Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

447nm or 405nm?

MrMcChicken

MrMcChicken

0
Joined
Mar 6, 2011
Messages
279
Points
28
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?
 





weeba2kv

weeba2kv

0
Joined
Sep 24, 2010
Messages
1,364
Points
0
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
 
M

mattco2

0
Joined
Feb 12, 2012
Messages
237
Points
0
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
 
bloompyle

bloompyle

2
Joined
Apr 26, 2010
Messages
4,175
Points
83
mattco2 said:
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
Click to expand...

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.
 
M

mattco2

0
Joined
Feb 12, 2012
Messages
237
Points
0
bloompyle said:
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.
Click to expand...
true dat but if its a yellow problem could the powers not be fine tuned to get rid of some that tint
 
Ash

Ash

0
Joined
Mar 3, 2009
Messages
1,981
Points
0
I'd go with 445 (447nm), but without a fat (>10mm) green you are still going to have a pink halo around your white.
 
bloompyle

bloompyle

2
Joined
Apr 26, 2010
Messages
4,175
Points
83
Ash said:
I'd go with 445 (447nm), but without a fat (>10mm) green you are still going to have a pink halo around your white.
Click to expand...

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.
 
Bionic-Badger

Bionic-Badger

0
Joined
Oct 26, 2007
Messages
5,438
Points
83
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.
 
You must log in or register to reply here.




Top