Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 56 users online :: 6 registered, 0 hidden and 50 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MCRKilljoy, MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

lasers

All non-spudgun related discussion goes here such as projects, theories, serious questions, etc. All "off-topic" posts (aka useless posting, determined by moderators) will be removed.
Sponsored 
  • Author
    Message

Unread postAuthor: jon_89 » Sun Jan 13, 2008 4:26 am

so what is wavelength?
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: Novacastrian » Sun Jan 13, 2008 4:37 am

jon_89 wrote:so what is wavelength?


Wiki should be able to tell you that :)

Edit: Well i'll be, wiki has no such information.
Wavelength refers to the size or length between two "waves" or "pulses". Usually measured with time. Think of the ocean, how long before the next wave hits, except with electronics this period of time is expressed by milliseconds.
  • 0

Last edited by Novacastrian on Sun Jan 13, 2008 4:44 am, edited 1 time in total.
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.

Novacastrian
Major General
Major General
 
Posts: 1604
Joined: Sat Aug 11, 2007 6:59 pm
Reputation: 0

Unread postAuthor: Eddbot » Sun Jan 13, 2008 4:38 am

Image

wavelength is the distance between the troughs(bottom), or crests(top) of a wave, as the wave moves forward, it goes up and down in the same exact pattern (unless it gets reflected or refracted or...i forgot the other one)

the nm has to do with the amplitude in the picture above, a laser wave is measured from the crest to the trough in nanometers

the shorter the wavelength and smaller the amplitude, the stronger/brighter/burnier the laser will be *huff* i'm done lecturing, even though i know someone is gonna add/correct something i messed up on

edit: do i just take too long to type stuff, i always get beat to the post
  • 0

User avatar
Eddbot
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 434
Joined: Tue Oct 09, 2007 6:08 pm
Reputation: 0

Unread postAuthor: jimmy101 » Sun Jan 13, 2008 12:38 pm

jackssmirkingrevenge wrote:As far as I can tell, MW is milliwatts, a measure of power, while NM refers to nanometres, a measure of the wavelength perhaps?

Yep,
MW = milliwatts (the power in the light beam). A MW is not much energy, even when concentrated on a small area.
NM=nanometers=wave length of light produced="color" of the light produced

Wavelengths:
Red (635 nm, actually may appear slightly orange-red) through deep Red (670 nm) and beyond,
IR (invisible) (780 nm, 800 nm, 900 nm, 1,550 nm, etc.) up to several um.
Near-UV, violet, and blue laser diodes are available from around 380 nm to 450 nm but are still very expensive.
Green laser diodes have been produced in various research labs but until recently, only operated at liquid nitrogen temperatures, had very limited lifespans (~100 hours or worse), or both.

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

Other common specs of a laser;

Its diversion (sometimes miss labelled as dispersion). The diversion is basically how much the dot spreads out as a function of distance. Diversion is usually in the range of a milliradian or so.

Dot size, which is typically in the range of 0.5~2mm diameter.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3130
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: jimmy101 » Sun Jan 13, 2008 12:44 pm

Eddbot wrote:the nm has to do with the amplitude in the picture above, a laser wave is measured from the crest to the trough in nanometers

the shorter the wavelength and smaller the amplitude, the stronger/brighter/burnier the laser will be *huff* i'm done lecturing, even though i know someone is gonna add/correct something i messed up on

Nope. "nm" is the wavelength ("color"), not the amplitude (brightness).

There is no obvious relationship between wavelength and amplitude. You can have a small wavelength and a large or small ampliltude. Or a large wavelength and a large or small amplitude.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3130
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: jon_89 » Sun Jan 13, 2008 1:28 pm

so if i was to buy a laser module which one would be the "hottest"? a 650nm 10mw, 780nm 80mw, or a 980nm 35mw.
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: dewey-1 » Sun Jan 13, 2008 1:40 pm

--
  • 0

Last edited by dewey-1 on Sun Apr 20, 2008 2:23 pm, edited 1 time in total.
User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: jon_89 » Sun Jan 13, 2008 1:47 pm

to burn a hole in a piece of half inch steel plate. :twisted: jk. maybe burn a hole in paper from 2 feet away or is that asking for to much.
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: dewey-1 » Sun Jan 13, 2008 2:23 pm

--
  • 0

Last edited by dewey-1 on Sun Apr 20, 2008 2:24 pm, edited 1 time in total.
User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: iPaintball » Sun Jan 13, 2008 3:50 pm

I have made two burning laser pointers using the DVD burner method. If you are going to attempt this, dont EVER point the diode towards your eyes. A diode as powerful as a DVD burner diode is likely to burn/damge your eyes instantly, and they can also cause blindess very quickly. Don't stare at the impact point of the beam either. The IR radiation reflected off of the object you are burning can also cause eye damage. I would read up on laser safety before constructing your laser. If you need some more detailed instructions on how to do this, I posted a how-to on theopia here.
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Unread postAuthor: jon_89 » Sun Jan 13, 2008 3:57 pm

well i think for the sake of simplicity i will make the one on page 1.
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: spudy buddy » Sun Jan 13, 2008 4:15 pm

could u use this as a laser sight on a spud gun?
  • 0

User avatar
spudy buddy
Staff Sergeant
Staff Sergeant
 
Posts: 123
Joined: Thu Nov 29, 2007 9:27 pm
Reputation: 0

Unread postAuthor: MrCrowley » Sun Jan 13, 2008 4:18 pm

No point, spudguns aren't accurate enough anyway.

I tried to calibrate a proper scope to my paintball gun, no point with any object that is spherical in a smoothbore barrel.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: jon_89 » Sun Jan 13, 2008 4:47 pm

Now for the ultimate question. Is a 650nm 10mw laser module from Aixiz worth $12? Is this all I need plus batteries? Or should I go for something different?
  • 0


jon_89
Colonel
Colonel
 
Posts: 607
Joined: Wed Apr 11, 2007 9:50 pm
Reputation: 0

Unread postAuthor: iPaintball » Sun Jan 13, 2008 5:10 pm

no, you need the burner diode. The module you are referring to will just make a bright red dot.
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

PreviousNext

Return to Non-Spudgun Related Discussion

Who is online

Registered users: Bing [Bot], Exabot [Bot], Google [Bot], MCRKilljoy, MSNbot Media, Yahoo [Bot]

Reputation System ©'