Laser pointers

Danny D · 09-29-2003

I was talking to a friend tonight and he mentioned that a company uses a laser beam to align antennas.He said that the laser can travel something like 10 miles and uses 10W of power.Anyone heard of this before or ishe just making up stuff.The furthest laser I found on google travelled 2km.Thanks in advance.

HITMONEY · 09-29-2003

Yes, a 10w yag laser could easily shoot 10 miles, and cost ya around 20 grand or more. You could spend less for an older water cooled model. (My buddy has one)

A 40w laser can shoot 30 to 40 miles and cost 100k.

digiital · 09-30-2003

A few yrs back I recall seeing in one of the ham magazines where they use two cheapy laser pointers to send morse code over several miles.

PaCiFiSt · 10-20-2003

....I'd say he was probably telling the truth.. theres a big difference between seeying the dot reflecting back from what you're pointing it at, and someone at the other end seeing the beam coming at them.... If you're talking to someone at the other end with a mobile or radio it makes good sense.... from the other end you can easily see it from over twice as far...

the light doesnt go there, get largely absorbed by the target surface, and then reflect some light back the full distance....

nashr · 10-20-2003

Anyone here want to take a shot at using this technique to set up secure communications linkage?

vojky · 10-20-2003

Simple Laser Alighment Method v0.63

1. Attach a $2 laser to a parallel surface of the antenna pointing in the direction of 2nd antenna

2. Have a friend at the other location stare at your aligning laser through binoculars giving you directions.

3. Make slight adjustments until you hear "OH MY GOD! MY EYES, MY EYES!!"

4. Alignment Complete

digiital · 10-20-2003

I don't lie

http://www.r-type.org/laser/76km.htm

09-29-2003	#1 (permalink)
Danny D CorkWireless Cork ireland Join Date: May 2002 Location: Ireland Posts: 56	Laser pointers I was talking to a friend tonight and he mentioned that a company uses a laser beam to align antennas.He said that the laser can travel something like 10 miles and uses 10W of power.Anyone heard of this before or ishe just making up stuff.The furthest laser I found on google travelled 2km.Thanks in advance. __________________ Danny. CorkWireless, Cork Ireland.

09-30-2003	#3 (permalink)
digiital Registered Member Join Date: Mar 2003 Location: Brampton, Ontario Posts: 118	A few yrs back I recall seeing in one of the ham magazines where they use two cheapy laser pointers to send morse code over several miles. __________________ . Digiitals Blog.(Hardware hacking, Wireless/802.11) http://digiital.blogspot.com Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. Mark Twain Skype Me ID: Digiital

10-20-2003	#5 (permalink)
nashr Uber Geek Join Date: Aug 2002 Location: Virginia Posts: 1,624	Laser communications Anyone here want to take a shot at using this technique to set up secure communications linkage? __________________ Help! I've been Simpsonized!

10-20-2003	#7 (permalink)
digiital Registered Member Join Date: Mar 2003 Location: Brampton, Ontario Posts: 118	I don't lie http://www.r-type.org/laser/76km.htm __________________ . Digiitals Blog.(Hardware hacking, Wireless/802.11) http://digiital.blogspot.com Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. Mark Twain Skype Me ID: Digiital

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09-29-2003	#2 (permalink)
HITMONEY Who Wants Butter??? Join Date: May 2003 Location: St. Pete Beach, FL. Posts: 529	Yes, a 10w yag laser could easily shoot 10 miles, and cost ya around 20 grand or more. You could spend less for an older water cooled model. (My buddy has one) A 40w laser can shoot 30 to 40 miles and cost 100k.

10-20-2003	#4 (permalink)
PaCiFiSt Registered Member Join Date: Jan 2003 Posts: 2	....I'd say he was probably telling the truth.. theres a big difference between seeying the dot reflecting back from what you're pointing it at, and someone at the other end seeing the beam coming at them.... If you're talking to someone at the other end with a mobile or radio it makes good sense.... from the other end you can easily see it from over twice as far... the light doesnt go there, get largely absorbed by the target surface, and then reflect some light back the full distance....

10-20-2003	#6 (permalink)
vojky Registered Member Join Date: May 2002 Posts: 29	Simple Laser Alighment Method v0.63 1. Attach a $2 laser to a parallel surface of the antenna pointing in the direction of 2nd antenna 2. Have a friend at the other location stare at your aligning laser through binoculars giving you directions. 3. Make slight adjustments until you hear "OH MY GOD! MY EYES, MY EYES!!" 4. Alignment Complete