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Thread: Down and Dirty Dually

  1. #11
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    Quote Originally Posted by allthatwhichis View Post
    I know this will disappoint you.
    Yeah. I guess you remember how much I don't like beamshows, Aaron . hehe .


  2. #12
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    .. OK, .. to be continued .. (this will eventually be an RGB, the 636 300mw is already done)(I'll post pics of it later .. thanks for tuning in

    -edit-
    Here is the Kvant 445 at 50 feet.
    Hm? didnt see it..

    OK- I see it now!!!!!!
    Last edited by steve-o; 04-13-2011 at 11:55.

  3. #13
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    Smile

    The red 636:
    Click image for larger version. 

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    Last edited by steve-o; 04-13-2011 at 17:32.

  4. #14
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    Lightbulb

    Quote Originally Posted by steve-o View Post
    ...I too was looking at those pointer type greenie oem modules. Thinking of putting 4 of 'em (knife-edging+pbs /something) @ 150mW ea to make 600mW of green to match the great higher 445 blue power that is now available to us (in a compact size). .
    I think you'll be happy with 300mW of green to go with what you have already. I'd get a bradband cube and start with two of the OEM modules.

  5. #15
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    Quote Originally Posted by allthatwhichis View Post
    I think you'll be happy with 300mW of green to go with what you have already. I'd get a bradband cube and start with two of the OEM modules.
    Sounds good. I'm planning on dual 1 watt blues for 2 watts total of 445. You think 0.3W of green will be enough? (Where'd I put that brightness chart..)
    Do you know what kind of modules these are? I've seen similar ones on the O-like site,
    but like most pointers, they have a required cycle time (e.g. 100 seconds on, 60 seconds off) due to lack of tec, improper heatsinking etc. I'm wondering if external additional heatsinking will do the trick.

  6. #16
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    Exclamation

    OK- I found the chart (over at Sam's place.)
    Click image for larger version. 

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    (I know there's a bunch of these around here already, but it's always good to have a few spares hanging around :]

    According to this (if it's not outdated) 532nm is 22 times brighter to the human eye than 445, which means with 2 watts of 445, only ~90mw of 532 is needed for correct balance. right?

  7. #17
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    Without looking for the chart I recall that 532 is 4-5 times as bright as 445. But, remember perceived brightness is effected by the intensity of the light and the higher beam quality of the 532 will increase this ratio further.

  8. #18
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    Log in and you will be able to see the chart that I posted.

  9. #19
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    Wink

    Steve, my Kvant 1W has a 300mW green with a 1 watt 445 and 300mW of 640 and it is a bit green heavy sometimes. I am also building a 1.2W with 500mW 445, 300mW 532, and a mix of 150mW 640 and 300mW 660 which also looks a bit green heavy. 600mW of green will go nicely with 2 watts of blue but you may need to throw together a dual 660 rig also.

  10. #20
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    I saw your chart, but, I'd take issue with the very high ratio. Refering to published curves for photopic and scotopic sensitivity it looks like the chart you posted agrees with the photopic (bright ambient light) curve while the scotopic curve (dark adapted) supports a lower 4:1 ratio. Looking at my 100mw 532 laser pointer next to my 1.5W 445 lab laser in a dark room it in no way is as bright, but by reducing the 445 to 700mw they are very close. Just to stir things up a bit why not purchase the most powerful laser within each wavelength and balance them with software for now. Whenever you want the most punch max them out at the expense of balance and as money/lasers become available then upgrade whichever laser is the week link in the future?

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