ABSTRACT
There are many subjects where revealing the hidden patterns or features within can be made visible by photographing them using wavelengths outside of the range of human vision. UV and IR photographic techniques were used frequently in the days of film photography, for medical, forensic, and other technical applications, as well as landscape photography. Modern digital cameras record images using a light sensitive silicon chip, of either a CCD or CMOS type. A UV only conversion is where the filter is removed from the front of the sensor and replaced with a filter that absorbs all visible and IR wavelengths. Most digital cameras will require modification to enable the recording of UVR. Most lenses contain optical glass and crown glass, which is used in windows. There is a popular misconception that you cannot make UVR images with a normal glass lens. This probably explains why there is a relatively small amount of UVR photography being carried out today.
