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I am looking for some help putting together data logging on my custom LPM I will be selling It has to have 0 to 5 volt capability at better than 8 bit resolution to give a 4 digit readout IE ( 4.132 ) for a 1 mw resolution as my meter can read 1mw to 5 watts. I know 8 bits is only good for 0...

Great demonstration of the effect especially the focusing!

I have a great power meter that goes from a few mw to 5 watts with a Ophir thermopile head for $250 If your interested I will send you pictures of it Jim

Hey Igor I am making a bunch of Thermopile based LPMs and was thinking about a data logging PC interface, what can you tell me about that Thanks Jim

I wanted mine to last around 100 hours others have posted an early death at over 200ma drive current I'm getting 255mw @ 189ma with the Jayrob lens You get what you pay for and to try to overdrive the diode to get more than that is just foolish! My next 405nm will be a 12x then I can get 550mw...

250ma no way will that last!

with my 210 after a lot of research decided on 189ma that gives 250mw+ with a Jayrob lens

I have them out for a reason, focus is way easier for big fingers and the heatsink is so efficient it doesn't matter to me. Also this host provides plenty of room for any placement of the module.....:D

The rest of the pictures

Hey LPF community! I have been in and around electronics since the mid 60's and thats my business today. I built my first laser in the early 80's and I still have that HE-Ne today. High Voltage and lasers are in my book listed under FUN so when I happened upon this forum two months ago it...