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Thread: Spatial filters thread?

  1. #1
    Join Date
    Feb 2008
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    East Sussex, England
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    Default Spatial filters thread?

    Can someone link me up to Eric's/Planters original spatial filter thread please, I cannae find it!

    Am i right in thinking its simply a case of adding 'shutters' (razor blades, etc) at the beam waist between the correction optics?
    Frikkin Lasers
    http://www.frikkinlasers.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

  2. #2
    Join Date
    May 2011
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    Yorkshire, UK
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    Default

    Hi Adam,

    Here's the youtube link

    https://www.youtube.com/watch?v=A5sjyEGFOhE

    and here on PL which is maybe where it came up originally

    http://www.photonlexicon.com/forums/...Spatial-Filter

    Cheers,

    Mark.

  3. #3
    Join Date
    Oct 2010
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    Default

    is this it? http://www.photonlexicon.com/forums/...ybe-ALL)-Beams
    The youtube link is #40, page 2 https://www.youtube.com/watch?v=_POfjxeAEvU


    and here is my own take, for illustration purposes, using a 400um apperture and a 1:1 telescope http://www.photonlexicon.com/forums/...9&d=1342125279 (no beam measurements, I was just trying to take a pretty picture)
    "its called character briggs..."

  4. #4
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    Default

    and here is my own take, for illustration purposes, using a 400um apperture and a 1:1 telescope http://www.photonlexicon.com/forums/...9&d=1342125279 (no beam measurements, I was just trying to take a pretty picture)

    What flavor bubble gum do you recommend to hold the spatial filter?

  5. #5
    Join Date
    Oct 2010
    Location
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    Default

    Heh!! This is just some sort of sticky putty and it tastes a bit meh... I call it "rapid prototyping holding-together agent" and it allows fine 3 axis adjustments However, repeatability is an issue.

    Joking aside, I have found the sweetening additives in chewing gum to cause increased divergence in beam propagation when used to hold spatial filters in place.
    "its called character briggs..."

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