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01-22-2016, 03:53 AM #17
 Class 3B Laser Join Date: Jan 2014 Location: Near Mosul, Iraq Posts: 4,252 Rep Power: 2090
Alaskan
Class 3B Laser

Join Date: Jan 2014
Location: Near Mosul, Iraq
Posts: 4,252
Rep Power: 2090
Re: HAPPY Ears_and_Eggs Day LPF

Happy Birthday!

__________________

http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

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

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

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01-22-2016, 09:47 AM #18
 Class 3R Laser Join Date: Apr 2015 Location: Fall river MA Posts: 1,452 Rep Power: 1255
GSS
Class 3R Laser

Join Date: Apr 2015
Location: Fall river MA
Posts: 1,452
Rep Power: 1255
Re: HAPPY Ears_and_Eggs Day LPF

Happy B Day from me also!! Love the avatar by the way

01-22-2016, 08:31 PM #19
 Class 2M Laser Join Date: Dec 2015 Location: Southern Ontario, Canada Posts: 859 Rep Power: 1176
ElectricPlasma
Class 2M Laser

Join Date: Dec 2015
Location: Southern Ontario, Canada
Posts: 859
Rep Power: 1176
Re: HAPPY Ears_and_Eggs Day LPF

Happy belated birthday
__________________

I'm selling some custom machined hosts. Click here to take a look!
__________________

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650nm: Custom build Ehgemus handheld, 250mW
520nm: Custom built Ehgemus handheld, ~800mW
532nm: Custom made GITD Pocket laser: ~133mW
532nm: Chrome laser pen: ~50mW
532nm: Cheap eBay 303: ~60mW
465nm: Custom built potato masher host: 4.2W
445nm: Silver Series from Podo (Sanwu): 2.9W
445nm Pocket Series from Podo (Sanwu): 500mW
405nm: eBay pen

Keep yourself safe. *link*
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