[NJARC] Fluorescing minerals

[pvourtsis at optonline.net]

I remember early color tvs having decent color except for red. Was not aware that the blue was a problem also.

----- Original Message -----
From: amagoun 
Date: Wednesday, December 13, 2006 11:22 am
Subject: [NJARC] Fluorescing minerals
To: NJARC 

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Willemite is found only in northern New Jersey and to a small 
> extent in
> New Mexico. RCA's Humbolt Leverenz used it as the basis for CRT
> phosphors that were synthesized for mass production, as can be 
> seen in
> that green jar on display in the David Sarnoff Library next to 
> the 721TS
> receiver. The human eye is most sensitive to green light, it coming
> from the middle of the visible spectrum, which is why one of the
> challenges with red and blue in color TV was to fabricate 
> phosphors of
> equal brightness for a given electron beam intensity.
> 
> Alex
> 
> --
> Alexander B. Magoun, Ph.D.
> Executive Director
> David Sarnoff Library
> 201 Washington Road, CN 5300
> Princeton, NJ 08543-5300
> 
> 609-734-2636
> amagoun at davidsarnoff.org
> (f) 609-734-2339
> www.davidsarnoff.org
> www.davidsarnoff.blogspot.com
> 
> 
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