Cheap way to combine two red beams?

[jander6442]

Here is a link Flexure Optical Mount - Opto-Mechanics DDL for a cheap optical mount.

 

[youfellow]

Your two red beams must be somewhat different. You can't combine two beams that have same wavelength, polarization, into one beams that has the same size.

If your two red beams are slightly different at wavelength (such as 635 nm vs 650 nm), you may can use a sharp-cutoff dicrhoic mirror or a dispersion prism.

If your red beams have different polarization (which is easy to achieve by rotating the sources), you can use a PBS to combine them.

If you don't need to have the resulting beam same size as the incident beam, you can use a turning mirror to combine in into a larger beam

No, the regular 50/50 beam splitter/combiner won't do the work, you will have two output beam that are 50/50 minus some reflection loss.

I want to combine beams from two red lasers so I can get enough red light to use it in laser scanner.

What would be the cheapest way to do it?
Is there any optics in sleds that can do that job? (I played with some optics from sled but couldn't find any useful for this use)