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"Magic Sabre" 2W High Wavelength 454nm Blue

rhd

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The "Magic Sabre" 2W High-Wavelength 454nm Build

attachment.php


This is the latest "Sabre" build I've tackled. It follows in the footsteps of the twin sabres built several months ago here, and adds something new: polarity-free "Magic". This build is completely polarity-agnostic. As long as both cells point in the same direction, you can insert them however you want, and the driver will make it work!

The diode was intentionally binned for high-wavelength, and at 454nm on the spectrometer, it's a beautiful blue. I'll echo what I said in the earlier thread. Our eyes are much more sensitive to light in the higher blue wavelengths, and it's amazing how much brightness the high wavelength adds here. In addition to the brightness benefit, you can definitely tell the difference in colour vs a diode that is hitting closer to 445nm.

This build runs on 2x 26650 cells. You can also use adapters (which I'll provide if you'd like, just remind me) for 18650s instead. It is a remarkably stable build. In the attached LPM chart, you'll see that it held within 10% of it's 2W rating, for the full 5 minute run time.

I only ship via fully tracked and insured methods. Please PM me for a shipping quote.

You MUST own laser protection goggles appropriate for this wavelength, and
You MUST be over 20 years of age, and
You MUST be familiar and experienced with the appropriate safety precautions to take with lasers of this power.
You MUST NOT be a resident of Canada

This is not a laser pointing device. At all times, protective laser safety glasses appropriate for this wavelength must be worn by the operator. This laser should not be used around 3rd parties (non-operators) pets, or for any recreational purpose.
 

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ped

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Beam looks white :confused:
 
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sinner

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Is that a white beam :drool: i like the black focus adapter too , looks like a moustache arround the nose! :p
Good luck with the sale :wave:

:beer:
 

rhd

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

The beam looks white to you guys?

I was actually thinking it looked too violet.

I'll go back to the raw file and see if I can lower the level of exposure. It might be clipping.

EDIT: Does this look more blue and less white? (while not being violet)

More accurate beamshot: http://laserpointerforums.com/attachment.php?attachmentid=39105&stc=1&d=1344064350
 
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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Awesome build! Great price too. Should sell very quick. :)

I think the beam's clipped too. Maybe if you have some time, get an HDR shot and tonemap it. :D

Cheers! :beer:
 

rhd

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Awesome build! Great price too. Should sell very quick. :)

I think the beam's clipped too. Maybe if you have some time, get an HDR shot and tonemap it. :D

Thanks!

Regarding the HDR, I'm not crazy about the idea of people using HDR shots to represent beams in FS threads. I feel like adjusting the white-balance of a RAW file is one thing, but creating an HDR from separate exposures is just a step too far towards the "artificial".
 
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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Thanks!

Regarding the HDR, I'm not crazy about the idea of people using HDR shots to represent beams in FS threads. I feel like adjusting the white-balance of a RAW file is one thing, but creating an HDR from separate exposures is just a step too far towards the "artificial".

True, I see your point, but I think the dynamic ranges of digital cameras are too narrow for beamshots. I haven't tried HDR for lasers yet, but I feel like it might capture how the human eye really sees it. :D

Again, good luck on your sale! :beer:
 

ped

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Still looks no where near blue and more white to me? .

Tried on two different monitors in case there was a colour temperature difference, but even on this one it looks white, with a hint of blue :confused:
 

rhd

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Still looks no where near blue and more white to me? .

Tried on two different monitors in case there was a colour temperature difference, but even on this one it looks white, with a hint of blue :confused:

Did you F5 refresh the page?
 

ped

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

I did...

Taken this from your Laser Relic..

Now it becomes immediately obvious that there is more than a 9nm difference here..

j9caol.jpg
 
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rhd

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

I'll take a look in the morning then and see what the jpegs that were shot along side the raw files look like. Right now the updated photo is looking blue for me, but maybe it would be better for me to just skip white balancing the raw files entirely, and just use the jpegs.
 

ped

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Did you see the pic I posted above.. can you see the difference?
 

rhd

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Did you see the pic I posted above.. can you see the difference?

Oh, I see that now. Okay so it's really the center of the beam that looks white then, not the edges?

I think that's just a function of exposure time, not color balancing. The edges still look an appropriate shade of blue though, right?

To get the center of the beam back into the color range, instead of blown out, I think I'd just need to take new photos.
 

ped

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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Yep its mainly the "inner" beam shot that looks white.
 
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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

How about the duty cycle?
 
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Re: FS: "Magic Sabre" 2W High Wavelength 454nm Blue

Holy hell!

Hey next time you come across one of 450+nm gems, message me?

@ ginhev, I made the heatsinks for Sabre hosts, and duty cycle is far from an issue. I have my 445nm running at 1.7 Amps in it, it can run for maybe even minute and a half before the head of the host becomes alarmingly warm. There's excellent thermal conductance between diode and outside surface of the host to dissipate heat into environment.

Kudos to RHD for designing the 'sink!
 




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