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1. Holographic lenses have already been built.

2. The major problem is the chromatic abberations.

3. Thats all I care to comment on this subject.

Best regards,
Pete Nance, Jr.


> From: Paul Cousoulis 
> Date: 2003/06/26 Thu PM 09:13:57 PDT
> To: Harold ,  atm{at}shore.net
> Subject: Re: ATM Holographic Objective Lens?
>
>
> No, You can't even get a holograph to 'project'. When you look into a
> hologram, the light comes straight out or straight through the media.
> You can't get the hologram to appear outside the edges of the media. If
> the hologram is on sheet a paper, some objects may appear in front of
> the paper, while other objects appear to be behind the surface of the
> paper, but you can't turn the paper edge on and see something floating
> above it.


Where did you get this information?


A hologram works on the same principles as a telescope mirror.
> A bigger aperture has a higher resolution because the light at the edges
> of the mirror interact to form diffraction patterns which result in the
> images we see. At the limits of resolution we see the Airy disk which is
> the diffraction pattern of a point source of light. A hologram uses a
> film where there is a front surface and a back surface. Light from the
> back surface interacts with light from the front surface to create
> diffraction patterns which our eyes see as images. Each eye sees a
> different pattern creating an illusion of three dimensions. There is no
> real projection.
>
>
> Paul
>
> Harold wrote:
> >
> > > Is this possible??
> >   If holographic technology can project images of a solid object. What
would
> > happen if you project a lens as the object, would it  function just like a
> > refractive objective lens where it can capture  light and converge it into
a
> > point?
> >  Someday, when you want to use a refractor, maybe you can just flick  on a
> > swith and the lens would be projected with 0 wavefront error and fully
> > multi-coated (holographically). Is this technology possible someday? What
do
> > you think?? >>
> >
> >    The above is a question that was posed by a member of  less technical
> > minded telescope group.I thought the idea interesting.but don't even have
> > knowledge to  adaquately to answer it and so far none in that group have
> > offered up any answers. Thought i would present his querry here as it may
be
> > of interest to the more techincal minded.
>
>

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