Abstract: A remote light wavelength conversion device is provided for converting a source light emitted from a light source within a source wavelength range into a converted light within a converted wavelength range. The remote light wavelength conversion device may include a waveguide and a color conversion optic. The waveguide may include a first end and a second end and the color conversion optic may be adjacently located at the second end of the waveguide. The color conversion optic may convert the source light transmitted through the waveguide to the converted light. The waveguide may be a fiber having a core diameter of less than about ten micrometers.

Abstract: A light source device includes an excitation light source, a light guide member and a wavelength conversion unit. The wavelength conversion unit includes an optical element disposed on an optical axis and with which excitation light emitted from the light guide member is irradiated to reflect, scatter, or diffract the excitation light, a wavelength conversion member disposed on an optical path of the excitation light reflected, scattered, or diffracted by the optical element to convert the excitation light into wavelength converted light and an emission opening portion that emits the wavelength converted light converted by the wavelength conversion member.

Abstract: An artificial lighting system. The artificial lighting system generates electromagnetic radiation at a source location, and outputs the electromagnetic radiation at a target location. The output is in the form of electromagnetic radiation in the visible spectrum and/or photosynthetically active radiation. In some embodiments, the electromagnetic radiation is focused and distributed through one or more lenses to provide increased intensity. For target locations that are physically remote from the source location, optical waveguides and components distribute the electromagnetic radiation. Some embodiments incorporate an automated emitter allowing the output of the artificial lighting system to be moved at the target location. The artificial lighting system seeks to provide high intensity electromagnetic radiation to the target while minimizing the exposure of the target to the heat generated by the light source.

Abstract: In one embodiment, a system may include an electrical device having an indicator light source, an actuator having a window, a viewing piece arranged to be visible through the window, and a light guide arranged to guide light from the light source to the viewing piece. The viewing piece may have a receiving portion arranged to receive light from the light guide, and the width of the receiving portion may be substantially larger than the width of the light guide. In another embodiment, a system may include an electrical device having a first support member, and an actuator having a second support member. The actuator may be adapted to move along a path of motion from a retracted position to an extended position, and the first and second support members may be adapted to support the actuator in the extended position with forces that are substantially balanced along the path of motion.

Abstract: Methods and systems are described herein for an article of manufacture for use in a weapon sight wherein the article of manufacture comprises a passively charged photoluminescent material. When installed in a weapon sight, the passively charged photoluminescent material provides light to a fiber optic of the weapon sight during low light conditions to illuminate a reticle pattern of the weapon sight.

Abstract: A remote light wavelength conversion device is provided for converting a source light emitted from a light source within a source wavelength range into a converted light within a converted wavelength range. The remote light wavelength conversion device may include a waveguide and a color conversion optic. The waveguide may include a first end and a second end and the color conversion optic may be adjacently located at the second end of the waveguide. The color conversion optic may convert the source light transmitted through the waveguide to the converted light.

Abstract: An image display device comprises a light-emitting unit (1), an optical fiber (2) which transmits light emitted from the light-emitting unit, and a plurality of spheres (3) disposed so as to be coupled to the optical fiber (2) by evanescent coupling and having optical transparency. Each of the spheres (3) produces an optical mode in which light entering each sphere from the optical fiber (2) by the evanescent coupling is confined inside, and are so formed that predetermined resonant frequencies of the spheres for producing the optical mode are different from one another, so that an image is displayed by the light emitted from the spheres (3). This provides a simply structured image display device having a high response speed and capable of achieving power saving, a high luminance, a wide view angle, and a high contrast.

Abstract: The present invention relates to a gaming machine having a light source and one or ideally a series of lighting positions that are illuminated, via optical pathways that are suitably in the form of optical fibers that transmit light from the light source to the or each lighting position. The light source may have a light filter that operably controls the color and intensity of light illuminating from the lighting positions depending on the outcomes of the game being played. The present invention also relates to a network of the gaming machines and a centralized light source, wherein optical pathways, suitably in the form of optical fibers, transmit light from the light source to the light positions of two or more gaming machines. The network may also include a controller to control illumination of the lighting positions, including color of the light and intensity of the light based on data received from an outcome determiner of one or more of the machines of the network.

Abstract: The present invention provides a light source device for emitting concentrated light, which is prepared by concentrating light emitted from a light source, including: the light source; a reflective box in which the light source is provided; a plurality of light guides having a circular column shape or a polygonal column shape and having two end surfaces being different in area; and light separating means, the reflective box having a plurality of openings, each opening being provided with one of the light guides in such a way that the end surface smaller in area faces the light source, and each light separating means being provided at a position between the adjacent ones of the openings. With this, a small-sized light source device for emitting light with high output and high directivity, and a simulated solar light irradiation device including the same are provided.

Abstract: Light-coupling systems and methods that employ light-diffusing optical fiber are disclosed. The systems include a light source and a light-diffusing optical fiber optically coupled thereto. The light-diffusing optical fiber has a core, a cladding and a length. At least a portion of the core comprises randomly arranged voids configured to provide substantially spatially continuous light emission from the core and out of the cladding along at least a portion of the length. A portion of the light-diffusing optical is embedded in an index-matching layer disposed adjacent a lower surface of a transparent sheet. Light emitted by the light-diffusing optical fiber is trapped within the transparent sheet and index-matching layer by total internal reflection and is scattered out of the upper surface of the transparent sheet by at least one scattering feature thereon.

Abstract: An optical waveguide system with an electrodeless plasma lamp as the electromagnetic radiation source. The system includes an optic source coupling element that receives the electromagnetic radiation that is emitted from at least one electrodeless plasma lamp. The optic source coupling element is coupled to at least one optical waveguide element. The optical waveguide element includes at least one fiber optic cable that is capable of transmitting the emitted electromagnetic radiation. The fiber optic cable can be positioned such that the electromagnetic radiation is transmitted at a desired position away from the electrodeless plasma lamp source.

Abstract: A hybrid light source system is disclosed. The hybrid light source system adapted to be used in a projection apparatus comprises a dichroic component, a first light source, a second light source and a light processing component. The dichroic component defines a light path, with the first light source capable of generating a first light which is projected towards to the dichroic component along the light path and the second light source capable of generating a second light which is projected towards the dichroic component along the light path and opposite to the first light. The first light comprises a first sort of light beams and a second sort of light beams, in which the first sort of light beams and the second light are guided by the dichroic component to form a hybrid light and travel into the light processing component along the light path.

Abstract: A light-emitting device, comprising: a radiation source (5), which emits radiation having a first wavelength, an optical waveguide (10), into which the radiation emitted by the radiation source is coupled, and a converter material (15), which converts the radiation transported through the optical waveguide (10) into light (20) having a second, longer wavelength. A light-emitting device of this type can have an improved light conversion efficiency.

Abstract: An illumination system and a projection device comprising the same are provided. The projection device further comprises an imaging system. The illumination system comprises a first light source, a dichroic element and a wheel plate. The dichroic element comprises a first dichroic portion and a second dichroic portion. The first light source provides a first wave band light, which is reflected to the wheel plate by the first dichroic portion. When being projected onto a wave band transforming area of the wheel plate, the first wave band light will be transformed into a second wave band light by the wave band transforming area and then emits through the first dichroic portion and the second dichroic portion. When being projected onto a reflecting area of the wheel plate, the first wave band light will be reflected by the reflecting area to emit through the second dichroic portion.

Abstract: A two-dimensional wedge shaped UV and IR filter is formed by or substantially same size pieces of glass forming a two-dimensional wedge. The wedge reflects radiation in four different directions.

Abstract: A light source device includes an excitation light source which generates excitation light, a fluorescent member containing a fluorescent substance which absorbs the excitation light to generate fluorescence, an emitting side optical member which is provided on an emitting end face of the fluorescent member, and a reflector which is provided on the side surface of the fluorescent member. The reflector has an optical property of reflecting the excitation light and the fluorescence. The emitting side optical member has an optical property of reflecting the excitation light and transmitting the fluorescence.

Abstract: An optical device is for receiving light from a light source, the light source having an emission wavelength. The optical device includes an elongated light guide, a first end of the light guide configured to receive light from the light source; and a phosphor disposed on a second end of the light guide, an excitation wavelength of the phosphor substantially similar to the emission wavelength of the light source. The light guide is formed of a material configured to dissipate at least some heat generated by the light source.

Abstract: The present invention relates to a super continuum light source comprising a pump source arranged to emit light having a center wavelength ?center arranged to provide pump pulse to a generator fibre, where the refractive index profile of the core is arranged to allow modal cleaning of the light is it propagates, such as via stimulated Raman scattering. An example of invention is the application of a relatively high power pump laser utilized to provide an optical super continuum with relatively high spectral density and/or good beam quality even though the pump laser may provide a beam with a high M2.

Abstract: Since an information processing unit of the present invention includes a protrusion portion on a back face side of a first casing, it is possible to reduce an impact transmitted to a notebook PC when the notebook PC is placed in an upright position on the surface of a desk. Therefore, it is possible to prevent the notebook PC from being damaged. Furthermore, since the protrusion portion is provided to the back face side of the first casing, it is possible not to allow the notebook PC to stand self-supported in an upright position. Therefore, the notebook PC will not be placed carelessly in an upright position on the surface of a desk or the like; thus, it is possible to prevent the PC from being broken or damaged due to a fall.

Abstract: A swept wavelength light source is provided, the light source includes a semiconductor gain device operable to provide amplification, an optical retarding device, the retarding device having a block of material, a beam path with a well-defined beam path length being defined for light within the block of material produced by the gain device, a wavelength selector, and the gain device, the retarding device and wavelength selector being mutually arranged on the base so that a resonator is established for light portions emitted by the gain device and selected by wavelength selector; this does not exclude the presence of further elements contributing to the resonator, such as additional mirrors (including resonator end mirrors), lenses, polarization selective elements, other passive optical components, etc.; wherein the beam path in the retarding device is a part of a beam path of the resonator.

Abstract: A display device for increasing brightness of an image generation, including a color cluster system, is provided. The system includes a first color LED cluster having at least a first LED of a first wavelength within a first color range and a second LED of a second different wavelength within the first color range. The light from the first LED may be combined at least partially with light from the second LED The system further comprises a second color LED cluster having at least a first LED of a first wavelength within a second color range and a second LED of a second different wavelength within the second color range. In the second color LED cluster, the light from the first LED may be combined at least partially with light from the second LED.

Abstract: To provide a backlight device with which a color hue and a color purity of a display panel can be improved while suppressing the lowering of the brightness of the display panel. A backlight device (20) comprises a pseudo white LED (21), a light guide plate (22), and a dichroic filter (25) which reflects a light with a predetermined wavelength among the light emitted from the pseudo white LED at a predetermined ratio. The dichroic filter is configured so that the light reflectance changes when the incident angle of the light is changed and a tilt angle to a light emitting surface (21e) of the pseudo white LED can be adjusted.

Abstract: A lighting device (1600, 1700, 1800, 1900) is disclosed, comprising a plurality of light sources (102, 111, 119, 120, 1403,1408, 1410, 1410, 1508, 1510, 1512) providing light in different wavelengths, a first collimating means (104, 1400, 1500) having a receiving end (103, 1402) and an output end (114, 1404) wherein said light sources are arranged at said receiving end, and said collimating means comprising a set of dichroic filters (109, 110, 115, 116, 117, 118, 1409, 1411, 1413, 1509, 1511, 1513) arranged as sub-collimators (106, 107, 108) to each of said plurality of light sources such that, for each light source, said sub-collimator collimates the light from its light source, and said dichroic filter of said each light source is translucent for light from adjacent light sources of different wavelength such that mixed and collimated light is outputtable at said output end; and a mixing rod (1604, 1704, 1804, 1904) having a receiving end (1805) and an output end (1806), wherein said first collimating means

Abstract: A display apparatus includes a plasma display panel (PDP) having an upper substrate at which black matrices are disposed. The apparatus includes an external light shield having a panel side facing a display surface of the PDP and an opposing viewer side facing away from the display surface. The light shield includes a base unit and includes pattern units that absorb external light from the viewer side. The pattern units have boundaries defined by intersections of the pattern units and the base unit. The boundaries define widths of pattern tops disposed toward the panel side or the viewer side and define widths of pattern bottoms disposed toward the other of the panel side and the viewer side. A distance between a pair of adjacent black matrices is 4 to 12 times greater than a distance between adjacent boundaries, of a pair of adjacent pattern units, at adjacent pattern bottoms.

Abstract: An optical waveguide system with an electrodeless plasma lamp as the electromagnetic radiation source. The system includes an optic source coupling element that receives the electromagnetic radiation that is emitted from at least one electrodeless plasma lamp. The optic source coupling element is coupled to at least one optical waveguide element. The optical waveguide element includes at least one fiber optic cable that is capable of transmitting the emitted electromagnetic radiation. The fiber optic cable can be positioned such that the electromagnetic radiation is transmitted at a desired position away from the electrodeless plasma lamp source.

Abstract: Disclosed herein are light collectors for use in projection applications. The light collectors gather light from surface emitting sources (e.g., LEDs) of differing color (or same color in some embodiments) using input lightpipes. A light collection system splits the light into orthogonal linear polarization states and efficiently propagates the light by use of a polarizing beamsplitter (PBS) and a reflecting element. Further, the light collection system may efficiently homogenize the light using an output lightpipe in a lightpath from the output of the PBS and the reflecting element. In addition, the light collection system may present a single, linear polarization at the output through the use of a half-wave switch (LC cell) in some embodiments or ColorSelect filter in other embodiments. The light collection system may be integrated into a single, monolithic glass, plastic or combination glass/plastic assembly.

Abstract: A light source assembly comprises a light pipe, a first color light source at a first tapered light collector, a second light source at a second tapered light collector, and at least a first dichroic filter operative to pass first color light and to reflect second color light toward a light output port. A light valve may be positioned to receive light from the light pipe. One or more light entrances to the light pipe may have a filter, e.g., a short wave pass filter, oriented in a plane generally parallel to the axial optical pathway.

Abstract: In a lighting apparatus which emits light of a desired wavelength by irradiating excitation light from a light source to a wavelength converting member, a structure is such that a part of wavelength-converted light which is launched from the wavelength converting member is made to launch from an irradiated-light emerging area without making the light incidence again to the wavelength converting member.

Abstract: Illumination systems, which include at least one light source (e.g., LED and/or laser diode), light sensor, and a power source are described. In certain embodiments, a light sensor and a microprocessor are used to detect light emitted by a light source and to adjust the power signal provided to the light source at least partially based on the detected light. Some embodiments may enable the color point and/or brightness of the emitted light to be controlled at least partially based on the detected light. The illumination systems may be designed to be used as a liquid crystal display (LCD), general lighting apparatus, or any other illumination device.

Abstract: A dual objective endoscope for insertion into a cavity of a body for providing a stereoscopic image of a region of interest inside of the body including an imaging device at the distal end for obtaining optical images of the region of interest (ROI), and processing the optical images for forming video signals for wired and/or wireless transmission and display of 3D images on a rendering device. The imaging device includes a focal plane detector array (FPA) for obtaining the optical images of the ROI, and processing circuits behind the FPA. The processing circuits convert the optical images into the video signals. The imaging device includes right and left pupil for receiving a right and left images through a right and left conjugated multi-band pass filters. Illuminators illuminate the ROI through a multi-band pass filter having three right and three left pass bands that are matched to the right and left conjugated multi-band pass filters.

Abstract: A component with a yellow pigment that absorbs light wavelengths in the range 500 to 380 nm is provided for transparent or translucent components of a vehicle in order to protect healthy eyes, pseudophakic eyes, and eyes with macular and retinal degeneration from harmful ultraviolet rays. The component may be in the form of a filter that is applied on or within these transparent or translucent components of the vehicle.

Abstract: An optical component that can be attached to an end portion of an optical guiding member, and a light converting member used in the optical component. The optical component comprises a cap having an engaging portion defining a bore engaged with an end member of a light guiding member, and an arranging portion defining a opening connected to the bore in the engaging portion, and a light converting member disposed in the opening formed in the arranging portion.

Abstract: An illumination device with small light intensity loss, prevents deterioration of directivity, includes a white light source; a first light guiding unit disposed on the white light source optical axis, guiding white light from its source in a radially outward direction perpendicular to the optical axis; a second light guiding unit guiding light going in the radially inward direction to the optical axis; a unit rotating the first and second light guiding units about the optical axis; semiconductor light sources circumferentially disposed radially outward of the second light guiding unit, emitting light in the inward radial direction; and wavelength-range selecting units disposed outward of the first and second light guiding units on opposite sides in the radial direction at circumferential positions different from the semiconductor light sources, select light components in predetermined wavelength ranges of white light from the first light guiding unit and return the light components to the second light guidin

Abstract: Disclosed is a light pipe including a body having a hollow therein, and plural prism sections on an outer surface of the body. Each prism section includes a reflection section, a cross section of which is an isosceles right triangle, and an angle adjusting section. The angle adjusting section has a cross section in the shape of a right-angled triangle, a base side of which is an oblique side of the isosceles right triangle. A vertical angle of the right-angled triangle varies with the position of a light source. Installation of the light source at the center of the cross section of the light pipe is not required, thereby increasing the manufacturing efficiency of the light pipe. The light pipe has an internal surface in various shapes including a cylindrical shape to be applicable to various application fields. Power is saved, and light is transmitted to a remote place.

Abstract: A device is provided for the treatment and prophylaxis of healthy eyes, pseudoaphakic eyes and/or eyes suffering macular and retinal degeneration that comprises a yellow filter applied to a conventional illumination system to protect them from short wavelengths of the visible spectrum under 500 nm and preferably in the range of 350 nm to 500 nm. This device the difficulties and risks of existing ways of protecting eyes undergoing cataract surgery and prevents or improves the degeneration of healthy eyes and those suffering neurodegeneration by the simple application of a protective filter to any lighting system. Embodiments of the invention comprise combining a conventional light source with a conventional yellow filter that absorbs wavelengths of light shorter than 500 nm so that the filter completely covers the illumination source.

Abstract: A multi-primary color display has a backlight source and pixels. Each pixel has at least four sub pixels, which display red primary color, green primary color, blue primary color and a fourth primary color, respectively. At the peak position of the fourth primary color located in the wavelength range between 550 nm˜600 nm, the relative luminance ratio of the fourth primary color to the green primary color is greater than or equal to 0.5. When the ratio of the relative luminance meets the requirement and the relative luminance of a newly added primary color is greater than a certain value, the colors beyond the three-primary color gamut, which includes natural colors and other colors outside the natural color gamut, can be reproduced.

Abstract: A wavelength division multiplexer and etendue conserved optics are used to combine multiple wavelength LED lights into a combined light. The combined light, with higher intensity and higher power than the light from an individual LED, is used to excite a wavelength conversion material such as phosphors to generate a high brightness and high power light. Light generated by multiple LEDs of the same wavelength may be coupled into a optical fiber bundle before inputting it into the wavelength-division multiplexer, further increasing the brightness and power. The wavelength conversion material may generate light of three different color under excitation by different LED lights, or a white light with higher brightness and higher power. Such a light source can be used in image display devices such as a projector or in illumination systems.

Abstract: An LED based illumination system with enhanced brightness is described. The system includes one or more light sources such as LEDs, one or more light couplers for efficiently collecting and collimating the light from the light sources, one or more wavelength selective filters, one or more light concentrators that focus the collimated light, and a cavity made of a layer of wavelength converting material such as a phosphorescent material located at the focus planes of the light concentrators. Each light coupler includes a light tunnel portion and a compound parabolic reflecting portion, and effectively collects and collimates light emitted by the LED in all directions. The wavelength selective filters pass the collimated light from the light sources and reflect light of a second wavelength generated by the phosphorescent material. The lights of both wavelengths exit the light cycling cavity through an aperture.

Abstract: An illumination system is provided for combining two or more light sources. A plurality of light sources radiate random polarization light. A plurality of collecting light pipes corresponds to the plurality of light sources. Each collecting light pipe has an entrance end disposed towards the respective light source. The collecting light pipes are laterally offset and overlapping opposite their respective entrance ends. A combining light pipe is disposed perpendicular to the collecting light pipes. A polarizing beam splitter and a mirror are sequentially arranged in each collecting light pipe essentially opposite the entrance end directing a first polarization light and a second polarization light, respectively upwards towards the combining light pipe. The combining light pipe has an entrance end overlying the polarizing beam splitter and mirror of each collecting light pipe to collect and combine the light from each polarizing beam splitter and mirror.

Abstract: Exemplary embodiments provide a projection-type display apparatus, which can address or realize a reduction in weight and size, a reduction in power consumption, and a reduction in noise, and address or realize a reduction in price, and a control method for the projection-type display apparatus, as well as a control program for the projection-type display apparatus. The projection-type display apparatus includes a solid-state light source that emits light, a mirror device that controls an emitting direction of the incident light to thereby subject the incident light to temporal modulation, and a projecting device that projects the modulated light.

Abstract: A lightening device and a display apparatus are disclosed. A lightening device includes at least one light source installed on a substrate, spaced apart a predetermined distance with each other, and a filter member provided over the light source with a variable thickness, the filter member where light emitted from the light source transmits. A display apparatus includes a panel displaying an image, a front cover supporting a front edge portion of the panel, and a lightening device mounted in an opening portion formed at the front cover, the lightening device being exposed outside. The lightening device includes at least one light source installed on a substrate, spaced apart a predetermined distance with each other, and a filter member provided over the light source with a variable thickness, the filter member where light emitted from the light source transmits.

Abstract: The invention relates to a compensating light guide (10) for guiding visible light (20) from a light source (100). The light guide has a first transmission region (1TR), where light is guided from the light source along a first optical path (1OP), and a second transmission region (2TR), where light is guided from the light source along a second optical path (2OP). The light guided along the second optical path has a larger absorption in a first sub band resulting in an absorption difference between the first and the second optical path. The first (1TR) and second (2TR) transmission regions are optically arranged to transmit light so as to relatively reduce a second sub band of the first spectral distribution. The relative reduction between the first (1TR) and second (2TR) transmission regions is proportionated so as to psycho-visually compensate the absorption difference in the light guide (10) resulting in a uniform color emitted from the light guide (10) as perceived by a viewer (200).

Abstract: There is provided an illuminated surface mounted on a base surface. The illuminated surface includes a plurality of transmissive tiles configured to allow light to pass therethrough. Each of the transmissive tiles includes an exterior surface, an attaching surface and a plurality of lateral sides disposed between the exterior and attaching surfaces. The attaching surface is affixable to the base surface. The transmissive tiles are arranged in spaced relation to each other to define a cable channel. The cable channel is defined by opposing lateral sides of adjacent transmissive tiles. A fiber optic cable is in optical communication a light source and receives light therefrom. The fiber optic cable includes a longitudinal axis and a first segment disposed within the cable channel. The first segment is configured to radially radiate light along the longitudinal axis into the lateral sides of the adjacent transmissive tiles.

Abstract: A ventilation/illumination duct is disclosed which can not only ventilate an indoor space, but also can illuminate the indoor space. A ventilation/illumination system using the ventilation/illumination duct, and a control method for the ventilation/illumination system are also disclosed. The ventilation/illumination system includes a ventilation device for blowing air, a light supplying device for supplying light, a ventilation/illumination duct for not only guiding the air blown by the ventilation device, to ventilate an indoor space, but also totally reflecting the light, to illuminate an indoor space, and a cleaner arranged in the ventilation/illumination duct.

Abstract: A tubular light source having a semiconductor light source and a tube is disclosed. The tube includes a transparent medium, the tube having a side tube surface, a center curve, one end surface, a length, and a maximum cross-sectional dimension. The tube includes scattering centers that cause light traveling in the tube to be reflected at angles such that the reflected light leaves the tube through the side tube surface. The semiconductor light source is positioned to emit light into the tube within a cone of angles such that the light will not leave the side tube surface in the absence of the scattering centers. The scattering centers can be dispersed in the transparent medium or located on the side tube surface. The transparent medium can be rigid or flexible.

Abstract: A multicolor illumination device using an excitation light source and a multi-segmented moving plate with wavelength conversion materials (e.g. phosphors) is disclosed. The exciting light source is a light emitting diode or a laser diode emitting in the UV and/or blue region. The wavelength conversion materials absorb the excitation light and emit longer wavelength light. Each segment of the moving plate contains a different wavelength conversion material or no wavelength conversion material. The plate is supported to move so that different segments are exposed to the excitation light at different times. The plate may be a wheel or rectangular in shape and rotates or oscillates linearly. When the plate moves, light of different colors is generated sequentially in time by the different wavelength conversion materials in different segments of the plate. The multicolor illumination device may be used in a projector system having a microdisplay imager for image display.

Abstract: A lighting assembly topology that utilizes spectrum controlling materials to render the illumination compatible with night vision imaging systems. The lighting assembly can be used as either a general illumination source or can be used as a backlight for a transmissive display such as a liquid crystal display. The lighting assembly makes use of spectral filtering which is both transmissive and absorptive for specific spectral regions. The exit port of the lighting assembly is completely filtered with a red and near infrared reflective filter. The absorption of the near infrared spectrum to which NVIS are sensitive is reflected by the typical near infrared reflective filter covering the exit port and absorbed within the material lining the housing of the lighting assembly.

Abstract: Disclosed herein are light collectors for use in projection applications. The light collectors gather light from surface emitting sources (e.g., LEDs) of differing color (or same color in some embodiments) using input lightpipes. A light collection system splits the light into orthogonal linear polarization states and efficiently propagates the light by using polarizing beamsplitters (PBSs) and a reflecting element to recycle light at a port of the PBS. Further, the light collection system may efficiently homogenize the light using an output lightpipe in a lightpath from the outputs of the PBSs. In addition, the light collection system may present a single, linear polarization at the output through the use of a half-wave switch (LC cell) in some embodiments or ColorSelect filter in other embodiments. The light collection system may be integrated into a single, monolithic glass, plastic or combination glass/plastic assembly.

Abstract: A color changer, particularly for spotlights, comprising at least one dichroic filter which is adapted to be arranged in front of a light source, a motor for moving the at least one dichroic filter which is adapted to place the dichroic filter at least partially in front of the light source, the color changer further comprising an actuator which is adapted to tilt the dichroic filter with respect to the axis of emission of the light source.

Abstract: A multi-lamp arrangement for optical systems comprising two lamps or more (10, 15) and a collective light guide (58), where each lamp is positioned such as to transmit light (20) into respective light guides (36, 46) that are both optically connected to the collective light guide (58). In one embodiment, one of the lamps is optically connected to the collective light guide by means of a mirror (38)-and-prism (40) arrangement and an intermediate light guide (30) and an intermediate mirror (32)-and-prism (34) arrangement. The invention also comprises an augmented color modulator (62) with a number of color fields, where the number of identical color fields are equal to the number of lamps. The invented multi-lamp system will produce a flux level that is equal to or better than known systems but with fewer lamps, thus yielding reduced material cost, manufaturing cost and operating costs, reduced power consumption and reduced product temeperature.