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Here's a picture of Brent Shaws "Dry Dive".
It has a camera at the top of an air intake pipe. The pipe
must be detachable
as I've seen pictures of it in transit with it down. He
was very happy with it.
Alan
----- Original Message -----
Sent: Saturday, February 06, 2010 7:36
AM
Subject: RE: [PSUBS-MAILIST] optronic
mast
David,
Do you have experiance with building a periscope? or do you have
any suggestions for a small one for a psub? I wouldn't mind
having one that I could retract. I would have to find
a sutible place for it however.
Brian
Jens,
With the camera
mounted to the upmost portion of the mast and rotated with this mast, this
inversion will not take place...I have in my study of actual periscope
optics come across this inversion.
I think one could spend a
lifetime studying this area and still not be fully satisfied with the
results...You have to eventually say to your self this is simply good enough
and move
on.
David Bartsch
> Date: Fri, 5 Feb 2010 15:41:46 +0100
>
Subject: RE: [PSUBS-MAILIST] optronic mast
> From:
laland@artematrix.org
> To: personal_submersibles@psubs.org
>
> David
>
> ** My mast camera will not be this fancy but
will able to be rotated to
> ** hopefully make up for any shortfall in
viewing angle.
>
> I have also looked into a version using a
fixed, vertical mounted video
> camera inside a tubular mast, and only
rotate the external optics above.
>
> However, this method will
produce the exact same effect for the observer
> as the Royal Navy
submariners had to deal with in World War One: a
> periscope image
that gradually turned itself upside down as it approached
> the aft
direction.
>
> The funny thing, though, is that those guys
protested when they were first
> introduced to a more modern
periscope, since they claimed the old system
> actually helped them to
always know which direction they were looking.
>
> Best
regards,
> Jens Laland
>
>
>
>
>
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