Old 12-12-2014, 03:29 AM #17
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Default Re: Is this normal?

I agree with the others, get it metered to be certain though.


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Old 12-14-2014, 08:40 AM #18
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Default Re: Is this normal?

I have a 800+ mw 405 laser and the spot isn't nearly as bright as my green 60mw laser, not even a tenth as bright.
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Newbie advice: Please take the time to first make an introduction in the Welcome section before posting questions.


Divergence to spot size calc: - 1 mRad is about .057 degrees which expands to be very roughly ~10% the diameter of the moon or sun at their distances.

Divergence Calculator: pseudonomen137's JScript mRad Calculator - Measure your lasers beam dia. at 1 foot & then 20'.

Online calc. to determine spot intensity at different mRad's & powers: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: Laser Power Density Calculator - Ophir

Build a beam expander to reduce divergence: http://tinyurl.com/BeamExpander

University YAG Project The Professor's Homebuilt Lasers Site - YAG Lasers

YAG Power Calc. Laser Peak Power Calculator - Ophir

Angular Size Calculator; use with diode angle of radiation spec. for lens dia. at FL: Angular Size Calculator

Compare different colors: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

High Current Pulse Drivers: https://tinyurl.com/ya7whuk3
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Old 12-14-2014, 08:41 PM #19
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Default Re: Is this normal?

Hey guys, Just wanted to let you all know I am meeting a LPF member in an hour to meter my lasers. I will let you know what I find. I am charging all the batteries to full now.
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Old 12-14-2014, 11:30 PM #20
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Default Re: Is this normal?

Here is the results. That's pretty disappointing for a laser advertised as 400mW. For $90 plus shipping i don't feel this laser is worth the money. Ill be writing Susie for a return and refund. Don't think I will order from o-like again. I'm still waiting on the 250mW 650 that was ordered at the same time as this 405mw.
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Old 12-15-2014, 05:29 AM #21
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Default Re: Is this normal?

that is quite disappointing O-like has been diminishing this year a bit, they are almost just like another usual "lucky dip" laser company, keep up posted with your results from Susie,
How much can that LPM measure? the sensor and Main unit look quite heavy duty!
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Old 12-15-2014, 07:06 AM #22
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Default Re: Is this normal?

The range goes up to 20 watts, though I am unsure of exactly how much the sensor can handle.

These scientech units are really nice and they do pop up here and on eBay every once and a while.
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