is for it to absorb all visible light and IR wavelengths, and just transmit UV wavelengths.
