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Old 04-29-2012, 10:21 PM   #1
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Default Some interesting LPM results...!

Well I finally got to test my C6 first ever build (pic here: Hi everyone) and a couple of laser pointers ordered from Ebay.
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices
New 5mW 532nm Green Laser pointer pen Astronomy Mid-open Visible Beam Light | eBay

These were all rated at < 5 mW, other than the C6 that is

First up the C6 with a flexdrive V5 preset at 1.5 A from DTR. With a 3 element glass lens compared to a G2 and tested with both an AW 2000 mAh battery and a panasonic 3100 mAh. I didnt include the graphs for the panasonic battery tests, but the results were consistantly 2-3% lower than the AW's.

AW 3 element glass:
Cheap Ebay pointers and some interesting LPM results...!-blue-ant-aw-3-element.jpg

I attempted to copy Jayrobs idea, but with a G2 lens; FS: 405-G-1 Glass Lens Mod - 31% Increase vs AixiZ! and drilled out an aizix lens mount with a 1/4" drill bit. I had to sand a little with some emery paper before the lens would fit. The spacer was cut from the 6 mm section of an old radio antenna and dropped into place before securing the lock nut. The result was 1955 mW at only 1.5 A! giving an increase of 27%! This is slightly lower than Jayrobs 31%, but I think I can improve on it by using a slightly larger bore spacer and by drilling out the entry aperture of the lens mount too.

Here are the results - AW G2:
Cheap Ebay pointers and some interesting LPM results...!-blue-ant-aw-g2.jpg

The ebay laser pointers were surprisingly powerful too!

First up the 405 nm. With 2 NiZn 1.6 V batteries it gave an impressive 103 mW. A small battery spacer was made from an old marker pen and a small steel rodCheap Ebay pointers and some interesting LPM results...!-_dm45917.jpg (measured 0.0 - 0.1 ohm) and an AW 10400 350mAh battery giving 134 mW! (23% increase)

Purple 10400:
Cheap Ebay pointers and some interesting LPM results...!-purple-stu-10400li.jpg

The next was the red 650 nm, which gave an extremely impressive 155 mW with the NiZn and with the 10400 battery 188 mW!! (18% increase)
Red 10400:
Cheap Ebay pointers and some interesting LPM results...!-redstu-10400li.jpg

Finally the green gave 24 mW with the NiZn and 33 mW with the Li battery. (27% increase)

Green 10400:
Cheap Ebay pointers and some interesting LPM results...!-greenstu-10400li.jpg

Not bad considering these are 9, 7 and 5 dollars respectively! Hope you find these results useful!


Edit: Just thought Id add a link to a post I made (in Kommed's Thread) about cheap greens. Here I got up to 47 mW unfiltered and 23 mW IR filtered, with a single 10440!
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Last edited by grainde; 05-20-2013 at 04:30 PM. Reason: Avoiding publicity, as some recent web publications have sited out of context info on laser pointers using threads from LPF.
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Old 04-30-2012, 06:39 AM   #2
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Default Re: Some interesting LPM results...

Quote:
Originally Posted by grainde View Post
The result was 1955 mW at only 1.5 A! giving an increase of 27%! This is slightly lower than Jayrobs 31%

Very nice. Glad you like it.

I have been seeing quite a few builds @ 1.5A hitting just under 2W with the G-1/G-2's. The G-1/G-2's give a 31% increase over the three element with the 405nm diodes. The gap is a little lower with the 445's as you see. Actually 27% is really good. Usually around 250mW-300mW difference between the two with 445's set 1.5-1.8A.

Last edited by DTR; 04-30-2012 at 06:41 AM.
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Old 05-11-2012, 11:42 PM   #3
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

I purchased a violet, red and green pointer on ebay all at <5mw to introduce lasers to my kids and teach them proper respect. At 7 and 8 they are now well versed in the hazards of lasers and show a healthy respect for them. Of course, they will never be exposed to anything over 5mw at their ages, but I'm much more comfortable that when they get older, I'll be able to trust them with higher outputs knowing they'll use protective gear and good handling practices. For $3 a pointer, it was well worth the money.
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Old 05-12-2012, 12:57 AM   #4
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

Quote:
Originally Posted by Zircarg View Post
I purchased a violet, red and green pointer on ebay all at <5mw to introduce lasers to my kids and teach them proper respect. At 7 and 8 they are now well versed in the hazards of lasers and show a healthy respect for them. Of course, they will never be exposed to anything over 5mw at their ages, but I'm much more comfortable that when they get older, I'll be able to trust them with higher outputs knowing they'll use protective gear and good handling practices. For $3 a pointer, it was well worth the money.
How do you know for sure that your children's Lasers are
not >5mW...
You can not trust the Label on cheap low powered Lasers...

I've received <5mW eBay Lasers that output >60mW...
Enough to cause eye damage...

Do they wear appropriate Laser Safety Goggles/Glasses when
operating their Lasers...


Jerry
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Last edited by lasersbee; 05-12-2012 at 12:59 AM. Reason: spelling errors
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Old 05-12-2012, 08:20 AM   #5
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

Quote:
Originally Posted by Zircarg View Post
I purchased a violet, red and green pointer on ebay all at <5mw to introduce lasers to my kids and teach them proper respect. At 7 and 8 they are now well versed in the hazards of lasers and show a healthy respect for them. Of course, they will never be exposed to anything over 5mw at their ages, but I'm much more comfortable that when they get older, I'll be able to trust them with higher outputs knowing they'll use protective gear and good handling practices. For $3 a pointer, it was well worth the money.

Lasersbee is quite right, in the OP above the ebay lasers were all labeled as <5 mW and these were 134 mW, 188 mW and 33 mW respectively!

Maybe you should try and get them metered?
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100mW 405 PHR
700mW 405

2W 445 C6--link--
+2.3W 445 --link--
+2.5W 445 --link--

190mW 450 --link--
15mW 510nm
5mW 532 --link--
25mW 532 --link--

520mW 638 --link--
1W 638

250mW 650
250mW 780

Poppas MTG2 @ 6 A!
Poppas mod 3A --link--
Sipik 98 Cu pill/star mod --link--

Last edited by grainde; 05-12-2012 at 08:21 AM.
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Old 05-12-2012, 03:05 PM   #6
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

That's good advice. I'll have to get them metered before getting them out again.
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Old 05-26-2012, 02:42 AM   #7
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

Quote:
Originally Posted by grainde View Post
Lasersbee is quite right, in the OP above the ebay lasers were all labeled as <5 mW and these were 134 mW, 188 mW and 33 mW respectively!

Maybe you should try and get them metered?
Well, I'm glad I took your advice. I purchased a LaserBee LPM to meter my ebay pens. I couldn't believe it! The 532 was 20mW and the 405 peaked at 62mW. The two reds I have ranged between 5 and 7mW so I feel safe letting the kids use those. They definitely won't be getting the other pens without goggles on.

Thanks folks for your words of wisdom!
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Old 05-26-2012, 04:02 PM   #8
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

So are they finally binning PHR's now for the cheap blu-rays?
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Old 05-26-2012, 05:52 PM   #9
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

what does binning mean? is it a special term for doing something to the diode to make it more/less powerfull or is it just that you throw them away? i read the same term in another thread hence i ask
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Old 05-26-2012, 06:05 PM   #10
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

Binning is sorting the diodes out on the classifications like efficiency, power, color etc. You will have classes of the same diodes. The better ones are sold at premium prices. It is just economy. Intel does it all the time with the CPU's
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Old 05-26-2012, 07:18 PM   #11
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

oh right, so a binned phr would be able to put out more mw than a usual phr.
thanks blord
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Old 05-27-2012, 05:05 PM   #12
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Default Re: Cheap Ebay pointers and some interesting LPM results...!

binning means all the diodes are tested, and then sorted. the real bright ones go in bin A. the dim ones go in bin B.
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