My first dual

[absolom7691]

In an attempt to save space while building my 4-head projector, I decided to go with a two tier build. This is the first of two platters that will go in an overall projector housing with a bottom level for amps and PSUs. One of these scan heads will be a straight shot. The other will have a few rotary solenoids with scan glass effects. The next platter will also be the same. The goal is a "planetarium" style projector with 4 heads, 2 of which will also have selectable scan thru filters. This will eventually be married to my lumia projector. I have all the glass, lasers and motors for my lumia.... I just need time!!!!

First pics. More to come.

8" X 12" platter:
dual_platter.jpg

Dialing in the alignment on the first side:
dialing_in01.jpg

[swamidog]

In an attempt to save space while building my 4-head projector, I decided to go with a two tier build. This is the first of two platters that will go in an overall projector housing with a bottom level for amps and PSUs. One of these scan heads will be a straight shot. The other will have a few rotary solenoids with scan glass effects. The next platter will also be the same. The goal is a "planetarium" style projector with 4 heads, 2 of which will also have selectable scan thru filters. This will eventually be married to my lumia projector. I have all the glass, lasers and motors for my lumia.... I just need time!!!!

First pics. More to come.

8" X 12" platter:
dual_platter.jpg

Dialing in the alignment on the first side:
dialing_in01.jpg

nice!

building a dual head system is pretty high on my list. have you considered flipping the orientation on one side so you can move the scanner blocks closer together?

[absolom7691]

I would love to see you crank out some dual-head Swami shows! Your projector is already traveling at the speed of light. With two scan pairs and your LSX skills, I think it would actually be able to travel through time!!!

I had thought about changing the orientation but just decided to leave it. The picture is hard to gauge the size of the platter but the scanners are only 7" apart. I am getting the second scan pair dialed in tonight and I should be able to see if I even need to use an geometric correction. If it becomes too extreme, I may change it. It also depends on throw distance too. The greater the projected distance, the less I'll have to worry about it.

[polishedball]

Beautiful work, did you run into any problems centering near field on the dichros. Whenever I skip using a bounce mirror it always seems like one is slightly off from pressing in host, or mount.

[absolom7691]

Beautiful work, did you run into any problems centering near field on the dichros. Whenever I skip using a bounce mirror it always seems like one is slightly off from pressing in host, or mount.

Thanks. Yes, it's a bit of a pain. I also found that the collimators move slightly in the diode modules. That also changes the beam angle. I wanted to use bounce mirrors but since these are single-mode diodes, every mW counts! They line up pretty well though. Having that final steering mirror helps immensely but the NF is not quite perfect yet. I need to futz with it some more.

[masterpj]

Are you using some kind of connector to connect to the laser diodes or is this just heat shrink tubing I'm seeing?

[absolom7691]

Are you using some kind of connector to connect to the laser diodes or is this just heat shrink tubing I'm seeing?

I have a those are just the KK connectors. I have breakout boards that everything connects to.

[absolom7691]

I just uploaded a video of my dually projecting an abstract.

[swamidog]

beautiful and awesome old school knob box style.

[dnar]

Looking mighty fine!