Photometers or light meters are radiometers that include a filter and photodiode and responds based on the average human eye: the CIE 1924 luminosity function V λ. However, the light sensitive diode ...

A multicolor laser pointer you can use to change the color of the laser with a button click -- similar to a multicolor ballpoint pen -- is one step closer to reality thanks to a new tiny synthetic ...

We now take LED lighting for granted, but acheiving a specific colour is actually quite complicated. Why is that? At some point, reasonably soon, full-colour mixing will become more the rule than the ...