Author Topic: Good Bye Beautiful Eyes  (Read 18051 times)

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Offline Sionyn

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Good Bye Beautiful Eyes
« on: March 10, 2011, 04:25:25 pm »
eecs guy
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #1 on: March 10, 2011, 04:49:00 pm »
I wanna build one! I think I actually have the right goggles sitting around here somewhere. That would be an interesting project.
 #include "main.h"
  #include <pic.h>
// #include <killallhumans.h>
 

Offline Sionyn

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Re: Good Bye Beautiful Eyes
« Reply #2 on: March 10, 2011, 05:22:18 pm »
he claims 1MW yes mega watt for 100ns

i am not sure a laser diode will do that
eecs guy
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #3 on: March 10, 2011, 06:46:53 pm »
Thats an Nd:Yag laser (1064 nm is the giveaway).  No diode.
-Time
 

Offline johnmx

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Re: Good Bye Beautiful Eyes
« Reply #4 on: March 10, 2011, 06:50:06 pm »
It’s possible but hard to believe for a small portable gun. I would like to know how he measured the peak power.

Wikipedia source about ‘Nd:YAG lasers’:
“In this Q-switched mode, output powers of 250 megawatts and pulse durations of 10 to 25 nanoseconds have been achieved.[4]
[4]^ Solid-state laser engineering by Walter Koechner - Springer-Verlag 1965 Page 507”
Best regards,
johnmx
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #5 on: March 10, 2011, 06:52:37 pm »
Probably a passive q-switch that triggers at some threshold once sufficient lasing has occured.  You know this threshold for your q-switch so you know the power output.
« Last Edit: March 10, 2011, 06:55:30 pm by Time »
-Time
 

Offline Sionyn

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Re: Good Bye Beautiful Eyes
« Reply #6 on: March 10, 2011, 07:21:55 pm »
yer stupid me :D
eecs guy
 

Alex

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Re: Good Bye Beautiful Eyes
« Reply #7 on: March 10, 2011, 07:27:43 pm »
he claims 1MW yes mega watt for 100ns
i am not sure a laser diode will do that

Ah, the pulsed laser marketing trap.

Power = Energy / Time

It is 1MW because the energy is delivered in 100ns. Power is meaningless for pulsed lasers. Energy is used instead. I feel sorry for all the accidents that will happen from using this to pop balloons.

Here is a picture of a, 375 MW (wohooo, 375 MW!) YAG laser taken this afternoon.


« Last Edit: March 10, 2011, 07:29:24 pm by Alex »
 

Offline Sionyn

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Re: Good Bye Beautiful Eyes
« Reply #8 on: March 10, 2011, 08:27:19 pm »
T.E.A laser i bet this thing makes ozone

eecs guy
 

Offline Wim_L

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Re: Good Bye Beautiful Eyes
« Reply #9 on: March 10, 2011, 10:23:36 pm »
Yes, pulse energies are the more useful way to describe it. I've seen (and worked with) some other types of lasers that could get several gigawatts of peak power, but only for a few tens of femtoseconds. Pulse energies were a few millijoules at most. Still, those things are pretty destructive, if somewhat inefficient.

A common laboratory and industry version of Nd:YAG lasers will put out pulses of about one joule with a repetition frequency between 10 and 100 hertz. Fairly dangerous devices, as even diffuse scattering from nearby surfaces can cause eye damage. Direct beam illumination (even unfocused) tends to destroy anything not specifically designed to withstand this kind of abuse. These Nd:YAG systems do seem more likely to simply tunnel through a target without setting it on fire than faster pulsed or continuous wave lasers though. I've seen one "burn" 20 cm straight through a big roll of paper without igniting it.
 

Offline glossywhite

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Re: Good Bye Beautiful Eyes
« Reply #10 on: March 10, 2011, 11:22:08 pm »
The fact it is formed into a gun shape is just stupid. This encourages people to treat it like a toy. There should be laws that prevent possesion of items such as this, and the people with them should have them confiscated. Yet, in crazyland America, it is as simple as buying a cheeseburger to own a gun? The world is a mess, and responsibilities have been abandoned.

I am not joking.
« Last Edit: March 10, 2011, 11:23:43 pm by glossywhite »
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #11 on: March 10, 2011, 11:36:07 pm »
So are you trying to hijack this thread and discuss social issues?
-Time
 

Offline glossywhite

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Re: Good Bye Beautiful Eyes
« Reply #12 on: March 10, 2011, 11:40:55 pm »
So are you trying to hijack this thread and discuss social issues?
Sorry? An opinion is considered "hijacking"? I think not, and you are free to disagree.
 

Alex

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Re: Good Bye Beautiful Eyes
« Reply #13 on: March 11, 2011, 12:41:58 am »
All it needs now is a motorised mount, a high resolution camera and a fly tracker software. Zap
 

Offline Kiriakos-GR

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Re: Good Bye Beautiful Eyes
« Reply #14 on: March 11, 2011, 01:20:00 am »
All it needs now is a motorised mount, a high resolution camera and a fly tracker software. Zap

No way ...   :D 

even if it ever works , no one could even sleep in the same room with it. 
 

Offline kaptain_zero

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Re: Good Bye Beautiful Eyes
« Reply #15 on: March 11, 2011, 01:39:10 am »
How NOT to use a laser, as in the local news today:

Green Laser pointed at Police Helicopter.
 

Alex

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Re: Good Bye Beautiful Eyes
« Reply #16 on: March 11, 2011, 01:42:19 am »
An excellent excuse not to get out of bed to go to work.

"Sorry boss, I cant give an estimate when i will be on site, the YAG turret is online."

Oh no! I almost forgot! We need flies now...stick them in a 'microbial fuel-cell'. Sorry Sionyn, this derails the topic by 180deg.

Man Eating Robots In Our Future

Edit: That guy looks like a pothead. "I didn't realise it was that dangerous" "My 99c LASER almost took out a helicopter". What a tard. They did that to a passenger plane too, but it had just landed not in the air.
« Last Edit: March 11, 2011, 01:47:12 am by Alex »
 

Offline Mechatrommer

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Re: Good Bye Beautiful Eyes
« Reply #17 on: March 11, 2011, 02:07:45 am »
Pt = E, 1MW x 100ns = 0.1J
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 

Offline tyblu

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Re: Good Bye Beautiful Eyes
« Reply #18 on: March 11, 2011, 03:21:45 am »
This is pretty freaking sweet. Difficult to imagine this fella having the know-how to build this, but can't spell worth a sh!t -- still impressive!
Tyler Lucas, electronics hobbyist
 

Offline Kiriakos-GR

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Re: Good Bye Beautiful Eyes
« Reply #19 on: March 11, 2011, 03:26:00 am »
How NOT to use a laser, as in the local news today:

Green Laser pointed at Police Helicopter.

I did the same thing before 30 years , with an common flashlight on an Army Helicopter , actually I was using the mors-code button, and so it was not an stable beam,
even so it did attract the attention of the pilot , and the distance was less than 100 meters, and he did came over the area that i was,
so to find out what was it..
I was hidden under one huge Excavator ..  :D
There was an army air base near to my home, yes army helicopters ..  ( they did lots of exercises and they was flying like 4 or 8 or more together ) I will never forget the sound of their engines , and that in our home, anything made from glass, it was dancing , when they was flying above our homes.
It moved away before 20 years, and so its just a memory .
« Last Edit: March 11, 2011, 03:32:22 am by Kiriakos-GR »
 

Offline the_raptor

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Re: Good Bye Beautiful Eyes
« Reply #20 on: March 11, 2011, 03:41:52 am »
The world is a mess, and responsibilities have been abandoned.

Actually abdicating personal and corporate defence to the state is an abandonment of responsibility.

Also the typical "pen" style laser has been abused as much as possible so I fail to see what difference the shape of the device actually makes.
 

Offline tyblu

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Re: Good Bye Beautiful Eyes
« Reply #21 on: March 11, 2011, 07:18:10 am »
I have one of those powerful green lasers. Difficult to suppress the desire to point it randomly...
Tyler Lucas, electronics hobbyist
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #22 on: March 11, 2011, 07:34:38 am »
On that topic, where can you get one of these lasers from? I have another interesting project idea. It's doubtful I'll actually get around to it though. Also, does anyone know of any proper laser safety courses that I could take?
« Last Edit: March 11, 2011, 07:36:31 am by Lance »
 #include "main.h"
  #include <pic.h>
// #include <killallhumans.h>
 

Offline the_raptor

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Re: Good Bye Beautiful Eyes
« Reply #23 on: March 11, 2011, 09:14:29 am »
Laser safety breaks down to:
1) Wear googles that block the specific wavelength/s your laser uses.
2) Do not point at people or animals.
3) Do not look at laser with remaining eye.
 

Online Psi

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Re: Good Bye Beautiful Eyes
« Reply #24 on: March 11, 2011, 10:06:23 am »
Greek letter 'Psi' (not Pounds per Square Inch)
 


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