Welcome to Laser Pointer Forums! If you are looking for a laser you may want to check out the database of laser pointer companies. The link will open in a new window for your convenience.

 Laser Pointer Forums - Discuss Laser Pointers First item sold on ebay was a broken laser pointer Laser Pointer Company Database     Laser Top Sites List     Lasers by Type     Green Lasers

11-28-2014, 11:47 PM #1
 Class 2M Laser Join Date: Oct 2013 Location: Ohio Posts: 542 Rep Power: 131
FlutterPie
Class 2M Laser

Join Date: Oct 2013
Location: Ohio
Posts: 542
Rep Power: 131
First item sold on ebay was a broken laser pointer

I thought it was interesting to hear, so figured Id share it here

How Did eBay Start?

__________________

“If the words ‘life, liberty, and the pursuit of happiness’ don’t include the right to experiment with your
own consciousness, then the Declaration of Independence isn’t worth the hemp it was written on.”
-Terence McKenna

11-28-2014, 11:55 PM #2
 Class 3B Laser Join Date: Jan 2014 Location: Near Mosul, Iraq Posts: 4,279 Rep Power: 2124
Class 3B Laser

Join Date: Jan 2014
Location: Near Mosul, Iraq
Posts: 4,279
Rep Power: 2124
Re: First item sold on ebay was a broken laser pointer

Interesting story! +Rep.
__________________

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

_______

11-28-2014, 11:59 PM #3
 Class 2M Laser Join Date: Mar 2009 Location: Brighton,MI Posts: 928 Rep Power: 111
starlight
Class 2M Laser

Join Date: Mar 2009
Location: Brighton,MI
Posts: 928
Rep Power: 111
Re: First item sold on ebay was a broken laser pointer

Incredible find
__________________
Lasers:
405nm E-bay 303 host (peak 113mW) 13% IR dead
405nm Ehgemus host 900mW (peak 635mW 3E lens) had 2 both died in first minute
450nm home made labby NUBM44 6w (peak 7.2w)
445nm Ehgemus RPL host 3W (peak 3.5W)
445nm home made labby 3W (peak 3.1W)
445nm 501b by Blord 2.5W (peak 2.7W)
447nm Dragon Lasers Spartan 1W (peak 1.3W)
520nm custom Ehgemus host NDG7475 1W (peak 1.5W)
520nm Ehgemus host PL520-B1 120mW (peak 143mW)
532nm labby 500mW (peak 630mW)
532nm Dragon Lasers Viper 75mW (peak 122mW)
532nm C6 host (peak 103mW)
532nm E-Bay 303 host 200mW (peak 95mW) 15% IR
589nm Dragon Lasers Spartan 50mW (peak 115mW)
650nm C6 host (peak 153mW)
650nm E-Bay 303 host 200mW (peak 141mW) 75% IR
650nm DVD diode Mini Mag host 54mW (my first build)
650nm dollar store mini pen 5mW X2

808nm Wicked Lasers E2 400mW (peak 598mW)

Dragon Lasers 10x Beam Expander
Dragon Lasers "new" 2x Beam Expander
Dragon Lasers DGTBF
Dragon Lasers LSG02 goggles 190-548nm
Eagle Pair SL-BLG2 goggles 190-540nm

LPM:
nospin Ophir 20c-A-1-Y MrCrouse full wrap heatsinked

Flashlights:
Fenix tk61vn

11-29-2014, 12:16 AM #4
 Class 1M Laser Join Date: Aug 2014 Location: Beijing, China, Earth. Posts: 175 Rep Power: 20
NRGLite
Class 1M Laser

Join Date: Aug 2014
Location: Beijing, China, Earth.
Posts: 175
Rep Power: 20
Re: First item sold on ebay was a broken laser pointer

0_o.... ANOTHER BIT OF LASER TRIVIA TO ADD TO MY BRAIN!
Seriously, that is good. 'Tis ironic that the company that hosts so much cheap and virtually broken lasers started from a single broken laser pointer that somehow, was not ridiculed for its utter deadness. Ha ha.
__________________

This guy's not getting blinded. Got the safety.
In school; gonna take me time to answer stuff.
1W 445 nm laser.
Resurrected green 5 mW green module
There are two kinds of light: one that illumines and one that glares

WHAT HAPPENS WHEN YOU GET HIGHLY OFF-TOPIC:
Here
"If thine enemy be hungry, give him bread to eat; if thine enemy be thirsty, give him water to drink;so will you heap burning coals upon his head, and God will reward thee."-Proverbs.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

All times are GMT. The time now is 11:14 PM.

 -- DarkShadows V5 -- Responsive LPF -2562016 -- Default Style Contact Us - Laser Pointer Forums - Archive - Top