Thought I'd start a new topic on this. I have more or less completed my fully solid state RGB projector. The basic components are:
- 2 MaXYZ 200mW 660nm diode lasers with analog modulation combined using a polarizing beam splitter cube
- 300mW 532nm green DPSS with analog modulation
- 250mW 473nm blue DPSS with analog modulation
- Cambridge 6215 scanners tuned for 30KPPS @ 60 degrees
My first build looked like this:
It worked OK despite having to use a 100mW ttl modulation green laser while waiting for the replacement for my dead Laser Quantum POS. I figured out that I was losing a lot of power in the dichros so I got some better filters and rearranged the layout:
I'm getting >95% throughput for all colors now. After tuning the Pangolin palette to get a nice balanced white, it looks really good
It's hard to get good pictures or videos of a laser show, but re-playing all the Pangolin beam shows with full analog color instead of ttl green has been great fun. I am really happy I held out for analog modulation on all 3 lasers. If your software supports it (Pangolin does, Alphalite doesn't) it's totally worth it.