Dichro (joining two beams)
A dichro is used to join two laser beams of different wavelength together.

This is a 25mm dichro for joining 650nm and 532nm, purchased from Edmund Optics


Adjustable dichro mount

 

this dicro was purchased from ebay - Dichro

im using a 100mw green and a 200mw red - to get a true colour match it should be 4:1 (red:green)