Sarnoff Corporation

Trumpf Photonics, Inc.

Algen Design Services Incorporated

Herschel Clement Burstyn

George Herbert Needham Riddle

Leon Shapiro

Bawa Singh

Gerard Argant Alphonse

Glenn Arthur Reitmeier

Arthur Herbert Firester

Dennis John Bechis

Joseph Thomas McGinn

Perry Niel Yocom

Donald Barry Carlin

Carl C Steinmetz

Ralph Anthony Stanziola

Michael J Lurie

David Lloyd Staebler

An anti-piracy system introduces distortion into a recorded image, while maintaining a high quality projected image. The video source material includes modulated entities for providing artifacts incompatible with the content of the video source material and selectively deliverable information that the projection system uses to demodulate the entities. A projector receives the information about the modulated entity and corrects, or demodulates, the entity. The projection system also imposes a recording device dependent interference on the projected images.

Cinema anti-piracy measures

A method and apparatus is disclosed for introducing alterations or distortions in projected images. The distortions on the projected image are imperceptible to a human viewer. The distortions are recorded on recording devices and observable upon viewing the recorded images.

Method and apparatus for film anti-piracy

A color display apparatus and method for displaying colors using radiation sources uses displays that may include multiple radiation sources, a display surface and control hardware and software that enable accurate and reproducible color display. Another apparatus provides means for generating colors upon request and communicating digital information regarding the generation of the color spectrum to local or remote display devices. The apparatus may be used in selecting and ordering colors subject to supplier constraints. Methods for displaying colors and enabling display of the colors in remote locations, as well as methods for conducting business by communicating the color display information are all provided.

Color display device

A retractable screen system suitable for portable, hand held computing and communication units joins a number of optical sheets to form a rollable, extendible and retractable projection sheet. The resulting folded optical system provides a lightweight, portable unit. Telescoping arms allow the screen to be extended and stowed quickly and easily. High screen resolution is afforded by multiple mechanisms that scan concurrently. Beam indexing of the screen permits the precise alignment via feedback, and an embodiment fit for military, command and control applications.

Retractable rear projection display

A mode matching gain element for an optical system is described, that supports a single mode of the optical signal, and that matches the incoming wavefront to a required outgoing wavefront. The incoming wavefront is passed through a phase conjugating structure, and the mode of the gain element is matched to the mode of the input and output optic fibers. The phase conjugating structure includes lenses or mirrors which time-reverse the incoming signal.

Phase conjugating structure for mode matching in super luminescent diode cavities

Large visual displays are comprised of an array of smaller display devices or modules, each of which displays a portion of the image to be displayed so that together the array of smaller display devices displays the complete image. Unlike conventional large displays which necessarily seek to minimize the edge areas of the smaller display elements that do not display an image so as to minimize the &ldquo;seams&rdquo; or gaps between the image portions, the present display device projects image portions scanned from less than the entire display area of the smaller display devices in an array to create an image on a substantially flat panel that is substantially free of visual &ldquo;seams&rdquo; or gaps between the image portions. Thus the display device may employ display elements that do not have narrow edges and that are not contiguous to generate overlapping sub-images. Image pixels in what would otherwise be &ldquo;seams&rdquo; or gaps are generated from the image data and are displayed in proper position and brightness in the displayed image, such as in the overlap regions of overlapping sub-images. Where the scanning beams are electron beams, the flat panel is a faceplate that includes phosphors that are excited by the electron beam to produce light, and where the beams are light beams, the flat panel is a distributor of light, such as a diffuser panel.

Modular display system

A rear projection system provides for reduced cabinet depth by folding the optical path with polarization sensitive mirrors. In one aspect, the projector outputs linearly polarized light to a quarter-wave polarizing sheet, which circularly polarizes the projector output. A mirror directs the projected light back through the quarter-wave material to a polarization-dependent reflector. The light has a reflective polarization state. The polarization-dependent reflector reflects the light back to the quarter-wave material and mirror. Upon traversing the path a second time, the light is in a transmissive polarization state.

Compact rear projection system using birefringent optics

An image projection system includes an image generator, a screen and a focus and aim component. The focus and aim component receives modulated light from the image generator and focuses and deflects the light as a function of a position on the screen. The component consists of an array of lenslets with wedge. The wedge or prism refracts the light and the lens focuses the light. As a result, the optics are selectively tailored to provide a clear image over the entire field of view, even in systems compact in depth that would otherwise rely on a short focal length lens. Acute incidence angles at the periphery of the screen are handled by TIR Fresnel lens elements or by diffractive elements. The focus and aim capability is alternatively provided by holographic elements in a holographic array.

Focus and aim device and method for image projection

A rear projection imaging system includes a light collimator, a curved turning mirror and a projector source. The projector source is operable to anamorphically project an image along a projection path that includes optics, such as a cylindrical lens. The optics imposes a first Scheimpflug condition on the system. The projection path proceeds onto the light collimator, but first reflects from the curved turning mirror. The curved turning mirror imposes a second Scheimpflug condition on the system.

Compact rear projections system

An optical system for generating light includes a doped fluoride fiber which is used to convert energy of light at a first frequency, supplied by an optical pump, to light at a second frequency. The second frequency may be lower (down-conversion) or higher (up-conversion) than the first frequency. The optical pump is coupled to the doped fiber. A reflector may be placed at each facet of the doped fiber to form a laser cavity. The reflectors at the facets of the fiber are tuned to a desired emission frequency of the fiber. The laser cavity may be formed either by two substantial reflectors, each positioned at a facet of the doped fiber, or by a substantial reflector, positioned at one facet of the fiber, and a partial reflector, positioned at the other facet of the fiber. When two substantial reflectors are used, other means, such as a wavelength division multiplexer or diffraction grating may be provided in the laser cavity fiber, to provide an output path for the light at the second frequency. For example, the optical system may be used to generate laser light in image projection systems. In particular, the optical system may be used to produce laser light at three primary colors of the visible spectrum, such as, red, green, and blue wavelengths. An optical system with a broad emission spectrum may also be formed by co-directional or contra-directional pumping of a doped fiber. For broad band emission a reflector may placed at one facet the doped fiber and the second facet is ground at an angle so that a laser cavity is not formed.

All solid-state power broadband visible light source

A color display system comprises a radiation generator in which the intensity of at least four wavelength bands can be controlled to reproduce a desired color. The system includes an intensity modulator that generates a multiplicity of modulation control signals each corresponding to a respectively different one of the wavelength bands. A multi-wavelength radiation source provides a plurality of narrow-band radiation signals, each corresponding to a respectively different one of the wavelength bands. The radiation source is responsive to the control signals to control the intensity of each of the narrow-band radiation signals to provide a plurality of modulated narrow-band radiation signals. The plurality of narrow-band radiation signals are combined to reproduce the desired color.

Growing community of inventors

Princeton, NJ, United States of America

Herschel Clement Burstyn