RE: [PSUBS-MAILIST] Blue-green laser (was: Empress of Ireland)

[Tim Reilly <TimR@cclengineering.com>]

Actually it would be projected on the inside of the hull or an eye piece, or
helmet.  So it would be  more like virtual reality, only some what real
time.  There was something I saw a few years ago where experiments were
being conducted for blind people to use a sonar device of some type in
conjunction with a small computer to generate an image that was picked up by
the optic nerve.  I don't know how far it got  but that would be a good
basis to start from.

Tim R.

-----Original Message-----
From: Coalbunny [mailto:coalbunny@vcn.com]
Sent: Friday, March 21, 2003 4:29 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Blue-green laser (was: Empress of Ireland)


Oh, you mean a holographic sonar display?  Something 3-D?
Carl


Tim Reilly wrote:
> 
> The system used the three inputs, blue-green laser, high-freq active
sonar,
> and passive sonar to create a virtual image of the enviroment around the
> pilot of the craft.  Sounds pretty cool.  My sub, once constructed, is
going
> to be a test platform for different types of technology and for mapping
> bottom areas to its operational depth.  Currently I want it to have an
> operational depth of about 500 feet.  I will expand from there.
> 
> Tim R.
> 
> -----Original Message-----
> From: Michael B Holt [mailto:tlohm@juno.com]
> Sent: Friday, March 21, 2003 11:15 AM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] Blue-green laser (was: Empress of Ireland)
> 
> On Fri, 21 Mar 2003 10:19:16 -0800 Tim Reilly writes:
> >Speaking of dreaming, I was just reading a book called Stingray by
> >Bill Keith, and I was wondering, if there are any electronics engineers
> out
> >there, if a system using a blue-green laser and active and passive
> sonar
> >would be practical.
> 
> In Busby, there's a chart showing the attentuation of various
> colors.    Well, I remember seeing one somewhere.   Blue-green
> penetrates deeper than any other color, I think.
> 
> What did that system do with the combination of laser and
> sonar?
> 
> > This is my primary concern with a sub, is being  able to
> >see for an extended distance under water.
> 
> That's one thing that holds me back from getting really
> serious: around here, visibility is about a meter at noon
> at a depth of a meter!
> 
> Mike H.
> 
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