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laser power meters

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is there a way for an electronics hobbyist to build a way of measuring laser power output typicaly 100mW
cheaply !!
 

MarioMaster

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andy_mouse_brown said:
is there a way for an electronics hobbyist to build a way of measuring laser power output typicaly 100mW
cheaply !!
Not without having a calibrated meter to compare to, no.
 
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MarioMaster said:
[quote author=andy_mouse_brown link=1237154036/0#0 date=1237154036]is there a way for an electronics hobbyist to build a way of measuring laser power output typicaly 100mW
cheaply !!
Not without having a calibrated meter to compare to, no.[/quote]

can't you get those sensors that measure to about 125mw that plug into a multi-meter on ebay for like 25-30 bucks? I can't remember the name but if you know what i'm talking about can you link him for me? thanks

gotwake424
 
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I'am not looking for accuracy just a basic place to start I mean is it thermal ? I'am sure I once saw an article that described a basic way of measuring output using a photo diode am I going mad?
 
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Thanks lasersbee thats exactly what i was talking about :) Could not remember the name for the life of me tho

gotwake424
 

691175002

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I built benm's thermal power meter (its in a thread somewhere) for perhaps 5$ of parts and just using its self-calibration it seems pretty accurate.  Can measure down to 2-5mW and measured a Kryton that kenom had set to 100mW as 103mW.  That laser is the only one I have that has actually been tested on a real power meter, but it gives very plausible readings for all my other lasers. It can take 10 minutes+ to calibrate properly though.
 

lasersbee

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Gotwake424 said:
Thanks lasersbee thats exactly what i was talking about :)  Could not remember the name for the life of me tho

gotwake424
You can instantly measure from 0.1mW to 120mW in .1mW increments...
good for most lasers 500nm to 1050nm (but not Blu-Rays).. and it comes pre-calibrated..
with instructions and an optical correction chart.. :cool:

Jerry
 




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