As a biophysicist and researcher on vision, and a designer of research equipment for neurophysiology and research on vision, I am fascinated by the INDIGLO watch. I know of no other device that can produce uniform field of light in a flat plate about 3 cm. in diameter and about 1 mm. or less thick, and, furthermore, use so little energy that I have not had to change the battery in over 2 years. I would greatly appreciate a thorough explanation or references to published technical papers.
Many thanks in advance for any info.
Here is a link to Peter J Kindlmann. I believe, from my searches on the web, that he worked on developing Indiglo. US patent 4527096 refers. Maybe you could make direct contact with Professor Kindlmann via this link.
Hope this helps.