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Thread: Red: The new Blue

  1. #11
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    What sort of size rooms are you using this in?
    I'm taking my smaller projectors to a job tomorrow in a room that holds about 300 or so people.
    The red is enough for that space, with an even but not heavy haze.
    So I wonder why your 500mW red isn't cutting it (in your perception)?
    Is there a lot of ambient light?

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    You're kidding. It's like 3 times as expensive. Buying off the shelf anyway.
    I had some custom modules made, combined red/blue, single diode of each, with prisms and correction optics, and I can tell you that they were not much more per module than buying a 1W 532 OEM-VS

    That said, I also spent nearly £2k on a 1W 638nm Kvant 6 diode array module when they were brand new. Lovely, but for the effect, you don't see that it's so many times more pricey.
    Last edited by norty303; 01-10-2014 at 08:13.
    Frikkin Lasers
    http://www.frikkinlasers.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

  2. #12
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    it WILL be gone by then

    but pop round either way if you want me to take a look at ya projector
    Eat Sleep Lase Repeat

  3. #13
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    Click image for larger version. 

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ID:	41772 Here's a shot from the DJ booth.
    I know I know, crowed scanning. It was only for the publicity shots. And most of the light is coming from the camera flash.
    By 11 o'clock all the lights are off apart form a few floor LEDs that spread on the ground in front of them.
    It holds over a thousand.

  4. #14
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    It holds over a thousand
    This is your problem. The laser is simply not big enough for the job.
    I've attempted to do rooms that size with my smaller projectors but the red were nearly invisible and I had to stick to white, greens and high impact colours, and ensure it was well hazed.
    700mW+ of well corrected 637 will work for you I'd have thought, but not a poorly corrected cheap module. Beam quality counts for a lot in these circumstances (not withstanding the wings on the 637 modules these days)
    Frikkin Lasers
    http://www.frikkinlasers.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

  5. #15
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    Norty your pics look awesome.
    Nice bright beams and great decor ;-)
    I have to remember that I'm not inside but outside.
    All the clubs out here, even the big ones...especially the big ones are all outside. But I fog the place up with smoke machines and there is tones of dust and crap in the air coming from the sea and the dusty roads (and the weed pipes;-)

  6. #16
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    Oh god, if you're outdoors too then you're really up against it.
    On a limited budget you'd be better off forgetting about red and hitting it with a few bigger (1.2W+) green only projectors.
    But if you were asking me to spec a projector for that space outdoors I'd be looking at 900mW+ of 637 (well corrected, did I say that already? ), 1.2W+ 532 and 1.5W+ 445
    But that will still require good control of the atmosphere.

    Some people might say that my spec is far too small, and you need 10W+ for that outdoors, but I've been there and done the job, covering that sort of space, with that size projector and had it looking good.
    Frikkin Lasers
    http://www.frikkinlasers.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

  7. #17
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    Well yeah Norty I think it's totally doable with those kinda numbers. Doing ok so far. It's just the red. But I wouldn't want to do one with just green either.
    The red just doesnt stand up. It's got to be more powerful. Also can;t wait to get home to test the power. Andy I'd be well up for coming round for you to look at it.

    - - - Updated - - -

    So what do people think of using 635? Divergence issues at 40 meters? Is it really 3 times brighter?

    Graham

  8. #18
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    Is it really 3 times brighter?
    Than what?

    You need a short wavelength with high power density. Everything I've seen about 635 suggests they fail on the power density because they're a bigger beam to begin with.

    My 350mW 640 modules perform the same to the eye as an 1100mW 650, but thats partly (aside from the wavelength benefits) to do with the fact they're a nice tight pair of single mode diodes through a cube, rather than a big fat square 5mm beam.

    What 635 can you get for your money, because this seems to be the thrust of your question?
    Frikkin Lasers
    http://www.frikkinlasers.co.uk

    You are using Bonetti's defense against me, ah?

    I thought it fitting, considering the rocky terrain.

  9. #19
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    I'd like to get 2 Watts of 635 as well as 2W G and 3W Blue

  10. #20
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    But I'm just worried about the divergence for graphics, whih might take up 10-20 % of things I do.
    But you just mentioned density. Yeah so bigger beam - less bright.
    Can't we make the beam thinner with less divergence with optics? Has anyone done this? You have to forgive my naive questioning.

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