Abstract: A device detects the location of patterned objects in an environment by receiving an optical image and converting the optical image of the lost object into a color digital image. The device employs software to perform an analysis of the color digital image to detect the location of the one or more patterned objects in the environment by using color characteristics of light reflected from a pattern on the one or more patterned objects. The software uses a range of the visible portion of the color space uniquely identified for the light reflected from the pattern on the object and identifies those pixels in the digital image that may be possible targets.

Abstract: 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.

Abstract: The present disclosure relates to increasing the external efficiency of light emitting diodes, and specifically to increasing the outcoupling of light from an organic light emitting diode utilizing a diffraction grating.

Abstract: 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.

Abstract: A device detects the location of objects in an environment by receiving an optical image and converting the optical image of the lost object into a color digital image. The device employs software to perform an analysis of the color digital image to detect the location of the one or more objects in the environment by using color and shape characteristics of the one or more objects. The software uses a range of the visible portion of the color space uniquely identified for the type of object in that environment and identifies those pixels in the color digital image that may be possible targets. Intensity of background and object size are used to exclude pixels as possible target objects.

Abstract: 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.

Abstract: 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.

Abstract: 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 “seams” 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 “seams” 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.

Abstract: 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.

Abstract: A color display apparatus and method for displaying colors using radiation sources are provided. The displays 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.