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Red light...Green Light





Paul Sutton wrote:

> Both Xenons and CRT's contain the complete visible light spectrum, but
> neither are linear.  Provided the detectors have the inverse non-linearity,
> then the overall system - from photons to  electrons, via the film and the
> optics - is neutral.

All,Remember that the PMT's have to work overtime to compensate for the
non-linearities in the spectral response in both the blue and red channels.
This is why your blue channel is a noise factory, the PMT's are working
overtime to regain this part of the curve.

The Xenon rich lamp exceeds the spectral output of the film as well as the line
array CCD's. This produces the full range of film colors as far upstream as
possible.

Steve Russell, care to comment more here?

--Bob

______________________________________________________________
Bob Festa        festa at pacbell.net
Director of Telecine    festa at encorevideo.com
Encore Santa Monica   310 656 7663



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