From photographer Alan Jaras (or Reciprocity on Flickr):
These are light refraction patterns or ‘caustics’ formed by a white light beam passing through shaped and textured transparent forms. The pattern is captured directly on to 35mm film by removing the camera lens and putting the transparent object(s) in its place. Colours are introduced by placing complex coloured optical filters directly in the light beam.
The processed film is digitally scanned for uploading. Please note these are not computer generated images but a true analogue of the way light is refracted by the objects I create.