Old 07-12-2009, 09:13 PM #1
zxn474l's Avatar
Class 1M Laser
 
Join Date: Jan 2009
Posts: 204
Rep Power: 12
zxn474l has a spectacular aura aboutzxn474l has a spectacular aura aboutzxn474l has a spectacular aura about
zxn474l zxn474l is offline
Class 1M Laser
zxn474l's Avatar
 
Join Date: Jan 2009
Posts: 204
Rep Power: 12
zxn474l has a spectacular aura aboutzxn474l has a spectacular aura aboutzxn474l has a spectacular aura about
Cool 3D laser images in mid air no screen!

Did anyone watch nation geographical channel last thursday night on "pirotechnics" because at the end of it they interviewed a japaneese company that sucessfully was able to produce muliple 3D images in mid air using no "screen" to prodject these images and is the only country in the world to be able to get a laser to focus it's focal point in mid air without the "beam coninuing past it's focal point! AMAZING! In theory using this technology you could then make a real "light saber!" STAR WARS is here my friends!


zxn474l is offline   Reply With Quote


















Old 07-12-2009, 09:32 PM #2
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Laser_Ben Laser_Ben is offline
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Default Re: 3D laser images in mid air no screen!

Quote:
Originally Posted by zxn474l View Post
Did anyone watch nation geographical channel last thursday night on "pirotechnics" because at the end of it they interviewed a japaneese company that sucessfully was able to produce muliple 3D images in mid air using no "screen" to prodject these images and is the only country in the world to be able to get a laser to focus it's focal point in mid air without the "beam coninuing past it's focal point! AMAZING! In theory using this technology you could then make a real "light saber!" STAR WARS is here my friends!
This is a very simple trick that has been around for a long time. Because of the high peak powers of Q-Switched lasers, they can produce a plasma in the air due to the concentrated local heating. This plasma will disturb the beams propagation causing it to scatter. All this company did was to put a setup with a XYZ scanning system in front of a Q-Switched laser with a high repetition rate. The XY will position the angle of the beam while the Z axis consists of a fast moving lens to change the focal point of the laser.

This kind of setup is not practical for anything besides demonstrating it can be done. It is far to dangerous and costly to do this on any sort of consumer level product. The scattered light alone is enough to blind anyone directly viewing the system who is not wearing protective eyewear.

We have done this experiment at work with the pulsed Continuum PV mode locked system we have. It has a high enough peak power that it can create a plasma without any focusing. For this reason, most high energy beams are only used within a vacuum or a ultrapure gas such as dry nitrogen.
Laser_Ben is offline   Reply With Quote
Old 07-12-2009, 10:27 PM #3
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

Wouldn't "eye-safe"wavelengths be the best choice for this? Or are the powers just so high that it will burn anything no matter what?
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote
Old 07-12-2009, 10:53 PM #4
randomlugia's Avatar
Class 3R Laser
 
Join Date: Sep 2008
Location: Williamsport, MD
Posts: 1,808
Rep Power: 112
randomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond repute
randomlugia randomlugia is offline
Class 3R Laser
randomlugia's Avatar
 
Join Date: Sep 2008
Location: Williamsport, MD
Posts: 1,808
Rep Power: 112
randomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond reputerandomlugia has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

As far as I know, no visible wavelength is "eye safe".

And also, most of the light is turned into plasma. Plasma doesn't have a wavelength, does it?
__________________
Laser Addict---Audiophile---Knife Nut
randomlugia is offline   Reply With Quote
Old 07-12-2009, 11:27 PM #5
BuildAbluraylaser's Avatar
Class 2M Laser
 
Join Date: Mar 2009
Location: Montreal, Quebec, Canada
Posts: 881
Rep Power: 80
BuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond repute
BuildAbluraylaser BuildAbluraylaser is offline
Class 2M Laser
BuildAbluraylaser's Avatar
 
Join Date: Mar 2009
Location: Montreal, Quebec, Canada
Posts: 881
Rep Power: 80
BuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond reputeBuildAbluraylaser has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

to randomlugia:

Plasma is the 4th state of matter, so it can't have a wavelength; but, one of its caracteristic is that atoms, because of their very excited state, will release photons; and I think that the atoms excitement state can influence the photon's wavelength.

But that I'm not sure.


Random gun
__________________


Visit my photography thread! (link)

Last edited by BuildAbluraylaser; 07-12-2009 at 11:28 PM. Reason: f***ing errors
BuildAbluraylaser is offline   Reply With Quote
Old 07-13-2009, 12:04 AM #6
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Laser_Ben Laser_Ben is offline
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Default Re: 3D laser images in mid air no screen!

At these powers, the energies will burn your cornea before then even reach the retina. There are eye safe wavelengths, however they are not available in high enough powers.

In any gas laser, you have a plasma, it is emitting photons which you see as a color. Depending on the atomic transitions of the gas, it emits different wavelengths.
Laser_Ben is offline   Reply With Quote
Old 07-13-2009, 06:21 AM #7
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

Quote:
Originally Posted by randomlugia View Post
As far as I know, no visible wavelength is "eye safe".

And also, most of the light is turned into plasma. Plasma doesn't have a wavelength, does it?
It's not necessary for the laser to be visible in order to create plasma points in the air.. in fact, I think such a system would work best with invisible lasers.
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote
Old 07-13-2009, 04:40 PM #8
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Hallucynogenyc Hallucynogenyc is offline
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Default Re: 3D laser images in mid air no screen!

this really sounds amazing, but however there's a point I don't get.

For a laser to create plamsa in the air the air must absorb the laser energy, and I thought gases weren't absorbing the light!

Do they?

Yours,
Albert
__________________
The difference between an ignorant and a wise is that the wise knows the limits of his knowledge while the ignorant ignores the limits of his ignorance.
Learn how to use Opera and tell me about your experience here!


Wicked Lasers Evolution Pro 130mW ------------------> Review
Rayfoss 150mW waterproof
Rayfoss 200mW focusable torch -----------------------> Review
Dealextreme 5mW true laser pointer
Dealextreme 50mW true laser pointer
Dealextreme 100mW true laser pointer
Laserlands 30mW disco laser --------------------------> Review
5mW pointers (many of them)
DX 200mW Red laser (Dilda) --------------------------> Review
120mW PHR custom build
200mW GGW custom build

Focalprice 7$ green&bluray laser goggles
Dealextreme tripod and clamp for laser holding -----> Review
DIY 3 motor Spirograph --------------------------------> Review
HLPM-2 laser power meter
Hallucynogenyc is offline   Reply With Quote
Old 07-13-2009, 05:04 PM #9
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

If there is enough power density, then they have little choice but to absorb at least some of the energy.
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote
Old 07-13-2009, 06:12 PM #10
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Hallucynogenyc Hallucynogenyc is offline
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Default Re: 3D laser images in mid air no screen!

but even if air absorb a very very little amount of light, then how comes we for example can see the stars? Even if there are very few gases on the space there are some, and if they are really absorbing light, then how comes we can see them?

I'm really astonished about this.

Yours,
Albert
__________________
The difference between an ignorant and a wise is that the wise knows the limits of his knowledge while the ignorant ignores the limits of his ignorance.
Learn how to use Opera and tell me about your experience here!


Wicked Lasers Evolution Pro 130mW ------------------> Review
Rayfoss 150mW waterproof
Rayfoss 200mW focusable torch -----------------------> Review
Dealextreme 5mW true laser pointer
Dealextreme 50mW true laser pointer
Dealextreme 100mW true laser pointer
Laserlands 30mW disco laser --------------------------> Review
5mW pointers (many of them)
DX 200mW Red laser (Dilda) --------------------------> Review
120mW PHR custom build
200mW GGW custom build

Focalprice 7$ green&bluray laser goggles
Dealextreme tripod and clamp for laser holding -----> Review
DIY 3 motor Spirograph --------------------------------> Review
HLPM-2 laser power meter
Hallucynogenyc is offline   Reply With Quote
Old 07-14-2009, 01:39 AM #11
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

To be honest, absorbed isn't really the right word. If you have a powerful enough laser, and you focus all of it's power to a point, then at that point the power density will often be enough to actually ionize the air and cause a light discharge accompanied by a snap of noise.. Lightning does the same thing, this is why it emits light and thunder, but it is caused by electrical energy ionizing the air molecules instead of photons in the case of lasers.. you could say it's photonic lightning in a way.
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote
Old 07-14-2009, 01:45 AM #12
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,271
Rep Power: 1754652
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is offline
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,271
Rep Power: 1754652
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

I have observed my SSY-1 1064 nM Q switched laser make momentary plasma bursts using a 3" FL lens. Yes it damaged the lens but it was neet to actually see.

Mike
__________________
WOWZERS!
Hemlock_Mike is offline   Reply With Quote
Old 07-14-2009, 01:50 AM #13
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
ElektroFreak ElektroFreak is offline
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,728
Rep Power: 3030
ElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond reputeElektroFreak has a reputation beyond repute
Default Re: 3D laser images in mid air no screen!

I'll bet.. I've never seen it with my own eyes, and it would be pretty awesome to do it with one of my lasers, but I don't have anywhere near that much power..
__________________
Laser Resources (for n00bs and veterans alike!)

Sam's Laser FAQ (The Laser Bible)

http://www.repairfaq.org/sam/laserfaq.htm

RP Photonics Encyclopedia of Laser Physics and Technology

http://www.rp-photonics.com/encyclopedia.html

ULTIMATE DIY PROJECTOR REFERENCE

http://nqlasers.com/scannerreference...itle=Main_Page

SUCCESS is the best revenge.
ElektroFreak is offline   Reply With Quote
Old 07-14-2009, 03:55 AM #14
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Laser_Ben Laser_Ben is offline
Banned
 
Join Date: Apr 2007
Location: Cupertino CA
Posts: 1,076
Rep Power: 0
Laser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond reputeLaser_Ben has a reputation beyond repute
Send a message via AIM to Laser_Ben
Default Re: 3D laser images in mid air no screen!

As asked earlier, yes, air does absorb some light. This is why you would be able to see many more stars in space then on the ground. While this amount is very very small, when you have enough energy density at a single point, it will reach the breakdown point of air.

Another good example of why it happens, why do you think the air is so hot on a sunny day. Part of it is from the ground absorbing the light and making heat, but another bit of it is from the air absorbing the light.
Laser_Ben is offline   Reply With Quote
Old 07-14-2009, 01:05 PM #15
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Hallucynogenyc Hallucynogenyc is offline
Class 3B Laser
 
Join Date: Jan 2009
Location: Spain, tarragona
Posts: 3,635
Rep Power: 220
Hallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond reputeHallucynogenyc has a reputation beyond repute
Send a message via MSN to Hallucynogenyc
Default Re: 3D laser images in mid air no screen!

Quote:
Originally Posted by Laser_Ben View Post
As asked earlier, yes, air does absorb some light. This is why you would be able to see many more stars in space then on the ground. While this amount is very very small, when you have enough energy density at a single point, it will reach the breakdown point of air.

Another good example of why it happens, why do you think the air is so hot on a sunny day. Part of it is from the ground absorbing the light and making heat, but another bit of it is from the air absorbing the light.
This and the thunder explanation helped me a lot Rep for both!
__________________
The difference between an ignorant and a wise is that the wise knows the limits of his knowledge while the ignorant ignores the limits of his ignorance.
Learn how to use Opera and tell me about your experience here!


Wicked Lasers Evolution Pro 130mW ------------------> Review
Rayfoss 150mW waterproof
Rayfoss 200mW focusable torch -----------------------> Review
Dealextreme 5mW true laser pointer
Dealextreme 50mW true laser pointer
Dealextreme 100mW true laser pointer
Laserlands 30mW disco laser --------------------------> Review
5mW pointers (many of them)
DX 200mW Red laser (Dilda) --------------------------> Review
120mW PHR custom build
200mW GGW custom build

Focalprice 7$ green&bluray laser goggles
Dealextreme tripod and clamp for laser holding -----> Review
DIY 3 motor Spirograph --------------------------------> Review
HLPM-2 laser power meter
Hallucynogenyc is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 01:30 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC