Ultraviolet photography sensor will pick up reflected infrared radiation as well as ultraviolet, which may obscure the details that would be resolved by ultraviolet alone. Most types of glass will allow longwave UV to pass, but absorb all the other UV wavelengths, usually from about 350 nm and below. For UV photography it is necessary to use specially developed lenses having elements made from fused quartz or quartz and fluorite. Lenses based purely on quartz show a distinct focus shift between visible and UV light, whereas the fluorite/quartz lenses can be fully corrected between visible and ultraviolet light without focus shift. Examples
Invisible Light Invisible Light "Invisible Light" is a song by American band Scissor Sisters, serving as the third and final single from their third studio album "Night Work". The track, which features guest vocals by actor Sir Ian McKellen, was what lead singer Jake Shears felt should have been the first single released for "Night Work", even after going with "Fire with Fire". The video for "Invisible Light" features a woman having a series of nightmares. She sees herself being dragged into the woods by a group of men, sleeping in a boat on a river, and attending her own funeral. The