Laser Pointers



Welcome to Laser Pointer Forums!

Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
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



Go Back   Laser Pointers > Lasers > General

Sci-Fi-Lasers
Reply
 
LinkBack Thread Tools Display Modes
Old 06-26-2009, 07:07 AM   #1
Class 1 Laser
 
Join Date: May 2009
Posts: 51
Rep Power: 0
superkai has a little shameless behaviour in the past
Talking silly question, How far can my 65mW 532nm go?!

hi guys, i just got my 65mW 532nm from o-like today, and i played it for a whille and im pretty shocked how bright the light beam is, compared to my phr 100mW, it seems so weak, but even tho it burns things way faster than the greenie, but i really like it, and i was pointing to the sky at night, at the first i saw there were few air planes so i decided to play it later, then later i went out again i was "shooting" around whereever i could point at, the stars, trees.....etc anyways i just wanna know how far can my 65mW go, it seemed pretty far, and does anyone know how high is the aircraft, i meant the attitude maybe, i think is around 6-9 km!! please let me know thanks

kai
superkai is offline   Reply With Quote


lpp

Green Laser Companies

Blue Laser Companies

Red Laser Companies


Old 06-26-2009, 08:19 AM   #2
Eku
Class 2 Laser
 
Eku's Avatar
 
Join Date: Apr 2009
Posts: 448
Rep Power: 7
Eku is on a distinguished road
Default Re: silly question, How far can my 65mW 532nm go?!

Think of it like this.

If your laser has 1 mrd it would get 1mm bigger for every meter it goes and when it leaves the laser it's 1mm.

So one km away it would be one meter wide.

So then take away the amount of power you'd lose from all the dust in the area and how big the dot is.

Then if the area of your eye that asorbs the light is 1cm and the dot is a meter wide and your laser is 100mw then 1km it would be 1mw to your eye or less.



Oh and lasers go forever .
__________________
Everytime you anti-troll god kills a troll. Troll below.

Last edited by Eku; 06-26-2009 at 08:36 AM.
Eku is offline   Reply With Quote
Old 06-26-2009, 01:39 PM   #3
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,736
Rep Power: 373
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: silly question, How far can my 65mW 532nm go?!

Quote:
Originally Posted by superkai View Post
hi guys, i just got my 65mW 532nm from o-like today, and i played it for a whille and im pretty shocked how bright the light beam is, compared to my phr 100mW, it seems so weak, but even tho it burns things way faster than the greenie, but i really like it, and i was pointing to the sky at night, at the first i saw there were few air planes so i decided to play it later, then later i went out again i was "shooting" around whereever i could point at, the stars, trees.....etc anyways i just wanna know how far can my 65mW go, it seemed pretty far, and does anyone know how high is the aircraft, i meant the attitude maybe, i think is around 6-9 km!! please let me know thanks

kai
That's the longest sentence in the world! congratulations!!
__________________
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 06-26-2009, 01:48 PM   #4
Class 2 Laser
 
sportcoupe's Avatar
 
Join Date: Aug 2008
Location: Georgia, USA
Posts: 361
Rep Power: 8
sportcoupe is on a distinguished road
Default Re: silly question, How far can my 65mW 532nm go?!

Commercial aircraft, the kind that carry many people from city to city, usually fly anywhere from 25,000 to 42,000 feet depending on airspace, traffic and desired route. Some private jets can fly up to 52,000 feet.
sportcoupe is offline   Reply With Quote
Old 06-26-2009, 02:32 PM   #5
Class 3R Laser
 
Jaseth's Avatar
 
Join Date: Jan 2009
Posts: 1,642
Rep Power: 193
Jaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond reputeJaseth has a reputation beyond repute
Default Re: silly question, How far can my 65mW 532nm go?!

EF: There is a train station in Wales with a name almost as long as that sentence

Basically lasers go on forever, until every last wave of light has hit some tiny particle somewhere in space. Stars can be seen clearly several thousand light years away and their light is not even coherent, even if they ARE very very bright. My guesstimate would be that your laser could be picked up by extremely extremely responsive gear (which could measure every single photon) a couple of planets away.

Now Eku has answered pretty well about the visibility already. A laser is always brighter seen from the recipient's point of view, and if that person was standing in total darkness your 100mW would probably be visible about 5km away.
I think this part has been answered way better some other place on LPF and it is difficult to say what a "visible" laser is.. whether the mere fact that you can sense some change in light is enough or that you need to see a clear beam coming towards you for it to be "visible".

Anyway you should never ever shine at or near an aircraft, no matter how dim you think the laser is. You cannot estimate the hight of the plane well enough and cannot estimate how much light is visible at that distance. Pilot's eyes are also adjusted to very sensitive night vision with very dim control boards in the cockpit and so on, and a tiny flash from a laser might be enough to distract them and cause them to report your laser, or in the worst case cause an accident.
Also pilots often stray from their planned flight path (I should know, about 10 fly straight over my house every day even though their route is listed as 8 miles away!) and it is therefore even more difficult to estimate hight and location of planes. Just don't shine it at planes. Ever.

Another interesting thing observed by many here on the forum, including me, is that the longer the wavelength (eg. red 650nm), the further the beam seems to extend into the night sky, while shorter wavelengths seem to create a fatter and more visible beam close up, especially blu-ray 405nm which can appear as thick as a baseball bat at just 10 yards distance.
My theory on this is that it is caused by short wavelengths moving up and down more and therefore encountering more particles to light up, while long wavelengths move less and therefore do not encounter that many particles so the beam is still not weak at a distance.
__________________
Many 405nm, 445nm, 473nm, 532nm and 655nm
4.2W RGB projector with DT-25 and FB3
Kenometer Pro

Don't be an idiot - protect yourself with proper goggles and never point a laser at living things or vehicles, especially aircraft.
Jaseth is offline   Reply With Quote
Old 06-26-2009, 04:09 PM   #6
Class 3B Laser
 
chipdouglas's Avatar
 
Join Date: Dec 2008
Location: Riverside, California
Posts: 3,978
Rep Power: 212
chipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond reputechipdouglas has a reputation beyond repute
Send a message via Yahoo to chipdouglas
Default Re: silly question, How far can my 65mW 532nm go?!

how far it goes might be irrelevant. but a cool party "trick" is go out side on a cloudy night and shine it directly up and you will see it hit the clouds. with my 50mw ledshoppe pointer i can see it reflect on a high rise window at over a mile away.

to see it hit the cloud, first point it to open sky, the laser will seem infinite. Then sweep the beam to the clouds above you, and you will see a bright dot. that is where it hits the clouds
__________________
IN A CONSTANT STATE OF PICNIC

I AM THE STATUS QUO

ARE YOU A NEW MEMBER, OR EVEN MORE, ARE YOU NEW TO ONLINE FORUMS... READ THIS
LASER POINTER FORUM ETIQUETTE


for pot modding facts click below

http://laserpointerforums.com/f51/pot-modding-faqs-40510.html
chipdouglas is offline   Reply With Quote
Old 06-26-2009, 07:54 PM   #7
Class 1 Laser
 
Join Date: May 2009
Posts: 51
Rep Power: 0
superkai has a little shameless behaviour in the past
Default Re: silly question, How far can my 65mW 532nm go?!

Quote:
Originally Posted by ElektroFreak View Post
That's the longest sentence in the world! congratulations!!

sorry man, because my english is not really good!
superkai is offline   Reply With Quote
Old 06-26-2009, 07:55 PM   #8
Class 1 Laser
 
Join Date: May 2009
Posts: 51
Rep Power: 0
superkai has a little shameless behaviour in the past
Default Re: silly question, How far can my 65mW 532nm go?!

Quote:
Originally Posted by Jaseth View Post
EF: There is a train station in Wales with a name almost as long as that sentence

Basically lasers go on forever, until every last wave of light has hit some tiny particle somewhere in space. Stars can be seen clearly several thousand light years away and their light is not even coherent, even if they ARE very very bright. My guesstimate would be that your laser could be picked up by extremely extremely responsive gear (which could measure every single photon) a couple of planets away.

Now Eku has answered pretty well about the visibility already. A laser is always brighter seen from the recipient's point of view, and if that person was standing in total darkness your 100mW would probably be visible about 5km away.
I think this part has been answered way better some other place on LPF and it is difficult to say what a "visible" laser is.. whether the mere fact that you can sense some change in light is enough or that you need to see a clear beam coming towards you for it to be "visible".

Anyway you should never ever shine at or near an aircraft, no matter how dim you think the laser is. You cannot estimate the hight of the plane well enough and cannot estimate how much light is visible at that distance. Pilot's eyes are also adjusted to very sensitive night vision with very dim control boards in the cockpit and so on, and a tiny flash from a laser might be enough to distract them and cause them to report your laser, or in the worst case cause an accident.
Also pilots often stray from their planned flight path (I should know, about 10 fly straight over my house every day even though their route is listed as 8 miles away!) and it is therefore even more difficult to estimate hight and location of planes. Just don't shine it at planes. Ever.

Another interesting thing observed by many here on the forum, including me, is that the longer the wavelength (eg. red 650nm), the further the beam seems to extend into the night sky, while shorter wavelengths seem to create a fatter and more visible beam close up, especially blu-ray 405nm which can appear as thick as a baseball bat at just 10 yards distance.
My theory on this is that it is caused by short wavelengths moving up and down more and therefore encountering more particles to light up, while long wavelengths move less and therefore do not encounter that many particles so the beam is still not weak at a distance.


thanks for you replied, i think i got it, and yeah I will never shine it at airplanes or people, thats really dangerous!!
superkai is offline   Reply With Quote
Old 06-26-2009, 07:56 PM   #9
Class 4 Laser
 
Join Date: Nov 2008
Posts: 5,736
Rep Power: 373
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: silly question, How far can my 65mW 532nm go?!

Quote:
Originally Posted by superkai View Post
sorry man, because my english is not really good!

No apology necessary.. I was just messin' with you anyway.
__________________
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 06-26-2009, 11:21 PM   #10
Cereal Eater
 
Join Date: Dec 2007
Location: Argentina
Posts: 6,334
Rep Power: 297
nikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond reputenikokapo has a reputation beyond repute
Send a message via MSN to nikokapo
Default Re: silly question, How far can my 65mW 532nm go?!

That is actually a good question, not silly. You should create a thread in the Science & Lasers section I'm so proud of asking how far an XmRad laser can get while being visible for a human.
nikokapo is offline   Reply With Quote
Old 06-27-2009, 06:40 PM   #11
Class 2M Laser
 
realista's Avatar
 
Join Date: Dec 2008
Location: italy
Posts: 921
Rep Power: 13
realista is a glorious beacon of lightrealista is a glorious beacon of lightrealista is a glorious beacon of lightrealista is a glorious beacon of lightrealista is a glorious beacon of light
Default Re: silly question, How far can my 65mW 532nm go?!

i have a 30mw dealextreme kaleidoscopic that goes 5 kilometers far!!!!!checked with google meter. the dot is very big at 5 km... and not very shining.. bt i saw it with the binocular...and it exists at 5 km..... goood......for a 30mw. i don't know how could be a true 200mw seted at a good divergence.... mmhmhhmhhhhhhh ( like homer simpson) sbav
realista is offline   Reply With Quote
Reply


Database of Laser Pointer Companies




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


laser pointer forums top





Top 50 Laser Pointer Companies - Green Lasers Top 50 Laser Pointer Companies - Blue Lasers Top 50 Laser Pointer Companies - Red Lasers
Top 50 Laser Pointer Companies - Yellow Lasers Top 50 Laser Pointer Companies - Purple Lasers Top 50 Laser Pointer Companies - Orange Lasers
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







All times are GMT. The time now is 03:22 PM.


Powered by: vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2014 Laser Pointer Forums, LLC