Abstract: A sensor for measuring the properties of light from a light source is disclosed. The sensor includes first and second photodetectors that are illuminated by the light. The first and second photodetectors generate first and second photodetector signals indicative of the first and second weighted averages of the intensity of light in a wavelength band between 400 nm and 700 nm. The first photodiode is more sensitive to light having wavelengths between 400 nm and 500 nm than the second photodetector. The sensor also includes a color temperature processing circuit that generates a first processed signal that is related to a ratio of the first and second signals. The color temperature processing circuit could include first and second logarithmic amplifiers that generate first and second logarithmic signals, respectively, from the first and second photodetector signals and a subtraction circuit that forms a signal indicative of the difference between the first and second logarithmic signals.

Abstract: In accordance with the invention, a display apparatus including a light source is provided, the light source having at least one superluminescent light emitting diode (SLED), the apparatus further having at least one light modulating device arranged in a beam path of a light beam emitted by the light source and operable to emit influenced light upon incidence of the light beam, the light modulating device being operatively connected to an electronic control, the display apparatus further having a projection optics arranged in a beam path of the influenced light.

Abstract: A lighting apparatus is provided. The lighting apparatus includes a power supply housing section, a circuit board housing section, a light source housing section, a cutout portion, and a light source. An image recorded on a record medium is displayed in the state that an end portion of the power supply housing section and an end portion of the record medium secured to the cutout portion are placed on a surface where the lighting apparatus is placed.

Abstract: The present invention provides a drive system for an optical light modulation system employing multiple light modulation element pairs. The each pair is driven by a single motor which drives one axis around which one element of the first pair rotates while the other element of the first pair free floats and rotates about a second axis. While the second axis drives the rotation of the first element of the second pair and the first axis provides a rotation pivot for the second element of the second pair. Thus the two pairs share the two axises providing a more compact drive system that can be used more flexibly in an optical train of an automated multiparameter lighting system.

Abstract: A lighting device surface-emits light from a light emitting surface of a light emitting element and guides the emitted light using a light guide member. The lighting device has a first wavelength conversion member for converting light emitted from the light emitting device into light having a first peak wavelength and a second wavelength conversion member for converting light emitted from the light emitting device into light having a wavelength shorter than the first peak wavelength. The first wavelength conversion member is provided between the light emitting element and the light guide member and is contained in a resin potting the light emitting element. A film has a layer containing the second wavelength conversion member. The film is provided on a light emitting surface side of the light guide member.

Abstract: A display device includes an ultraviolet light source, a color light source, and a filter selectively hit by their lights. The filter has a first area part for displaying the first display contents excluding an overlapped parts when the ultraviolet light is emitted, a second area part for the second display contents excluding the overlapped parts when the color light is emitted, and a third display part for displaying the overlapped parts when one of the ultraviolet and color light is emitted. The first area part blocks the color light and produces visible light when the ultraviolet light hits the first area part, the second area part allows the ultraviolet and color lights to pass therethrough, and the third area part allows the ultraviolet and color lights to pass therethrough and produces the visible light when the ultraviolet light hits the third area part.

Abstract: A light-emitting diode light source system includes a plurality of light-emitting diode modules for providing light beams; a light-combining unit including a plurality of light incident sides and a light emerging side, the light beams from the light-emitting diode modules entering the light-combining unit via the light incident sides, respectively, and emerging out of the light-combining unit via the light emerging side; a plurality of primary lens units disposed between the light-emitting diode modules and the light incident sides, respectively; a secondary lens unit disposed to confront the light emerging side; and a focusing lens disposed adjacent to the secondary lens unit, the secondary lens unit being disposed between the light-combining unit and the focusing lens, the light beams from the light-emitting diode modules passing through the primary lens units, the light-combining unit, the secondary lens unit and the focusing lens to be projected onto a light valve.

Abstract: An infrared lighting device for motor vehicles, for example a headlight, has a radiation source and a filter, whereby the device emits white and infrared radiation at a certain intensity in a wavelength range between 800 and 1200 nm on one axis, and the filter at a first angle may transmit a first visible part and at a second angle different from the first may transmit a second visible part of the radiation source, and both parts transmitted form white light.

Abstract: The invention relates to an illumination system comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a portion of the light emitted by the radiation source and emitting light of a wavelength different from that of the absorbed light; wherein said at least one phosphor is a green-emitting cerium-activated lutetium-aluminum-garnet of general formula (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb wherein 0<x<1, 0<y<1, 0<z£0.1, 0<a£0.2 and 0<b£0.1. The invention also relates to with a green-emitting cerium-activated lutetium-aluminum-garnet of general formula (Lu1-x-y-a-bYxGdy)3(Al1-zGaz)5O12:CeaPrb wherein 0<x<1, 0<y<1, 0<z£0.1, 0<a£0.2 and 0<b£0.1.

Abstract: Methods and apparatus for generating and modulating white light illumination conditions. Examples of applications in which such methods and apparatus may be implemented include retail environments (e.g., food, clothing, jewelry, paint, furniture, fabrics, etc.) or service environments (e.g., cosmetics, hair and beauty salons and spas, photography, etc.) where visible aspects of the products/services being offered are significant in attracting sales of the products/services. Other applications include theatre and cinema, medical and dental implementations, as well as vehicle-based (automotive) implementations. In another example, a personal grooming apparatus includes one or more light sources disposed in proximity to a mirror and configured to generate variable color light, including essentially white light, whose color temperature may be controlled by a user.

Abstract: A light fixture includes first and second flexible materials coupled to first and second scrolling mechanisms that move the material in first and second directions to position a selected portion of the first and second flexible materials in first and second parts of a light beam from the fixture. A device coupled to the first and second mechanisms may move the first and second mechanisms in third and fourth directions so that third and fourth parts of the light beam do not pass through the first and second flexible materials. The third and fourth directions are different than the first and second directions. Different areas of the first and second flexible materials may produce different colors. The light fixture may also include a third scrolling mechanism coupled to a flexible diffusion material, to diffuse at least a part of the light beam by a predetermined amount.

Abstract: A color filter includes a red filter segment, a green filter segment and a blue filter segment, on a substrate, wherein when a pseudo-white LED is used, an area of a triangle defined by three chromaticity points of the red, green and blue filter segments expressed as (xR, yR), (xG, yG) and (xB, yB) on the x-y chromaticity diagram occupies 72% or more of an area standard triangle defined by defined by 3 points of red (0.67, 0.33), green (0.21, 0.71) and blue (0.14, 0.08), and the color filter has a color temperature of 6000K or more. Each of the red, green and blue filter segments has a thickness of 3.3 ?m or less. A liquid crystal display device includes such color filter and the pseudo-white LED.

Abstract: A light source device includes a light emitting diode (LED) device, a lens and a light diffusing layer. The LED device includes an LED chip, which emits light, and a fluorescent, which converts a part of the light from the LED chip. The lens is located on a side of a light emitting face of the LED device. The light diffusing layer is located between the LED device and the lens. An air layer exists between the light diffusing layer and the LED device or between the light diffusing layer and the lens.

Abstract: An underwater light that can include a mounting assembly attachable to a pool wall without having to make a niche in the wall, a housing coupled to the mounting assembly and including a light source cavity, a reflector in the light source cavity, a light source in front of the reflector, and a lens in front of the light source. The lens can include a plurality of contiguous parallel concave lens elements extending in a single direction to disperse light perpendicular to the single direction. The underwater light can include a removable lens cover that is at least one of red, green, yellow, and blue, in order to shine colored light into the pool.

Abstract: A backlight unit that converts ultraviolet light emitted from light-emitting lamps into visible light is disclosed. The backlight unit also reflects the visible light, thus achieving improved luminance. The backlight unit includes a plurality of light-emitting lamps arranged substantially in parallel, an outer case that fixes and supports the light-emitting lamps, and a reflection sheet disposed within the outer case and containing a fluorescent material that converts ultraviolet light into visible light and reflects the visible light.

Abstract: A structure for providing a collimated light beam includes a light source configured to emit light having a first peak wavelength combined with a group of structures configured to direct at least a portion of light exiting the light source in a direction substantially perpendicular to a top surface of the light source and reflect another portion. In some embodiments, a wavelength converting element is positioned in a path of light emitted from the light source, the wavelength converting element configured to absorb at least a portion of the light having a first peak wavelength and emit light having a second peak wavelength. The group of structures may be formed over the wavelength converting element, such that the wavelength converting element is disposed between the group of structures and the light source.

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 light emitting device includes a light emitting element, an optical concentrator, such as a compound parabolic concentrator, a dichroic filter between the light emitting element and the optical concentrator and a wavelength converting material, such as a phosphor. The optical concentrator receives light from the light emitting element, via the dichroic filter, and emits the light from an exit surface, which is smaller than the entrance surface. The optical concentrator may be manufactured from a material with a high refractive index, such as sapphire. The wavelength converting material is, e.g., disposed over the exit surface. The radiance of the wavelength converting material is increased by pumping the wavelength converting material through a high index of refraction material and outputting the converted light into a low refractive index medium, such as air.

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: A biological growth plate scanner includes a multi-color illumination system that illuminates a biological growth plate with different illumination colors. A monochromatic image capture device captures images of the biological growth plate during illumination of the growth plate with each of the illumination colors. A processor combines the images to form a composite multi-color image, and/or individual components of the composite image, and analyzes the composite image to produce an analytical result such as a colony count or a presence/absence result. The biological growth plate scanner may include both front and back illumination components. The back illumination component may include a diffuser element disposed under the biological growth plate. The diffuser element receives light from one or more laterally disposed illumination sources, and distributes the light to illuminate a back side of the biological growth plate.

Abstract: A method for improving color purity of a light source module is provided. The light source module includes a light source suitable for emitting color lights with different wavelengths and a transparent cover encapsulating the light source. In the method, a light filtering material is coated on or doped into the transparent cover to absorb part of the color lights with specific wavelengths. Besides, a light source module which adopts the method is provided.

Abstract: A luminescent assembly has a housing, at least one shortwave light source, at least one shortwave light reflecting cover and a primary visible light source. The shortwave light source is mounted with the housing and emits shortwave light when electricity is applied to the shortwave light source. The shortwave light reflecting cover covers part of the shortwave light source. The primary visible light source, which is significantly larger than the shortwave light source, is a fluorescent/phosphorescent coating formed on part of the housing opposed to the shortwave light cover, and emits visible light when shortwave light is irradiated from the shortwave light source and reflected by the shortwave light reflecting cover.

Abstract: A light-filtering module includes a light-source module, a dichroic mirror and a first image unit. The light-source module outputs a light beam. The dichroic mirror divides the light beam into a first colored light and a dual colored light. The first image unit provides the first colored light with image information. The light-filtering module includes a light-filtering unit and a driving unit. The light-filtering unit located between the dichroic mirror and the first image unit is located at a light path of the first colored light. The driving unit includes a coupling element coupled to the light-filtering unit and a driving element utilized to drive the coupling element. The driving element drives the light-filtering unit, switching between a first status and a second status by the coupling element, and a wide-wavelength spectrum and a narrow-wavelength spectrum are provided when the light-filtering unit is in the first and second statuses, respectively.

Abstract: A light source unit includes a light source made up of a reflector having a lamp accommodating opening and a light exiting opening, and a lamp having a bulb for emitting light and electrode introducing portions which guide electrodes into the bulb. In addition, the light source unit includes an anomalous lens which is disposed to collect light emitted from the light source to be situated on an optical axis of the light emitted from the light source, and a condenser lens for collecting light which has exited from the anomalous lens. The lamp is inserted into the reflector from the lamp accommodating opening, and the bulb is disposed within the reflector so that a position of a focal point of radiated light which is reflected from an inner wall of the reflector is not situated on the electrode introducing portions and the anomalous lens, but is situated between the electrode introducing portions and the anomalous lens, forming a circle centered at an optical axis of the radiated light.

Abstract: Three light sources are provided as a light source. A first light source emits a light in red, a second light source emits a light in green, and a third light source emits a light in blue. Each light source is a light source in which a plurality of LEDs (light-emitting diodes) are arranged in the same plane surface. The first light source, the second light source, and the third light source are arranged on the same plane surface. Furthermore, lines connecting the first light source, the second light source, and the third light source form a triangle. Light fluxes (primary optical axes) of each light source are parallel with each other. The first light source, the second light source, and the third light source are arranged on one piece of a cooling plate.

Abstract: A light emitting device includes: a light emitting element which includes a first electrode layer, a second electrode layer, and a light emitting function layer disposed between the first electrode and the second electrode; a reflection layer which reflects light emitted from the light emitting function layer toward the light emitting function layer; and a translucent semi-reflection layer which is disposed opposite the reflection layer with the light emitting function layer interposed therebetween to reflect some of the light emitted from the light emitting function layer toward the light emitting function layer and to transmit the remainder of the light, wherein the translucent semi-reflection layer has a refractive index of 1 or more.

Abstract: There is provided a discharge lamp lighting apparatus including a dimmer circuit which is provided with a control means to dynamically adjust screen brightness according to an input signal, and a control means to adjust screen brightness based on a user's operation. The dimmer circuit includes: an amplitude adjusting circuit to superpose a first dimming control signal composed of a DC voltage onto a second dimming control signal composed of a pulse width modulation signal; an integration circuit to integrate an output of the amplitude adjusting circuit; and a comparison circuit to compare an output of the integration circuit with a triangular wave having a predetermined frequency thereby generating a dimming signal, wherein a burst dimming mode is performed according to the dimming signal.

Abstract: An illumination device (1, 1A, 1B) is disclosed. The illumination device (1, 1A, 1B) contains an organic light-emitting component (2, 2A, 2B, 2C, 2C?) containing a functional layer sequence (23, 23A) for generating light, a light passage area (7, 7A, 7B), which is provided for coupling out light emitted by the organic light-emitting component (2, 2A, 2B, 2C, 2C?) from the illumination device (1, 1A, 1B) and for coupling ambient light into the illumination device (1, 1A, 1B) a retroreflector (5, 5A, 5B), which is provided for reflecting at least part of the ambient light coupled in through the light passage area (7, 7A, 7B) back to the light passage area (7, 7A, 7B). The organic light-emitting component (2, 2A, 2B, 2C, 2C?) is embodied such that it is at least partly light-transmissive. The functional layer sequence (23, 23A) of the organic light-emitting component (2, 2A, 2B, 2C, 2C?) is arranged between the light passage area (7, 7A, 7B) and the retroreflector (5, 5A, 5B).

Abstract: A lamp receptacle of a projection apparatus includes a receptacle body defining a receiving space, and having a peripheral wall and an upper opening. The peripheral wall is formed with an aperture. A fixing element is attached securely to the peripheral wall above the aperture, and protrudes into the receiving space. A filter glass is disposed in the receiving space behind the aperture in the peripheral wall. A holding frame is disposed behind the filter glass, and has a central hole aligned with the aperture. A mounting arm has a vertical section integrally formed with an upper section of the holding frame, and a horizontal section extending frontward from the vertical section to overlap and fasten the upper fixing element, thereby retaining the holding frame in such a manner to urge the filter glass to abut against the peripheral wall around the aperture.

Abstract: A light-emitting device has a base, a light-emitting chip and a light emitter. The light-emitting chip is made of semiconductor material, and is mounted on the base. The light-emitting chip generates the primary light. The light emitter includes fluorescent material being excited by the primary light to emit a secondary light. The light emitter has a first surface with uneven surface texture.

Abstract: An illuminating device includes: a lamp device that includes a lamp body, which is a light source, and a concave reflector for reflecting light emitted from the lamp body; and a lens member that has a planar optical surface and a nonplanar optical surface opposite to the planar optical surface and is provided on an emission side of the lamp device. In the illuminating device, the lens member is arranged such that a normal line of the planar optical surface is slightly inclined at a predetermined angle with respect to an optical axis of the lamp device. The lens member is arranged such that light beams substantially parallel to the optical axis are incident on the planar optical surface, and a filter that reflects at least one of an ultraviolet ray and an infrared ray is provided on the planar optical surface.

Abstract: A lighting fixture having a color-changing mechanism, such as a color wheel, for cycling through a plurality of colors, such as by rotating, at a first speed and a second speed. The second speed is faster than the first speed. A position pulse device, such as a position sensor, generates a reference position pulse when the color-changing mechanism is at a predetermined color or position. A circuit periodically generates a master pulse. A control device causes the color-changing mechanism to cycle through the colors at the second speed when the reference position pulse is generated after the master pulse.

Abstract: A light source device includes a light-condensing device that condenses an illumination light that is emitted from a light source lamp. The light-condensing device includes at least one lens, a lens holder in which a lens is fixedly provided, and a lens holding member. The lens holding member is a member for fixing a lens to the lens holder. The lens holding member causes at least one circumferential portion of the lens to protrude to the lens holder side, and causes the optical axis of the lens to match the optical axis of the illumination light.

Abstract: The present invention is a multi-purpose light source of a unique design and specialized attachments which are also independently unique that can be used for, but not limited to, Dental, Medical, Cosmetic, and Industrial applications and procedures. Specifically the spectral irradiance of the light source can be controlled in such a way as to allow it to be used for procedures currently performed by lasers, electrosurgical devices, and hand instruments while retaining the benefits of the light source for other uses such as the photo-initiation of resins, tooth whitening, fluorescence, and illumination. The present invention may be used instead of a laser either independently or in conjunction with electrosurgical devices and hand instruments.

Abstract: For mixing different light colors from different LEDs or energized phosphors, an elongated mixing tunnel is used having a reflective inner surface. LEDs of different colors are optically coupled along the length of the mixing tunnel and at a first end of the tunnel. Light coupled along the length of the tunnel is reflected by an angled dichroic mirror that selectively reflects the incoming color light towards a single output port of the mixing tunnel. The dichroic mirror passes all other colors of light being transmitted towards the output port of the tunnel. Two, three, or more colors of LEDs can be used. Efficient and compact ways to energize phosphors are also described. Other optical techniques are also described.

Abstract: An illumination system having a light source, an integration rod and a color wheel is provided. The light source is suitable for providing a light beam. The light integration rod and the color wheel are disposed in the transmission path of the light beam. The color wheel is disposed between the light source and the light integration rod. The light integration rod has a light input end adjacent to the color wheel and a light output end opposite the light input end. The light integration rod has two indentations at the light input end to form an airflow channel. The noise caused by the rotating color wheel is reduced through the airflow channel.

Abstract: A light source for fluorescence microscopy is designed to provide relatively constant illumination (lumens) of the specimen over the useful life of the light generator, such as the bulb, arc, or filament. In another aspect, the present invention provides for a light source for fluorescence microscopy designed to reduce heat transmission to optical components from the light generator, while providing adequate transmission of the required excitation wavelengths of light.

Abstract: There is disclosed a method and apparatus for successively and repeatedly illuminating a number of remote areas collectively defining a larger area with light in the form of a beam or beams to induce a physiological blink response or optical blink reflex in the illuminated eye of an animal (e.g., a human) within the area being illuminated. Each area being intermittently illuminated long enough to induce a blink response from an animal (e.g. human) subject there, after which another area(s) is illuminated in the meantime while illumination of the initial area is not required since the subject(s) there would still be recovering from their blink response.

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: An apparatus for illumination having a housing suited for in ground use, which contains at least one lamp which is surrounded by a reflector, a controller for controlling the lamp and light changing means. To reduce the content of moisture, air containing evaporated water is able to be released from the lamp to the surroundings and only air without moisture is allowed to enter the in-ground lamp.

Abstract: A low-profile edge-lit backlight apparatus includes a light guiding plate which guides light introduced from a side by utilizing total reflection on a light emitting surface as one principal surface and a light reflecting surface as the other principal surface and emits light from the light emitting surface based on surface emitting, and a plurality of white light emission units that emit white light incident on the light guiding plate. The white light emission section includes a light source group of a first light emitting diode to emit first primary color light, a second light emitting diode to emit second primary color light, and a third light emitting diode to emit third primary color light which are arranged in a row, and a color mixing section that generates white light by mixing the first primary color light, the second primary color light, and the third primary color light.

Abstract: A light cover has a transparent element manufactured from polycarbonate and an infrared filter angled so as to reflect infrared radiation emitted from a light source way from both the transparent element and the light source.

Abstract: In an optical circuit including multi-dimensional photonic crystals, in which the optical circuit has a structure (33), such as a light emitting member or a light receiving member, having a natural resonance frequency, another structure (34) having a natural resonance frequency slightly differing from the natural resonance frequency of the structure (33) is arranged in the vicinity of the structure (33) to control the directivity of localization and propagation of an electromagnetic field, light emission and light reception in a spatial region including the above structures in the multi-dimensional photonic crystals, in order to permit functional operations to be realized.

Abstract: Illumination systems and related components and methods are disclosed.

Abstract: A method and/or apparatus is provided for constructing a dichroic color mixing flag for a multiparameter light that greatly improves the thermal shock tolerance of the flag and avoids having to use a more costly quartz substrate material as in the prior art.

Abstract: A field sequential lighting device for emitting light corresponding to a plurality of colors using a field sequential method includes: a light source; and a light converting section for intensifying the emitted light by sequentially converting the light, emitted from the light source, corresponding to the plurality of colors. By doing this, it is possible to provide a field sequential lighting device using the light emitted from the light source efficiently and having desirable color reproducibility, and an image projecting device having it.

Abstract: The present invention concerns a method for replacing optical elements and a light fixture containing at least one light source for illumination, including a system for fastening and replacing at least one optical element by means of magnetic attachment. It is the purpose of the invention to achieve rapid replacement of optical components in connection with a light fixture. Another purpose is that this replacement may occur without using tools and without the operator interfering with the preload of the fastening. The purpose may be achieved by a light fixture, if the optical element and the light fixture include at least two interacting magnetic interlocking pairs, the interlocking pairs including at least one permanent magnet, where at least the permanent magnet of the interlocking pair is disposed in a magnetically non-conducting material. Hereby it becomes possible for an operator to replace optical components in a very large number of light fixtures rapidly and without risking damage to the components.

Abstract: A plug-in radiation source module (10) for mounting and locating a radiation source (3) for a weathering apparatus (20), the plug-in module (10) being configured to be insertable from without into a cavity (21) provided therefor in a weathering apparatus (20).

Abstract: A wash light optical system for use with a light beam generator includes a converging optical element that reduces the size of a light beam from the light beam generator, a color filtration mechanism that is capable of filtering the reduced light beam to a selected one of two or more colors, a spreading optical element that increases the size of the filtered light beam, and a beam shaping optical element. The optical system may also include a dimming mechanism that is capable of reducing the intensity of the light beam to a selected one of two or more intensities. The optical system may be enclosed in a housing that includes a coupling mechanism capable of detachably mounting the housing to the light beam generator.

Abstract: A method and apparatus that effectively filters infrared light from fluorescent lighting and that is easily adapted to typical fluorescent lighting and assemblies. A fluorescent lighting fixture includes a cover for filtering the infrared light from a fluorescent light source of the fixture. The cover includes an infrared filter for substantially preventing emission of infrared light from the fluorescent lighting fixture and a protective layer for preventing damage to the infrared filter.