[Laser] 5mw laser transceiver kit

[Zack Widup]

I have yet to figure out how someone aligns an IR system over a long
path like over 10 km or more. How do you guys do it?

73, Zack W9SZ


On 9/30/10, Tim Toast <toasty256 at yahoo.com> wrote:
> no? .freaky... A watt of 830nm light can't be felt on the skin. I assume
> that's spread out to one inch diameter or so. That sort of brings up an
> interesting point about sunlight when comparing it with other sources i
> guess. That 1000 watts per square meter, or 0.1 watts per sq cm, that you
> feel on your skin from the sun, is mostly due to light in the longwave
> infrared portion of the spectrum.
>
>>
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Wed, 29 Sep 2010 19:18:36 -0400
>> From: Tom Becker <GTBecker at RighTime.com>
>> Subject: Re: [Laser] 5mw laser transceiver kit
>> To: Free Space LASER Communications <laser at mailman.qth.net>
>> Message-ID: <4CA3C94C.6030403 at RighTime.com>
>> Content-Type: text/plain; charset=ISO-8859-1;
>> format=flowed
>>
>>   > ... Is there a point (right in front of the
>> illuminator) where it
>> feels like sunlight on your hand?
>>
>> No, but mine's a 63-year-old hand. :)  If you mean a
>> sensation of
>> radiated heat, no, not from the barrel illuminator.
>> Thermal IR is a
>> long way from 850nm.
>>
>
>
>
>
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