STEREOSCOPIC PROJECTION
In the early days (1920s+) 3D projection was anaglyphic... then there was dual projector polarized 35mm film (1940s+). Now projection is done digitally, which is critical for optimal sync and alignment.
Studio 3D REVIEWS 3D MOVIES
SINGLE LENS
ALTERNATE LEFT and RIGHT
Left and Right views from single projector lens.
PASSIVE SINGLE LENS
RealD Mini Z-Screen Multiplexer
This consumer size modulator switches polarity 144 times per second in sync with L and R images... even though the polarizer is active, the glasses are passive. Similar active polarizers are used in theaters. All polarized systems require a silver (non-depolarizing) screen.
LG CF3D Full HD Home Cinema Projector
Listed in 2010 for $14,999 with only 1250 lumens in 3D mode. The only single lens home 3D projector I know of. Discontinued July 2013
ACTIVE SINGLE LENS
Active 3D Projector w Active Glasses
Many consumer projectors are "3D Ready" and have DLP-link tech which syncs the alternate L/R images to the electronic shutter glasses. No silver screen required.
DUAL LENS
SEPARATE L and R
Motion is smoother with dual streams.
DUAL PROJECTOR
Two Aligned Projectors on Adjustable Stand
Any two matched projectors will usually work, but DLP is better for polarized filter. Alignment is critical- a 2D source should show zero ghosting. Filters can be polarized or dichroic.
(Omega3D filters shown).
EPSON DUAL PROJECTOR
Epson W16SK 3LCD Dual Projection System
This Epson dual projector configuration specifically for 3D (1200x800, 3000 lumens each) is apparently still available at Walmart.
BUILT-IN DUAL LENS
Dayjoy Dual Lens 3D Projector
Extremely unusual format, I never actually saw one but seems they were for sale on Amazon in 2014.
IMAX DUAL DIGITAL
IMAX Monster Projector Pair
IMAX first projected 3D in 1986 at the Vancouver EXPO via dual 70mm film projectors. They've mostly transitioned to digital, and some theaters have dual laser setups.
Excellent tutorial in 3D projection by BARCO (theatrical projection company)
Except... not sure of the existance of a "dedicated color separation wheel" for dichroic/super anaglyph projection...? And they could have used an actual L/R view of a car instead that poor graphic!
ACCESSORIES
USEFUL FOR 3D PROJECTION
ADJUSTABLE STAND
Professional quality refurbished projector stand fits small digital projectors up to appx 12"Wx11"Dx4.5"H.
Top level fully adjustable to align stereo images. With linear polaring filters for passive stereo projection, attach/detach with Velcro. (silver screen needed)
OA dimensions 18.5Wx15Dx16"H
Comes with 5 pair of 3D glasses.
$395.00
SHIPPING 18 lbs
Stand without polarizers/glasses $325.00
SILVER SCREENS
Silver screens to maintain polarization are not easy to come by. See silver screen page for more information.
MATROX DUALHEAD2GO
Split your double wide side by side source files
A full HD side by side file will be 1920x2(3840) x 1080. The Matrox will split the file so left and right HD images can be overlapped on the projection screen (panorama shown on monitors).
DE-MULTIPLEXER
AirFlex5D™ Digital Multi-Projector Stacking System (AF5D-21) 3D Processor
For splitting a Blu-Ray (framepacked) 3D signal to two projectors (Discontinued, find used?).
ALIGNMENT GRID
3840x1080 double wide grid for dual projector alignment
One side of alignment grid shown. Click photo for free downloadable full size grid.