Measuring power output of laser
Trying to improve the meter reading of "10 watts" output on the sharplan720 meter. There are various things I have to do in overhauling the m/c, but I want to have an external method of measuring the power in the beam.
I have long distant memories of measuring ir in the physics lab at school, but need a refresh when it comes to making some sort of bolometer.
I've googled various combinations of "power measurement/ir/bolometer/simple" but seem only to get devices that need liquid helium, or indium antimonide lenses.
I'm looking for a simple design based on an aluminium block and perhaps a bead thermistor.
Any links/ideas gratefully accepted.
Many thanks
John
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