Tiny manufacturing imperfections in optical components normally go unnoticed. Yet they can alter light in surprisingly ...

Excessive blue light can cause accelerated aging in flies because this exposure can cause cellular damage, according to a study released Wednesday. Because the signaling chemicals in the cells of ...

If you had an array of high power addressable LEDs, how would you project them onto a wall? Perhaps you’d use a Fresnel lens, or maybe an individual lens on the top of each. [Joo] faced this problem ...