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Old 07-19-2007, 02:29 PM #1
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Default Proposition

I want to ship (at my expense both ways) a solar panel and a voltmeter; which I use as non-linear way to measure laser power, so they can find out how accurate it is for me.

I've measured four lasers with it by connecting the voltmeter to the solar panel to measure its output voltage while lasers are pointed at it.

These are the results:
1. My 100mV green measures ~115mV-135mV then drops to ~108mV.

2. My 75mW green CNI measured ~66mV-103mV.

3. My 200mW (rated with 1.5Vs) red measures, ~180mV with 1.2Vs

4. And someone else's 300mW 980nm "lab" laser measures 330mV-332mV

I need the person I send to have a proper and accurate laser measuring device, lasers at different wavelengths, and a high post count (for credibility). I'm willing to pay ~$5 for this plus the shipping charges.

Please respond if interested.


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Old 07-19-2007, 03:18 PM #2
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Default Re: Proposition

i'd be interested to see how it turns out, a lpm from an old calculator and a voltmeter, if only it was that simple. i'm assuming it only measures visible light? like if you point your remote control at it the results show 0. after reading the posts in http://www.laserpointerforums.com/fo...num=1179663591 i doubt the effectivenes of something so simple
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Old 07-19-2007, 06:09 PM #3
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Default Re: Proposition

Quote:
Originally Posted by yew.sir-name
.....
i'm assuming it only measures visible light? like if you point your remote control at it the results show 0. after reading the posts in http://www.laserpointerforums.com/fo...num=1179663591 i doubt the effectivenes of something so simple
No, it measured a 980nm 300mW "lab" laser at 330mV. 980nm is Infrared and invisible to the "naked" eye.

I know itís all a big coincidence that the numbers appear to correlate with the actual output; thatís why I want to know how close these numbers are to the actual output.
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Old 07-20-2007, 01:32 AM #4
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Default Re: Proposition

what is the solar panel off?
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Old 07-20-2007, 07:21 PM #5
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Default Re: Proposition

Quote:
Originally Posted by yew.sir-name
what is the solar panel off?
I have no idea. It was just an extra robot building part in my HS engineering class.
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Old 07-24-2007, 05:39 AM #6
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Default Re: Proposition

Any pictures you have of the solar panel ??
I'm interested.
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Old 07-24-2007, 09:14 AM #7
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Default Re: Proposition

You guys can buy a solar panel from RadioShack and it comes with the specs as well.. It's cheap too

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