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Re: [ccp4bb] 3D Glasses - Vuzix HMD by eDimensional |
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CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999Subject: Re: 3D Glasses - Vuzix HMD by eDimensional From: Harry Powell harry {- at -} MRC-LMB {- dot -} CAM {- dot -} AC {- dot -} UK Date: 2008-02-04 Okay, I was wrong. On two points... What I'd forgotten is that LCD displays produce polarized light (and so do TFT displays, for that matter), so you don't need a sheet of Polaroid to polarize the light from the vertical display. The half-silvered mirror is there (of course, I hear the cries) to make sure you have enough light reflected from the "horizontal" monitor to be about the same as the light transmitted from the vertical one. On 4 Feb 2008, at 12:09, Harry Powell wrote: > Hi > > Just looking at the diagrams, I don't think the glass is half-silvered > - it looks like a large sheet of Polaroid™. It only needs to polarize > the transmitted light from the vertically oriented monitor, since the > reflected light from the interface between two materials (at least one > of which has a refractive index) will be polarized in any case (that's > why your Polaroid™ sunglasses let you see below the waves...). My > physics is too rusty to remember, but I think the vertical monitor in > this case needs to be polarized vertically, since the reflected > polarized light will be horizontal. > > No idea where you can buy large sheets of Polaroid™ though. > > IMWBW, though... > > On 4 Feb 2008, at 11:30, P Hubbard wrote: > >> Hi Andrew, >> >> Just like the commercial systems, the glass is the only special piece >> of kit (which can be bought separately). The LCD monitors are just >> set up to display either left or right channel. If you ask me, I >> think these companies are just a rip off! >> >> Paul >> >> > Date: Mon, 4 Feb 2008 11:24:32 +0000 >> > From: ar@MRC-DUNN.CAM.AC.UK >> > Subject: Re: [ccp4bb] 3D Glasses - Vuzix HMD by eDimensional >> > To: CCP4BB@JISCMAIL.AC.UK >> > >> > P Hubbard wrote: >> > >> > > Just an FYI.... you can build those yourself at a fraction of the >> price! >> > > You just need the special piece of glass, two identical LCD >> monitors, >> > > and an edited X config file. >> > >> > The clever bit of the Omnia system (and the similar one from Planar, >> > which being from the US might be cheaper there...?) is the DVI >> > "reflector" card that flips the image to be displayed on the screen >> seen >> > in the half-silvered mirror. >> > >> > Are you implying that an appropriately written Xorg.conf can get the >> > graphics card to do this instead? The prospect is very appealing! >> > >> > Regards, >> > >> > Andrew >> > >> > -- >> > Dr. Andrew Raine, Head of IT, MRC Dunn Human Nutrition Unit, >> > Wellcome Trust/MRC Building, Hills Road, Cambridge, CB2 2XY, UK >> > phone: +44 (0)1223 252830 fax: +44 (0)1223 252835 >> > web: www.mrc-dunn.cam.ac.uk email: Andrew.Raine@mrc-dunn.cam.ac.uk >> >> Helping your favorite cause is as easy as instant messaging. You IM, >> we give. Learn more. > Harry > -- > Dr Harry Powell, MRC Laboratory of Molecular Biology, MRC Centre, > Hills Road, Cambridge, CB2 2QH > > > Harry -- Dr Harry Powell, MRC Laboratory of Molecular Biology, MRC Centre, Hills Road, Cambridge, CB2 2QH CCP4bb navigationCCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999 |
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