Old 11-17-2017, 04:07 AM #1
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Default new user reporting in

Greetings forum folk!

I'm Chris, seen something around 45 trips around the sun.

Been hacking hardware and software since floppies stored 135kb and 8-bit was a thing. My childhood was largely centered around these two books:

https://archive.org/stream/Radio_Sha...e/n63/mode/2up
and
https://archive.org/stream/Beneath_A...e/n17/mode/2up

Looking forward to learning with you all!

Make great days.


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Old 11-17-2017, 04:56 AM #2
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Welcome and enjoy the forum
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Old 11-17-2017, 05:13 AM #3
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Default Re: new user reporting in

Enjoy your stay.

May I ask what brought you here?
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Old 11-17-2017, 06:21 AM #4
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Default Re: new user reporting in

Welcome anonymix!

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Old 11-17-2017, 07:27 AM #5
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Default Re: new user reporting in

Thanks guys!

Quote:
Originally Posted by CynicalBrad View Post
May I ask what brought you here?
The amazing mad scientist styropyro mentioned this forum at some point.

But, I've always been fascinated with lasers since seeing the movie Real Genius as a kid. Was lucky enough to get a HeNe from an uncle that ran a discotheque, as they were wont to call them then, but blew the power supply combining tube current and ground with an errant screwdriver... I think I was about 12.

Now, I'm fascinated with the diode tech advancements.
Am starting with these books:

Haiyin Sun
A Practical Guide to Handling Laser Diode Beams (SpringerBriefs in Physics)
2nd Edition

Haiyin Sun
Laser Diode Beam Basics, Manipulations and Characterizations (SpringerBriefs in Physics)
2,012 Edition

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Old 11-17-2017, 11:14 AM #6
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Welcome to the forum, enjoy and be safe.
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Old 11-17-2017, 11:16 AM #7
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Welcome to the forum from a fellow newbie.
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Old 11-17-2017, 03:37 PM #8
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Default Re: new user reporting in

Welcome!

Quote:
Originally Posted by Alaskan View Post
Welcome. A few general questions:

Marital status, birth certificate, religious preference and political outlook or affiliations? Parents names, siblings of the same or opposite s.e.x. still living? Education, current employer, recent photo, phone number? Age, s3x, height weight, and general body type. Any communicable diseases, how long has it been since your last flu shot? I have PM'd the document to you, please provide all information and FAX to me.

Note: All other information moot to us if you simply indicate you like lasers, but it is nice to know where you are in the world and your hobby interests.
Man, that's a pretty detailed document! Couldn't you at least use e-mail? Fax is obsolete!
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Old 11-17-2017, 03:50 PM #9
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Default Re: new user reporting in

Yea, but if you are forced to FAX something, you have to work for it, have to either get the software to convert or find a machine somewhere, far more difficult.
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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.

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Old 11-17-2017, 03:59 PM #10
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Default Re: new user reporting in

Quote:
Originally Posted by Alaskan View Post
Yea, but if you are forced to FAX something, you have to work for it, have to either get the software to convert or find a machine somewhere, far more difficult.
I just want fax machines to die already, that way I don't need to deal with them anymore when they break.
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Old 11-17-2017, 04:33 PM #11
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Default Re: new user reporting in

Welcome to LPF you will find a good deal of information here enjoy and be safe

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Old 11-17-2017, 05:02 PM #12
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Default Re: new user reporting in

Quote:
Originally Posted by Alaskan View Post
Yea, but if you are forced to FAX something, you have to work for it, have to either get the software to convert or find a machine somewhere, far more difficult.
Used to be a pain, not anymore.
Now there's services like https://faxzero.com and a dozen others of varying quality/annoyance.

---------------------------------

I posted this in the ebay finds thread, but figure I'll ask here too:
Am looking at buying two of:

IPG Photonics 970nm 60W-100W Laser Diode Integrated Collimator, Reinforced Fiber

for $1700 each. Worth it? Overpriced?

Figure they'd maybe be good for a future ytterbium pumped something...


Last edited by anonymix; 11-17-2017 at 05:04 PM.
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Old 11-17-2017, 05:10 PM #13
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Default Re: new user reporting in

You edit as much as I do, same first name, brothers!
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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

RHD's Calc: http://lsrtools.1apps.com/RelativeBr...&useRaleigh=on

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Old 11-17-2017, 06:21 PM #14
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Default Re: new user reporting in

Quote:
Originally Posted by anonymix View Post
Used to be a pain, not anymore.
Now there's services like https://faxzero.com and a dozen others of varying quality/annoyance.

---------------------------------

I posted this in the ebay finds thread, but figure I'll ask here too:
Am looking at buying two of:

IPG Photonics 970nm 60W-100W Laser Diode Integrated Collimator, Reinforced Fiber

for $1700 each. Worth it? Overpriced?

Figure they'd maybe be good for a future ytterbium pumped something...

Nobody on LPF plays with those sort of toys--no interest in building industrial machines .

$2149 for someone's decommissioned old junked industrial machine 970nm invisible and very dangerous output level laser?

Could be worth it if you have a real purpose/actual use that requires it and not enough money for a new replacement or have money to burn on laser curiosities, it might be worth it. Anyone that has a machine that requires that buys new ones after X hours for obvious reasons, I would guess--like can marking business people.

If just a hobby thing you might want to check out low cost new 445nm engraving heads OPTLasers makes here: https://optlasers.com/en/34-engraving-laser-heads

Last edited by Encap; 11-17-2017 at 08:58 PM.
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Old 11-17-2017, 11:47 PM #15
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Default Re: new user reporting in

Welcome to the Forum Chris...
Enjoy your stay and be Laser Safe.

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Old 11-18-2017, 12:20 AM #16
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Welcome to the forum.
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