Optics: image projectors – Stereoscopic
Reexamination Certificate
2004-10-21
2010-11-16
Dowling, William C (Department: 2878)
Optics: image projectors
Stereoscopic
C353S084000, C349S015000, C359S464000, C348S060000
Reexamination Certificate
active
07832869
ABSTRACT:
In one aspect, the present invention relates to a stereoscopic projection system including a projection device with at least one filter which filters a parameter of the light in a color selective manner. The at least one filter which filters a parameter of the light in a color selective manner has a spectral characteristic for transmitting light in a first wavelength band or set of wavelength bands and for reflecting light in a second wavelength band or set of wavelength bands. The projection device includes a device, such as e.g. a rotating wheel or a sliding filter, for fast synchronized switching between light in different wavelength bands or sets of wavelength bands. In a further aspect, a stereoscopic projection system is provided in which a combination of a first and a second filter mechanism are used, the first filter mechanism being a filter which filters a parameter of the light in a color selective manner, such as a color selective filter or a color selective retarder, and the second filter mechanism preferably being a polarizer or a shutter.
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Cardillo L. et al: “Advancements in 3-D Stereoscopic Display Technologies: Micropolarizers, Improved LC Shutters, Spectral Multiplexing, and CLC Inks”, Journal of Imaging Science and Technology, Soc. For Imaging Science and Technology, Springfield, VA, US, vol. 42, No. 4, Jul. 1998, pp. 300-306, XP000990104, ISSN: 1062-3701.
Malfait Koen
Maximus Bart
Vermeirsch Koenraad
Bacon & Thomas PLLC
Barco N.V.
Dowling William C
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