Advances in CCD to go with Canon

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erobkin@uwc.edu
Date: 09/12/00-02:13:57 PM Z

Since posting the message about the Canon lens I heard a news story that
said someone
had developed a CCD with resolution so that "a 4 ft by 8 ft enlargement
showed no pixilization or artifacts" Now that may be from interpolation
and smoothing and have only pr meaning or it may be real. Anyone hear
about this? If that is a CCD of a size to fit in a 35 mm SLR style body
then the Canon lens idea coupled with that much resolution would be
a revolution indeed. If I see any followups on it I'll post them here.

Eugene Robkin

-----Original Message-----
From: alt-photo-process-error@skyway.usask.ca
[mailto:alt-photo-process-error@skyway.usask.ca]
Sent: Tuesday, September 12, 2000 12:36 PM
To: alt-photo-process-l@skyway.usask.ca
Subject: Re: Advances in lens design

I don't know anything specific, but the concept is right. So I would say
that
it's not PR, it's real. I shudder to think of what one costs.

Dave

erobkin@uwc.edu wrote:

> I pulled the following stuff off the web. Those of you with an interest
> in some of the technical sides of photo lenses may find it worth looking
at.
> It looks like the capability of lenses to capture information is taking
> another big step beyond the ability of the CCD/digital duo to record it.
>
> Anyone with additional information about any of this? Is it PR and not
> science?
>
> Eugene Robkin
>
> -------------------------------------
> Canon has announced development of the world's first 'Multi-layer
> Diffractive Optical Element'. A prototype Canon EF 400mm f4 DO IS USM
> lens incorporating this element will be exhibited at Photokina 2000
> (Cologne, 20 to 25 September). A commercial version is expected in the
> first half of 2001.
>
> By combining a Multi-Layer Diffractive Optical Element and a refractive
> optical element within the same optical system, chromatic aberration,
> which adversely affects image quality, can be corrected even more
> effectively than with a fluorite element. Also, through minute
> adjustments, the diffractive optical element makes possible the same
> optical characteristics as a ground and polished aspherical surface,
> which effectively corrects for spherical and other aberrations.
>
> Further details are available at
>
> www.canon.com/do-info/index.html
>
> ---------------------------------
>
> The following site describes some of the manufacturing techniques that
> may be involved in the Cannon design.
>
> http://www.takeuchi.mce.uec.ac.jp/papers/upmm/1999-08e/

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