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Thread: groupbuy for anamorpic prisms?

  1. #11
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
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    3,694

    Default

    I would be happy to give the groupbuy a shot

    Quote Originally Posted by RedlumX View Post
    I was pondering about a GB, as I have found a manufacturer with good price if 20 or so are ordered. The details are still pending. It would be for prisms coated for 445nm and made from BK7, which gives less loss at 445nm than the usual SF11. But I don't have the time to mess around with sending out dozens of packets and deal with all the payments etc. If someone else likes to do it, I can give details and I am also willing to pay more to honor the effort.
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  2. #12
    Join Date
    Nov 2007
    Location
    Sydney, Australia
    Posts
    600

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    I'd throw in for two sets as well

    Troy
    RTI Piko RGB 4 Projector
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  3. #13
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
    Posts
    2,180

    Default prisms

    I have seen the results of the cylindrical lens and they destroy the beam from a prism. Wait for the machining to get done. Work on your reds.

  4. #14
    Join Date
    Feb 2007
    Location
    Herts, UK
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    Quote Originally Posted by kecked View Post
    I have seen the results of the cylindrical lens and they destroy the beam from a prism. Wait for the machining to get done. Work on your reds.
    Eh? you're not going to need to use cylindrical lenses and anamorphic prisms

  5. #15
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
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    2,180

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    the result with lens is better then prism

  6. #16
    Join Date
    Feb 2007
    Location
    Herts, UK
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    1,253

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    Ah gotcha ......................

  7. #17
    Join Date
    Jan 2006
    Location
    Switzerland
    Posts
    129

    Default

    Actually mccarrot was kind enough to take the effort for a group buy off me.

  8. #18
    Join Date
    Dec 2008
    Location
    veenwouden
    Posts
    2,545

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    Great to see that you want to do a groupbuy Mccarrot. Also nice to have the dimensions so i can start with drawing the longer baseplate. I also thinking about adding a small table to make the prisms adjustable to the right angle oposite to eachother

  9. #19
    Join Date
    Apr 2008
    Location
    Amsterdam, NL
    Posts
    2,098

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    Quote Originally Posted by kecked View Post
    the result with lens is better then prism
    But with a prism pair I allready got a better beam than my GREEN, so whats the use to make a 0,7mRad blue if you green is only 1,5mRad.
    Last edited by mccarrot; 06-22-2010 at 13:02. Reason: I put red instead of green :)

  10. #20
    Join Date
    Aug 2007
    Location
    Switzerland
    Posts
    22

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    The Prisms from us (SwissLas) is not a Groupbuy!

    You can order them directly from us by mail to info@swisslas.ch

    But yes, deliverytime will be middle - end of July because our stock is empty!

    Important difference with our prisms is that ALL 4 SIDES are AR coated speciall for 445nm and speciall for this expansion ratio (angles), so this is the reason why there are directly glued to the holder!
    You have a total loss of only about 7%!

    AND The Result with Cylindrical lenses is much bader then with prisms! We made a lot of tests with this two years ago.

    According Prices:
    The Prismpair with holder costs 110 CHF (with acutal exchange rate about 100USD)
    The collimating lense (loss 1%) in M9x0.5 holder costs 65CHF (with acutal exchange rate about 60USD)

    transportcosts from Switzerland to outside Europe with Priority service is 26CHF (about 23USD)
    Last edited by vakuum; 06-23-2010 at 10:56.

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