|
The thing that made laser sights practical was the development of laser diodes.
The problem with green lasers is that there are no green laser diodes. In order to get green light from a laser diode, you have to start with an IR laser diode and run the output through a frequency doubler to convert it up to the visible spectrum at the green wavelength.
Then you have to filter out any remaining IR light components from the beam for safety.
That means that green lasers can't be as compact as red lasers because of the additional components. Also, because of the losses in the system, they consume more input power for the same output power level. And, of course, it all translates to additional cost for the final product.
I think green lasers will gain in popularity, but it's not likely that they will take over the market unless someone makes a breakthrough in the underlying technology.
|