Laserbee Power meter, great product.

Hello all.

Im an ebay junkie since i started this laser project im building and have for long looked for a nice power meter that will not rip a big hole in my vaulet.

I have now just tested my new Power meter for one day and have to say this is really a greatproduct. and really cheap compared to many others out there. And not cheap in a bad way, simply just cheap prize. :)

Anyway. i wanted to tip some of you ppl out there of this great "meter" as ive seen some ppl wanting one but cant afford a chorhent for 500bucks. and i just talked to the guy who builds them and they are just right now upgrading them so they will come in a nice enclusure soon.

Below are some pics of how it looks, and the last one is from there new meter with enclusure. Dont know when this new one will be on sale but just give the guy a msg, he is a really kind fellow.

ALso it comes with a 9pin Com port cable and a Dvd with their own software. so you can log your metering to an graph file etc etc.

really cool product and works great and really affordable price.

Ebay link:
http://cgi.ebay.com/ws/eBayISAPI.dll...2BSI%26otn%3D4

The $60 postage charge kinda takes the shine off it though ......
:rolleyes:

agreed that looks like a neat little piece of kit @ a good price but inflated shipping is a turn off for sure.

I bought one about 3 months ago on ebay. Every laser I've measured is within a few mw of what the spec was. I'm quite happy with mine.

Looks a lot like a die4thing.

long lost brothers!!

http://www.laser-man.co.uk/2006/inde...d=35&Itemid=31

Quote:

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Originally Posted by andy_con

long lost brothers!!

http://www.laser-man.co.uk/2006/inde...d=35&Itemid=31

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I looked at the manufacturers link before but no mention of price.

Laserbee seems a nice meter, but living in Italy means I'm quite cut off :mad::

QUOTE:
We No Longer Ship To APO/FPO, China, Hong Kong, Indonesia, Ukraine, Argentina,
Uruguay, Lithuania, Russia, Vietnam, Italy, Africa and BELGIUM

Hmm...how easy would it be to incorporate this on into enclosure so that when the beam is live, it displays the output.

Surely the beam needs to terminate (hit it full on) at the tester in order to get a true reading.
So it ain't going anywhere (i.e. out to make a beam show). :confused:

That's a shame. It would be pretty good idea for an add-on if it were possible

yes it is possible to incorperate this in a projector

what you need is a beam splitter with a 99% pass 1% reflect prior to the scanners

with this the reflected portion can be sent to the sensor, the display would have to be calibrated to read true output ( 1mw on sensor = 100mw on display )

if i remember rightly this is the sort of thing that Bill is doing in the pangolin Pass system for audience scanning so he can get a real time sample on power output

all the best ..... Karl

An ar coated piece of glass will get you your .1% to 1% reflection, and with a diffuser in front of it, a simple silicon detector loaded with about 450-750 ohms will be quite linear and a fraction of the cost. I would not use amorphous silicon ie cheap bluish looking solar cells.

Lexel used a simple loaded silicon cell for ranges of 10 mW to 5 watts with just a diffuser and a bluish corrector filter with 1% linearity.


Steve

but those were all in the blue/green range, weren't they?
I dont think the detectors are entirely linear from blue to red

Linear in what aspect? Photodiodes are heavily wavelength dependent simply because photons of different wavelengths have different energies. The current of a photodiode is depends on the number of photons that hits it, not on their energy (unlike a thermocouple). That is assuming the quantum yield is the same for all wavelengths in a range, but I think it is for visible light with Si photodiodes.

I was talking A(or µA) / mW for different wavelengths.

OK, they are fairly linear for a given wavelength, except at the extremes. The slopes (current/absorbed radiant power) for different wavelengths are not the same though, so you will always need to know the wavelength to calculate the power if you use a photodiode.

I think Steve was talking about the linearity for a given wavelength though.

if you split off 1% of a typical hobby laser projector, your down in the noise of a thermal detector. Hence the suggestion of silicon. For any given wavelength they are quite linear, and in your projector, you can check one wavelength at a time.

Steve Roberts