Eye candy

[taggalucci]

Beautiful work Frank! Can't wait to see it come together.

[LaNeK779]

Soup-herb work

to say the least

[Solarfire]

Going into the end spurt on assembling the RGB module. Here some pictures of the UV gluing process. This module will be doing (unbalanced aperture output) min. 1W/532nm, 1.2W/638nm and 2.5W/445nm, with a max. overall beam profile of 4x4mm @ <1mrad on a 250x250mm footprint. I was very impressed by the strength and stability of the glass metal bond that can be achieved. The curing process is also very fast, within seconds of exposure, there is sufficient bonding going on so that the piece being glued won’t move anymore.

Ahh… The paper gluing template will be removed when everything is complete..

[chad]

Looks really great! How are dealing with the expansion / contraction of the tec?

chad

[Solarfire]

Looks really great! How are dealing with the expansion / contraction of the tec?

chad

Expansion/contraction of the TEC‘s is negligible, contact to the heat sink is made via 0.5mm highly flexible thermal pads (not shown in the pics) to compensate for slight unevenness of the individual mounts. This entire design is based on no/low tension build within the module; low thermal mass allowing fast thermal regulation, shortest possible thermal routs and shortest possible beam paths. The main reason for using a glass base plate is that glass has a 4 times higher structural stability, what expansion /contraction and warping is concerned, than with an aluminum base plate of equal dimensions. The diodes are run relatively conservative which will keep thermal regulation to a minimum even in extreme environments. The projector will be hermetically sealed with a full bridge TEC heat exchanger maintaining a 25°C internal projector environment.

[planters]

Once again, it should not go without saying; " Nice Work". It is clear that you are thinking outside the box and that is refreshing. How have you found the 4 point controlled steering mirrors you presented in Jan? Do they work as expected? Do you have any new thoughts about these? Am I right that you are using a silicone cylinder/disc as a central, extension spring?

Now about post #39! I love optical puzzles, but I'll admit you have beat me here. Is this just a line up of these various components prior to assembly and for display or are you constructing a module for a laser fusion beam line? Seriously though, how do you fine tune the PBS rotation?

[LaNeK779]

Now about post #39! I love optical puzzles, but I'll admit you have beat me here. Is this just a line up of these various components prior to assembly and for display or are you constructing a module for a laser fusion beam line? Seriously though, how do you fine tune the PBS rotation?

Top row, second pic sir eric. look closely and you'll see it
The pbs sits on top of a small metal cylinder that rotates freely. this is then locked in place via the set screw on the side of the square base

something like this neat idea, only Frank's is 3D adjustable, too. http://www.siskiyou.com/bases_adapte...rotation.shtml

[planters]

I did see that, but despite a gentle touch is this twist and lock fine enough to converge two input beams in the far field?

[Solarfire]

Once again, it should not go without saying; " Nice Work". It is clear that you are thinking outside the box and that is refreshing. How have you found the 4 point controlled steering mirrors you presented in Jan? Do they work as expected? Do you have any new thoughts about these? Am I right that you are using a silicone cylinder/disc as a central, extension spring?

Now about post #39! I love optical puzzles, but I'll admit you have beat me here. Is this just a line up of these various components prior to assembly and for display or are you constructing a module for a laser fusion beam line? Seriously though, how do you fine tune the PBS rotation?

Thanks Mr. Planters, as to the steering mirrors, yes they work just fine and you’re right about the silicone cylinder (7mmØ x 5mm) as a central, extension spring. These were tested for long term stability and are mainly designed as a “set it, affix it and forget it” type of mount.

As to the PBS/WP mounts, LaNeK779 already beat me to it what functionality is concerned. As to the fine adjusting/positioning of the PBS or placement of any other components of this build for that matter, I have a specially made jig for precision component placement and adjustment. Sorry no pictures of this one but so much I can tell, this jig has a level plane surface for affixing a baseplate and a reference laser for far field adjustment, it allows for precision component placement and gives a 25cm leverage effect which allows for very precise placement/adjustment of componets what far field is concerned.

Hey Chris, nice find on those mounts, had no idea that there was something similar out there, unfortunately too big for my purposes.

[LaNeK779]

Hey Chris, nice find on those mounts

well, this credit should go to professor mixedgas