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Old 12-31-2012, 08:45 AM #1
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Default In need of LPM

I am looking to buy any device (LPM) that will meter the output power of my lasers (New-Used). Need it to go up to 2W/+ Im not rich I hear about ones going for $100+ but can only find ones for $240+...

-Shane


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Old 12-31-2012, 06:11 PM #2
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Default Re: In need of LPM

Lpm's aren't cheap. The Laserbee is probably your best bet.
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Old 12-31-2012, 06:19 PM #3
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Default Re: In need of LPM

Check out the Laserbee 2.5W USB!
If i recall corectly i got mine for about 150$

Happy new year,
Jim
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Old 12-31-2012, 06:21 PM #4
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Default Re: In need of LPM

Bluefan.nl -- Store -- Lasers, Optics, Electronics, Lab Services

I have one of these, nice simple LPM for basic hobbyist use.
My results with it are nearly identical to Laserbee tests on my lasers.
70 euros, a little over 100 USD shipped to USA.
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Old 12-31-2012, 07:35 PM #5
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Default Re: In need of LPM

Quote:
Originally Posted by Eradicator View Post
Bluefan.nl -- Store -- Lasers, Optics, Electronics, Lab Services

I have one of these, nice simple LPM for basic hobbyist use.
My results with it are nearly identical to Laserbee tests on my lasers.
70 euros, a little over 100 USD shipped to USA.
Thanks for this. Looks just as good and way more affordable. Going to pick one up
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Old 01-01-2013, 12:23 AM #6
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Default Re: In need of LPM

Quote:
Originally Posted by kommed133 View Post
Thanks for this. Looks just as good and way more affordable. Going to pick one up
Are you trying to say that this.....




Looks as good as this....



I suppose you get what you pay for...


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Old 01-01-2013, 04:09 AM #7
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Default Re: In need of LPM

Quote:
Originally Posted by Eradicator View Post
Bluefan.nl -- Store -- Lasers, Optics, Electronics, Lab Services

I have one of these, nice simple LPM for basic hobbyist use.
My results with it are nearly identical to Laserbee tests on my lasers.
70 euros, a little over 100 USD shipped to USA.
Wow this looks really cheap. What's the catch.. Hmm!
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To buy/build:
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Old 01-01-2013, 01:05 PM #8
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Default Re: In need of LPM

I would have gone for a laserbee too..

On the other hand, How is LB 2W LPM better than a 2W BF LPM ? They both are just as accurate , and have the same statistical deviation of 10% ?
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Old 01-01-2013, 03:47 PM #9
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Default Re: In need of LPM

Jerrys right you get what you pay for, I think the Laserbee is much nicer. Just my 2 cents...
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Old 01-01-2013, 04:54 PM #10
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Default Re: In need of LPM

Laserbee products are the best, and Jerry is always helpful for any information! I strongly recommend these LPMs
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Old 01-02-2013, 11:29 AM #11
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Default Re: In need of LPM

Quote:
Originally Posted by sjesper View Post
Wow this looks really cheap. What's the catch.. Hmm!
Quote:
Originally Posted by sinner View Post
I would have gone for a laserbee too..

On the other hand, How is LB 2W LPM better than a 2W BF LPM ? They both are just as accurate , and have the same statistical deviation of 10% ?
I'll try to answer your questions as you asked them..
This is what we know...

1) the LaserBee A has a True Zeroing control to Zero
the meter without needing to wait for the readings to
acclimate to the ambient test area air temperature
after a metering which could take anywhere from
60 seconds to 20 minutes to reach Zero.

2) the LaserBee A uses a split rail supply that allows
the Zero Control to actually Zero the reading after
a series of High Power Laser tests that a single supply
circuit is not able to do.

3) the Electronics of the LaserBee A are housed in
a high quality textured (anti-reflection) plastic enclosure.

4) the LaserBee A Electronics are mounted on a PCB.
(not sure of the other LPM since its electronics and
assembly have never been posted on the Forum)

5) the LaserBee A has a detachable Thermopile head
that makes it easier not to damage when storing.

6) the LaserBee A Thermopile Sensor is more protected
from scratches and damage since it is recessed in the
Thermopile Head.

7) the LaserBee A enclosure has a 9Volt Battery tray
with sliding cover.

8) The LaserBee A draws a mere 32mA from the 9Volt
battery. (not sure of the other LPM)

9) the LaserBee A enclosure measures a very small
4.00" x 2.50" x 1.50"

As to the 2nd part of the question...

How do you know... Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

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LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

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Also available on eBay:Check availability here..

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Last edited by lasersbee; 01-02-2013 at 12:20 PM.
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Old 01-02-2013, 01:15 PM #12
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Default Re: In need of LPM

I love my Laserbee and I highly recommend going with jerry on this. The Laserbee II deluxe comes in a nice sloped enclosure with rubber feet, its got data logging capabilities, the thermopile sensor is better protected like jerry said, plus the guy that designed and built it is a click away^^^. I've emailed bluefan twice with no reply. You could also just get a used ophir 20c head and a dmm.
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532nm 65mW pen
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Old 01-02-2013, 01:58 PM #13
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Default Re: In need of LPM

Quote:
Originally Posted by lasersbee View Post
I'll try to answer your questions as you asked them..
This is what we know...


How do you know... Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
I really dont wanted you to go into a lot of trouble explaining the high quality of LaserBee's since every one knows it ..

To my knowledge , It was 10%.. But its 5% now i know

For the other part that if I did any tests on my own, Well no.. I am not lpm manufacturer as you may know so it was just a silly question from you!
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Old 01-10-2013, 01:19 AM #14
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Default Re: In need of LPM

Quote:
Originally Posted by lasersbee View Post
I'll try to answer your questions as you asked them..
This is what we know...

1) the LaserBee A has a True Zeroing control to Zero
the meter without needing to wait for the readings to
acclimate to the ambient test area air temperature
after a metering which could take anywhere from
60 seconds to 20 minutes to reach Zero.

2) the LaserBee A uses a split rail supply that allows
the Zero Control to actually Zero the reading after
a series of High Power Laser tests that a single supply
circuit is not able to do.

3) the Electronics of the LaserBee A are housed in
a high quality textured (anti-reflection) plastic enclosure.

4) the LaserBee A Electronics are mounted on a PCB.
(not sure of the other LPM since its electronics and
assembly have never been posted on the Forum)

5) the LaserBee A has a detachable Thermopile head
that makes it easier not to damage when storing.

6) the LaserBee A Thermopile Sensor is more protected
from scratches and damage since it is recessed in the
Thermopile Head.

7) the LaserBee A enclosure has a 9Volt Battery tray
with sliding cover.

8) The LaserBee A draws a mere 32mA from the 9Volt
battery. (not sure of the other LPM)

9) the LaserBee A enclosure measures a very small
4.00" x 2.50" x 1.50"

As to the 2nd part of the question...

How do you know... Have YOU done those accuracy
comparison tests...

The LaserBee A follows our recently calibrated Newport
1825C LPM to within 5% of its range. Since it does not
use a microprocessor the accuracy depends largely on
the OpAmp... Thermopile Sensor and Broadband coating
of that sensor and the Accuracy of the LPM that it was
calibrated to.

Both of these LPMs can read a Laser to 2Watts and a
DIY LPM will be even less expensive on parts to build.

The choice is ultimately left up to the buyer...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
The Bluefan Basic LPM has one strong advantage: Price.

I think your point 3 is a bit funny, anti-reflection textured enclosure. The Newport 1825C is a nice little meter, I got one myself as well. What sensor do you have with it Jerry?

I'm busy doing my graduation assignment (And I was at CERN for a long time) so I may appear away sometimes but I'm picking up on things. For now I try to make power meters, in the future I hope to improve the design and provide some competition on the whole laser enthousiast LPM market but that may take quite a while.
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Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

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Old 01-10-2013, 02:53 AM #15
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Default Re: In need of LPM

I really like my Kenometer Pro + Ophir. but I dont think they available anymore. if you find one used, grab it. it has a lot of nice features. its all hand wired inside which has pros and cons. con is it doesn't look very good and MAYBE some noise might be introduced. but i doubt the latter is significant. you use it closed up so you dont have to look at the wiring. functionally its amazing with on screen graphing, very configurable and outputs to USB in real time. plus the Ophir sensor is pro quality. on the other hand I have no idea if these even come up that often. the laserbees are also good i understand but i never used one before so go with other people's comments on that model. plus the guy is canadian and thats a plus!
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All together too many lasers:
650nm: 5mw pointer (early)
250mw O-like OL-CR-250 (170mw)

635nm: 500mw pointer rhd build 18650 SH-032 (650mw)
500mw O-like lab

532nm: 100mw SH032 DX module pointer (120mw)
150mw tri Lights Lab (260mw)
600mw Wicked Lasers Spyder III Krypton first gen

473nm 50mw Ultra Lasers Labby (over spec 160mw)
488nm 80mw Multi-line AL60X Argon
445nm: 1.3W Flaminpyro SS (1350mw) 1.4W
Wannaburn Super-small SS (1430mw)
2.9W RDTech 9mm SH032

450nm: 150mw OSRAM single mode 450nm lab
200mw Lazerer OSRAM single mode 450nm

405nm: 100mw WL E3 (85mw)
500mw 405nm O-like lab
500mw 405nm Jayrob SS (560mw)

3x Shinp 650/532nm/445nm 250+100+300mw Light show (modified to include the 445)

numbers in () are average run for 1 min IR filtered
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Old 01-10-2013, 04:03 AM #16
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Default Re: In need of LPM

The ophir heads are on ebay quite often. After that, many, many members have been able to build nice LPMs from them. IMO the response time of the ophir is the selling point.

Last I checked they were $195 just for the head. Not exactly cheap.

@OP - Just keep an eye out, 1-2 used LPMs pop up every couple of months in the ~$120 range.
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