Results 1 to 10 of 10

Thread: Measuring Laser Output Watts...

  1. #1
    Join Date
    Apr 2007
    Posts
    3

    Default Measuring Laser Output Watts...

    I have a LaserWorld RS-800RGY. I must say I have had a lot of fun with it. But recently was looking at upgrading it to RGB. Opened the top to find 2 Red diodes both say 200mw going into a cube. Anyhow after reading a lot of posts about underpowered LaserWorld products, thought I should measure the ones I have. So I bought a LaserBee.

    My real question is how to make these go to full power so I can measure them atleast somewhat accurately. I have Pangolin FB3, and I have used 3D Draw to make a point in each color Green & Red, and created the max points 300+ to hopefully drive the diode on each color to measure it, is this the maximum power? As each red is measuring around 75mw not through optics, and the green is measuring around 130mw through optics.

    Any help would be much appreciated as I am wanting to upgrade...

    Thanks,

    Michael

  2. #2
    Join Date
    Mar 2010
    Location
    Phoenix,Az
    Posts
    285

    Default What I did

    I took my modules out and hooked them up to a driver board that was not part of the projector (adjusting the driver for the diode curent and voltage required for each type) and power metered them that way. I could'nt rely on the the projectors electronics for a acurate reading, so that was a method that I knew was solid.
    BEAMANN (GODSLIGHT SHOWS)

  3. #3
    Join Date
    Feb 2008
    Location
    East Sussex, England
    Posts
    5,204

    Default

    You need to hook the drivers up to a known constant 5v supply to drive them to max. Running off the FB3 will not do it as it modulates the blanking, even when on full.

  4. #4
    Join Date
    Apr 2007
    Posts
    3

    Default

    Quote Originally Posted by norty303 View Post
    You need to hook the drivers up to a known constant 5v supply to drive them to max. Running off the FB3 will not do it as it modulates the blanking, even when on full.
    Drivers.... what is this exactly? Do you mean to put a constant 5 volts to the TTL connection on the laser diode? Is the TTL connection what determines the intensity of the laser? Thanks for the help.

  5. #5
    Join Date
    Mar 2009
    Location
    New Orleans, LA USA
    Posts
    399

    Default

    Quote Originally Posted by miking1834 View Post
    Drivers.... what is this exactly? Do you mean to put a constant 5 volts to the TTL connection on the laser diode? Is the TTL connection what determines the intensity of the laser? Thanks for the help.
    Yeah, Just put 5v on your ttl line to get full power but remember that TTL doesn't determine the "intensity" as you call it, rather ttl is just ON or OFF......Nothing in between.
    10W RGB
    2x 5W RGB
    2x 3W RGB
    2x 1W Green
    ---------------------------------
    QM.NET, 2x FB3, LivePro, Beyond, APC40,
    http://www.laserist.org/ImageFiles/I...MEMBER_75w.gif
    kgblasers.com

  6. #6
    Join Date
    Feb 2008
    Location
    East Sussex, England
    Posts
    5,204

    Default

    Sorry, missed that it was TTL. You should be fine with any supply that is constant that gets you over threshold value. A couple of volts should do it.

  7. #7
    Join Date
    Jan 2007
    Location
    Yorkshire, UK
    Posts
    4,581

    Default

    Be very wary of back reflections into the diodes if you're testing them on full power. A small amount of light that gets reflected back into the diode can easily kill them if they're being pushed to the max. To avoid this use the sensor at a slight angle so the reflected beam is kept well away.
    Quote: "There is a theory which states that if ever, for any reason, anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.... Douglas Adams 1952 - 2001

  8. #8
    Join Date
    Mar 2010
    Location
    Phoenix,Az
    Posts
    285

    Default GTK

    Quote Originally Posted by Jem View Post
    Be very wary of back reflections into the diodes if you're testing them on full power. A small amount of light that gets reflected back into the diode can easily kill them if they're being pushed to the max. To avoid this use the sensor at a slight angle so the reflected beam is kept well away.
    @ jem
    Thanks for that tip, Good To Know!
    BEAMANN (GODSLIGHT SHOWS)

  9. #9
    Join Date
    Nov 2009
    Location
    Maryland
    Posts
    320

    Default

    RS-800 is an analog fixture so you will need to use the full 5V to drive it properly. When it is all said and done you should get about 150 out of each red and maybe 250 out of the green.

  10. #10
    Join Date
    Nov 2007
    Location
    Cairns, Australia
    Posts
    1,896

    Default

    Apply +5V on pins 5, 6 and 7 of the ILDA input, that should turn all your lasers up to full power

Posting Permissions

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