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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><FONT
face="Times New Roman"><FONT color=#000000><FONT size=3><SPAN
class=634425015-07012006><FONT face=Tahoma size=2>Russell Wallace
wrote>><BR></FONT>>></SPAN>I've been to movies with polaroid-glass
3D, and they never quite work; you always get a headache trying to keep both
eyes locked on the scene; it was that way 15-20 years ago, is still that way
now. Does anyone know why that happens, and whether it's intrinsic, or something
that could in principle be fixed but will be unaffordable for the near future,
or something that will likely be fixed with foreseeable progress?<SPAN
class=634425015-07012006><<</SPAN></FONT></FONT></FONT><BR></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>Two reasons that I know of (there may be
more):</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG></STRONG></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>1) You must keep your head essentially level or
it changes </STRONG></SPAN></FONT><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>the <BR>relationship between your two
eyes. Normally we unconsciously<BR>shift our head, tilting it slightly,
turning a bit left or right.<BR><BR>2) Reduction in light (this may have changed
since I haven't<BR>seen one lately due to the various effects) since the
polarization</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>reduces light to each eye and generally the
projectors have do<BR>NOT have increased power/light to compensate. Shows
tend to</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>be "dark".<BR><BR>Glasses (or something
similar) for the projectors are the likely<BR>best path to improvement:
beam the two signals directly onto<BR>the retina. This has been possible
(safely) for 5 years or more<BR>but the price, size(comfort), and
resolution/'screen' size.<BR><BR>(That is, they were stuck at VGA and below for
quite a while,</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>but in principle this can go to much higher
resolution with</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG>very small advances in the
technology.)</STRONG></SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=634425015-07012006><STRONG></STRONG></SPAN></FONT> </DIV><!-- Converted from text/plain format -->
<P><FONT size=2><SPAN class=634425015-07012006>--<BR></SPAN></FONT><FONT
size=2>Herb Martin</FONT></P>
<P><FONT size=2></FONT> </P><FONT size=2></FONT><FONT size=2></FONT><FONT
size=2></FONT><FONT size=2></FONT><BR>
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<FONT face=Tahoma size=2><B>From:</B> extropy-chat-bounces@lists.extropy.org
[mailto:extropy-chat-bounces@lists.extropy.org] <B>On Behalf Of </B>Russell
Wallace<BR><B>Sent:</B> Saturday, January 07, 2006 4:40 AM<BR><B>To:</B> ExI
chat list<BR><B>Subject:</B> Re: [extropy-chat] personal
display<BR></FONT><BR></DIV>
<DIV></DIV>On 1/7/06, <B class=gmail_sendername>Dirk Bruere</B> <<A
href="mailto:dirk.bruere@gmail.com">dirk.bruere@gmail.com</A>> wrote:
<DIV><SPAN class=gmail_quote></SPAN>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid"><SPAN
class=q></SPAN>A better solution for those who have the patience, space and
money would be to buy two SVGA projectors and polarise the outputs. Then
watch the screen with polaroid glasses for a full 3D effect with close to
180 deg field of view. </BLOCKQUOTE>
<DIV><FONT face=Arial color=#0000ff size=2></FONT><FONT face=Arial
color=#0000ff size=2></FONT><FONT face=Arial color=#0000ff size=2></FONT><FONT
face=Arial color=#0000ff size=2></FONT><BR>I've been to movies with
polaroid-glass 3D, and they never quite work; you always get a headache trying
to keep both eyes locked on the scene; it was that way 15-20 years ago, is
still that way now. Does anyone know why that happens, and whether it's
intrinsic, or something that could in principle be fixed but will be
unaffordable for the near future, or something that will likely be fixed with
foreseeable progress?<BR></DIV><BR>-
Russell<BR></DIV></BLOCKQUOTE></BODY></HTML>