If anyone is in to holography I have a pack of frozen since new sealed Kodak
SO Holographic 4 x 5 film...for sale mak@teleport.com
-----Original Message-----
From: Bob Kiss <bobkiss@caribsurf.com>
To: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
Date: Tuesday, December 07, 1999 8:05 PM
Subject: Re: now here's a weird one...
>DEAR DEAN,
> And the Lippmann process is cited in almost every primer on Holography.
> "Curiouser and curiouser!"
> CHEERS!
> BOB KISS
>-----Original Message-----
>From: dean kansky <dkansky@hotmail.com>
>To: alt-photo-process-l@sask.usask.ca <alt-photo-process-l@sask.usask.ca>
>Date: Tuesday, December 07, 1999 4:38 PM
>Subject: Re: now here's a weird one...
>
>
>>
>>>I was just wondering if anybody had ever attempted the Lippmann process,
>or
>>>interference-phenomenon based coulour photography...
>>
>>French physicist Gabriel Lippmann (1845-1921) devised a system of color
>>photography in 1981 that relied on wavelength
>>interference rather than dyes or pigments. His panchromatic glass plate
was
>>coated with an almost clear emulsion made
>>of very small silver halide crystals. In the camera, the plate faced away
>>from the lens, and the emulsion was in contact
>>with a nearly perfect mirror of liquid mercury. Light passed through the
>>glass plate and emulsion and was reflected by
>>the mercury. Phase difference caused the reflected rays to interfere with
>>the light coming through the plate.. Varying
>>degrees of cancellation and reinforcement ocurred, producing a latent
image
>>of the interference pattern set up within
>>the emulsion. After development, the faint but natural color image was
>>viewed by placing the plate against a mirror and
>>shining a light through it. Examined at a carefully determined angle, only
>>the original wavelengths could pass through
>>the interference pattern. The process has proven to be too difficult for
>any
>>application beyond scientific investigation for
>>which it was originally conceived.
>>
>> by H. Wallach in the Focal Encyclopedia of Photography
>>
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>
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