[Jukebox-list] Re: W850 & question

[David Breneman]

--- Wesley Dean <wesleydean at cox.net> wrote:

>     David, there is a fabricated sheet behind the Peacock glass
> called the 'Analyzer that consists of pieces of mica sandwiched
> between two planes of regular glass. 

Hi, Wes -  Yeah, I'm familiar with how polarized light
works (among other diversions I take a lot of stereo
slides, and opposing Polaroid filters are needed to project
them).  My original question was how the filters turned,
because at first glace it looked like the baskets that
support them were attached to the reflectors behind
the lights - an impression I since learned was wrong.

I imagine this machine is a little before your time,
Wes, but what did the operators in the field think of
this box?  Was it considered a maintenance headache?

Here's a little trivia for the technically minded.
In the 1920s, the first television projectors used
a piece of "icelandic spar" which was a polarizer of
light in the days before Polariod filters.  Light
shined through this mineral, then through a suspension
of crystals which aligned one way or another depending
on the electrical field around them, to which the
video signal was sent.  The the light beam travelled
on to a mirror-covered drum and/or screw which
scanned the picture onto a screen.  So the original
LCD display dates to the 1920s, and it was all of
one pixel!


David Breneman         david_breneman at yahoo.com


 
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