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Thread: dichros help

  1. #1
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    Default dichros help

    hi i am a noob built my first green projector that works well decided to add red so i brought a green dichro and fired the red from behind it the green dichro does not pass more than about 60% red? should i have got a red dichro and reflected the red and passed the green

  2. #2
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    Not necessarily. There are green dichros that offer a lot more performance than what you are seeing. Where did you get the dichro? Any specs?

  3. #3
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    Default dichros help

    got them from uqg(optics)ltd in the uk

    Specification

    COLOUR:BLUE:GREEN:RED:Spectral Data:T≤ 5% Abs.400-450nm
    T= 50% 49010nm
    T≥ 80% Avg. 520-760nm T≥80% Avg. 400-480nm
    T=50% 500 + 10/-5nm
    T≤10% Abs. 520-560nm
    T=50% 590 + 10/-5nm
    T≥80% Avg. 620-760nm T≥ 80% Avg.400-560nm
    T= 50% 60010nm
    T≤ 5% Abs. 640-760nm

  4. #4
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    I'm no expert but those specs don't seem very good. Check out the dichros that Edmunds Optics has. They are much better.

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    Quote Originally Posted by badger1666 View Post
    should i have got a red dichro and reflected the red and passed the green
    There is a basic configuration for a laser projector. It was designed for a reason.
    I hired an Italian guy to do my wires. Now they look like spaghetti!

  6. #6
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    Quote Originally Posted by carmangary View Post
    I'm no expert but those specs don't seem very good. Check out the dichros that Edmunds Optics has. They are much better.
    COLOUR:BLUE:GREEN:RED:Spectral Data:T≤ 5% Abs.400-450nm
    T= 50% 49010nm
    T≥ 80% Avg. 520-760nm T≥80% Avg. 400-480nm
    T=50% 500 + 10/-5nm
    T≤10% Abs. 520-560nm
    T=50% 590 + 10/-5nm
    T≥80% Avg. 620-760nm T≥ 80% Avg.400-560nm
    T= 50% 60010nm
    T≤ 5% Abs. 640-760nm


    80% 80%!!!!!! My car windshield does a better job!!!!!
    I hired an Italian guy to do my wires. Now they look like spaghetti!

  7. #7
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    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    [% Abs. 640-760nm


    [/I]80% 80%!!!!!! My car windshield does a better job!!!!![/QUOTE]

    rotate the dichro in case its a polarization issue, or change the angle of tilt. If that doesnt work call up One Stop Laser Shop in florida , or Precision Projection Systems in Ceritos California, or bjomejag on ebay and get a
    better dichro.

    Steve

  8. #8
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    Quote Originally Posted by mixedgas View Post
    bjomejag on ebay
    I got my R/G dichro from there and it seems to perform as well as my Edmund's RG/B and was close to 50% less, although Edmund's is the standard and for $45, it is a small price to pay considering you pay how much for the lasers you are sendng though it.
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

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