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Old 01-01-2015, 07:00 PM #1
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Default Hi, and thanks for welcoming me, LPF!

Hi, everyone! I've read all the stickies, and it appears as though this is a very nice community in which I can expand my now minute knowledge of lasers. All I ever had was a tiny red laser pointer that was definitely under 1mw up until a few weeks ago when I purchased a 10 dollar green laser on eBay which was much brighter than I expected for a laser labeled as 5mw. My older brother believes it is actually closer to 100mw. So I really know almost nothing about laser pointers, other than they're rather incredible instruments and I would like to hear from all of you about them!

Thanks for all your hospitality!

Sincerely,
Leetstorm.



Last edited by Leetstorm; 01-01-2015 at 07:00 PM.
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Old 01-01-2015, 09:00 PM #2
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Default Re: Hi, and thanks for welcoming me, LPF!

Let me quickly be the first person to welcome you to the forum! If I can get this post in before the next. Yes, those 5mw laser on ebay for ten bucks, the ones often touted to go 8000 meters or 5 miles can put out up to 100mw, on average between 50-70mw with about 20 or more percent of that really infrared you can't see.
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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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Old 01-01-2015, 09:19 PM #3
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Default Re: Hi, and thanks for welcoming me, LPF!

Welcome to LPF!

-Alex
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Old 01-02-2015, 01:46 AM #4
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Default Re: Hi, and thanks for welcoming me, LPF!

run away dood-
its a TRAP!!!

BUT if its too late for you already.... WELCOME

Since you admit being 'New' I will assume you have Qs.

SO.. that said .. adding your location into your profile helps us to help you.

BUT by ALL MEANS (even google) do your BEST to find your own answers and saving us as your LAST resort-

We all have other lives and answering the same Qs is a waste of our time.

A great idea is to start at the top section on home page- click it and read/skim ALL the stickied threads and there are MANY- and do that to all sections (some call these sub-forums or just forums)--

I have some Positive FEEDBACK to give you after you add your location.
And you should be getting posts in this thread from others near your location-great for hands-on help or getting your lasers metered for free-etc
Just be careful- especially if contacted by another new member-- when in doubt contact a MOD before risking your 'safety'--
There may be a social group for your area or for other interests-

Reading the stickies will answer a lot of questions before you can ask them.

good luck

hak



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QS/FB3 +Beyond-APC40-Mamba Black(clone) 5paghettix2 and I-show x2-Kasio synth-midi
KGB- 532 1.1W 445 2.2W 655 1.3W DT Pro 40 still needs more red.
KGB1W+ 532 DT Pro 40 soon to be GB.
Laserking 1300RGB FULL COLOR 30K(may be FS)
Laserking RGB LK PD2 500 and LK SD 850
REKE RGB 500- G 300
HeNes-(12)R(3)G-COH-594/5 mW-thnx DrSam
MULTILINE-147mW[
445nm 180mW-Mini spiro-Yob.
LPMs-RadiantAlpha& Pro5W-AixiZ SPER/KenmeterLite/LB1
Spacelas 1178mW 655nm/AixiZ 300mW532&
2 B&W 473nm 5/6mW lab
JETLRS1.3W&1.2W-MGL-H
638 180mW ttl mimi lab (av. 230mW)
405 100mW ttl mini lab
445 300 mW ttl mni lab ^AixiZ^ all for a lumia PJ
*MightyMite 2000* RGB all diode 2.2W 30K- 637/520./450...NEW!!
Guide DIY Pjs by Dan-
http://nqlasers.com/scannerreference/index.php?title=Main_Page

Last edited by hakzaw1; 01-02-2015 at 01:47 AM.
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Old 01-02-2015, 01:51 AM #5
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Default Re: Hi, and thanks for welcoming me, LPF!

Welcome here. When location is added, plus from me.
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Old 01-02-2015, 05:07 AM #6
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Default Re: Hi, and thanks for welcoming me, LPF!

It's a trap, lol, like moths to the flame, attracted to lasers.
__________________

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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Old 01-05-2015, 12:49 AM #7
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Default Re: Hi, and thanks for welcoming me, LPF!

Thanks, guys! Location added!
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Old 01-05-2015, 02:04 AM #8
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Default Re: Hi, and thanks for welcoming me, LPF!

Welcome to LPF and everyone is right. This is the home of photonic addictions ! The first step is to admit you have a problem, second step is to become a member! LOL
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405nm 1.1W C-11 Smooth Flow Mrcrouse Kit
445nm 3.2W Mrcrouse Mace Of Doom Kit
445nm 1.6W Pocket Rocket Pman Special Custom *Al Heatsink
447nm 1W Dragon Lasers Spartan Fried Diode and Lens
447nm 1W Dragon Lasers Spartan working perfectly
450nm 170mw Mrcrouse 501b Kit
520nm 100mw Mrcrouse 501b kit
532nm 100mw SD Laser 303
532nm 100mw SFCG-100
532nm 100mw Classic Playmates Phaser Ghetto Build
532nm 300mw SkyLasers HL-532-300
638nm 220mw Mrcrouse 501b kit
650nm 100mw Pen
650nm 200mw SFCR-200
650nm 300mw Mrcrouse Ultrafire 903 Kit
660nm 300mw RL-118 with LPC-840


NOIR Lasershields DBY style #39 laser goggles
Eagle Pair® 190-540nm & 800-1700nm OD5 Laser Safety Goggles
Laserbee II Deluxe 3W LPM

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