The development of new blue semiconductor laser devices in Japan is building on an expertise in gallium-nitride semiconductor-based optical devices, used for LEDs. By tweaking the crystal layers ...

A semiconductor laser that emits light in the 400-450 nm range. Although it was very difficult developing blue lasers, which emit smaller wavelengths than other colors, blue lasers became ...

It allows high resolution measurements of extremely small objects. The scanner is built with a blue-violet laser diode and projects a 10 mm long laser line at a profile resolution of 1280 measuring ...

On a screen opposite the blue laser, they saw a dark line where the green laser blocked blue light leaving the crystal. This curious phenomenon arises from a property of the ruby itself.