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Thread: Tested with anamorphic prism pair

  1. #1
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    Default Tested with anamorphic prism pair

    Francesco was so kind to loan me a prism pair to test with the 445nm diode.

    Normal the the beam is a very clean <1mm beam with a divergence of 2,6-3 mRad (slight out of focus divergence gets a little bit better but not the beam)

    With the prism pair I could easily get 1,2mRad, with good alignment 1 mrad should be possible.

    It still is a little bit of a line because the slow axis is 0,2mrad.

    at 30 meters I ended up with a 40x8mm beam

    More than reasonable for beamshow, and even usable for graphics as most DPSS lasers will have a fatter beam at that distance.

    Last edited by mccarrot; 06-17-2010 at 14:02.

  2. #2
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    Good news! Could you already do some measurements of the additional losses though the prisms? They have a MgF2 coating so it should be ok...
    Next time I use my RGB lasers I will measure the divergence of my "RGB Lasersystems" 445nm blue. I think it is quite similar.
    http://www.collimated.com/Documents/...imated_PL3.png
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  3. #3
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    First results show 15% loss over both prisms, for prisms I think thats pretty good.

    Tomorrow I will do some more accurate measurements.

  4. #4
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    mmm 1mrad? NICE

  5. #5
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    Picture time!!!

    I also compared it to a Viasho 600mW 532nm. the beam of the blue is much thighter than the green, so a prism pair with this lens is a perfect setup

    Its near to 1mRad and give a oval beam.
    Attached Thumbnails Attached Thumbnails P1360589.JPG  

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  6. #6
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    Looks like what I have done as well...nice setup there !
    You are the only one that can make your dreams come true....and the only one that can stop them...A.M. Dietrich

  7. #7
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    Default prism pair

    Quote Originally Posted by Francesco View Post
    Good news! Could you already do some measurements of the additional losses though the prisms? They have a MgF2 coating so it should be ok...
    Next time I use my RGB lasers I will measure the divergence of my "RGB Lasersystems" 445nm blue. I think it is quite similar.

    hi francesco
    any chance you will share where these prism pairs come from and how much they cost ??
    thanks

  8. #8
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    Is there any interest in this setup? that means a high quality collimator with 445nm AR coating and a prism pair.

    Optional I can also supply a collimator mount, diode driver and tec driver + tec.

  9. #9
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    I certainly will be interested in a price and where to get them from (prism pair, collimator and collimator mount) - it's the last bits on my list that I need to get before I start my build.

    Any info GREATLY appreciated

    Jim
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  10. #10
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    Default lens

    @ mc carrot
    will your lens fit aixiz size thread M9 x .5,pitch ??
    as i have custom mounts that use that thread
    thanks

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