Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Laser Shows



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 09-03-2009, 11:27 PM #1
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Paint the Moon???

did anyone participate in this crazy idea last time??

Paint the Moon

given the fact that our moon wasn't obliterated I'm guessing noone from LPF joined the effort?? lol!


cyclonite is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 09-03-2009, 11:33 PM #2
game-genie's Avatar
Class 1M Laser
 
Join Date: Dec 2008
Location: Europe - Austria
Posts: 199
Rep Power: 9
game-genie is on a distinguished road
Send a message via ICQ to game-genie Send a message via Skype™ to game-genie
game-genie game-genie is offline
Class 1M Laser
game-genie's Avatar
 
Join Date: Dec 2008
Location: Europe - Austria
Posts: 199
Rep Power: 9
game-genie is on a distinguished road
Send a message via ICQ to game-genie Send a message via Skype™ to game-genie
Default Re: Paint the Moon???

If you shoot the mirrors on the moon with a (pulsed) multiple kW laser and optics worth an arm and a leg you only get about 30-50 photons back.
:P

game
__________________
game-genie is offline   Reply With Quote
Old 09-04-2009, 12:27 AM #3
ZRTMWA's Avatar
Class 3R Laser
 
Join Date: Jun 2009
Location: Maryland
Posts: 1,320
Rep Power: 29
ZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant future
ZRTMWA ZRTMWA is offline
Class 3R Laser
ZRTMWA's Avatar
 
Join Date: Jun 2009
Location: Maryland
Posts: 1,320
Rep Power: 29
ZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant futureZRTMWA has a brilliant future
Default Re: Paint the Moon???

No way it would work, especially not with the "inexspensive yet surprisingly powerful" red lasers.
ZRTMWA is offline   Reply With Quote
Old 09-04-2009, 12:34 AM #4
DuramaxDiesel02's Avatar
Member
 
Join Date: Sep 2009
Location: Daguins attic
Posts: 30
Rep Power: 0
DuramaxDiesel02 is infamous around these partsDuramaxDiesel02 is infamous around these parts
DuramaxDiesel02 DuramaxDiesel02 is offline
Member
DuramaxDiesel02's Avatar
 
Join Date: Sep 2009
Location: Daguins attic
Posts: 30
Rep Power: 0
DuramaxDiesel02 is infamous around these partsDuramaxDiesel02 is infamous around these parts
Default Re: Paint the Moon???

hmmm something tells me this would be very hard to do.
__________________
You may of known me as "Ska8r411"



Wicked lasers 15mw
Daguins Sonar II Burner 165mW of Blu Ray !
1W Arctic From WickedLasers---Yes its a light saber.
DuramaxDiesel02 is offline   Reply With Quote
Old 09-04-2009, 06:02 AM #5
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 1100
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Things Things is offline
Class 4 Laser
 
Join Date: May 2007
Location: Queensland, AU
Posts: 7,549
Rep Power: 1100
Things has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond reputeThings has a reputation beyond repute
Default Re: Paint the Moon???

Extremely. Ideally if space was a clean vacuum, the laser beam would travel forever. However it's not (space junk, our atmosphere etc) so our lasers would barely make it to the moon, let alone back :P

On Mythbusters they fired a multi kW laser at the moon, and as GJ said, they only got a few photons back, even when it was bouncing off a reflector up there!
Things is offline   Reply With Quote
Old 09-04-2009, 09:52 AM #6
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: Paint the Moon???

Yeah Neil Amstrong and Buzz Aldrin left a few mirrors on the surface during Apollo 11. Today scientists bounce lasers off them to measure the distance between the moon and earth however in practice it's extremely hard to do. They spend ages trying to hit the mirrors with very expensive optics and only get real measurements once in a while.

Anyway in order for the red dot to be visible, the reflection needs to be brighter than the reflection of the sun on the moon's surface. The sun on the moon's surface is much brighter than on earth because the moon has no atmosphere.
cyclonite is offline   Reply With Quote
Old 09-04-2009, 11:39 AM #7
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Paint the Moon???

Even as a big group attempt it would be very difficult to produce a visible result.

The dot need not be brighter than the suns reflection: you'd attempt a thing like this on the dark side of the moon, ideally in a new-moon night so that you dont get blinded by the lit side.

In theory, it would work provided you used enough lasers... even if you hit just the surface and it scatters off randomly from there (not using the retroreflectors). The question remains: how many lasers would it take?

Sigar-box math:

- it would take at least several watt/m2 over a large area to be visible on the new moon.

- 1 mrad divergence laser, would light a circular area with 400 km diameter (!), which is a good portion of the size of the lunar surface facing us (its diameter is ca 3500 km).

- a 400 km diameter circle has a surface of 125.000 km2, or 125 billion m2.

- to light this area up with 10 w/m2, it would take 125 trillion watts of laser power

- 625 trillion dilda's would make it possible, provided every person on earth would be able to point 100.000 dilda's at the same area of the moon simultaniously.

Sigar-box conclusion:

It will not work unless we invest all of the earths resources into producing dilda's and batteries, and breed a lot more people to point them ;p
Benm is online now   Reply With Quote
Old 09-04-2009, 01:04 PM #8
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: Paint the Moon???

wow very helpful explanation and math there. thanks. there was a mention at one point of Google's interest in using lasers to advertise on the moon. not sure if it was a hoax but if it wasn't, it probably wasn't feasible either.
cyclonite is offline   Reply With Quote
Old 09-04-2009, 02:26 PM #9
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Talking Re: Paint the Moon???

@ Benm: Then just DIY 200 trillion watts scanner and use it, right ? (j/k )
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 09-04-2009, 03:08 PM #10
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Paint the Moon???

Hmm.. i do wonder how many digits fit on the power bill, but somehow i dont want to find out

As for advertising in space: The moon would not be very practical. One could launch a slightly diffusing retroreflective (like traffic signs) sheet into low orbit, and laser paint onto that. At a distance of just a few 100 km, this would be entirely feasible in terms of being visible using existing, available laser technology.

The downside is that the sheet would have to be rather large to display a legible message. If you put it at 300 km orbit (similar to ISS), it would have to be a few km in size to appear the same size as the moon. I suppose a 5x25 km sheet would be large enough to display a few words on that you could read from the ground.

Still it will not work by aiming a few dilda's at it, but i suppose you'd have a fair chance using a 40W DPSS illuminator with a telescope-sized beam expander behind it. The majority of costs here would be launching the sheet, not the laser and optics to write in the sky
Benm is online now   Reply With Quote
Old 09-04-2009, 03:59 PM #11
HIMNL9's Avatar
Class 4 Laser
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
HIMNL9 HIMNL9 is offline
Class 4 Laser
HIMNL9's Avatar
 
Join Date: May 2009
Location: Lost somewhere in the EU mess ;)
Posts: 5,416
Rep Power: 404
HIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond reputeHIMNL9 has a reputation beyond repute
Default Re: Paint the Moon???

Artificial clouds made using refractive fluids (or mixed with fluoresceine, for fluo effects ) can work too ..... there's only one problem, with them ..... when these clouds filled of chemicals rain down, someone can hate you :P

Natural clouds, if compacts, are better
__________________
High Impulse Multipath Neutron Laser (mark 9 ) (LOL)
Dare mo mita koto no nai, kaze, kumo, suna, umi ..... Kokoro no hate no doko ka eien ga kagayaku.
HIMNL9 is offline   Reply With Quote
Old 09-04-2009, 06:52 PM #12
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
cyclonite cyclonite is offline
Class 2 Laser
 
Join Date: Sep 2007
Posts: 304
Rep Power: 11
cyclonite will become famous soon enough
Default Re: Paint the Moon???

Benm: There's too much atmospheric drag at 100km. If we place a sheet in LEO at 300km, the sheet would orbit the earth at 25,000km/hour like the ISS. At that speed the real challenge would be tracking it with the laser
cyclonite is offline   Reply With Quote
Old 09-04-2009, 10:45 PM #13
game-genie's Avatar
Class 1M Laser
 
Join Date: Dec 2008
Location: Europe - Austria
Posts: 199
Rep Power: 9
game-genie is on a distinguished road
Send a message via ICQ to game-genie Send a message via Skype™ to game-genie
game-genie game-genie is offline
Class 1M Laser
game-genie's Avatar
 
Join Date: Dec 2008
Location: Europe - Austria
Posts: 199
Rep Power: 9
game-genie is on a distinguished road
Send a message via ICQ to game-genie Send a message via Skype™ to game-genie
Default Re: Paint the Moon???

I am LMAO this thread is getting really funny xD
__________________
game-genie is offline   Reply With Quote
Old 09-04-2009, 11:29 PM #14
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is online now
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,428
Rep Power: 15904
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Paint the Moon???

Oh, there would be huge problems with its practical application - such a sheet would sweep over in brief periods, and shoot across the sky to both observer and the laser tracking it... but these things can be done with current technology.

To get a fixed point in the sky, it would have to be geostationary, increasing the distance to 36.000 km. Even with retroreflective coatings, the thing would have to be huge (100x100s of kilometers), and it would take a lot more power and focussing to work with. The cost of all this would be insane.

So, laser message on LEO bilboard: feasible, in GEO not affordable, on the moon, not possible
Benm is online now   Reply With Quote
Old 09-05-2009, 05:23 AM #15
Spyderz20x6's Avatar
Class 3B Laser
 
Join Date: Nov 2007
Location: Redmond, WA
Posts: 2,756
Rep Power: 126
Spyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond repute
Send a message via MSN to Spyderz20x6
Spyderz20x6 Spyderz20x6 is offline
Class 3B Laser
Spyderz20x6's Avatar
 
Join Date: Nov 2007
Location: Redmond, WA
Posts: 2,756
Rep Power: 126
Spyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond reputeSpyderz20x6 has a reputation beyond repute
Send a message via MSN to Spyderz20x6
Default Re: Paint the Moon???

There are just so many factors that go against you, which make this project impossible.
__________________
Spyderz20x6

The Copperhead: 330mW Copper Heatsinked Pocket Pal w/ Meredith Glass Lens and Open Can Diode! See Here
1x 20x 650nm 250mW Burning Mini Laser
1x 20X Open Can 280mW Mini Pocket Burner in 4" Host
1x DX 532nm 10mW Laser
1x 780nm NIR Dorcy Jr. 250mW Laser
KES-400A PS3 405nm Blu-Ray 10mW
PHR-803T Mini 4 inch 405nm Blu-Ray 140mW

Are you a beginner, wanting to build a DIY laser, but do not have a clue about how? Well, then look here!


"its cool dont worrie about it its under controle"
-Jake21, 2009
Spyderz20x6 is offline   Reply With Quote
Old 09-05-2009, 05:52 AM #16
scopeguy20's Avatar
Class 3B Laser
 
Join Date: Jun 2007
Location: Sunny S. California WOOT!
Posts: 3,447
Rep Power: 252
scopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond repute
scopeguy20 scopeguy20 is online now
Class 3B Laser
scopeguy20's Avatar
 
Join Date: Jun 2007
Location: Sunny S. California WOOT!
Posts: 3,447
Rep Power: 252
scopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond reputescopeguy20 has a reputation beyond repute
Default Re: Paint the Moon???

Crazy folks, but it actually would work the other way around, if all the green lasers on the PLANET WERE ON THE MOON, AND POINTED AT YOU! LOL! -GH
__________________
Bluray 140 mW, DJR & New FAV! 8X >500 mW Cree! Made by IgorT Flaminpyro BR &
Red Burner on board, need more ~650 nm 140 mW
8 red Hene's 632.8 nm 2-3mW green HeNe & T/Y to rhd 635nm ~400mW
Rigel SOLD! 3-4 mW I Love it PGL III 593.5nm doing >20 mW! SOLD!
Several Green lasers, EVO PRO Peak ~160 mW & Spyder I Peak 295 mW are my new green favorites!
LG Aquarius -10 & Viasho 473 nm peak ~29 mW WL S3 >60 mW peak 112mW SOLD!
Awesome rhd 451nm 2.1 W SOLD! & 445 >2W by DTR! , Yobresal 1.2W Cree & pen 445 w/ star-cap doing 750 mW!! 500mW 445nm Dorcy Jr. Thanks to Flaminpyro!
Awesome Osram 450nm pocket mini from DTR does about 750mW!

Big T/Y! to builders: IgorT, DTR, john lawson, jayrob, IgorT, whatsupadrian, daguin, and all!
Spiro toy mod w/ side aperture for any pointer Spiro toy in Violet Spiro by yobresal too!
Laser sleds/ diodes sold so far 1180+ A few LPC-826 diodes F.S. $12 ea.


scopeguy20 is online now   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











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 05:12 AM.


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