P3D Re: optics of stereo viewers

[GBMars <GBMars@xxxxxxx>]

Greg Wageman wrote:

>My new Dell home system has a Trinitron-based 17" Dell monitor.  They are
really
>quite superior to the conventional 3-gun tube in many respects (single-axis,
>rather than dual-axis, curvature; aperture grill rather than shadow mask,
single
>gun rather than triple).

I hesitate to disagree with the near-religious beliefs some people hold
regarding
Trinitron technology, but I must.  Single axis curvature is nice, but flat is
better.
I'm not sure what this has to do with Trinitron, if anything.  Aperture grill
is 
designed to allow a higher percentage of electrons through and thus produce a
brighter image (or a useable image with less energy).  This is good if
brightness
is your main concern, or if you have to turn up the brightness so much that it
causes blooming.  The down side is that the distance between elements of the 
same color is increased (you have RGB stripes instead of alternating patterns 
of RGB).  Then there is that silly wire (or two, depending on the screen size)
needed to support the grill:  It makes a very visible horizontal line right
across 
the screen!  The first time I saw this I was convinced the monitor was
defective
until someone explained it to me, at which point I just wondered why anyone
would buy such a monitor.  In truth, I later bought one myself, for the
reasons
stated above.  Finally, I don't know how a "single gun" color CRT works, but
it seems pretty unlikely, if not outright impossible.  I think what they mean
is
that the three electron emitters are fabricated as a more-or-less single
piece,
in the hope of getting tighter tolerances on the positioning.  It may be so,
but I
still contend that a standard triad shadow mask (of equivalent aperture
dimensions)
gives a shaper image.

Greg M.


------------------------------