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Green laser

Discussion in 'LEDs and Optoelectronics' started by colum, Sep 15, 2018.

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  1. colum

    colum

    97
    3
    Jul 25, 2013
    Thank you for reading this
    I want to get a Green Laser with an IR filter also if possible to get a focusable unit all built in
    I am reactivating a Lab heavy duty chain driven pointing device and have all the motors wired up and intend to use it as a type of light emitting device to a dartboard or other target.
    I wonder if someone would advise me on getting the smallest light dot and if a focusable Laser would take care of that. The distance to the target would depend on the smoothness of the geared 12v motors (I think)
    I appreciate any advice....colum

    I know these Lasers can be dangerous
     
  2. Nanren888

    Nanren888

    227
    43
    Nov 8, 2015
    Sorry, I am missing what you are trying to do.
    For a visual indication a laser pointer might do? they seem to have reasonably small, collimated, dots. Why green?
     
  3. kellys_eye

    kellys_eye

    4,276
    1,146
    Jun 25, 2010
    The more function you want from a laser the more you have to pay.

    As per @Nanren888 most cheap 'pen type' lasers already available have spot diameters in the millimeter range and would suffice for aiming at a dartboard with no problems at all.

    Your ability to aim it will depend on the range as the accuracy of pointing increases as the range does - you'd be looking at micro-stepping (stepper motors) to get such accuracy. A 'chain driven' mechanism sounds like its far too coarse..... but pictures would help to make that determination.
     
  4. colum

    colum

    97
    3
    Jul 25, 2013
    Why Green? I heard that Green is more visible and smaller dot size at longer distance and its now less dangerous with a IR filter and I agree that a DC motor driven chain pointer seems inaccurate but that will be part of the challenge so I will adjust the target size and rely on a time element for difficulty
    This pointer had a large ink marker at the tip and alot of positioning LEDs and switches so it may be smooth enough
    I appreciate any advice on getting a Green Laser with built in IR filter for safety the focusing may not be necessary
    Thanks....colum
     
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