Abstract: A reflective film includes interior layers that selectively reflect light by constructive or destructive interference, the layers extending from a first to a second zone of the film. In the first zone the layers provide a first reflective polarizer characteristic, and in a second zone the layers provide a substantially different reflective polarizer characteristic. The second zone is characterized by at least some of the layers having a reduced birefringence relative to their birefringence in the first zone. In some cases the first reflective polarizer characteristic may have a pass axis that is substantially orthogonal to that of the second reflective polarizer characteristic. The film may have substantially the same thickness in the first and second zones, or a substantially reduced thickness in the second zone relative to the first zone.

Abstract: Nanorods assemblies that have lengths in excess of 50 microns to meters are formed from contacting rice-shaped colloidal superparticles that are aligned along the long axis of the colloidal superparticles. The rice-shaped colloidal superparticles are formed from a multiplicity of nanorods with a high degree of association that is end to end to form colloidal superparticles that are in excess of three microns in length and have a length to diameter ratio of about three or more. Methods of preparing the rice-shaped colloidal superparticles employ mixing with an additional ligand to the nanorods to bias the self assembly of the nanorods by solvophobic interactions. Methods of preparing the nanorods assemblies include the infusion of the rice-shaped colloidal superparticles into microchannels patterned on a substrate, wherein the rice-shaped colloidal superparticles' long axes align in the microchannels.

Abstract: In a head lamp 1, relative positions of a laser light guide path in a tapered light guide section 20 and a parabolic mirror 5 are fixed. An optical fiber 10 and the tapered light guide section 20 are each provided so as to have a receiving end part where laser light is received and an emitting end part where laser light is emitted. The emitting end part of the optical fiber 10 is located near the receiving end part of the tapered light guide section 20.

Abstract: A coupling-in apparatus is provided for coupling light from a light-emitting diode (1) into a fiber entry end (5) of at least one optical fiber (3). The coupling-in apparatus has a changing device (7) and a first light-guide element (13-19) arranged on the changing device (7). The first light-guide element (13-19) has specific transmission properties, an entry end (27) and an exit end (29). The changing device (7, 107) can be arranged and moved into a position with respect to the light-emitting diode (1) and the fiber entry end (5) such that the entry end (27) of the light-guide element (13-19) lies opposite the light-emitting diode (1) and the exit end (29) of the light-guide element (13-19) lies opposite the fiber entry end (5).

Abstract: A backlight and a liquid crystal module having the same are provided. The backlight comprises: a light guide plate, a light-guide-plate fixing element for fixing the light guide plate, and at least one light source disposed adjacent to the light guide plate, wherein the light-guide-plate fixing element is made of thermal-contractive material. As the light-guide-plate fixing element is made of thermal-contractive material, in a test environment of high temperature and high humidity, it is possible to ensure that the light guide plate can expand and contract freely without resistance; meanwhile; while at normal temperatures, as the tight-guide-plate fixing element is in contact with the light guide plate without gap therebetween.

Abstract: Provided is a backlight assembly and a liquid crystal display including: a light source; a light guide plate; and a bottom chassis comprising an accommodating portion, a light source cover configured to accommodate the light source, a first sidewall, and a second sidewall, the accommodating portion comprising a first accommodating portion and a second accommodating portion detachably coupled with each other, wherein the light source cover is formed on a first edge of the first accommodating portion, the first sidewall is formed on a second edge of the first accommodating portion, and the second sidewall is formed on an edge of the second accommodating portion.

Abstract: A variety of light-emitting devices are disclosed that are configured to output light provided by a light-emitting element (LEE). In general, embodiments of the light-emitting devices feature a light-emitting element, a scattering element that is spaced apart from the light-emitting element and an extractor element coupled to the scattering element, where the extractor element includes, at least in part, a total internal reflection surface. Luminaires incorporating light-emitting devices of this type are also disclosed.

Abstract: A light-emitting package allowing light to enter a thin lightguide plate efficiently has a package substrate 11, light-emitting elements 2 mounted on the package substrate, a transparent resin part 12 sealing the light-emitting elements on the package substrate, a cut portion 12a formed in the transparent resin part in parallel to the package substrate so as to be able to receive a side edge surface of a lightguide plate, and a reflecting layer 13 formed on the entire surface of the transparent resin part except the cut portion.

Abstract: A backlight unit includes a light source that emits light and a light guide plate disposed adjacent to the light source. The light guide plate includes an incident surface to which light is incident, an exit surface from which light incident through the incident surface exits, a reflection surface facing the exit surface to reflect the incident light, and a plurality of lenticular protrusions disposed on the exit surface. The reflection surface includes an inclined surface proximal to the incident surface and inclined with respect to the exit surface.

Abstract: A color deviation balance thin film, a side-type backlight module and a liquid crystal display device. The color deviation balance thin film is applied to the side-type backlight module and the thickness of the color deviation balance thin film is gradually reduced along the backlight irradiation direction. The color deviation balance thin film is arranged in the side-type backlight module and the side-type backlight module with the color deviation balance thin film is arranged in the liquid crystal display device. When the side-type backlight module with the color deviation balance thin film is applied to the liquid crystal display device, the intensity difference of light at different positions along the backlight irradiation direction can be reduced, and the problem of the color deviation generated in the display picture can be effectively improved.

Abstract: The invention provides an illumination device comprising a waveguide having a first face, a second face, and a waveguide edge. The device further comprises a LED light source, wherein the LED light source is arranged to couple at least part of the light source light into the waveguide element. The device also comprises a first transmissive reflector, arranged at the first face side, and a second transmissive reflector, arranged at the second face side. The LED light source, the waveguide, the first transmissive reflector, and the second transmissive reflector, are arranged to generate the first and second light in a direction away from the first face and in a direction away from the second face, respectively. Such an illumination device may allow lighting of a room, for instance via the ceiling with uplight, and lighting of a specific area in the room with downlight.

Abstract: A multicore fiber according to an aspect of the present invention includes a plurality of cores and a cladding surrounding the plurality of the cores. In this multicore fiber, a pair of cores is arranged and disposed on a linear line passed through the center of the cladding, the pair of the cores being adjacent to each other and having refractive indexes varied differently from the cladding to the cores.

Abstract: A colored optical fiber including a glass optical fiber; a primary coating layer that covers the glass optical fiber; a secondary coating layer that covers the primary coating layer; and a colored layer that coats the secondary coating layer. The relaxation modulus after 24 hours at 60° C. of of the layers coated is 140 MPa or less.

Abstract: A method of manufacturing a radiation-resistant optical fiber and a thus-obtained radiation-resistant optical fiber, the method includes the following steps: a) manufacturing a silica optical fiber preform; b) forming, in the preform, a longitudinal cavity; c) drawing the preform so as to form an optical fiber (1) including a core (2), an optical cladding (6) and at least one longitudinal cavity (3) having at least one opening (13) at one end of the optical fiber (1); d) applying, during step c) of fiber drawing, a gas-tight coating (4); e) exposing the optical fiber (1) to a gaseous substance, including preferably gaseous hydrogen and/or gaseous deuterium, in such a way to incorporate the gaseous substance in silica via the opening (13); and f) closing any opening (13) at both ends of the optical fiber.

Abstract: Provided is an optical fiber having a W-type refractive-index profile and having a reduced bend loss at a practically used bend radius. The optical fiber of the invention comprises: a core; an inner cladding enclosing the core and having a refractive index smaller than the refractive index of the core; and an outer cladding enclosing the inner cladding and having a refractive index which is smaller than the refractive index of the core and larger than the refractive index of the inner cladding, whereas the bend radius Rt is 25 mm or less when ? ? ? ( R ) ? R is the minimum, the bend loss at the bend radius R being ?(R).

Abstract: The disclosure is directed at a waveguide sandwich which comprises a pair of host materials, each of the host materials housing a component waveguide. The component waveguides are then placed in physical contact with each other to form a composite waveguide thereby producing a waveguide sandwich.

Abstract: Apparatus and methods for stripping tight-buffered optical fibers are disclosed. The methods include removing a portion of the buffer layer and thin-coating layer to expose the bare fiber at the optical fiber end, wherein the cuts to the optical fiber needed to strip the optical fiber are made simultaneously. In some methods, a portion of the cover is used to clean the bare fiber as the cover portion is removed. In other methods, the normal force that secures the cover is alleviated so that the cover portion can be removed without breaking the bare fiber. Different apparatus configured to effectuate the stripping methods are disclosed.

Abstract: A tunable resonant system is provided and includes a microsphere that receives an incident portion of a light beam generated via a light source, the light beam having a fundamental mode, a waveguide medium that transmits the light beam from the light source to the microsphere, and a polarizer disposed in a path of the waveguide between the light source and the microsphere. The incident portion of the light beam creates a fundamental resonance inside the microsphere. A change in a normalized frequency of the wavelength creates a secondary mode in the waveguide and the secondary mode creates a secondary resonance inside the microsphere.

Abstract: An optical fiber connector for coupling light to or from an input fiber is disclosed. The connector includes a first alignment member that holds an achromatic GRIN lens. The achromatic GRIN lens has a half-pitch axial length L, wherein 0.5 mm?L?5 mm. The optical fiber connector has a field fiber that interfaces with the achromatic GRIN lens. The connector is operable between operating wavelengths of 800 nm and 1600 nm with a coupling loss of less than 0.2 dB.

Abstract: Embodiments are provided for an apparatus and method for differential thermal optical switch control. The optical switch is operated based on the interferometric principle by modifying the optical phase between waves propagating in waveguides via refractive index change in the waveguides using the thermo-optic effect. A heat pump designed as part of the optical switch is used to generate a temperature difference across the waveguides based on the thermo-electric effect. The thermo-electric effect is obtained using thermo-electric material or elements, also referred to as Peltier elements. An embodiment apparatus includes a dielectric base, a pair of waveguides extended in parallel on the dielectric base, and on the dielectric base a thermo-electric material in contact with the pair of waveguides. Additionally, a pair of electrodes extended, on the thermo-electric material, next to and along the length of the waveguides.

Abstract: An optical rotary transmitter which ensures the reliable transmission of optical signals in conjunction with a comparatively simple construction comprises two parts spaced apart from one another which are rotatable relative to one another about a common centre axis and the first of which comprises a first circular light coupler (10) and the second of which comprises a second circular light coupler (20). The light entrance and light exit surfaces of the two light couplers face one another. Each of the light couplers (10, 20) consists of collimators (11, 21) combined to form a respective collimator arrangement (16, 26), optical coupling elements (15, 25) being connected to said collimators.

Abstract: An adapter block constructed to mount to more than one mounting configuration of a telecommunications panel. The adapter block including a housing constructed to slide mount to a panel, and pivot mount to a panel from either a front or a rear of the panel. The housing including flexible levers that provide a snap-fit connection to secure the adapter block relative to the panel in each of the mounting configurations. The adapter block providing access to cable terminations of the block in each of the mounting configurations.

Abstract: The connection device for liquid-core optical fiber comprises a sleeve traversed by a channel comprising a plurality of communicating stacked conduits, a first conduit being formed from an end of the sleeve and being arranged to receive, in a sealed manner, at the corresponding end of the sleeve, one end of the optical fiber, and a second conduit being formed communicating with the first conduit, and closing means that hermetically seal the end of the second conduit opposite the end that communicates with the first conduit, the sleeve further having a third conduit for filling the internal volume of the second conduit when the latter is closed at one end by the closing device and the fiber is inserted into the first conduit, the third conduit transversely connecting the outside of the sleeve with the inside of the second conduit, and a sealing plug for hermetically sealing the port of the third conduit opening to the outside of the sleeve.

Abstract: A fiber optic connector and fiber optic cable assembly is disclosed. The assembly includes a fiber optic cable having a plurality of optical fibers. The assembly also includes a connector body, a multi-fiber ferrule and a protective housing. The fiber optic cable is anchored to a proximal end of the connector body and the multi-fiber ferrule is mounted at a distal end of the connector body. The multi-fiber ferrule supports end portions of optical fibers of the optical fiber cable. The protective housing mounts over the connector body. A dimensionally recoverable sleeve prevents contaminants from entering the protective housing through a proximal end of the protective housing. A dust cap and sealing member prevent contaminants from entering the protective housing through a distal end of the protective housing.

Abstract: The MT ferrule adapter for adapting an MT ferrule assembly into an MPO connector-type structure for endface inspection includes an upper jaw and a lower jaw rotatable relative to each other between an open position and a closed position. In the open position, the MT ferrule of the MT ferrule assembly can pass through the rear end of the MT ferrule adapter to be received in upper recesses of the lower jaw. In the closed position, the MT ferrule is fixedly held between lower recesses of the upper jaw and the upper recesses of the lower jaw with the front surface of the MT ferrule protruding out in front of the MT ferrule adapter. The MT ferrule adapter in the closed position has the same outer contour as MPO connectors so that the MT ferrule held in the MT ferrule adapter may be inspected by conventional MPO connector inspectors.

Abstract: The present invention provides a multi-channel transceiver module comprising a unitary housing having a first channel body and a second channel body. Each channel body includes a male plug end and a receptacle plug end. A bridge member is provided for joining the first and second bodies. The bridge members disposed at the receptacle end. A gap is provided between the plug ends of each channel body. The gap extends from each plug end to the bridge member to partially divide each channel so that each plug end is insertable within a separate receptacle cage.

Abstract: An optical fiber attaching section, a photoelectric conversion device attaching section, and a lens are integrally formed by a light-transmitting resin material. The optical fiber attaching section is formed concentrically with an optical axis OA of the lens. A contact surface for the photoelectric conversion device in the photoelectric conversion device attaching section is formed having a tilt in relation to a plane that is perpendicular to the optical axis OA. As the photoelectric conversion device, a photoelectric conversion device is attached in which a contact surface for the photoelectric conversion device attaching section is formed in parallel with a light-receiving surface of a light-receiving element.

Abstract: The sealing component 1 of the invention is provided with a metallic housing 19 that comprises a base part 19a, a side wall 19b connected to the base part 19a and an opening portion 19c facing to the base part 19a, and a metallic lid 20 to cover the opening portion 19c, wherein a melted portion 24 is formed around the boundary between the lid 20 and the upper edge 19b1, the melted portion 24 is formed to reach the corner 19b3 of the side wall 19b, and the melted portion 24 has a convexly-curved outward form 24a from the top face of the lid 20 to the corner 19b3 in the longitudinal cross-sectional view of the sealing component 1.

Abstract: An optical module includes a first ferrule, a second ferrule that is aligned with the first ferrule via a positioning pin, a housing including a support part that supports the second ferrule, and a ferrule clip that is fastened to the housing and presses the first ferrule toward the second ferrule.

Abstract: A grommet for use with a fiber optic enclosure having an opening adapted to receive the grommet so as to provide a substantially sealed passage for one or more fiber optic cables passing through the grommet and the opening. The grommet comprises a U-shaped central portion defining an inner face and a first portion of an outer face of the grommet, where the inner face and outer face are separated by a first thickness. The U-shaped central portion further includes a thinned, penetrable region at or near a center area of the U-shaped central portion and forming part of the first portion of the outer face of the grommet, the thinned, penetrable region having a second thickness substantially smaller than the first thickness.

Abstract: Provided is an apparatus including: a housing having a splitter compartment; a multiple fiber adapter attached to an exterior of a front housing wall of said housing; a multiple fiber connector connected to said multiple fiber adapter and disposed in an interior of the front housing wall of said housing; an optical splitter in said splitter compartment of said housing; an input fiber optically connected to said optical splitter; and a plurality of output fibers optically connected to said optical splitter and said multiple fiber connector, wherein the housing includes a hinge plate corresponding to a bottom housing wall perpendicular to the front housing wall of said housing in a closed state and mounted on a hinge affixed to said housing at an intersection between the bottom housing wall and a rear housing wall opposite from the front housing wall.

Abstract: A splice cassette includes a base and a cover. The base includes an outer channel and an inner storage region separated by a spool wall. The cover is configured to mount to the base to enclose the inner storage region. The outer channel extends radially outwardly from a perimeter of the cover. The cover includes guide spools and a chip receiving arrangement disposed on an inwardly-facing surface that faces the base when the cover mounts to the base. The splice chip remains on the cover when the cover is removed from the base.

Abstract: An optical waveguide pumping method can include pumping a liquid fluid through a conduit, thereby pumping an optical waveguide into the conduit, and operating a fluid recovery device, so that fluid pressure in the conduit is less than a vapor pressure of the fluid and/or fluid temperature in the conduit is reduced from above a boiling point temperature of the fluid to below the boiling point temperature of the fluid. An optical waveguide pumping system can include a pump which pumps a liquid fluid into a conduit and thereby pumps an optical waveguide into the conduit, and a fluid recovery device connected to the conduit. The fluid recovery device reduces fluid pressure in the conduit to below a vapor pressure of the fluid and/or reduces fluid temperature in the conduit from above a boiling point temperature of the fluid to below the boiling point temperature of the fluid.

Abstract: A fiber splice enclosure is provided. The fiber splice enclosure includes an enclosure, a cover, a chassis, and a cable port mounting plate for allowing entry and exit of cables. The cable port mounting plate is removably fastened to the enclosure and the chassis.

Abstract: A self-locking cable clamp arrangement includes a bracket and a flexible tab disposed on the bracket. The bracket has a cable mounting region, a first engagement region, and a support region disposed therebetween. A cable can be clamped to the cable mounting region. The support region defining two members spaced apart sufficient to enable an edge of the panel to extend partially therebetween. The flexible tab can be selectively coupled to the cable mounting region and to the first engagement region. The clamp arrangement mounts to the panel by sliding the bracket downwardly through an open-ended slot defined in the panel until the tab is received within a cutout portion of the panel to secure the bracket to the panel.

Abstract: Embodiments of the invention include an apparatus including an optical fiber having a distal end configured to emit a beam of energy. The apparatus also includes a tube including a tube channel. The distal end of the optical fiber is disposed in the tube channel. The apparatus further includes a shock absorber disposed on the tube and a cap disposed on the shock absorber.

Abstract: In one embodiment of the invention, an apparatus is provided including a linkage and a balancing mechanism coupled to the linkage around a pivotal joint. The linkage couples to a support structure at a first end and support a weight applied to a second end. The balancing mechanism counter balances the weight applied to the second end of the linkage. As the linkage is deformed to vertically adjust the height of the weight with a different moment arm length, the balancing mechanism varies a cable path length to modify the compression of a spring and a tension in a cable to adjust the amount of counter balance force applied to the linkage.

Abstract: The invention provides a temperature balancing device for a projection objective of a lithography machine. The device comprises at least one temperature sensor, at least one heat-absorbing light-transmitting layer and an objective temperature balancing control unit, wherein the temperature sensor is disposed adjacent to the projection objective for sensing the temperature difference of the projection objective in different areas; the heat-absorbing light-transmitting layer is positioned below the projection objective for absorbing radiation energy in the laser beams transmitted from the lithography machine and transmitting the laser beams; and the objective temperature balancing control unit is used for controlling the absorption degree and light transmission degree of the heat-absorbing light-transmitting layer according to the temperature difference sensed by the temperature sensor. The invention also discloses a method for balancing temperature of a projection objective of a lithography machine.

Abstract: Described herein are press fit optical vias to interconnect different levels of an electronic or electro-optical device, printed circuit board or connector. A device includes a device level having an optical component and another device level having another optical component. A press fit optical via interconnects the device level and the another device level. A press fit optical includes a barrel having a length for interconnecting between the device level and the another device level, an insertion point at an end of the barrel, and a lens at another end of the barrel. It includes an extraction collar between the lens the barrel, an insertion limit face between the extraction collar and the barrel, and a rotation key extending from the extraction collar and the insertion limit face. A plurality of swages are interposed on the barrel and the insertion limit face.

Abstract: An imaging lens assembly includes, in order from an object side to an image side: an aperture stop; a first lens having a positive refractive power; a second lens having a negative refractive power; a third lens having a positive refractive power; a fourth lens having a negative refractive power. A focal length of the imaging lens assembly is f, a focal length of the first lens is f1; a focal length of the second lens is f2; a curvature radius of the object side surface of the first lens is R1; a curvature radius of the image side surface of the first lens is R2; a curvature radius of the object side surface of the second lens is R3; a curvature radius of the image side surface of the second lens is R4, and the lens assembly satisfies the following conditions: 1.08?f1/f?1.20; ?4.00?f2/f??2.50; ?1.50?(R1+R2)/(R1?R2)??1.25; 1.30?(R3+R4)/(R3?R4)?5.00.

Abstract: There is provided a lens module including: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power; a fifth lens having negative refractive power and having a shape in which an image-side surface thereof is convex; and a sixth lens having refractive power, having a shape in which an image-side surface thereof is concave, and having at least one point of inflection formed on the image-side surface thereof.

Abstract: A compact high-resolution imaging lens which provides a wide field of view of 80 degrees or more and corrects various aberrations properly. Designed for a solid-state image sensor, the imaging lens includes constituent lenses arranged in the following order from an object side to an image side: a first positive (refractive power) lens having a convex object-side surface; a second negative lens having a concave image-side surface; a third positive lens as a double-sided aspheric lens having a convex object-side surface; a fourth positive lens having a convex image-side surface; a fifth lens as a double-sided aspheric lens having a concave image-side surface; and a sixth negative lens having a concave image-side surface. The image-side surface of the sixth lens has an aspheric shape with a pole-change point in a position off an optical axis.

Abstract: A zoom lens includes in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a negative refractive power, and a fourth lens group having a positive refractive power, and at the time of zooming, the first lens group is fixed, the second lens group moves, the third lens group moves, and the fourth lens group is fixed. The first lens group includes in order from the object side, a negative lens, a reflecting optical element, and a positive lens. The second lens group includes in order from the object side, an aperture stop, a positive lens, a cemented lens having a negative refractive power, and a positive lens. The cemented lens includes a positive lens and a negative lens.

Abstract: A lens apparatus includes, in order from an object side: a first lens unit; an aperture stop; and a positive second lens unit. The first lens unit includes, in order from the object side, a first negative lens, a second negative lens having at least one aspheric surface, and a positive lens. The second lens unit includes at least one negative lens and at least two positive lenses. The first and second negative lenses of the first lens unit are meniscus lenses having a surface convex toward the object side. The focal length of the optical system, the focal lengths of the first and second lens units, the mean values of Abbe constants of the positive lens and the negative lenses of the first lens unit, and the mean values of Abbe constants of the positive lenses and the negative lenses of the second lens unit are appropriately configured.

Abstract: An imaging lens includes an object-side lens group having positive refractive power; an aperture stop; and an image plane-side lens group having positive refractive power, arranged in this order from an object side to an image plane side. The object-side lens group includes a first lens having positive refractive power; a second lens having negative refractive power; and a third lens having positive refractive power. The image plane-side lens group includes a fourth lens having positive refractive power; and a fifth lens having negative refractive power. The first lens has an aspheric shape to have negative refractive power increasing toward a lens periphery from an optical axis, and has a surface on the object side having a positive curvature radius. The first to third lenses have specific focal lengths to satisfy specific conditions. The first to fifth lenses have specific Abbe's numbers to satisfy specific conditions.

Abstract: A compact microplate imaging system, including: a tunable light source; a lens ensemble to collimate the light source onto the microplate and to transmit light that is reflected from the microplate; a beam splitter to divert a portion of the reflected light; an imaging lens to collect diverted light and to produce an optical image of the at least one sensor of the microplate; and an image sensor for receiving the optical image of the at least one sensor of the microplate. A method for interrogating a sensor using the compact microplate imaging system, as further defined herein, is also disclosed.

Abstract: A zoom lens includes, in order from an object side toward an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power. The second lens unit, the third lens unit, and the fourth lens unit are moved during zooming. A position of the third lens unit at a telephoto end is closer to the object side than a position of the third lens unit at a wide-angle end. The focal length of the zoom lens at the wide-angle end, the difference in the position of the second lens unit on an optical axis between that at the wide-angle end and that at the telephoto end, and the focal length of the second lens unit are set appropriately.

Abstract: A zoom lens includes, in order from an object side to an image side, first to third lens units having negative, positive, and negative refractive power, respectively, and a rear lens group including a plurality of lens units and having overall positive refractive power, a distance between every adjacent lens unit included in the zoom lens is variable during zooming. The second lens unit moves in a direction nonparallel to an optical axis during image shake correction, the third lens unit moves in an optical axis direction during focusing, each of the second and third lens units consists of a single lens element, and a focal length of the entire zoom lens at a wide-angle end, a focal length of the second lens unit, and a focal length of the third lens unit are appropriately set.

Abstract: A zoom lens includes a first lens group having negative refractive power, a second lens group having positive refractive power and a third lens group having positive refractive power. The second lens group is disposed between the first lens group and the third lens group. The second lens group includes at least an aspheric glass lens. Through using the aspheric glass lens, the imaging quality of the disclosed zoom lens is not sensitive to temperatures changes.

Abstract: This disclosure provides systems, methods and apparatus for a beam pattern projection device that includes a modulating array of light sources. In one aspect, the beam pattern projection device may include a lens. The array of light sources can be positioned such that its output plane is substantially one focal length away from the lens along the optical axis. The output of the array of light sources can be controllable to create an adjustable beam pattern out of a plurality of possible beam patterns that are each associated with a power level of each light source in the array of light sources. The device can project at a distance the adjustable beam pattern created by the array of light sources.