Author Topic: Good Bye Beautiful Eyes  (Read 17168 times)

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Alex

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Re: Good Bye Beautiful Eyes
« Reply #25 on: March 11, 2011, 10:11:05 pm »
I got such a laser during a visit to China. Unlike normal high-power lasers, that turned out to be a normal green laser pointer with its current source set to a ridiculous current. It only lasted for a day or two...go figure. You can build your own, I have seen HeNe, Nitrogen, CO2 lasers as well as YAG and sapphire crystals on ebay.

Speaking of eyes, here is a 'proper' eye diagram on a Hameg scope. X-Y mode, AM sine wave through capacitor. Look what engineers do at 1:42 am!  ::)

 

Offline Psi

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Re: Good Bye Beautiful Eyes
« Reply #26 on: March 11, 2011, 10:46:08 pm »
i like this one
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Offline glossywhite

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Re: Good Bye Beautiful Eyes
« Reply #27 on: March 12, 2011, 12:56:43 am »
I got such a laser during a visit to China. Unlike normal high-power lasers, that turned out to be a normal green laser pointer with its current source set to a ridiculous current. It only lasted for a day or two...go figure. You can build your own, I have seen HeNe, Nitrogen, CO2 lasers as well as YAG and sapphire crystals on ebay.

Speaking of eyes, here is a 'proper' eye diagram on a Hameg scope. X-Y mode, AM sine wave through capacitor. Look what engineers do at 1:42 am!  ::)



I'm not certain in which context you are asking us to "go figure". If it is in the context of "well work THAT out if ya can...", then it is pretty obvious - the laser diode was running over-current, and burned out. Simple.
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #28 on: March 12, 2011, 02:29:00 am »
I'm not certain in which context you are asking us to "go figure". If it is in the context of "well work THAT out if ya can...", then it is pretty obvious - the laser diode was running over-current, and burned out. Simple.

'Go figure' is just a figure of speech or expression.
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Offline glossywhite

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Re: Good Bye Beautiful Eyes
« Reply #29 on: March 12, 2011, 03:14:31 am »
I'm not certain in which context you are asking us to "go figure". If it is in the context of "well work THAT out if ya can...", then it is pretty obvious - the laser diode was running over-current, and burned out. Simple.

'Go figure' is just a figure of speech or expression.

Did you even read "in which context"? I know it is an expression. That was as obvious as the very reason the diode burned out!
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #30 on: March 12, 2011, 03:51:31 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.
Well those are the more obvious ones. Is there anything not obvious that is good to know?

Are there any companies that are well known for their safety gear? Also, what companies do you think would be a "better" choice for getting laser diodes or lasers like the one this fellow used in the original post video?
« Last Edit: March 12, 2011, 03:53:18 am by Lance »
#include "main.h"
#include <pic.h>
//#include <killallhumans.h>
 

Offline Time

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-Time
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #32 on: March 12, 2011, 04:15:49 am »
http://www.kenteklaserstore.com/

http://www.thorlabs.com/
Thanks, these places look pretty good. Though they're pricey. 600 dollars for half a milliwatt! I wonder how much one of those Nd:YAG lasers costs.
« Last Edit: March 12, 2011, 04:19:02 am by Lance »
#include "main.h"
#include <pic.h>
//#include <killallhumans.h>
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #33 on: March 12, 2011, 04:26:28 am »
This is laboratory/science grade stuff.  You can rip the laser diode out of a computer and make a pretty powerful CW laser.

-Time
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #34 on: March 12, 2011, 04:31:23 am »
This is laboratory/science grade stuff.  You can rip the laser diode out of a computer and make a pretty powerful CW laser.


I see, so where would I go to get laser diodes like the ones used in CD drives, or lasers like the one the guy used to make the gun? I found a nice selection of diodes on digikey.
#include "main.h"
#include <pic.h>
//#include <killallhumans.h>
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #35 on: March 12, 2011, 04:35:06 am »
Nd:YAG laser heads probably are not cheap. 

You are probably better off just salvaging the diode from a CD drive.  Maybe goto a flea market or pawn shop and buy an old PC.  It would be interesting to rig up some kind of pulsed supply to that cd-rom diode and see what kind of intensities you could get.
-Time
 

Offline Zero999

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Re: Good Bye Beautiful Eyes
« Reply #36 on: March 12, 2011, 05:36:11 am »
'Go figure' is just a figure of speech or expression.
What does it mean?

It must me an Americanism.

 

Offline Sionyn

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Re: Good Bye Beautiful Eyes
« Reply #37 on: March 12, 2011, 05:48:46 am »
eecs guy
 

Offline Time

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Re: Good Bye Beautiful Eyes
« Reply #38 on: March 12, 2011, 05:54:43 am »
Its something you say when the unexpected has occured but is commonly used with sarcasm.  Such as this situation.
-Time
 

Offline Sionyn

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Re: Good Bye Beautiful Eyes
« Reply #39 on: March 12, 2011, 09:33:40 am »


eecs guy
 

Alex

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Re: Good Bye Beautiful Eyes
« Reply #40 on: March 12, 2011, 11:11:43 am »
"Mosquito smoke, don't breath this!"  :D

Broadly speaking it is used to stress a point usually with a hint of irony.

Go figure back there meant: 'duh...the Chinese masterminds did it again, they managed to make a device that works for only a few minutes after it is sold'.
 

Offline tyblu

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Re: Good Bye Beautiful Eyes
« Reply #41 on: March 12, 2011, 01:24:49 pm »
I've gotten some of the more hefty green lasers from http://www.dealextreme.com/
Don't think you can import to the USA.
Tyler Lucas, electronics hobbyist
 

Online Simon

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Re: Good Bye Beautiful Eyes
« Reply #42 on: March 14, 2011, 06:53:55 am »
To be honest I'd not like to see people (and that will include undiciplined kids in the UK) running around with one of those. That looks like it has some serious fire power for a portable device. I mean what happens if you shoot it at someone ? my guess is you seriously burn them and if you shoot a vital organ they may die on the spot ? I'm not familiar with lasers but that looks well leathal - but fun. I'd love to have one but then would I trust myself with one ?

there was also a case here in the UK where a guy blinded an airlie pilot by shooting at his plane with one of those small laser pointer thigs. People just don't under stand that they are not just a funny coloured torch
https://www.simonselectronics.co.uk/shop New stock now in of EEVblog 121GW and Brymen 235 Now selling a selection of Probe Master probes.

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Offline tyblu

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Re: Good Bye Beautiful Eyes
« Reply #43 on: March 14, 2011, 07:33:31 am »
our toys aren't going to get any safer. As tech advances, so does our requirements to educate society... Pretty sure we haven't gotten this right for the last 10'000 years, and probably won't anytime soon. Government control is not the way to go, as many good books have dramatized ;)
Tyler Lucas, electronics hobbyist
 

Online Mechatrommer

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Re: Good Bye Beautiful Eyes
« Reply #44 on: March 14, 2011, 07:35:58 am »
it will not burn, but create a hole. i saw this in "starwars" and "the core" movie.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
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Online Simon

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Re: Good Bye Beautiful Eyes
« Reply #45 on: March 14, 2011, 07:40:35 am »
sure but when kids with pellet guns are already a pain as they are not educated to not shoot at people then I'd not want to see them with such a device. We don't need goverment control we need discipline and for people to be held accountable. I don't know what UK law is like now but when i was a kid a parent was legally responsable for what their child got up to. These days kids commit murder and the parents are never put up as being partly to blame and are allowed to continue badly rearing the rest of their "clan".

Now give a kid something like that and there will be havoc, it is a firearm at best and should be treated as such. imagine what something like that would do if shot at a persons heart or head ? people will not understand that it is more than a fancy torch.
https://www.simonselectronics.co.uk/shop New stock now in of EEVblog 121GW and Brymen 235 Now selling a selection of Probe Master probes.

Also, if you want to get ripped off: https://www.ebay.co.uk/usr/simons_electronics?_trksid=p2047675.l2559
 

Offline Lance

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Re: Good Bye Beautiful Eyes
« Reply #46 on: March 14, 2011, 12:01:25 pm »
That would definitely blind someone, or cause a pretty severe burn. But it has a pretty small focal point. It's not like you could cook someone's arm with it.
#include "main.h"
#include <pic.h>
//#include <killallhumans.h>
 

Offline Psi

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Re: Good Bye Beautiful Eyes
« Reply #47 on: March 14, 2011, 05:43:45 pm »
it will not burn, but create a hole. i saw this in "starwars" and "the core" movie.


"The core" used a combination of lasers and pulsed ultrasonic waves to create the hole.
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Online Simon

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Re: Good Bye Beautiful Eyes
« Reply #48 on: March 14, 2011, 05:46:50 pm »
That would definitely blind someone, or cause a pretty severe burn. But it has a pretty small focal point. It's not like you could cook someone's arm with it.

no you would probably make a pin hole in yuor arm - a bit like a bullet
https://www.simonselectronics.co.uk/shop New stock now in of EEVblog 121GW and Brymen 235 Now selling a selection of Probe Master probes.

Also, if you want to get ripped off: https://www.ebay.co.uk/usr/simons_electronics?_trksid=p2047675.l2559
 

Online Mechatrommer

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Re: Good Bye Beautiful Eyes
« Reply #49 on: March 14, 2011, 06:29:24 pm »
But it has a pretty small focal point. It's not like you could cook someone's arm with it.
just enough to make you wonder why there is a small hole going through your arm, and a bit of itchy and numb feeling.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
Moving Forward to the Future, Breaking the GHz Barrier... (DDA5005)
 


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