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12-13-2015, 01:47 AM #1
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RavenousRedd
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Weird Private Message

https://gyazo.com/e052b85c9a50dd780686e9aed2a7a8bb

I recently got that PM and I am assuming he is banned for that reason.
Am I right or was he telling the truth?

12-13-2015, 01:59 AM #2
 Class 3B Laser Join Date: Jan 2014 Location: Iraq Posts: 4,288 Rep Power: 2132
Class 3B Laser

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Re: Weird Private Message

As wild as the internet can be, I'm not even going to open that link. Can you cut and paste it here?
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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

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12-13-2015, 02:13 AM #3
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ARG
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Re: Weird Private Message

Eh he's been banned so I would just ignore anything he says.

12-13-2015, 02:50 AM #4
 h new guy Join Date: Oct 2015 Location: Los Angeles Posts: 498 Rep Power: 397
OVNI
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Re: Weird Private Message

Well I just opened it now realizing I might have been throwing caution to the wind, hold on, need to check on my friend Erwin's cat I'm taking care of ...

... whew! Cat's good, Mr. Schrödinger won't be mad. And so far, so is my computer.

Last edited by OVNI; 12-13-2015 at 03:51 PM.

12-13-2015, 03:05 AM #5
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Pi R Squared
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Re: Weird Private Message

Quote:
 Originally Posted by RavenousRedd I recently got that PM and I am assuming he is banned for that reason. Am I right or was he telling the truth?
Whatever reason he was banned for, it wasn't for posting that.

The first company has a bad reputation here, they sell low quality mass produced lasers with exaggerated claims and apparently they break easy or don't last long. Their address is in Hong Kong.

The second company I am not sure about, this recent thread was about a purchase from them but the company name has been edited out of the first post.
Still hard to check the wavelength between 405nm and 445nm

Alan
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Keychain 650nm <5mW
Quartet 4-in-1 630-680nm <1mW

AtlasNova 635nm <5mW
MillionAccessories 532nm <5mW broken
M462 462nm one of a kind (in progress)
PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
Radiant Electronics X4 3.7W Laser Power Meter

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12-13-2015, 03:33 AM #6
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RavenousRedd
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Re: Weird Private Message

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