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Thread: which glass for laser window in case

  1. #1
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    Default which glass for laser window in case

    hi, building my first projector and the question raised what type of glass to use for the front window where the laser will go from inside to outside.
    I have been looking at the local glass shop for non-reflective glass, is this good enough?
    this is also used to frame photo's on the wall.

    Michel

  2. #2
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    Default

    you should go for BK7 glass, broadband (400nm-700nm) AR coated glass
    but it may prove hard to find and/or expensive...


    (by the way, if you find it online, do post a link. i will be needing one, at some time from now)
    "its called character briggs..."

  3. #3
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    Lightbulb

    Hey Gents -

    Quote Originally Posted by LaNeK779 View Post
    (by the way, if you find it online, do post a link. i will be needing one, at some time from now)
    Unless you're using an ungodly-amount of 405nm "CDAR" by Edmund Optics is the 'cats-pajamas' - available in all sorts of sizes, and even larger-plates, you can 'cut down' yourself... here's a post I did awhile back about the stuff, with a link, etc -

    http://www.photonlexicon.com/forums/...627#post148627

    Hope this helps, m8's...
    cheers..
    j
    ....and armed only with his trusty 21 Zorgawatt KTiOPO4...

  4. #4
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    Default

    hey, never saw a cat in pajamas... and a very nice price for them, too. definately worth a try. i suggested bk7, only because of the 445. but since only 405 is affected and i have no 405 installed i'm fine


    i read that back reflections are effectively eliminated. but still, do you think it's a good idea to mount the window just slightly tilted (just a tiny bit), so what's left of the back reflections is directed elsewhere? edit here--> reading your older post, point taken, tilt is the way to go. thanks

    thanks for your hints dsli_john
    Last edited by LaNeK779; 12-23-2010 at 02:45. Reason: question already answered...
    "its called character briggs..."

  5. #5
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    Quote Originally Posted by LaNeK779 View Post
    hey, never saw a cat in pajamas...
    Your GF doesn't ever wear lingerie? jk...

    Quote Originally Posted by LaNeK779 View Post
    thanks for your hints dsli_john
    U bet... ...but who's "John"?

    cheers...
    j
    ....and armed only with his trusty 21 Zorgawatt KTiOPO4...

  6. #6
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    Default

    oh, we've been around each other for some time, so all the fancy lingerie is stuffed away in a drawer by now. nowadays all i see is some unidentified creature moving around covered in a blanket








    i realised the surplus "h" in john a bit too late, sorry, my bad. jon from now on
    "its called character briggs..."

  7. #7
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    Quote Originally Posted by LaNeK779 View Post
    nowadays all i see is some unidentified creature moving around covered in a blanket
    Oh wow, you guys have a Ferret?? Cool!

    Quote Originally Posted by LaNeK779 View Post
    i realised the surplus "h" in john a bit too late, sorry, my bad.
    no worries, I was only teasin' ya...

    cheers...
    j
    ....and armed only with his trusty 21 Zorgawatt KTiOPO4...

  8. #8
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    Default

    I use a camera lens filter on my projector and epoxied an adapter ring to the front. This allows me to easily remove the filter glass by unscrewing it. If it gets dirty I can unscrew it and clean it. Or, if it is really dirty I can throw it in the trash and buy another for $30 or so.

  9. #9
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    Quote Originally Posted by dsli_jon View Post
    Oh wow, you guys have a Ferret?? Cool!
    cats and ferrets....

    sneaky little thing there

    http://www.youtube.com/watch?v=6_vtM6qANiI
    "its called character briggs..."

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