Re: Hyperbolic mirror

From: Ernest Potenziani (epotenziani_at_worldnet.att.net)
Date: 03/15/05 

Date: Tue, 15 Mar 2005 17:33:12 GMT

Anton

   Thanks for the advice. Yes, I'm using the convex side. It's a hyperbolic
shaped mirror about 2.25 inches diameter for a camera with a 1 inch diameter
lens. I have a camera with a 4 inch lens arriving soon and was wondering
what diameter mirror I should get.

Ernie

"anton jopko" <jopkoam@mcmaster.ca> wrote in message
news:d1536b$35t$1@informer1.cis.mcmaster.ca...
> Ernie,
> I assume you are using the convex side of the mirror. I once designed such
a
> mirror and its shape really depends on what rule you use to locate objects
> with differing altitudes. I used the rule that distance from the center of
> the image was proportional to the zenith angle of the an object. you also
> have to decide what telephoto lens you will use so that the diameter of
the
> mirror will fill the field of view. as i recall the diameter i used was
> about 6 inches and the depth was about 2 inches deep. i never made one
> because i did not want to spend big bucks on precision machining and
> chroming.
> Best,
> anton
>
> "Ernest Potenziani" <epotenziani@worldnet.att.net> wrote in message
> news:0fmZd.136009$Th1.18817@bgtnsc04-news.ops.worldnet.att.net...
> > Does anyone know (ballpark figure) what diameter a hyperbolic mirror
(for
> > getting a panoramic 360 degree field of view) should be in relation to a
> > lens diameter/focal length. Or can you point me to a source with this
> info.
> > Any help is much appreciated.
> > Ernie
> >
> >
>
>

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