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Old 03-13-2012, 01:20 PM #1
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Default 447nm or 405nm?

Hi all, i can't decide if i should buy a 473nm or 589nm, so i will build a rgb one ^^.
But now i have another problem. Should I use 405nm or 447nm for blue? I really miss my 405nm so i prefer to buy this. It is cheaper too and has an nice fluorescent effect. But is it possible to mix real white with it?


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Old 03-13-2012, 01:59 PM #2
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Default Re: 447nm or 405nm?

With 405 nm you don't get a real white, only the dot will apear white ----------------------------( depens on the surface )

Use 445 nm for the blue
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Old 03-14-2012, 12:55 AM #3
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Default Re: 447nm or 405nm?

473 is expensive VERY EXPENSIVE for each power unit that you need simply because in IR conversion only about 3-5% of the IR light is turned into blue. so yea 445 is cheap and produces a pretty cool RGB effect
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Old 03-14-2012, 01:00 AM #4
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Default Re: 447nm or 405nm?

Quote:
Originally Posted by mattco2 View Post
473 is expensive VERY EXPENSIVE for each power unit that you need simply because in IR conversion only about 3-5% of the IR light is turned into blue. so yea 445 is cheap and produces a pretty cool RGB effect
The goal is to come close to the color of 473 with an RGB unit, so whether to use 405 or 445 to get a closer match

As with the 445 vs 405, I'd also say 445 to get a better white, you'll still have a yellowish color, and you'll get something like a cyan from green and blue.
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Old 03-14-2012, 01:06 AM #5
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Default Re: 447nm or 405nm?

Quote:
Originally Posted by bloompyle View Post
The goal is to come close to the color of 473 with an RGB unit, so whether to use 405 or 445 to get a closer match

As with the 445 vs 405, I'd also say 445 to get a better white, you'll still have a yellowish color, and you'll get something like a cyan from green and blue.
true dat but if its a yellow problem could the powers not be fine tuned to get rid of some that tint
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Old 03-14-2012, 02:07 AM #6
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Default Re: 447nm or 405nm?

I'd get the 445nm, I don't see the 405nm so well.

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Old 03-14-2012, 03:22 AM #7
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Default Re: 447nm or 405nm?

well 405 in in the near UV area so i can ''see" were your coming from
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Old 03-14-2012, 03:43 AM #8
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Default Re: 447nm or 405nm?

I'd go with 445 (447nm), but without a fat (>10mm) green you are still going to have a pink halo around your white.
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Old 03-14-2012, 05:14 AM #9
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Default Re: 447nm or 405nm?

Quote:
Originally Posted by Ash View Post
I'd go with 445 (447nm), but without a fat (>10mm) green you are still going to have a pink halo around your white.
That being said, you could avoid this by spending another ~$150 on 2 single mode 445's at ~100mW and a PBS cube. Or just one diode for $59 from DTR.
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457nm Tunable OMNI 532
465nm Tunable OMNI 532
467nm 1.8W NDB7675
472nm Tunable Omni 532
473nm 2x 100mW Melles Griot lab heads w/ PSUs
476nm Tunable OMNI 532
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496nm Tunable OMNI 532
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532nm Various pointers
543nm GreeNe 2mW
568nm ~20mW ArKr whitelight line
589nm 126mW PGL-III-C
594nm Rigel-6; 4.75mW + <1mW
604nm 2x <1mW multiline
609nm Ne Penning mixture Ar line from REO 612nm
612nm HeNe 1mW ML 4 line; Raman 6 line
629nm <1mW Raman 6 line
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635nm Raman 6 line
638nm 20mW single mode
640nm Raman 6 line
647nm ~10mW ArKr whitelight Kr line
650nm Raman 6 line
658nm LPC-826
685nm 20mW
808nm Modded NewWish pen


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Old 03-14-2012, 08:47 AM #10
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Default Re: 447nm or 405nm?

Yes, you can always mix white, but your eyes are less sensitive to some wavelengths like 405nm than, say, 532nm, so you'll need more to mix with. It would be easier for you to use 445nm, and it'll probably allow you to get closer to 473nm than with 405nm, even with any amount of power.

As for dot-size, it'll also depend on the distance, as those 532nm lasers have quite a bit of divergence even if the beam is thin up close. The spot shape may be different though, especially with 445nm being a bar-shape instead of a spot.
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