Re: [PSUBS-MAILIST] Hydrophones/lasers

["Andrew Goldstein" <ag@desertstar.com>]

The laser technology is called LIDAR for anyone who wishes to google.

Another applications for lasers underwater (and prob. more common) is to use dual lasers to get a size/distance scale
on images.  It's most useful on rovs where you dont have steroscopic viewing and need additional cues for size and
distance.

There have also been applications for transmitting data on lasers for high bandwidth short range communication.

-a
  

-----Original message-----
From: ShellyDalg@aol.com
Date: Sat, 30 Aug 2008 15:07:53 -0700
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Hydrophones/lasers

> Hi David. The Laser thing was just mentioned in passing in the  article but I 
> was thinking maybe it was just used to penetrate the gloom a  longer distance 
> and made objects visible to the naked eye through the window.  Maybe the 
> right color of laser can travel through water farther than just a  bright dive 
> light. I think it's the red wave length that is most easily blocked  by water, 
> right? Perhaps a green laser beam would be able to cut through the  water a bit 
> farther than a full spectrum light. If that was the method, it would  be easy 
> to mount a small laser pointer behind a window, shining straight ahead  in 
> your direction of travel so you could see an object before you get too close.  I 
> will play with that when I get my sub in the water and see what happens. Frank 
>  D.
> 
> 
> 
> **************It's only a deal if it's where you want to go. Find your travel 
> deal here.      
> (http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
> 
> 



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