Abstract: A laser beam (L50) generated by a laser light source (50) is reflected by a light beam scanning device (60), and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a scatter plate is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (B) and irradiates it onto the hologram recording medium (45). At this time, scanning is carried out by changing the bending mode of the laser beam with time so that the irradiation position of the bent laser beam (L60) on the hologram recording medium (45) changes with time. Regardless of the beam irradiation position, diffracted light (L45) from the hologram recording medium (45) reproduces the same reproduction image (35) of the scatter plate at the same position.

Abstract: Systems and methods for providing laser sustained plasma light sources are disclosed. Different from conventional laser sustained plasma light sources where one fiber size and one wavelength combination is used in the lamphouse to generate light for different bands and pixel sizes, switchable fiber sizes and wavelength combinations are provided for optimal power output in different wavelength bands and pixel sizes. More specifically, switchable fiber configurations are provided where larger fibers with higher pump powers are used for bigger pixel sizes and higher wavelength bands while smaller fibers are used for smaller pixel size and shorter wavelength bands. Additionally and/or alternatively, pumping schemes are provided where pump wavelengths close to the absorption peak of the gas fill are used for bigger pixel sizes while pump wavelengths away from the gas fill absorption peak are used for smaller pixel sizes.

Abstract: A reflective back cover made of plastic material having micro cellular structures is processed by compression molding and cutting so as to have a monolithical structure. The white material of the reflective back cover reflects lights such that the back cover can be an integral component featuring multiple functions of various components. With the thickness control of the reflective back cover, a concave can be formed at the side of the back cover where a light source is contained and the concave further retains the light source and its flexible printed circuit board. With the incorporation of the reflective back cover, the thickness of the backlight module can be reduced and a reliable and repetitive manufacturing of the backlight module can be introduced.

Abstract: The present invention discloses a backlight module, which includes: a backplane, which has a sidewall; a light guide plate, which is carried on the backplane and includes a light incidence end section, a light exit surface, and a bottom surface opposite to the light exit surface; a light source, which is mounted on the sidewall and adjacent to the light incidence end section; an intermediate frame, which is set on and covers the light guide plate and the light source; a first retention slot, which is formed in the light incidence end section and has an opening facing the intermediate frame; a second retention slot, which is formed in the light incidence end section and close to the first retention slot and has an opening facing the backplane; a first quantum dot strip, which is received in the first retention slot; and a second quantum dot strip, which is received in the second retention slot. The present invention also discloses a liquid crystal display device.

Abstract: Provided are a backlight unit and a liquid crystal display including the backlight unit. The backlight unit includes a light emitting package, and a light guide plate disposed at one side of the light emitting package. The light emitting package includes a printed circuit board including first regions that are spaced an interval apart from each other and second regions defined between the first regions, light source units disposed on the first regions of the printed circuit board, dummy wiring patterns disposed on the second regions of the printed circuit board, and wiring patterns disposed on the printed circuit board and electrically connected to the light source units.

Abstract: A light source device includes: a light-emitting part; a light guide including in its center a columnar part whose central axis direction is a lengthwise direction, that guides light input into an end face from the light-emitting part, and outputs light from a side face of the columnar part; a light guide holder that covers an end of the light guide except for at least part of the end face; and a support part, including a through-hole that penetrates from one face to another face formed therein, that holds an end of the light guide holder on a side of a first opening on the one face of the through-hole so as to allow sliding in the lengthwise direction, and light is input into the light guide via a second opening on the other face of the through-hole.

Abstract: An object of the present invention is to suppress the brightness distribution in the lighting device. The backlight unit 12 according to the present invention includes an LED 17 as a light source with a light intensity distribution in which light having a peak light intensity travels in a direction inclined with respect to a front direction, a chassis 14 having an opening on a light exit side and housing the LED 17, and a light leading member 22 provided to extend from a mounting surface of the LED 17 toward the light exit side. The light leading member 22 is configured to lead light from the LED 17 toward the light exit side. The employment of the LED 17 with the above light intensity distribution enables an irradiation area A irradiated with the light having the peak light intensity to be larger. This reduces the uneven that may occur in the brightness distribution of the outgoing light.

Abstract: A display device includes a display panel, a backlight unit, a support member, a protection member and a spacing member. The backlight unit includes a printed circuit board on which light emitting blocks are mounted and a light guide. The spacing member presses the printed circuit board against the support member and uniformly maintains spaces between light output surfaces of the light emitting blocks and a light input surface of the light guide.

Abstract: A backlight device includes a light guide plate, a first light source, a second light source, and a positioning portion. The light guide plate has at least one end surface as a light entrance surface and one plate surface as a light exit surface. The first light source is opposed to a first light entrance surface that is a first end surface of the light guide plate. The second light source is opposed to a second light entrance surface that is an end surface opposite from the first light entrance surface of the light guide plate. The second light source is arranged to have a distance from the second light entrance surface relatively greater than a distance between the first light source and the first light entrance surface. The positioning portion is configured to position the light guide plate in a direction in which the first light source, the light guide plate, and the second light source are arranged, and to position the light guide plate with respect to the first light source and the second light source.

Abstract: The disclosure is directed to a system and method of controlling spectral attributes of illumination. According to various embodiments, a portion of illumination including an excluded selection of illumination spectra is blocked, while another portion of the illumination including a transmitted selection of illumination spectra is directed along an illumination path. In some embodiments, optical metrology is performed utilizing the spectrally controlled illumination to enhance measurement capability. For instance, the spectral attributes of illumination utilized to analyze different portions of a sample, such as different semiconductor layers, may be selected according to certain measurement characteristics associated with the analyzed portions of the sample.

Abstract: An optical fiber connector embedded with a Bragg grating includes: a ferrule formed with a reception unit for inserting and fixing a temperature compensation connection port from one end, a space unit extended from the reception unit toward inside, and an optical fiber insertion hole penetrating a side surface of the other end along a center of an axial direction from an inclined surface gradually narrowed toward inside of the space unit; the temperature compensation connection port formed with a connection unit contacting with the reception unit of the ferrule, an optical fiber support unit having an outer diameter smaller than an inner diameter of the space unit of the ferrule from the connection unit and protruding to be spaced apart from an inlet of the ferrule by a predetermined distance to form a space for accommodating the Bragg grating and support an optical fiber, and the optical fiber insertion hole penetrating both ends along the center of the axial direction to insert the optical fiber; an optical

Abstract: A multimode optical fiber includes a central core surrounded by an outer cladding. The central core has a graded-index profile with respect to the outer cladding and an outer radius r1 of between about 30 microns and 50 microns (e.g., between about 35 microns and 45 microns). The optical fiber also includes an inner cladding positioned between the central core and the outer cladding, and a depressed trench positioned between the inner cladding and the outer cladding. The multimode optical fiber exhibits reduced bending losses.

Abstract: An integrated semiconductor device includes a substrate including first, second and third portions; a first waveguide provided on the first portion, the first waveguide including a first base portion containing a first core layer, and a first ridge portion provided on the first base portion; a second waveguide provided on the second portion, the second waveguide including a second base portion containing a second core layer and a second ridge portion provided on the second base portion; and a third waveguide provided on the third portion, the third waveguide including a stripe-shaped mesa containing a third core layer. The second base portion is connected to the first base portion. The second ridge portion is connected to the first ridge portion and the stripe-shaped mesa. The second core layer is formed integrally with the third core layer and is joined to the first core layer by a butt-joint method.

Abstract: An optoelectronics chip-to-chip interconnects system is provided, including at least one packaged chip to be connected on the printed-circuit-board with at least one other packaged chip, optical-electrical (O-E) conversion mean, waveguide-board, and (PCB). Single to multiple chips interconnects can be interconnected provided using the technique disclosed in this invention. The packaged chip includes semiconductor die and its package based on the ball-grid array or chip-scale-package. The O-E board includes the optoelectronics components and multiple electrical contacts on both sides of the O-E substrate. The waveguide board includes the electrical conductor transferring the signal from O-E board to PCB and the flex optical waveguide easily stackable onto the PCB to guide optical signal from one chip-to-other chip. Alternatively, the electrode can be directly connected to the PCB instead of including in the waveguide board. The chip-to-chip interconnections system is pin-free and compatible with the PCB.

Abstract: A laser array optical coupling assembly may be used to couple a laser array to an arrayed waveguide grating (AWG), for example, in an optical transmitter in a wavelength division multiplexed (WDM) optical communication system. The laser array optical coupling assembly may include an optical fiber tip array with polished optical fiber tips providing a reduced mode field diameter to improve coupling efficiency with the laser array. The laser array optical coupling assembly may also include a direct coupling of the laser array to the AWG with modified AWG inputs reducing the mode field diameter to improve coupling efficiency with the laser array. The laser array optical coupling assembly may be used, for example, in an optical line terminal (OLT) in a WDM passive optical network (PON) or in other transmitters or transceivers in a WDM system capable of transmitting and receiving optical signals on multiple channel wavelengths.

Abstract: A micro-truss fabricated of thermosetting polymer and toughened with a coating of thermoplastic polymer. In one embodiment the thermosetting polymer micro-truss is immersed in a solution of thermoplastic polymer in an organic solvent. The immersion causes the micro-truss to absorb the thermoplastic polymer solution and to become coated with the thermoplastic polymer solution. Subsequent drying of the micro-truss leaves a coating of thermoplastic polymer on the micro-truss, and a layer of thermosetting polymer into which the thermoplastic polymer has penetrated. In another embodiment a thermoplastic monomer solution is allowed to diffuse into, and coat, the thermosetting polymer micro-truss, and the thermoplastic monomer is subsequently polymerized.

Abstract: An optical interconnection device includes a light-emitting element, a light-receiving element, and an optical waveguide. Both the light-emitting element and the light-receiving element have a layered structure and are formed on a silicon substrate. At least a portion of the light-emitting element is embedded in an insulator. At least a portion of the light-receiving element is embedded in the insulator. The optical waveguide is formed over the insulator, and is optically coupled to the light-emitting element and the light-receiving element by distributed coupling.

Abstract: An optical fiber fusion splicer includes a base having a fiber groove for containing an optical fiber, a fiber clamp for pressing the optical fiber contained in the fiber groove against the base and load changing means for changing a load for the fiber clamp to press the optical fiber.

Abstract: An optical fiber cable for installation in a subterranean formation, where the temperature could be in excess of 150 degrees C. The optical fiber cable has an outer metallic jacket defining an elongated conduit with an internal elongated channel that receives an optical fiber. The optical fiber has two strands joined by a splice. A splice protector has a body with a passageway receiving the splice. The body has an outer region configured to be joined by a fusion weld to the outer metallic jacket.

Abstract: Devices which operate on gradient optical forces, in particular, nanoscale mechanical devices which are actuable by gradient optical forces. Such a device comprises a waveguide and a dielectric body, with at least a portion of the waveguide separated from the dielectric body at a distance which permits evanescent coupling of an optical mode within the waveguide to the dielectric body. This results in an optical force which acts on the waveguide and which can be exploited in a variety of devices on a nano scale, including all-optical switches, photonic transistors, tuneable couplers, optical attenuators and tuneable phase shifters.

Abstract: Techniques related to optical connectors are described. A ferrule includes an optical pathway for light transmission through the ferrule. In examples, a sub-wavelength grating (SWG) assembly is integrated in the ferrule, aligned with an end of the optical pathway.

Abstract: An apparatus and technique are used to fabricate optical microresonators. A fabrication chamber contains all fabrication materials and devices. The microresonators are fabricated from a glass preform mounted on a motorized spindle. A laser is focused onto the preform to partly or fully impinge on the preform. The laser's focus position is controlled by changing the positioning of a lens mounted on a translation stage. Piezoelectric control elements may be mounted to finished microresonators to control of nonlinear parametric oscillation and four-wave mixing effects of the microresonator, control of nonlinear optical stimulated Brillouin scattering and Raman effects of said microresonator and wideband tuning of the frequency spacing between the output modes of a nonlinear-Kerr-effect optical frequency comb generated with said microresonator.

Abstract: Coupled-resonator optical waveguides (CROW) can be used to control a speed of an optical signal. In particular, the coupling distance between the resonators can be adjusted to precisely control a group delay of an optical wave. Systems and methods are described to control such coupling distance in a CROW.

Abstract: Exemplary apparatus and method can be availed for providing at least one electromagnetic radiation. For example, it is possible to provide at least one first electromagnetic radiation having a frequency that changes over time with a first characteristic period. Further, with at least one hardware arrangement, it is possible to receive and modify the first electromagnetic radiation(s) into at least one second electromagnetic radiation having a frequency that changes over time with a second characteristic period. The second characteristic period can be smaller than the first characteristic period. The hardware arrangement(s) can include a resonant cavity having a round-trip propagation time for the first electromagnetic radiation(s) that can be approximately the same as the first characteristic period.

Abstract: An optical fiber filter device comprises: a first fiber pigtail assembly (110) having a first optical fiber (111), a second fiber pigtail assembly (120) having a second optical fiber (121), a first optical filtering element (114) and a second optical filtering element (124). The first optical filtering element is arranged between a first port (113) of the first optical fiber and a second port (123) of the second optical fiber and is inclined at an angle to an optical axis of the first optical fiber such that a light component within a first wavelength range emitted from the first port is transmitted through the first optical filtering element and enters the second optical fiber via the second port, and a light component within a second wavelength range emitted from the first port is reflected by the first optical filtering element to form a reflected light.

Abstract: Optical systems for wavelength division multiplexing and wavelength division demultiplexing with a multi-core fiber, and methods of their fabrication, are disclosed. In accordance with one method for fabricating an optical system for wavelength division demultiplexing, a resin is molded to define an element with a plurality of angled surfaces. Further, a plurality of filters are formed around the element, where each of the filters is configured to filter at least one respective wavelength and transmit at least one other respective wavelength. In addition, reflective surfaces are formed on the plurality of angled surfaces. Moreover, an additional resin is formed over the element and over the plurality of filters to complete a guiding structure. Further, arrays of photodiodes are affixed to the guiding structure below the plurality of filters. Alternatively, for demultiplexing embodiments, sets of laser chips are affixed to the guiding structure.

Abstract: An optomechanical assembly for a photonic chip is disclosed. The optomechanical assembly may include a planar lightwave circuit optically coupled to a plurality of vertical coupling gratings on the photonic chip, to couple light between an optical connector abutting the planar lightwave circuit and the photonic chip.

Abstract: A structure for optically aligning an optical fiber to a photonic device and method of fabrication of same. The structure optically aligns an optical fiber to the photonic device using a lens between the two which is moveable by actuator heads. The lens is moveable by respective motive sources associated with the actuator heads.

Abstract: An optical module includes a light emitting element, an optical fiber, a wavelength separating filter that is arranged at a predetermined angle with respect to a longitudinal direction of the optical fiber on a plane including the longitudinal direction of the optical fiber, and a lens for focusing light emitted from the light emitting element on the optical fiber via the wavelength separating filter. The light emitting element is arranged while being offset in a direction perpendicular to a central axis of the lens on a plane where the wavelength separating filter has the predetermined angle with respect to the central axis of the lens.

Abstract: An optical coupling lens includes a first reference portion, a second reference portion and a main portion sandwiched between the first reference portion and the second reference portion. The main portion includes a first surface having at least one first converging lens, a second surface having at least one second converging lenses, and a reflecting surface. The second surface is substantially perpendicular to the first surface forming intersection line. An angle between the reflecting surface and the first surface is about 45 degrees. Each reference portion includes a reference member. The reference member includes a reference point. A connecting line of the reference points of the reference portions is substantially parallel to the intersection line.

Abstract: In one embodiment, micro-electro-mechanical-system (MEMS) mirror structure includes an electrode plate including a first deflection electrode and a second deflection electrode, where the second deflection electrode is opposite the first deflection electrode, where the first deflection electrode is configured to receive a first drive voltage, and where the second deflection electrode is configured to receive a second drive voltage. The MEMS mirror structure also includes a mirror support pillar disposed on the electrode plate, where the mirror support pillar has a bearing surface and a mirror disposed above the bearing surface of the support pillar, where the mirror has a deflection angle, and where the first voltage is nonzero when the deflection angle is zero.

Abstract: An optical module includes: a substrate provided with a through hole for inserting an optical fiber from a second principal surface side of the substrate; an optical device provided on a first principal surface side of the substrate; a first electrode provided in the substrate for connecting an electric fiber from the second principal surface side; a second electrode formed on the first principal surface side of the substrate for connecting to the optical device; and a third electrode provided on a side surface of the substrate and electrically connected to the second electrode.

Abstract: An silicon-on-insulator (SOI)-based photonics platform is formed to including a venting structure for encapsulating the active and passive optical components formed on the SOI-based photonics platform. The venting structure is used to allow for the encapsulated components to “breathe” such that water vapor and gasses will pass through the package and not condensate on any of the encapsulated optical surfaces. The venting structure is configured to also to prevent dust, liquids and other particulate material from entering the package.

Abstract: Provided is a light source device which includes: a LD mounted on a stem; a cap fixed to the stem so as to cover the LD; a light converging lens capable of converging light flux emitted from the LD; an optical fiber connection portion to which an optical fiber is connected, the optical fiber receiving inputting of the light flux converged by the light converging lens; and a holder for holding the optical fiber connection portion, the holder being fixed to the cap. The optical fiber connection portion includes a position adjusting portion which adjusts a position of the optical fiber connection portion with respect to the holder.

Abstract: A cage within a communication module may have a plurality of receptacles. A cover may cover at least a portion of the cage. A thermal conduction system may include a top wrap, a first side wrap, and a second side wrap. The top wrap may comprise a top wrap top portion covering at least a portion of the cover top side and a top wrap back portion covering at least a portion of the cover back side. The first side wrap may comprise a first side wrap back portion covering at least a portion of the top wrap back portion, a first side wrap side portion covering at least a portion of the cover first side, and first side fingers extending through a first slit in the cover into the cage. A heat sink may be attached to the first side wrap back portion.

Abstract: An electric-port SFP photoelectric module includes a base, an outer cover, a PCB and an RJ45 connector. The base is a rectangular parallelepiped with an inner cavity. The PCB and the RJ45 connector are connected in a combined manner. A combined structure of the PCB and the RJ45 connector is arranged in the inner cavity of the base. The upper part of the base is fastened with the outer cover.

Abstract: A photoelectric conversion device uses an optical coupler to divide a light beam emitted from a light emitter into two portions according to a predetermined ratio. A first light beam portion is guided to an optical fiber, and a second light beam portion is guided to a light receiver. The light receiver can detect an intensity of the second light beam portion. In this way, a processor can calculate an intensity of the light beam emitted from the light emitter accordingly.

Abstract: An optical module includes: at least one optical waveguide provided on a surface of a substrate; a plurality of grooves provided in the optical waveguide on the surface of the substrate and having both a surface orthogonal to the surface of the substrate and an inclined surface; multiple pairs of light-emitting and light-receiving elements aligned with the plurality of grooves in the optical waveguide and provided so as to correspond to light of different wavelengths on the optical waveguide; and a plurality of light-selecting filters each provided on an inclined surface of the plurality of grooves in the optical waveguide and reflecting light of the wavelength corresponding to the light-emitting element in the respective pair of light-emitting and light-receiving elements towards the optical waveguide, and selectively reflecting light of the corresponding wavelength from the light propagating through the optical waveguide towards the corresponding pair of light-emitting and light-receiving elements.

Abstract: A housing including a plurality of openings for receiving fiber optic connectors and protecting the polished end face of the connectors from damage while the connectors are stored within a telecommunications connection cabinet. A module with a plurality of optical fiber cables connected to a first optical fiber cable and terminated by a fiber optic connector. Each of the connectors are inserted within openings in a connector holder for storage and protection until the cables need to be connected to a customer equipment cable.

Abstract: The fiber optic assembly can include two fiber optic breadboards hinged to one another along a coinciding hinge axis. Each one of the fiber optic breadboards can have a flat body having two faces and lateral edges, one of which running alongside the hinge axis, and can have a tessellation of tray locations each having a tray attachment. The fiber optic assembly can also include a plurality of fiber optic trays each having a body having a base attachable to at least one of said tray attachments, the body having a size and shape associated to one of a single one of said tray locations and a plurality of adjacent ones of said tray locations on one of said at least one fiber optic breadboards, and having a structure by which an optical fiber having a critical radius of curvature can be confined within at least one optical fiber path.

Abstract: A modular optical fiber distribution housing is provided. The housing includes a first row of splitter modules and a second row of splitter modules both supported from the inner surface of one of the plurality of walls, and each splitter module is receives an input optical fiber and includes a splitting device configured to split a signal carried by the received input optical fiber into a plurality of signals carried by respective output optical fibers. The first row of splitter modules is located between the second row of splitter modules and the inner surface of the wall supporting the first and second rows of splitter modules.

Abstract: Fiber management assemblies, trays and network interface devices for use in telecommunications that incorporate such assemblies and trays are described. Fiber management trays can include integrated slack storage systems and mechanical fiber splice devices mounted into integrated splice holding grooves, where the mechanical fiber splice devices are actuated by a fiber splice actuation mechanism positioned over the mechanical fiber splice device, as are network interface devices incorporating such assemblies and trays.

Abstract: A telecommunications assembly includes a chassis defining an interior region and a tray assembly disposed in the interior region. The tray assembly includes a tray and a cable spool assembly. The cable spool assembly is engaged to a base panel of the tray. The cable spool assembly is adapted to rotate relative to the tray. The cable spool assembly includes a hub, a flange engaged to the hub and an adapter module. The flange defines a termination area. The adapter module is engaged to the termination module of the flange. The adapter module is adapted to slide relative to the flange in a direction that is generally parallel to the flange between an extended position and a retracted position.

Abstract: A device (1) for connecting together tubes (101, 102) for protecting an optical fiber cable (103), the device comprising a tubular body (2) defining a channel (3) having a first housing (4.1) and a second housing (4.2) each arranged to receive one of the tubes and provided with means (5) for sealed retention of said tube, and an annular step (9) extending between the housings to form an abutment against penetration of the tubes into the housings, an annular sealing element (10) being arranged in the first housing beside a flank of the step and being arranged to be taken, under the effect of axial compression exerted by the tube, from a first state in which the sealing element defines a section through which the cable can pass freely to a second state in which the sealing element defines a section less than a section of the cable. A segment, of an optical transmission circuit including such a connection device.

Abstract: The invention relates to a means of cable strain relief (1) comprising a crimping sleeve (3) for the mechanical operative connection of a cable (5) to a crimping neck (2), wherein the crimping sleeve (3) is used in the crimped state for clamping a textile braid (7) of the cable (5) intended for stain relief between the crimping sleeve (3) and the crimping neck (2). At its cable-side end, the crimping sleeve (3) comprises a deformable plastic sleeve (4) that produces a mechanical operative connection in the crimped state between an exterior jacket (6) of the cable (5) and the crimping sleeve (3).

Abstract: A fiber optic distribution cable includes a jacket defining an exterior of the fiber optic distribution cable and a plurality of optical fibers extending through a cavity of the jacket. The jacket has an access location with a single opening formed in the jacket that extends to the cavity. A distribution optical fiber of the plurality of optical fibers extends through and protrudes from the single opening in the jacket at the access location. The length of the distribution optical fiber is at least 5/4 times the length of the single opening.

Abstract: A fan-out subassembly includes furcation modules mounted to a furcation module holder, which is adapted to be connected to a main component. The furcation module holder includes a cable anchoring location. Each of the furcation modules has a furcation tube mounting insert and a plurality of furcation tubes. The furcation tubes are supported by the furcation tube mounting inserts and have free portions that extend outwardly from the furcation tube mounting inserts and from the furcation module holder. The furcation tubes can hold optical fibers of a cable that extends from the subassembly to a cable spool. The subassembly and the free portions of the furcation tubes can be packaged together until installation.

Abstract: A gravitation compensator for mounting optical elements in a projection exposure apparatus and a corresponding projection exposure apparatus are disclosed. The gravitation compensator at least partly compensates for the weight force of a mounted optical element and simultaneously enables a change in the position of the optical element without the compensated weight force being altered in an impermissible manner during the change in position. This applies, in particular, to high weight forces which are to be compensated. Furthermore, the gravitation compensator enables use in different atmospheres and the compensation of corresponding aging effects.

Abstract: A voice coil motor (VCM) includes a fastening portion, a moving portion, a magnet assembly, a coil, an elastic sheet, and glue. The lower plate seals the fastening portion. The lower plate includes a first surface and a second surface opposite to the first surface, the lower plate defines a through hole penetrating the first surface and the second surface, the low plate defines a first glue recess around the through hole and a second glue recess along an edge of the low plate in the first surface. The fastening portion is positioned on the first surface of the lower plate via glue received in the first glue recess.

Abstract: A lens focusing device includes a lens holder for holding a lens therein, a base, and an electrically conductive spring member elastically connected to between the lens holder and the base. The base is provided on a side wall with two terminal recesses, in which two connecting terminals are disposed. The connecting terminals respectively include a first terminal portion forward extended along a light axis to electrically connect to the spring member, a second terminal portion rearward extended along the light axis, and a connecting portion located between the first and the second terminal portion. The spring member is further electrically connected to two ends of a winding wound around the lens holder, so that external electric current can be supplied to the winding via the connecting terminals and the spring member for driving the lens holder to move relative to the base along the light axis.