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Thread: Blue monster project

  1. #31
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    Quote Originally Posted by danielbriggs View Post
    Andy is spot on.

    Assuming same divergence, if you have a 30W with 8mm circular beam, or 4W with a 1mm circular beam.
    I know what I'd rather have! (No, not the 30W)

    ...power density...
    Lol, Give me both and i will have a 34Watter with 9mm Beam.

    J/K

    The beam is ofc of importance but for me that mostly do beamshows with beammirrors etc. i prefer more power, although i do graphics also so the beam cant be to wide or bad.. But a 5-10cm wide beam at 50meters is ok if its over 2Watt.

  2. #32
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    Quote Originally Posted by aijii View Post
    on one hand, everyone here wants safe audience scanning.

    on the other, its super tight beams.

    make up your mind ?
    Audience scanning with 3W @ >5mrad (warning extreme overloaded audio).

    http://www.youtube.com/watch?v=RkYErDPStkU
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  3. #33
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    it seems to me that with these diodes, we can kinda "have our cake and eat it too."

    Like (i think) Dave said, not too many people are going to want to or need to do graphics with >20W or >30W of laser light. 20-30W is orgasmic though for some outdoor beam stuff. And for that, who cares about beam quality?

    for graphics, i think 2-4W of blue 445 is about the most needed to project in almost any environemt on almost any surface. and the 2-4W blues seem to be getting some really good beam qualities. You gotta think, with that power, chances are you got at least a watt or so of green and red also. so youre talking about a minimum of 6 watts for scanning graphics. I think that is more than enough for almost any application i can think of. Except for maybe sky writing.

    Heroic-

    that 7W looks great. rough specs? (spot size @ distance?). how are they on scanner mirrors?

    -Marc
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  4. #34
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    Quote Originally Posted by Doc View Post
    Audience scanning with 3W @ >5mrad (warning extreme overloaded audio).

    http://www.youtube.com/watch?v=RkYErDPStkU
    That looked... I mean, that sounded very unsafe... You weren't controlling the volume wre you.

  5. #35
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    Quote Originally Posted by gottaluvlasers View Post
    that 7W looks great. rough specs? (spot size @ distance?). how are they on scanner mirrors?

    -Marc
    I took a bigger beam in exchange for lower divergence; I get 1.5cm spot @ 10m. The downside is that I have to use 8mm aperture scanners. Etendue, etc.

  6. #36
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    Quote Originally Posted by heroic View Post
    I took a bigger beam in exchange for lower divergence; I get 1.5cm spot @ 10m. The downside is that I have to use 8mm aperture scanners. Etendue, etc.
    etendue to you too!
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  7. #37
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    Quote Originally Posted by heroic View Post
    I took a bigger beam in exchange for lower divergence; I get 1.5cm spot @ 10m. The downside is that I have to use 8mm aperture scanners. Etendue, etc.
    What lenses are you using to get less than 1mrad out of each diode?
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  8. #38
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    Quote Originally Posted by gottaluvlasers View Post
    it seems to me that with these diodes, we can kinda "have our cake and eat it too."

    Like (i think) Dave said, not too many people are going to want to or need to do graphics with >20W or >30W of laser light. 20-30W is orgasmic though for some outdoor beam stuff. And for that, who cares about beam quality?

    for graphics, i think 2-4W of blue 445 is about the most needed to project in almost any environemt on almost any surface. and the 2-4W blues seem to be getting some really good beam qualities. You gotta think, with that power, chances are you got at least a watt or so of green and red also. so youre talking about a minimum of 6 watts for scanning graphics. I think that is more than enough for almost any application i can think of. Except for maybe sky writing.
    I agree, I think for graphics, 3W total output is a decent amount unless your projecting outdoors, then maybe 6~10W depending on venue size... and even then the larger you project chances are people are further away lessening the issue of beam shape...

    for beam shows, I really dont think beam quality/shape is going to be noticeable enough to sweat over it that much

    30W blue... oh man, that would be a pretty mean mix with a laserscope... now where do I get 30W of red? 120 DVD-RW diodes? LOL

  9. #39
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    Quote Originally Posted by dave View Post
    What lenses are you using to get less than 1mrad out of each diode?
    I am getting 1.5 mrad. it doesn't work "each diode" because the beams overlap as they spread out; they are aimed at a coincident point.

  10. #40
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    Quote Originally Posted by heroic View Post
    I am getting 1.5 mrad. it doesn't work "each diode" because the beams overlap as they spread out; they are aimed at a coincident point.
    Yes, I realise that the beams are overlapped.

    1.5mrad will work out to more than 15mm at 10m if I'm not mistaken
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