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Thread: Mix 532nm with 660nm for psuedo 640nm?

  1. #1
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    Default Mix 532nm with 660nm for psuedo 640nm?

    I have been looking at colour mixing, to my mind you could mix a few % 532 with 660 for a brighter red.

    Has anyone tried this? Am I barking up the wrong tree?
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  2. #2
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    Adding a TINY bit of 532 does make the beam more orange, but you'll have fun trying to make a DPSS green modulate consistently, reliably and at a repeatable level just above threshold.
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  3. #3
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    someone correct me if I am wrong but i don't think you can gain brightness by adding different wavelengths.

  4. #4
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    Default colour

    they are on about percieved colour not brightness
    but a small amount brightness does come with mixing
    works fine with bluray why not red
    but if your lasers can cope with the mixing is a different question
    When God said “Let there be light” he surely must have meant perfectly coherent light.

  5. #5
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    I don't think its possible to make any hue of red brighter than the original 660nm by adding any amount of green. I think adding enough green to change the perceived brightness would put you in the orange or yellow range.

  6. #6
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    Considering you need about 4 mW of 532 nm for every watt of 660 nm to get pseudo-640, the gain in brightness will be marginal. The luminance will be increased by around 5%, but the increase in apparent brightness should be less than that. Partly due to a negative deviation encountered when mixing colors on the red-green line.

    No, I'm afraid the real 640 nm light is far superior, with about 3 times the luminance of 660 nm.

  7. #7
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    Quote Originally Posted by tocket View Post
    Considering you need about 4 mW of 532 nm for every watt of 660 nm to get pseudo-640, the gain in brightness will be marginal. The luminance will be increased by around 5%, but the increase in apparent brightness should be less than that. Partly due to a negative deviation encountered when mixing colors on the red-green line.

    No, I'm afraid the real 640 nm light is far superior, with about 3 times the luminance of 660 nm.
    My original thought was to use a small OEM type module (10-50mW say) for this purpose and Dychro combine R+G. This would be more controllable than using your main G.

    Thanks Tocket, smacked in the head with the reality stick!
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  8. #8
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    or you could just mix it with 640nm instead
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  9. #9
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    Quote Originally Posted by aijii View Post
    or you could just mix it with 640nm instead
    .
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  10. #10
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    Quote Originally Posted by aijii View Post
    or you could just mix it with 640nm instead
    1mw 660nm to 600mw 640nm

    Think of the saving!

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