In my quest to find cheap rgb modules I stumbled across these modules on ebay. To date I have purchased two. One was a 400mW TTL module and the new one I picked up this weekend is a 400mW "analogo" module.
The cases for both of these modules are the same as are the diode and optic mounts. The TTL version only has one fan aimed at the green diode while the analog version has TWO. The optics and diodes are somewhat adjustable, but there is a ton of red glue inside so you're not going to have fun trying this.
The TTL Version has a terrible design flaw where the vent on the side of the laser is right behind the dichros. As a result, quite a bit of green and red light get through. I measured it and it's about 1mW according to my meter.
The analog module has this vent atop of the dichros so while you can peer in and see light... no real visible light escapes.
When I got these, I wondered if they had an IR filter for the 532nm green. I tested this by placing an ir filter I purchased from ebay in front of the module then checking the new power reading. The output dipped by a very small amount (1-2 mW) so either these do have an IR filter.. or this IR filter I purchased from ebay is just a piece of glass
I was also curious about claimed vs real power. Here's an image with my findings of the analog version using an ophir 20-c-a-1-y head. Either this head is out of tune.. or I didn't get all the mW I paid for:
Someone requested some beam profile pics so I took a few from 10m. The unit claims to have < 2.5mrad divergence.
I'm pretty happy with how well aligned the diodes are on my analog unit. The TTL unit's color alignment is acceptable.. but they noticeably separate even after 2.5m.
I haven't done any linear tests yet nor have I checked out the driving circuit yet.