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Thread: 575nm lasers.

  1. #1
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    Default 575nm lasers.

    They are really here. Got one. 30mw. So bright you can see the dot at 300 feet in sunshine. The beam is tighter than the green dpss. Have not tried modulation yet. The drivers supplied are junk.

  2. #2
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    .
    - There is no such word as "can't" -
    - 60% of the time it works every time -

  3. #3
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    Photos.......................................
    Click image for larger version. 

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    the driver is in the top of the picture above - driving a 2 volt diode with 12 volts isn't a great idea in general, and certainly not with this driver...

    Click image for larger version. 

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    Click image for larger version. 

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    It looks green due to camera optics. It's running at current limited @ 1.5A 2V. The supplied driver is a toy.
    Last edited by laserist; 05-29-2018 at 12:25.
    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  4. #4
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    Default

    Looking forward to seeing these. However, I'm unfortunately just getting an 'Invalid attachment' message when I click on the links.
    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

  5. #5
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    Quote Originally Posted by Jem View Post
    Looking forward to seeing these. However, I'm unfortunately just getting an 'Invalid attachment' message when I click on the links.
    Same here. Can't see the attachments.

    As far as the drivers go, are they a simple diode driver or do they have any TEC functions?

  6. #6
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    Quote Originally Posted by absolom7691 View Post
    As far as the drivers go, are they a simple diode driver or do they have any TEC functions?
    The modules are just very compact un(thermally)-regulated DPSS.
    No active temperature compensation of the pump or x-tal.

    I'm amazed it works so well
    - There is no such word as "can't" -
    - 60% of the time it works every time -

  7. #7
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    The images should be visible now... at least they display for me...

    The power goes down about 30% when you move the power sensor from right in front of the laser to about a foot away from the module even though the entire beam is still on the sensor. I assume that's due to an superimposed out of focus Infrared component.
    "There are painters who transform the sun into a yellow spot, but there are others who, with the help of their art and their intelligence, transform a yellow spot into the sun." Pablo Picasso

  8. #8
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    Quote Originally Posted by laserist View Post
    The images should be visible now... at least they display for me...

    The power goes down about 30% when you move the power sensor from right in front of the laser to about a foot away from the module even though the entire beam is still on the sensor. I assume that's due to an superimposed out of focus Infrared component.
    Yep, showing up for me. Thanks for posting pics!

    I was wondering how well the IR was filtered, if at all.

    Since the camera sensor is having trouble with the wavelength, to your eye, what would you compare the yellow to?

  9. #9
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    highlighter yellow. lemon yellow. it's very yellow. the 565nm is more lime. Next to 532 it looks yellow and the 575 looks a touch orange. It's all dependent on the other things around it. In fact much more so than other wavelengths.

    They found an actual orange line in the yellow on LPF.

  10. #10
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    Nice. I think I am going to get one. I guess the next hurdle is dichros

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