Abstract:
Es wird ein System zur stereoskopischen Kino-Projektion mit mindestens einem Projektor zum Projizieren zweier Bilder, eines Bildes für ein erstes Auge und eines Bildes für ein zweites Auge eines Betrachters, vorgeschlagen. Die Strahlengänge des vom Projektor ausgehenden Lichts verlaufen jeweils durch einen linearen Polarisator zu einem entsprechend zugeordneten Projektionsobjektiv. Nach dem Passieren des Projektionsobjektivs verlaufen die Strahlengänge der zwei für die Augen eines Betrachters unterschiedlichen Bilder durch einen radialen bzw. einen tangentialen Polarisationsfilter und werden mit unterschiedlichem Polarisationszustand gleichzeitig exakt übereinander auf eine metallische Projektionswand projiziert. Mittels einer Sehhilfe für beide Augen eines Betrachters, deren Gläser unterschiedlich für jedes Auge mit einem radialen bzw. einem tangentialen Polarisationsfilter ausgestaltet sind, wird jedes Teilbild nur für das erste bzw. linke Auge oder das zweite bzw. rechte Auge (oder umgekehrt) sichtbar gemacht und somit für den Betrachter der 3D-Eindruck erzeugt.
Abstract:
Disclosed embodiments relate to a stereoscopic projection system and methods. An exemplary disclosed projection system includes an optical component disposed between the lenses of a lens arrangement. An exemplary lens arrangement includes a first power group, a second power group, and an aperture stop. In an embodiment, the optical component is disposed between the first power group and the aperture stop. In an exemplary embodiment, the optical component is proximate to the aperture stop. By disposing the optical component closer to or proximate to the aperture stop in the lens arrangement, various benefits may be realized, including improved contrast uniformity.
Abstract:
A stereoscopic digital image projecting system has a light source system providing polarized illumination having a first polarization state and a beam splitting system with a rotating segmented disk in the illumination, alternately generating first and second light beams, the rotating segmented disk having outer segments alternately transmissive and non-transmissive and inner segments radially aligned with the outer segments and alternately reflective and transmissive. A polarization rotator in a path of either the first or second light beam rotates the first polarization state to a second state orthogonal to the first. A combining system combines the first and second light beams into a combined light beam. A spatial light modulator modulates the combined light beam in a manner consistent with stereoscopic image data to form first and second modulated images having substantially orthogonal polarization states. Projection optics project the modulated images onto a display surface.
Abstract:
A system and method for use in projecting stereoscopic images for three-dimensional presentation are disclosed. The system includes a dual-lens configuration for imparting different circular polarizations to two sets of images such that one set of images has a polarization orientation orthogonal to that of the other set of images. The dual-lens system includes at least one component for enhancing heat transfer among various elements in the system.
Abstract:
Proposed are various embodiments of projection systems that generally provide stereoscopic images. The projection systems act to split a spatially separated image in a stereoscopic image frame and superimpose the left- and right-eye images on a projection screen with orthogonal polarization states. The embodiments are generally well suited to liquid crystal polarization based projection systems and may use advanced polarization control.
Abstract:
Polarization preserving front projection screens and diffusers provide optimum polarization preservation for stereoscopic 3D viewing, as well as improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed screens direct light from a projector toward viewers within a diffusion locus, while maintaining optimum gain characteristics. More specifically, light incident on a region of the front projection screen from a predetermined projection direction is reflected by an engineered surface to a predetermined diffusion locus after undergoing substantially single reflections. The engineered surface, comprised of generating kernels, is used to optimally diffuse illumination light into a range of viewing angles, within the diffusion locus, with suitable gain profile, while optimally preserving polarization for 3D applications. Such a screen, when combined with matched polarization analyzing eyewear, provides extremely low cross-talk from any observation point.
Abstract:
Projection screens for projection of binocular stereoscopic images include a metallic projection surface that includes a plurality of depressions configured to produce left and right viewable light fluxes in response to received left and right modulated light fluxes. The metallic projection surface can be formed by beadblasting, and multiple panels can be secured together by welding or other process. Projection surfaces can also be formed by molding or otherwise forming a conductive surface on a dielectric or other substrate.