Chapter 10 T r o u b l e s h o o t i n g 2 9
on SGI Onyx, portions or all
If the scene are black and
vhite on the HMD
MECHANICAL IMAGE
PROBLEMS AND
IMAGE MISMATCH
video image is blurry at one
edge or comer
corners of image are lost
Colors appear smeared or
ainbow like at edges of dis-
Ilay
One eye is brighter than the
Ither, or colors are different
in the two eyes
image in the two eyes are
different widths or are ro-
tated relative to each other
images are different heights
this is a software limitation
of the SGI. Contact Virtual
Research for further details.
your eye is off to one side
from the exit pupil of the
optics. Try adjusting the
lPD or vertical position of
the displays again.
your eye is too far from the
lens. Pull the shell closer to
your face.
this is a normal limitation of
the lens design. Different
light colors are bent differ-
ently by the lens. The ef-
fect, chromatic aberration, is
more severe the farther from
the center of the display
switch video signals if you
are running in stereo to see if
the problem is caused at the
control box, or at the com-
puter
if the problem is control box
related, adjust SETUP and
GAIN pots inside control
box.
This is an image alignment
problem that requires factory
service. Please contact vir-
t u a l r e s e a r c h .
this can be adjusted at the
control box, but please con-
tact virtual research before
making any adjustment
T-
This is more of a problem
or those who wear eye-
glasses.
If you are reading text, keep
it toward the center of the
display.
nake sure you have the dis-
Ilays aligned to your eyes
tnd as close to your eyes as
)ossible to limit all aberra-
ions.
.mage mismatch problems
will cause eyestrain and
should be fixed promptly
image mismatch problems
will cause eyestrain and
should be fixed promptly
