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Old 03-15-2012, 08:05 AM #1
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Default Not FS: 638nm 1000mW (1W) + Build, Stainless Steel

Stainless Steel - 638nm 1,000mW+ (1W+)




Forget the usual creative naming conventions, this guy's power speaks for itself. I've had him built for a bit over a month, and I've toyed with whether I wanted to part with it. It is my favorite red, and by far, the most powerful I own, at over 1W of output. I discussed the build a little bit here, about 4 pages into someone else's thread: "First Look" at The 500mW Mitsubishi ML501P73 635nm/638nm diode is in.! But I've never posted about him on his own. For perspective, 1W of 638nm should have a beam with roughly 10x the brightness of a 300mW LOC 658nm diode. Or put another way, this build should have the beam brightness of a 3.2W 658nm pointer.



To get 1,000mW+, it uses the ML501P73 instead of the typical 300mW Mitsubishi diodes that are generally used in builds around here. The diode costs about 3x as much as the typical 635s, but it also delivers almost 2x the power output. I've actually measured it peaking above 1.1W when it was fresh from a really cold start. Before XMas, I lucked into one diode purchase. The build also uses a G1 lens to push the power up and over that 1W mark. If interested in the 650-G-1 lens, take a look here: FS: 650-G-1 Glass Lens Modification! - Fit for AixiZ - 25% Increase for Red!



Finally, the host itself is perhaps one of my favorites. It's the stainless steel RL-118. It runs on a single 16340 cell. For anyone interested in building in one of these hosts, Jayrob sells this particular host as a kit: FS: Stainless Steel RL-118 Kit!. You should check out his thread for inspiration. I know that he sells a number of configuration options that would be great for 445s, etc. Though you probably can't find another ML501P73 diode right now, his kits should work great for the traditional 300mW Mitsubishi diodes.

The common question I get asked about this diode is "what are the beam specs like?". The answer is pretty straight-forward. The specs are essentially identical to that of the lower powered Mitsubishi 300mW 635nm multimodes.





Price: $539 + shipping
Lowered: to $499 + shipped
- And if the G lens isn't important to you, I can take $50 off the purchase price and include a glass 3-element lens. You'll see a roughly 30% reduction in output power.

Only fully trackable and insured shipping will be used.

With this build, considering the difficulty of sourcing the diode at present and the fact that there is little if any data/testing on this diode to date, I won't provide any guarantee on the diode itself.

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.

This laser is meant to be used as a portable calibration laser light source for LPM (laser power meter) sensors and meter systems. In order to ensure the most reliable calibration for your system, it is prudent to use multiple calibration lasers, representing multiple wavelengths, as well as multiple output powers, spanning the range of an LPM sensor's working detection range.
Attached Thumbnails
Not FS: 638nm 1000mW (1W) + Build, Stainless Steel-lpm-sized.jpg   Not FS: 638nm 1000mW (1W) + Build, Stainless Steel-lpm.png   Not FS: 638nm 1000mW (1W) + Build, Stainless Steel-aa-beam-1.jpg   Not FS: 638nm 1000mW (1W) + Build, Stainless Steel-aa-beam-2.jpg   Not FS: 638nm 1000mW (1W) + Build, Stainless Steel-red.png  



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- Federal Aviation Administration - Laser Safety Initiative (link)
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Old 03-15-2012, 08:09 AM #2
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

Ooo high priced. Im guessing it'll sell to someone who likes visibility.
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Old 03-15-2012, 08:23 AM #3
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by zdarkazn View Post
Ooo high priced. Im guessing it'll sell to someone who likes visibility.
Yep, it's pricey, no doubt.

To put the price in context though, with this diode + lens + host, the build cost itself was over 3x the price of building say a 635 @ 500mW in a C3 host.
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Old 03-15-2012, 02:54 PM #4
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by zdarkazn View Post
Ooo high priced. Im guessing it'll sell to someone who likes visibility.
Quote:
Originally Posted by rhd View Post
Yep, it's pricey, no doubt.

To put the price in context though, with this diode + lens + host, the build cost itself was over 3x the price of building say a 635 @ 500mW in a C3 host.
It's not just the visibility.
I've never seen a hand-held red this powerful in such a small host.
The beam is probably almost four times as bright as my LOC considering the wavelength.
Your on the cutting edge rhd.
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O-Like Silver Chrome ~50mW
Mini 1x10440 pen ~90mW
Novalasers X100 Compact Portable ~100mW
Optotronics +150mW Premium Pen ~161mW
Optotronics +150mW Premium Pen ~166mW
CR2 Keychain 6x GGW (Jayrob/Dr.Lava) V.2 (IgorT) w/405G ~245mW
Kryton Groove S06J 12X (kmm5117) 3-Element ~575mW
Kryton Groove M-140 (Kenom/Flaminpyro) w/405G ~1.2W
Kryton Groove M-140 (kmm5117) G-2 ~2W
C6 M-140 (Daguin) custom focus ring (MrCrouse) w/AixiZ G ~1.5W
C6 M-140 (Jayrob) w/copper heatsink 405-g-2 ~1.5W
501B M-140 (Marcuspeh) purple w/black heatsink G9 w/brass ~2.3W
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501B w/copper heat sink (Blord) ~1W
MXDL LOC (Daguin/LDFW) 420mA ~300mW

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Old 03-15-2012, 03:02 PM #5
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

When I saw this I got very frustrated since I have already purchased a 500 mW red laser from you, but all that went away when I looked at the price and knew I made the right decision hehe.
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Old 03-15-2012, 03:57 PM #6
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

Guys it's a MINI 1Watt RED Laser!! Price is Really good for that Thing.
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Old 03-15-2012, 03:58 PM #7
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Default Re: FS: 635nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by Moebius View Post
It's not just the visibility.
I've never seen a hand-held red this powerful in such a small host.
The beam is probably almost four times as bright as my LOC considering the wavelength.
Your on the cutting edge rhd.
Oh gosh, I think a lot more than four times the visibility. On literal power alone (ignoring wavelength) 1,000mW is three times (3x) the power of a LOC. If you consider wavelength as well, 638 vs 658 (or whatever 638 becomes when pushed vs whatever 658 becomes when pushed) is a brightness perception difference of 3x to 4x itself.

So a more realistic figure would be somewhere around 10x the perceived brightness of a LOC.

It's almost a meaningless comparison when you start getting into the 10x brightness range. How can you even conceptualize what 10x brightness actually looks like, you know? It's tough. I think the best way to convey the experience is just to say that this is a really visible red beam in situations where you might not even perceive a LOC to have a beam at all.

EDIT: I ran a comparison, and added the graphic to the OP:


Essentially, this build has the brightness of ten (10x) LOCs.
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- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)


Last edited by rhd; 03-15-2012 at 06:38 PM.
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Old 03-15-2012, 07:05 PM #8
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Rhd, you have a spectrometer as far as I remember.

Can you please add the graph to your OP?

Thanks
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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 03-15-2012, 07:57 PM #9
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by DJNY View Post
Rhd, you have a spectrometer as far as I remember.

Can you please add the graph to your OP?

Thanks
Nope, I'm not calibrated to test red wavelengths.

My highest calibration point was 589, so testing the reds would be inaccurate.

What I CAN do, is a comparison testing between two reds, because it will show how their wavelengths compare visually (that needs no calibration, as it's essentially the same as shining a laser through a grating and looking at the dot positioning)

So if there's value to that, I could do a comparison scan vs a typical 300mW Mitsubishi diode.
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Last edited by rhd; 03-15-2012 at 07:58 PM.
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Old 03-15-2012, 08:10 PM #10
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

whats the recommended duty cycle for this little beast?
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Old 03-15-2012, 08:18 PM #11
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

If itīs not too much work for you, I would love to see a comparison shot next to the 300mW Mitsubishi driven at lower Amp.

Quote:
Originally Posted by rhd View Post
Nope, I'm not calibrated to test red wavelengths.

My highest calibration point was 589, so testing the reds would be inaccurate.

What I CAN do, is a comparison testing between two reds, because it will show how their wavelengths compare visually (that needs no calibration, as it's essentially the same as shining a laser through a grating and looking at the dot positioning)

So if there's value to that, I could do a comparison scan vs a typical 300mW Mitsubishi diode.
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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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Interested? >> Click onto the laser titles for more information
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Old 03-15-2012, 08:36 PM #12
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by blue bumblebee View Post
whats the recommended duty cycle for this little beast?
Based on the LPM results, this build appears to hold within 90% of its output power for 2 full minutes. I would probably suggest that as its duty cycle.

Despite the fact that this is one of the most powerful red builds out there, iit's still pretty good at dealing with heat. You can do some quick comparisons vs a 1W 445, and figure out how much heat is dissipated by the build itself in each case:

1W 445 (with a boost driver, assume 1A diode current, 1.5A cell current):
Waste Heat = (1.5A x 4V) - 1W = 5W

1W 635 (with the ULDO linear driver used in this build, 1.45A cell current):
Waste Heat = (1.45A x 4V) - 1W = 4.8W

In essence, it's almost identical in terms of waste heat. So all else being equal, this build should behave (from a thermal dissipation perspective) much like a 445 running at 1W of output, powered by a boost driver and the same 16340 cell.

Quote:
Originally Posted by DJNY View Post
If itīs not too much work for you, I would love to see a comparison shot next to the 300mW Mitsubishi driven at lower Amp.
When I get home, I'll do a comparison shot against a Mits 300 build doing ~450mW of output.

I'll actually be interested to see the results. I have no hypothesis either way. In fact, I'm surprised that I haven't tried this yet.
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- Federal Aviation Administration - Laser Safety Initiative (link)
- Info release from Laserglow - Default Canadian restrictions on portable lasers (link)
- The Necessity of Safety Goggles (link)

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Old 03-16-2012, 02:59 AM #13
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Very nice laser you have built there! Good luck selling
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Old 03-16-2012, 05:11 AM #14
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Woah... I was wondering when we'd see one of these for sale. Wasn't expecting it for a while longer.

What kind of heatskink is in there?

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Old 03-16-2012, 05:37 AM #15
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

Quote:
Originally Posted by InfinitusEquitas View Post
Woah... I was wondering when we'd see one of these for same. Wasn't expecting it for a while longer.

What kind of heatskink is in there?
Aluminum.

I've noticed an interesting phenomena - and that's that because 1W is so much higher than we're used to seeing in RED, a lot of people are really intrigued by the thermal characteristics of a build that powerful. An amusing inquiry given that we often think 1W of 445 is almost trivial to heatsink, yet the thermal dissipation issues are almost identical.

All things considered, it's a really stable build. The drain on your cell is only about 1.5A, so even a relatively average cell will do (though I tend to use IMRs in it).
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Old 03-16-2012, 06:00 AM #16
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Default Re: FS: 638nm 1000mW (1W) + Build, Stainless Steel

^^^Good Point... and you guessed my follow up question, which was the kind of battery being used.

Good luck with the sale
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