[rollei_list] Re: Liquid Lenses
- From: Ardeshir Mehta <ardeshir@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Fri, 21 Jan 2005 20:49:30 -0500
On Friday, January 21, 2005, at 06:37 AM, TrueBadger@xxxxxxx wrote:
> A friend of mine who is a mechanical engineer and a hobby machinist
> constructed an oil-filled lens with flexible membranes as front and
> rear surfaces about twenty or so years ago. He varied the pressure on
> the oil (using a syringe as a reserviour) to change the focal length,
> and could even transiton from a positive to negative lens.
>
> He had a patent search done and found prior art going back to the
> early part of the century, so in essence there's nothing to steal
> here. It's been in the public domain for a long time.
>
> G. King
Yeah, that's what I thought - it's after all an extremely simple idea.
What I am wondering is, why this hasn't been more widely USED.
Cheers.
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