15 Aug
1999
15 Aug
'99
5:19 a.m.
On 15 Aug 99 at 14:37, Allison J Parent wrote:
<I doubt very much if most CRTs are at all
light-sensitive.
You kidding? Those phosphors are quite sensitive to light at the right
wavelength.
Everyone forgets a plumbicon (and predecessors) used a phosphor coated
target that the image impinged on and then was scanned with a electron
beam with the incident current sensed using an internal collector grid.
Maybe you had to work with the old mono camaras with a tube in it rather
than a CCD.
Allison
How did the old light-pens or the light-gun with Atari 8-bits work ?
Weren't they related to this sensitivity of the CRT ?
ciao larry
lwalker(a)interlog.com
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