| From: | "Arno R. Lehmann" <arlehma@***.NET> |
|---|---|
| Subject: | Re: Ultrasound vision |
| Date: | Wed, 3 Feb 1999 22:45:44 +0200 |
>On Wed, 3 Feb 1999, Arno R. Lehmann wrote:
>
>> Still, I do assume that SR's computers are powerful enough to need only
>> short integration times.
>
> No, no, integration time is not a function of computers. It's a
>measure of how many independent samples it takes to form a coherent image.
>It's a function of wavelength. The longer the wavelength, the more
>samples you need the more time it takes to illuminate the target. We can
>do the math in realtime with computers now, but physics is hard to get
>around.
Ooop, I guess I missed THAT point... than, since I'm not very well
educated in physics, could you give some impression of what time would
be needed? Or, IOW, just tell me how long sound waves typically are...
somehow I think that they can't be that long, but I could be wrong...
Arno
--
Arno Lehmann
arlehma@***.net http://www.geocities.com/TheTropics/Cabana/5274/
arno@*******.ast.uct.ac.za http://pinguin.ast.uct.ac.za
