Results 1 to 6 of 6

Thread: Looking for red green dichro with mount

  1. #1
    Join Date
    Aug 2007
    Location
    Indianapolis, IN
    Posts
    196

    Default Looking for red green dichro with mount

    Just so I'm sure - is it the transmitted beam that loses more energy than the reflected one?

    If so then I'm after afilter that passes green and reflects red.

    Just so I know - do these things have a good and bad side?

    I bought a $10 dichro from Electronic Goldmine for testing, and it seems to reflect green and pass red - not really what I want.

    The coating seems to be on one side only.

    Steve

  2. #2
    Join Date
    Jan 2007
    Location
    Sheepsville, Wales, UK
    Posts
    3,396

    Default

    Quote Originally Posted by shobley View Post
    Just so I'm sure - is it the transmitted beam that loses more energy than the reflected one?
    It depends on the spec of the dichro itself - generally yes but you may need to experiment with the filter to see.

    Quote Originally Posted by shobley View Post
    Just so I know - do these things have a good and bad side?
    Yes the coating will be on one side only - this is the surface that the reflected beam should bounce off and the transmitted beam should exit

    Quote Originally Posted by shobley View Post
    I bought a $10 dichro from Electronic Goldmine for testing, and it seems to reflect green and pass red - not really what I want.
    But if it still mixed the 2 colours you want wheres the problem - appart from it loosing more red than you want. My edmunds optics green reflect filter transmits 95% red and reflects 93% green. The red reflect filters are very good at reflecting red, again EO ones reflect 98% red and transmit 94% green - so thers isnt much in it. 3% red is all you are talking about I guess.

    Rob
    If you need to ask the question 'whats so good about a laser' - you won't understand the answer.
    -----------------------------------------------------------------------------------------------
    Laserists do it by the nanometre.

    Stanwax Laser is a Corporate Member of Ilda

    Stanwax Laser main distributor of First Contact in UK - like us on Facebook http://www.facebook.com/FirstContactPolymerCleaner
    www.photoniccleaning.co.uk

  3. #3
    Join Date
    Apr 2007
    Location
    Toronto Canada
    Posts
    1,120

    Default

    Quote Originally Posted by shobley View Post
    The coating seems to be on one side only.
    Steve
    This is a very cheap dichro!. Good ones have both sides coated. One side to reflect as much as possible other side to eliminate as much of reflection as possible.
    I hired an Italian guy to do my wires. Now they look like spaghetti!

  4. #4
    Join Date
    Aug 2007
    Location
    Indianapolis, IN
    Posts
    196

    Default

    Can someone point me to the product on the Edmund's Optics site?

    I see red pass and green pass filters, but nothing specifically designed as a red/green dichro...

  5. #5
    Join Date
    Dec 2006
    Location
    Pflugerville, TX, USA
    Posts
    1,977

    Default

    http://www.edmundoptics.com/onlineca...=2433&search=1

    The color of the dichro indicates the color that will be reflected. So, if you want to reflect red and pass green and blue get a red dichro. I use the one inch size because it gives me a bigger target.

  6. #6
    Join Date
    Jan 2007
    Location
    Sheepsville, Wales, UK
    Posts
    3,396

    Default

    From whay Ive heard the dichros from one stop laser shop are supposed to be as good if not better than edmunds and are cheaper - apparently.

    Rob
    If you need to ask the question 'whats so good about a laser' - you won't understand the answer.
    -----------------------------------------------------------------------------------------------
    Laserists do it by the nanometre.

    Stanwax Laser is a Corporate Member of Ilda

    Stanwax Laser main distributor of First Contact in UK - like us on Facebook http://www.facebook.com/FirstContactPolymerCleaner
    www.photoniccleaning.co.uk

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •