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Old 10-07-2014, 12:40 AM #1
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Default Conceptual design of anamorphic prisms on sinner focus ring. Pix!

helloooo
Lately I have been following the mits 1.8W thread. There has been some chatter on cylindrical vs anamorphic corrective optics. This is very interesting because it seems new diodes pulled from projectors tend to have poor divergence(most likely because their sleds already have optics for their specific purpose). Corrective optics are becoming more desirable.

I have this idea. It's simple, not ground breaking by any means, may have been done before but I'm curious if it will work.

Please excuse the rubber mock up of the prisms. They will be slightly larger but according to my measurements will fit. Nothing seen it the photos is permanently fixed.
-The platform is an aluminum heat sink from some CPU ground down to fit.
-Sinner host cypress cu/Al IIIB








One issue I can foresee is the correcting the polarization with multimode diodes while trying to focus the laser. With the use of Teflon tape on both sides of the lens you could make fine adjustments OR focus the laser first then glue the anamorphic prisims to the platform. The lens also could rotate into the aluminum focusing knob.
I am no optics expert this is just an idea.
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Old 10-07-2014, 02:03 AM #2
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Very similar to the idea I brought up in cdbeams (I think?) Correction thread where he made that attachment for a handheld, except mine was had a metal sleeve that theeaded over it, and the whole thing threaded onto a custom aixiz lens holder.

This is a good start for corrected handhelds, though. Would be nice to be able to get some cylindricals in a small form factor as well. Didnt dragonlasers have a corrected 445 handheld, and wickedlasers have a corrected 638?
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Old 10-07-2014, 02:07 AM #3
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Nice machining but you're right to suspect issues with polarization. Unless the diode can move along with the corrective optics it won't work. It has to be stationary with the diode.

Last edited by VisibleGreen; 10-07-2014 at 02:09 AM.
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Old 10-07-2014, 11:16 AM #4
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

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Originally Posted by crazyspaz View Post
Very similar to the idea I brought up in cdbeams (I think?) Correction thread where he made that attachment for a handheld, except mine was had a metal sleeve that theeaded over it, and the whole thing threaded onto a custom aixiz lens holder.

This is a good start for corrected handhelds, though. Would be nice to be able to get some cylindricals in a small form factor as well. Didnt dragonlasers have a corrected 445 handheld, and wickedlasers have a corrected 638?
IIRC Cdbeams sandwiched the 2 prisms between sheets of acrilic. The acrilic also sandwiched a standard Aixiz metal ring. There are various configurations here, I think we should try some out.
I'm not sure what DL has in their lasers.
Quote:
Originally Posted by VisibleGreen View Post
Nice machining but you're right to suspect issues with polarization. Unless the diode can move along with the corrective optics it won't work. It has to be stationary with the diode.
The way I see it you have a few places for adjustments. You could also turn the 12mm module in the host then lock it in with a set screw.
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Old 10-08-2014, 03:43 AM #5
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

OK....." Further down the Rabbit Hole we go !" I will now post here. Thanx DWU for starting this thread! See this latest design V7 attached drawing.

So...the latest and greatest EZ design (V7) now attaches to the OD of the Aixiz 12 x 5 module. We really do not have many options ! Attach to the Aixiz module OD or to the collimation lens OD. Just have the Aixiz module stick 1/4" proud of the module heatsink. This will then deliver a section for the EZ to hook on to !

And, by locking on to the Aixiz module OD with the 4-40 set screw...this solves two problems at the same time;

*The focus of the collimation lens can be adjusted independent of the EZ adaptor.

* The EZ radial adjustment can be done without the problem of undesired rotation of the Collimation lens.

I will machine up another prototype to verify this V7 design works. Stay tuned ! Time to hammer more Photon's !
Attached Thumbnails
Conceptual design of anamorphic prisms on sinner focus ring. Pix!-ezca-cl-v7.png  
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Last edited by CDBEAM777; 10-08-2014 at 04:31 AM. Reason: Added text and updated drwg.
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Old 10-08-2014, 06:19 AM #6
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

If you can make that flat piece to hold the optics on nice and straight I'll take like ... a dozen at least

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Old 10-08-2014, 02:14 PM #7
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Well, in answer to the mention of a dual design by upaa27, with two 7A75's...see the attached drawing ( Too Blue Extreme V5).

Problems remain with fit as shifting the dual module holder over has now caused clearance issues with the Acrylic canopy cover. I may need to shift the dual module holder back to the center. But...when shifting back over, the clearance problem then becomes between the Flexmount for the PBS and the Acrylic canopy curvature on the other side ! Hmmm...a typical " Blivitz" ! A smaller PBS mount may provide enough clearance on the other side ! I may need to change over to a mini-M1 mount for the PBS cube to then provide clearance on that side ! Many components in a small platform ! Just " mov'in the furniture around " !

Sorry for the slight off-topic meander....blame upaa27 !! My mind does a lot of " meandering "...mmm...I need more " technical training "
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Last edited by CDBEAM777; 10-08-2014 at 02:32 PM. Reason: clairification
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Old 10-08-2014, 02:56 PM #8
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Quote:
Originally Posted by CDBEAM777 View Post
Well, in answer to the mention of a dual design by upaa27, with two 7A75's...see the attached drawing ( Too Blue Extreme V5).

Problems remain with fit as shifting the dual module holder over has now caused clearance issues with the Acrylic canopy cover. I may need to shift the dual module holder back to the center. But...when shifting back over, the clearance problem then becomes between the Flexmount for the PBS and the Acrylic canopy curvature on the other side ! Hmmm...a typical " Blivitz" ! A smaller PBS mount may provide enough clearance on the other side ! I may need to change over to a mini-M1 mount for the PBS cube to then provide clearance on that side ! Many components in a small platform ! Just " mov'in the furniture around " !

Sorry for the slight off-topic meander....blame upaa27 !! My mind does a lot of " meandering "...mmm...I need more " technical training "
Thanks CDbeam! I may just be able to mount a cylindrical right onto the front of the pbs with a 10mm focal length.
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Old 10-08-2014, 04:56 PM #9
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Cdbeams, I like the drawing it looks great one thing I'm curious about and maybe im missing it in the drawing but if the 12x30mm module protrudes just a little would you have to move the set screw accordingly? I noticed some heatsinks the set screw applies pressure just before the threads.
I know this could be rectifyed by leaving the aluminum housing the module threads into on but with some driver/hosts there hasn't been room for the housing.

I really like the design. Just curious about ^^ part.
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Last edited by Down with Umbrella; 10-08-2014 at 04:58 PM.
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Old 10-08-2014, 06:55 PM #10
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

CDBEAM couldn't you just slap the cylindrical on the end of the combined beam? Just expand the diodes both? Shouldn't mess with polarization afaik
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Old 10-08-2014, 07:11 PM #11
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Quote:
Originally Posted by Down with Umbrella View Post
Cdbeams, I like the drawing it looks great one thing I'm curious about and maybe im missing it in the drawing but if the 12x30mm module protrudes just a little would you have to move the set screw accordingly? I noticed some heatsinks the set screw applies pressure just before the threads.
I know this could be rectifyed by leaving the aluminum housing the module threads into on but with some driver/hosts there hasn't been room for the housing.

I really like the design. Just curious about ^^ part.
DWU, you have a point. One could just slice off the back end of the Ally screw-on barrel if it was too long. The goal is to get good clamping pressure so as to secure the module and get the best thermal transfer possible.
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Old 10-08-2014, 07:17 PM #12
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

[/QUOTE]CDBEAM couldn't you just slap the cylindrical on the end of the combined beam? Just expand the diodes both? Shouldn't mess with polarization afaik[/QUOTE]

Maybe !! I am so used to getting the Cylindericals into the optical train ASAP for the quick divergence of the P-73...that I forgot that the arrangement could work that way....and we eliminate the need for two sets of CL 's down to one ! See drawing V6. I have made some other modifications, but I still have a problem with the PBS mount clearing the canopy !
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Last edited by CDBEAM777; 10-09-2014 at 02:01 AM. Reason: Trying to link better pic
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Old 10-08-2014, 09:44 PM #13
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Looked at the cylindricals on edmundoptics. Anyone selling them coated here for cheaper?

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Maybe !! I am so used to getting the Cylindericals into the optical train ASAP for the quick divergence of the P-73...that I forgot that the arrangement could work that way....and we eliminate the need for two sets of CL 's down to one ! See drawing V6. I have made some other modifications, but I still have a problem with the PBS mount clearing the canopy !!
Hmm. I am thinking of machining an extended optics mount for something like this.

Last edited by upaa27; 10-08-2014 at 09:47 PM.
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Old 10-09-2014, 07:12 AM #14
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

I can send one pair of cylindrical lens as sample to compare it with anamorphic prisms in exchange for well made review of my lens vs prisms. The market price is now 65 USD.

I know they are hard to adjust, but power loss <0,7%. What do you think about it guys?

Maybe you Down with Umbrella ? I will help you to adjust them via skype.
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Old 10-09-2014, 08:58 AM #15
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Tomorrow system, im afraid I might not be the best option. Currently I don't have a pair of anamorphic prisms to compare them against. The host in the OP is empty. I'm waiting on a good diode option to put in it; Possibly the 1.8W mits if it EVER surfaces.

most of my funds have been going to the tesla coil build.

Thank you though!
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Old 10-09-2014, 09:07 AM #16
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Default Re: Conceptual design of anamorphic prisms on sinner focus ring. Pix!

Since I'm quite new to forum members, maybe you know someone who already have prisms and would like to test cylindrical optics ?
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