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Old 08-24-2010, 02:44 PM #17
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Default Re: 445nm vs 532nm brightness comparison.

When I look directly at the pic I would say 532nm, but when Im staring on another item near my notebook, without focusing your laser-pic, I notice 445nm much more.


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405nm >> Wickedlasers SONAR by lazeerer peak@968mW
445nm >> Kryton Smooth by lazeerer peak@2075mW
453nm >> Lipstick by rhd peak@158mW
473nm >> Optotronics RPL-B peak@112mW
515nm >> Skylasers HL peak@41mW
532nm >> Novalasers Alpha HP peak@284mW
589nm >> CNI PGL-III-A peak@89mW
594nm >> Laserglow Rigel peak@4mW
635nm >> MXDL by DTR peak@38mW
642nm >> Saillaser peak@23mW
660nm >> CR2 by lazeerer peak@524mW
685nm >> MXDL by lazereer peak@42mW

Above lasers measured with an Ophir nospin LPM


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Old 08-24-2010, 10:40 PM #18
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Default Re: 445nm vs 532nm brightness comparison.

Here is a quick and dirty photoshop edit of a photo I took to illustrate the camera's version of reality... above is the unedited photo, below is the edited version depicting how the beam appears to my eyes:


The output powers are 250mW 445nm and 130mW 532nm.
Air is "clean."
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Old 08-25-2010, 12:21 AM #19
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Default Re: 445nm vs 532nm brightness comparison.

Quote:
Originally Posted by leukoplast View Post
Awesome, thanks ken! That is actually pretty close in terms of brightness. That is good to hear. I am attempting to build a 50-75mW 445 in a pen, and I was hoping it would still be pretty bright. Based on this, a 75mW 445 may be equivalent to a 40-50mW green. And a 50mW would be similar to a 30mW green. Which is actually still quite bright!
Except the sensitivity and colour balance of a CCD in a digital camera is not necessarily that of an eye. so comparing digital photos for the purpose of comparison to eye sensitivity is not accurate.
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3x Shinp 650/532nm/445nm 250+100+300mw Light show (modified to include the 445)

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Old 08-25-2010, 02:21 AM #20
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Default Re: 445nm vs 532nm brightness comparison.





Here are a few examples of my Spartan 447nm 1Watt Laser and my new Wicked Lasers Photonic Disrupter Pro 532nm 100mW Laser.

Here's a few extra: http://www.flickr.com/photos/timjdav...7624593888675/
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Old 08-25-2010, 05:29 AM #21
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Default Re: 445nm vs 532nm brightness comparison.

Simply amazing pics Spartan! And the second pic, I would have been worried sick that the lasers might fall!

And interesting how much thicker the 445 beam appears to be compared to the green.
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Old 08-27-2010, 09:39 AM #22
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Default Re: 445nm vs 532nm brightness comparison.

Quote:
Originally Posted by leukoplast View Post
...interesting how much thicker the 445 beam appears to be compared to the green.
In general*, the 445nm emits a "bar-shaped" beam. Thus taken at different angles, the 445nm beam is likely to appear differently (different thicknesses).



*It's been said the Arctic uses lenses to "crop" the output to a more pleasant dot-like shape but with my 405-G-1 based laser, it is without a doubt a bar...
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Old 08-27-2010, 10:08 AM #23
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Default Re: 445nm vs 532nm brightness comparison.

Quote:
Originally Posted by Spartan X View Post
Here are a few examples of my Spartan 447nm 1Watt Laser and my new Wicked Lasers Photonic Disrupter Pro 532nm 100mW Laser.
Is it the white balance on your camera that makes it look like magenta rather than blue?
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Old 10-26-2010, 07:15 PM #24
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Default Re: 445nm vs 532nm brightness comparison.

Can a 445 diode be made to produce 2 watts pulsed for 2-3 seconds safely without burning up?
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Old 10-27-2010, 04:21 PM #25
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Default Re: 445nm vs 532nm brightness comparison.

Quote:
Originally Posted by zxn474l View Post
Can a 445 diode be made to produce 2 watts pulsed for 2-3 seconds safely without burning up?
Probably yes because DTR's Frankenstein is running at 2W CW and he can run it for a pretty long time without it even getting too warm.

EDIT: 2W 445 DTR Frankenstein Ultrafire RL-2088 Handheld Host
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Old 10-28-2010, 02:17 PM #26
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Default Re: 445nm vs 532nm brightness comparison.

Except he rounds up from 1800mW or so, and a few people (Hemlock Mike?) have had their diodes die at 1.8A.
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