Alaskan
0
- Joined
- Jan 29, 2014
- Messages
- 12,025
- Points
- 113
I've thought about the beacon idea for awhile and I built one for atmospheric experiments, not for the ISS or anything else, but having built one using LED's and blue laser diodes to see the performance myself, I now think the best way to do that is probably by using as high a power single mode laser diode as you can get, and then expanding the beam as wide as you can and shooting that into a mirror which sweeps the entire sky, now that's a big job. One problem with this is if in the visible wavelengths you will bring attention you don't want, or perhaps cause a problem for a pilot which is a crime in the U.S., even if an accident we can end up with fines or jail time here. Also, due to the beam being expanded, beyond that of the size of a galvo mirror used for light shows to get lowest divergence, you would need to make your own mirror scanner, that isn't so difficult and you could build a large mirror which turns fairly slowly compared to a light show galvo mirror, but it wouldn't be too difficult to get a decent speed.
The above idea is probably too extreme, for a simple beacon good for a hand full of miles, you can use single mode laser diodes and light show galvo mirrors and controllers, then everything is off the shelf but they are made for the visible wavelength and even if low power single mode, invisible infrared lasers are dangerous and can blind too, hooking that up to a galvo mirror has hazards too. Although if the power is low enough and the beam is put into a line generating lens, then maybe you are OK at IR, as long as everything is up high and there is no way a failure could cause the beam to sweep down to hit someone on the ground.
Simplicity is probably the best idea, just build a pointer using a single mode laser diode, expand it to just a couple inches and collimate to infinity focus, then use a large diameter plano convex cylinder lens to produce a line and scan manually. It could be a poor mans beacon. Using a fix beacon isn't going to be nearly as bright in the distance, but you could do that with 100 watt LED's, then no scanning, no muss and no problem for aircraft..
FYI guys, we have a troll here who has been in the forum for years, I half suspect this is that same guy because he is asking questions I have asked, identical to my own over the years. Need Distance, if you are legit, apologies, but this is really coincidental. Still, I am offering my thinking on this kind of thing because I know more than one individual is interested in atmospheric communication. Regarding UFO's and all that, I have no doubts EBE's are out there somewhere, maybe local?
If anyone who comes across this thread are trying to hook up with one of them, good luck, probably a very difficult thing to make happen and... are you sure you want to do that? I am not so sure you aren't risking yourself. I've seen craft which could be ours, or could be from some other place, I don't know.... at one time I thought I did, but when I examine the issue, the truth is I don't know what I saw, just know it wasn't conventional. My hope is such things can happen, but if it did, would all of them be good? I don't know.
The above idea is probably too extreme, for a simple beacon good for a hand full of miles, you can use single mode laser diodes and light show galvo mirrors and controllers, then everything is off the shelf but they are made for the visible wavelength and even if low power single mode, invisible infrared lasers are dangerous and can blind too, hooking that up to a galvo mirror has hazards too. Although if the power is low enough and the beam is put into a line generating lens, then maybe you are OK at IR, as long as everything is up high and there is no way a failure could cause the beam to sweep down to hit someone on the ground.
Simplicity is probably the best idea, just build a pointer using a single mode laser diode, expand it to just a couple inches and collimate to infinity focus, then use a large diameter plano convex cylinder lens to produce a line and scan manually. It could be a poor mans beacon. Using a fix beacon isn't going to be nearly as bright in the distance, but you could do that with 100 watt LED's, then no scanning, no muss and no problem for aircraft..
FYI guys, we have a troll here who has been in the forum for years, I half suspect this is that same guy because he is asking questions I have asked, identical to my own over the years. Need Distance, if you are legit, apologies, but this is really coincidental. Still, I am offering my thinking on this kind of thing because I know more than one individual is interested in atmospheric communication. Regarding UFO's and all that, I have no doubts EBE's are out there somewhere, maybe local?
If anyone who comes across this thread are trying to hook up with one of them, good luck, probably a very difficult thing to make happen and... are you sure you want to do that? I am not so sure you aren't risking yourself. I've seen craft which could be ours, or could be from some other place, I don't know.... at one time I thought I did, but when I examine the issue, the truth is I don't know what I saw, just know it wasn't conventional. My hope is such things can happen, but if it did, would all of them be good? I don't know.
Last edited: