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Author Topic: Master Image Filter Wheel question
Jim Cassedy
Phenomenal Film Handler

Posts: 1661
From: San Francisco, CA
Registered: Dec 2006


 - posted 05-08-2015 02:15 PM      Profile for Jim Cassedy   Email Jim Cassedy   Send New Private Message       Edit/Delete Post 
Are the polarizing filters of a Master Imgage 3D system sandwiched inside the spinning
glass disk, or are they applied to one of the exterior surfaces?

(In other words- - what I'm trying to find out is how "protected" the actual
filter material is from damage when cleaning the disk, etc)

Tnx!

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Kris Verhanneman
Expert Film Handler

Posts: 182
From: Belgium
Registered: Dec 2009


 - posted 05-08-2015 02:30 PM      Profile for Kris Verhanneman   Email Kris Verhanneman   Send New Private Message       Edit/Delete Post 
Hello, the filter is on the outside of the disk. You can scratch it. (talking about the rotating disk version not the horizon version).

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Stephan Shelley
Jedi Master Film Handler

Posts: 854
From: castro valley, CA, usa
Registered: Nov 2014


 - posted 05-08-2015 08:21 PM      Profile for Stephan Shelley   Email Stephan Shelley   Send New Private Message       Edit/Delete Post 
The disk is plastic and as such both sides can scratch.

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Marcel Birgelen
Film God

Posts: 3357
From: Maastricht, Limburg, Netherlands
Registered: Feb 2012


 - posted 05-09-2015 11:43 PM      Profile for Marcel Birgelen   Email Marcel Birgelen   Send New Private Message       Edit/Delete Post 
The disc indeed seems to be some sort of plexiglass. I have never given it much thought, but isn't the disc far to thick for just a linear polarizer and retarder? Sure, you need a certain thickness to ensure stability, so wouldn't it actually make some sense to put those layers inside the disc, sandwiched between a protective layer of clear plexiglass?

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Stephan Shelley
Jedi Master Film Handler

Posts: 854
From: castro valley, CA, usa
Registered: Nov 2014


 - posted 05-13-2015 05:57 PM      Profile for Stephan Shelley   Email Stephan Shelley   Send New Private Message       Edit/Delete Post 
Not sure if they are sandwiched or just laminated to one side the polarizing material.The main body is polycarbonate. Much stronger than acrylic.It does spin at a very high speed.

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Justin Hamaker
Film God

Posts: 2253
From: Lakeport, CA USA
Registered: Jan 2004


 - posted 05-13-2015 06:41 PM      Profile for Justin Hamaker   Author's Homepage   Email Justin Hamaker   Send New Private Message       Edit/Delete Post 
The disc is definitely plexiglass. The 'wedges' are some sort of plastic or vinyl which are adhered to the disc. Not sure if they are laminated or just an adhesive, but they can be pealed off is you're not careful.

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Phil Ranucci
Expert Film Handler

Posts: 236
From: Carpinteria,CA, United States
Registered: May 2006


 - posted 05-13-2015 10:46 PM      Profile for Phil Ranucci   Email Phil Ranucci   Send New Private Message       Edit/Delete Post 
When cleaning don't spray the disc, spray the microfiber cloth. If the filter gets wet it will peel off and make a racket when it gets up to speed.

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