Abstract: The present application relates to a liquid crystal composition, a polarizing element and a use of the polarizing element. Since the polarizing element may be prepared by a simple coating process, the guest host type liquid crystal composition of the present application allows not only for reducing the manufacturing cost and lightweight thinning of the polarizing element, but also for manufacturing the polarizing element showing an excellent heat resistant stability without changes of absorption spectrum to transmission spectrum even in a severe condition such as high temperature environment. Such a polarizing element can be applied to various display devices such as liquid crystal display devices, EL display devices, field emission display devices, display devices using electronic papers, projection display devices or piezoelectric ceramic display devices.

Abstract: A wire grid polarizer and method of making a wire grid polarizer can protect delicate wires of the wire grid polarizer from damage. The wire grid polarizer can include a protective-layer located on an array of wires. The array of wires can further be protected by a chemical coating on an inside surface of the air-filled channels, closed ends of the air-filled channels, damaged wires of the array of wires in a line parallel to an edge of the wire grid polarizer, or combinations thereof. The method can include (i) providing the wire grid polarizer, (ii) applying the protective-layer, by physical vapor deposition or chemical vapor deposition but excluding atomic layer deposition, onto the array of wires, (iii) cutting the wire grid polarizer wafer into multiple wire grid polarizer parts, then (iv) protecting the array of wires.

Abstract: A light-emitting device includes: a balloon, a light source disposed outside the balloon; and an optical fiber that connects the balloon and the light source and propagates light emitted by the light source. At least one of the balloon and the optical fiber becomes luminous by the light emitted by the light source.

Abstract: A light guide plate for a large-size backlight module, and the light guide plate includes a light guide body and a glossy lens array. The light guide body includes a light incident surface for receiving light. The glossy lens array is formed on said light incident surface by thermal reforming a lateral terminal of said light guide body. Said glossy lens array includes a plurality of curvy ridges and the radius of curvature of each of said curvy ridges ranges from 20 ?m to 50 ?m, and the angle between two tilted edges of each of said curvy ridges ranges from 50 to 60 degrees, whereby said glossy lens array enables said large-size backlight module to be produced in a roll-to-roll production line without burr issue.

Abstract: An illumination apparatus, which is to be connected to a light source apparatus that generates laser light and which is to be attached to an optical cable that guides the laser light, is provided. The illumination apparatus includes a light-emitting module which is to be attached to a tip portion of the optical cable. The light-emitting module receives the laser light emitted from the optical cable, converts the laser light into light having a different wavelength of a predetermined color, and emits the light. A heat dissipating lens case includes a lens and dissipates heat generated by the light-emitting module. The lens controls distribution of the light emitted by the light-emitting module. The heat dissipating lens case includes an attachment structure which allows the heat dissipating lens case to be removably attached to the light-emitting module.

Abstract: A backlight module, including a light guide plate and a flexible circuit board, wherein an edge of the light guide plate is provided with plural light source mounting holes disposed along a thickness direction of the light guide plate; a light source is mounted in every light source mounting hole in such a manner that a light emitting surface of the light source is attached onto a hole wall of the light source mounting hole; plural groups of anode-cathode conductive parts are disposed on the flexible circuit board in one-to-one correspondence with the plural light source mounting holes, each being connected to an anode and a cathode of the light source in a corresponding light source mounting hole. The backlight module improves the brightness and uniformity of the light entering the light guide plate. A liquid display device including the above-mentioned backlight module is further provided.

Abstract: A display in a portable information handling system may have a narrow or no border. A light guide for display light enhancement used to illuminate the display may be formed with concave indentations at a first face that receives light from a light source, such as a string of light emitting diodes. The concave indentations may improve the homogeneity of light transmitted by the light guide. The light guide may further have a light diffusive surface treatment at the first face.

Abstract: A display device includes: a display substrate through which light propagates at an inner area thereof, the display substrate including a lateral surface through which the light is incident; a display unit which is on the display substrate and generates and displays an image with the light propagated through the display substrate; and a light source which is disposed at the lateral surface of the display substrate and generates and irradiates the light to the display substrate.

Abstract: A light concentrator (11) is disclosed which comprises at least one lighting element (1) configured to emit light (32), an optical filter (3) arranged so as to receive light having a wavelength within a selected wavelength emission band via a light in-coupling surface (4) and configured to selectively transmit light incident on the light in-coupling surface through the optical filter and output the light via a light out-coupling surface (5), on a condition that the light incident on the light in-coupling surface has a wavelength within a selected wavelength transmission band, a light-redirection element (6) having a light-redirection surface (7) arranged substantially parallel in relation to the light out-coupling surface (5) of the optical filter so as to receive at least some of the light out-coupled via the light out-coupling surface (5), and configured to redirect light impinging on the light-redirection surface, and a light-guiding region (8), which is delimited at least by the light-redirection surface

Abstract: A backlight device 13 includes LEDs 22, a light guide plate 24, and a light reflecting portion 34. The light guide plate 24 is a plate member and includes a light entrance surface 24a, an opposite edge surface 24d, and a light exit surface 24b. The light entrance surface 24a is an edge surface of the plate member and opposite the LEDs 22 and light emitted by the LEDs 22 enters the light guide plate 24 through the light entrance surface. The opposite edge surface 24d is another edge surface of the plate member that is on an opposite side from the light entrance surface 24a. The light exit surface 24b is a plate surface of the plate member and the light entering through the light entrance surface 24a exits the light guide plate 24 through the light exit surface. The light reflecting portion 34 is disposed on at least the opposite edge surface 24d and reflecting light travelling within the light guide plate 24 toward the opposite edge surface 24d.

Abstract: According the embodiments of the present disclosure, the light guide plate includes a light guide plate body having an upper surface as a light-exiting surface. The light guide plate is provided at a side portion at least one notch, and a light-reflection layer is arranged at a surface of each notch. A wedge-shaped structure is arranged on a lower surface of the light guide plate body and adjacent to a bottom of each notch. The wedge-shaped structure has a first surface attached onto the lower surface of the light guide plate body, a second surface serving as a light-entering surface, and a third surface intersecting the first surface and the second surface and forming an acute angle relative to the first surface. A light-reflection layer is arranged on the third surface. A light source is arranged at a position on the lower surface of the light guide plate body adjacent to the second surface of the wedge-shaped structure.

Abstract: A light device includes a transparent substrate having a first surface and a second opposite surface, an array of light-modifying elements formed on the substrate, and a light source to project light along a thickness direction of the substrate. The light-modifying elements having surfaces inclined at an angle with respect to at least one of the first surface and the second surface, and configured to diffuse light by reflecting and/or refracting incident light.

Abstract: A light source device includes a light source configured to emit illumination light and a flat plate shaped transparent lightguide element. The lightguide element includes: an incident surface facing the light source; a reflecting surface formed in one of side surfaces of the lightguide element to reflect the illumination light incident into the lightguide element from the incident surface; and an exit surface formed in a side surface of the lightguide element on an opposite side to the reflecting surface, the illumination light reflected by the reflecting surface exiting from the exit surface. The reflecting surface is formed into a curved surface, the curved surface collimating the illumination light reflected by the reflecting surface in a surface including a lengthwise direction of the reflecting surface, and the reflecting surface is formed into a concave mirror in a surface including a short direction of the reflecting surface.

Abstract: A planar lighting device according to an embodiment includes: a light guide that has flexibility and receives light from a side surface and emits the light from a light-emitting surface; a light source disposed close to the side surface and emits light that enters the side surface; a first frame having a curved shape and having an aperture; a second frame having a curved surface for sandwiching the light guide between the first frame and the curved surface such that the light-emitting surface faces the aperture; and an optical sheet disposed close to the light-emitting surface with at least a part of an edge portion of the optical sheet being disposed in a space defined by the first frame and the light guide, the part being separated from the first frame.

Abstract: An optical receptacle includes: a fiber stub including an optical fiber, a ferrule, and an elastic member; and a holder holding the fiber stub, the optical fiber including a cladding and a core for conducting light, the ferrule having a through-hole fixing the optical fiber, the elastic member fixing the optical fiber in the through-hole, the fiber stub having one end surface on the ferrule side, and another on an opposite side, the optical fiber including first and third portions on the opposite end surface sides and a second portion therebetween, a core diameter of the first portion being smaller than the third portion, and a core diameter of the second portion increasing from the first portion side toward the third portion side.

Abstract: Aspects of the present application provide an optical device comprising a suspended optical component over a cavity, such as an undercut region in a substrate. The cavity is filled with a filler material. In some embodiments, the optical device and a method may be provided to fill the cavity with the filler material using a reservoir and a channel in the substrate connecting the reservoir to the cavity to be filled.

Abstract: A photonic radiator used for a photonic phased array antenna includes a waveguide including a waveguide clad and a waveguide core that uses semiconductor materials, and a grating that radiates an output light wave to a space by using scattering of an input light wave incident in a direction of the waveguide.

Abstract: The present invention discloses a photonic crystal all-optical anti-interference self-locking trigger switch which includes a photonic crystal structure unit, an optical switch, an absorbing load and an internal or external reference light source, wherein said photonic crystal structure unit includes two signal-input ends, a signal-output end; a first input end of said photonic crystal structure unit is connected to a logic signal X; the input end of the optical switch is connected with the reference light source, the first intermediate signal-output end of the optical switch is connected with the second input end of the photonic crystal structure unit, and the second intermediate signal-output end of the optical switch is connected with the wave absorbing load. The present invention has the advantages of high contrast of high and low logic output, high computing speed, strong anti-interference capability, and ease of integration with other optical logic elements.

Abstract: Provided is a phase error compensating apparatus. The phase error compensating apparatus may include a waveguide array disposed between a first free propagation region and a second free propagation region and configured to allow a light signal passed through the first free propagation region to move toward the second free propagation region, in which a length of each of the waveguides included in the waveguide array may be adjusted to compensate for a phase error of light signals passed through the waveguides.

Abstract: A right-angle bending waveguide includes a circular-hole-type square-lattice photonic crystal (PhC) and a single compensation scattering rod having a low refractive index. The right-angle bending waveguide is a PhC formed from first dielectric rods having a low refractive index arranged in a background dielectric having a low refractive index according to a square lattice. In the PhC, one row and one column of the first dielectric rods having a high refractive index are removed to form the right-angle bending waveguide. A second dielectric rod having a high refractive index is arranged at a corner of the right-angle bending waveguide. The second dielectric rod is the compensation scattering rod or an air hole. The first dielectric rods are circular rods having the low refractive index or air holes.

Abstract: The present invention discloses a PIOS with a high extinction ratio based on slab PhCs which comprises an upper slab PhC and a lower slab PhC connected as a whole; the upper slab PhC is a first square-lattice slab PhC, the unit cell of the first square-lattice slab PhC includes a high-refractive-index rotating square pillar, a single first flat dielectric pillar and a background dielectric; the first flat dielectric pillar includes a high-refractive-index dielectric pipe and a low-refractive-index dielectric, or a high-refractive-index flat films, or a low-refractive-index dielectric; the lower slab PhC is a second square-lattice slab PhC with a complete bandgap, the unit cell of said second square-lattice slab PhC includes a high-refractive-index rotating square pillar, a single second flat dielectric pillar and a background dielectric is a low-refractive-index dielectric; and an normalized frequency of the optical switch is 0.41 to 0.4167.

Abstract: The present invention discloses a PhC all-optical self-AND-transformation logic gate, which comprises an optical-switch unit, a PhC-structure unit, a NOT-logic gate and a D-type flip-flop unit; said clock-signal CP is connected with an input port of the two-branch waveguide, said two output ports of the two-branch waveguide are respectively connected with the input port of said NOT-logic gate and a first clock-signal-input port of said PhC-structure unit; the output port of said NOT-logic gate is connected with the second clock-signal-input port of said D-type flip-flop unit; the signal-output port of the PhC structure is connected with the D-signal-input port of said D-type flip-flop unit; a logic-signal X is connected with the logic-signal-input port of said PhC-structure unit. The structure of the present invention is compact in structure and ease of integration with other optical-logic elements.

Abstract: The present invention discloses a photonic crystal (PhC) all-optical AND-transformation logic gate, which comprises a PhC-structure unit, an optical-switch unit, a wave-absorbing load, a NOT-logic gate and a D-type flip-flop; two intermediate-signal output ports of the optical-switch unit are respectively connected with the intermediate-signal input port and the wave-absorbing load of the PhC-structure unit; a clock-signal CP input port is connected with three-branch waveguide, and three output ports are respectively connected with first clock-signal CP input port of the optical-switch unit, second clock-signal CP input port of the PhC-structure unit and the NOT-logic-gate input port; the NOT-logic-gate output port is connected with third clock-signal CP input port of the D-type flip-flop; the signal-output port of the PhC-structure unit is connected with the D-signal input port of the D-type flip-flop.

Abstract: A tunable optical filter integrates the functions of wavelength tuning and power isolation of back reflection. The optical signal enters a Faraday rotator twice, and isolation is provided by two birefringent crystals, having their optical axes oriented at 45 degrees with respect to each other. The two birefringent crystals are on the same side of the Faraday rotator. The integration of an optical tunable filter and an isolator function into a single packaged component helps to reduce the size and complexity of optical amplifier systems, such as EDFAs and PDFAs, operating in the 1550 nm and 1310 nm transmission bands, respectively.

Abstract: A large-scale tunable-coupling ring array includes an input waveguide coupled to multiple ring resonators, each of which has a distinct resonant wavelength. The collective effect of these multiple ring resonators is to impart a distinct time delay to a distinct wavelength component (or frequency component) in an input signal, thereby carrying out quantum scrambling of the input signal. The scrambled signal is received by a receiver also using a large-scale tunable-coupling ring array. This receiver-end ring resonator array recovers the input signal by imparting a compensatory time delay to each wavelength component. Each ring resonator can be coupled to the input waveguide via a corresponding Mach Zehnder interferometer (MZI). The MZI includes a phase shifter on at least one of its arms to increase the tunability of the ring array.

Abstract: External modulators, variable optical attenuators, optical gates, etc. employing Mach-Zehnder interferometers (MZIs) are a common structure within photonic integrated circuits and solutions for addressing the ever increasing demands for larger bandwidth and higher capacity in telecommunication and datacom networks. In most applications, but particularly data centers with potentially tens of thousands of optical links where direct board level applications would be preferred with CMOS compatibility, low power consumption is required. Equally, reducing the footprint of optical devices whilst increasing the functional integration on a line card for example does little for power consumption unless the device capacitance and drive voltage can be reduced as well. Accordingly, it would be beneficial to provide MZIs that require reduced phase shifts to reduce power consumption as the square of reduced applied voltage.

Abstract: In various embodiments, the beam parameter product and/or numerical aperture of a laser beam is adjusted utilizing a step-clad optical fiber having a central core, a first cladding, an annular core, and a second cladding.

Abstract: An optical element includes a distributed Bragg reflector, wherein the distributed Bragg reflector includes a first-order diffraction grating of a first-order period disposed in a central region, and second-order diffraction gratings of a second-order period having a coupling coefficient smaller than a coupling coefficient of the first-order diffraction grating and disposed in both end regions between which the central region is located.

Abstract: Optical inputs to photonic switches may incorporate a polarization controller in order to change the polarization of the input signal to a pre-determined polarization for operation with the silicon photonics. A last stage of components of the polarization controller may overlap with a first input switching stage. A polarization controller that overlaps with the first stage of the switch input may provide lower insertion loss and power consumption for the photonic switch.

Abstract: A communications connection system includes an adapter module defining at least first and second ports and at least one media reading interface mounted at one of the ports. The first adapter module is configured to receive a fiber optic connector at each port. Some type of connectors may be formed as duplex connector arrangements. Some types of adapters may include ports without media reading interfaces. Some types of media reading interfaces include contact members having three contact sections.

Abstract: A fiber optic connector assembly incorporates features that improve structural rigidity and the integrity of transmitted signals. These features also facilitate a technique for reversing polarity of the connector assembly with little or no risk of twisting the optical fibers and without requiring the housing assembly to be disassembled. The connector is marked or embossed with transmit and receive connector labels that facilitate visual identification of the polarity of the connector. One side of the duplex connector can be marked with “A” and “B” labels corresponding to the receive and transmit connectors, respectively. The opposite side of the duplex connector can be marked with two “A” labels corresponding to the receive and transmit connectors, respectively. Thus, a user can readily identify whether the connector is configured for “A-B” polarity or “A-A” polarity.

Abstract: A fiber optic connector assembly incorporates features that improve structural rigidity and the integrity of transmitted signals. These features also allow the connector assembly to be accessed easily in high density connectivity environments. These features also facilitate a technique for reversing polarity of the connector assembly with little or no risk of twisting the optical fibers and without requiring the housing assembly to be disassembled. The connector assembly is constructed using a small number of parts, thereby maintaining low maintenance costs while yielding a sturdy structure. A puller can be added to the connector assembly to improve access in congested connectivity applications without increasing the size profile. Chamfered front faces afford a degree of alignment tolerance when plugging the connector assembly into an adapter. Features of the connector assembly can be implemented in both a duplexed housing version as well as a paired simplex clipped version.

Abstract: Embodiments of the present disclosure provide techniques for a fiber optic connector assembly configured for polarity reversal in accordance with some embodiments. An assembly may include a housing to receive a fiber optic cable, at least one back post connected with the housing, a ferrule including at least an optical fiber of the fiber optic cable, insertable into the back post, and a connector component comprising a front housing. The front housing may hold at least a portion of the ferrule and detachably couple with the back post. The back post may include a retaining element to provide rotatable coupling of the front housing relative to the ferrule, the back post and the housing. Other embodiments may be described and/or claimed.

Abstract: The present disclosure relates to a fiber optic connector for use with a fiber optic adapter. The fiber optic connector includes a connector housing having an end defining a plug portion. A ferrule assembly is mounted at least partially within the connector housing. The ferrule assembly includes a ferrule located at the plug portion of the connector housing. A sealing member is mounted about an exterior of the connector housing for providing a seal between the connector housing and the adapter. The fiber optic connector further includes first and second separate retaining mechanism for retaining the fiber optic connector within the fiber optic adapter.

Abstract: An optical cross-connect component mutually connecting an end of a first optical fiber group and an end of a second optical fiber group is disclosed. The optical cross-connect component includes a plurality of first connectors housing therein the end of the first optical fiber group, and a plurality of second connectors housing therein the end of the second optical fiber group. The m×n optical fibers in the first optical fiber group are housed in any of the plurality of first connectors, and the m×n optical fibers in the second optical fiber group are housed in any of the plurality of second connectors. The end of the first optical fiber group and the end of the second optical fiber group are connected so as to be butted to each other.

Abstract: An optical cross-connect component is disclosed. The optical cross-connect component includes an optical fiber group having m×n optical fibers, one ends and the other ends of the m×n optical fibers being arranged in a matrix of m rows×n columns, a plurality of first connectors housing the one ends of the optical fiber group, and a plurality of second connectors housing the other ends of the optical fiber group. The m×n optical fibers are housed in any of the plurality of first connectors, and one first connector collectively houses therein n optical fibers arranged in at least any one row of the m rows. The m×n optical fibers are housed in any of the plurality of second connectors, and one second connector collectively houses therein m optical fibers arranged in at least any one column of the n columns.

Abstract: The invention relates to an optical transmitter assembly (OTA) for vertical coupling of light into a chip, and to a method for manufacturing the OTA. The OTA includes a laser diode, a microlens and a turning mirror mounted at a top face of a supporting substrate within a sealed enclosure, and an optical component, such as an optical isolator, a polarizer, or a microlens disposed in a substrate cavity that opens to the back face of the substrate. The optical component may be placed into the cavity after the enclosure is sealed.

Abstract: An optical axis adjustment method for optical interconnection, includes: providing, on a substrate, an optical transmitter including light sources and a mark for acquiring a position of each of the light sources; providing, on the substrate, an optical waveguide including cores each allowing light emitted from the respective light sources to propagate through the core; determining a first position based on the mark as a position of each of the light sources; and forming, at a second position in the optical waveguide corresponding to the first position, first mirrors configured to reflect the light emitted from the respective light sources and make the light propagate through the respective cores.

Abstract: An optical waveguide device includes a wiring substrate, a first cladding layer formed on the wiring substrate, a base protective layer formed on the first cladding layer and formed into a certain pattern, a core layer formed on the first cladding layer and the base protective layer, a recess portion having an inclined surface and formed from the core layer to the base protective layer, an optical path conversion mirror formed on the inclined surface, and a second cladding layer formed on the first cladding layer and the core layer. A refractive index of the base protective layer is smaller than a refractive index of the core layer. A width of the base protective layer is equal to or greater than a width of the core layer.

Abstract: An optical fiber cable includes a core including a plurality of units which are assembled and each of which comprises a plurality of optical fibers which are assembled, a pair of tension members disposed so as to face each other with the core interposed therebetween, and a sheath covering the core and the pair of tension members collectively. The units are twisted so as to form a plurality of layers. The plurality of layers includes a first layer having first-layer units formed in an SZ-twisted shape and a second layer having second-layer units formed in an SZ-twisted shape. A twisting direction of the first-layer units is opposite to a twisting direction of the second-layer units in at least a portion in a cable length direction.

Abstract: A hybrid chassis for fiber management includes a fixed tray adapted to mount to one of a rack and a frame; a sliding chassis assembly housed in the fixed tray; fiber connectors on a front faceplate of the sliding chassis assembly; internal cross connections in the sliding chassis assembly between the fiber connectors; and a sliding mechanism between the sliding chassis assembly and the fixed tray providing constrained sliding of the sliding chassis assembly between at least two positions including an operating, recessed position and a maintenance, fiber access position. In the operating, recessed position, the sliding chassis assembly can be recessed by about 3.3? in the fixed tray, wherein, in the maintenance, fiber access position, the sliding chassis assembly can be recessed by about 1.3? for fiber access, and wherein the constrained sliding can be about 2?.

Abstract: A multi-positionable tray assembly (20) for mounting within a chassis (10) of a telecommunications panel (100) is disclosed. The multi-positionable tray assembly (20) may include support arm (24) that pivotally supports a tray (22) and that allows the tray assembly (20) to be installed and removed from the chassis (10). The tray (22) and the support arm (24) cooperatively define a cable routing pathway (208) that extends through a pivot axis (A1) defined by the tray and the support arm. To minimize the required depth of the tray (10) and optimize cable routing, the tray (20) can include a cable management structure (102) with a patch panel (104) having a plurality of adapters (108) arranged along a transverse axis (A2), wherein the transverse axis is non-parallel or oblique to a front plane (A4) of the tray.

Abstract: A telecommunications chassis comprises a cable sealing portion defining at least one cable opening configured to sealably receive a cable and a module mounting portion extending from the cable sealing portion, which further comprises a housing defining an open front closable by a door to define an interior, a rear wall, a right wall, and a left wall. A plurality of module mounting locations is provided in a vertically stacked arrangement, each configured to receive a telecommunications module through the open front. An exterior of the housing includes a first column of radius limiters defining curved profiles for guiding cables from the front toward the rear with bend control. A second column of radius limiters in the form of spools is spaced apart and generally parallel to the first column of radius limiters and a third column of radius limiters, at least some of which are in the form of spools, is also spaced apart and generally parallel to the first and second columns of radius limiters.

Abstract: A fiber optic cable guide may have an elongated base member that is curved along at least a portion of its length to define and limit the amount of curvature to be applied to a portion of a fiber optic cable while also defining the angular offset applied to the cable. The guide may be releasably attachable to a cable, and may include a cable retention member at each end of the base member that retains the cable with the guide.

Abstract: A traceable cable assembly includes a traceable cable having at least one data transmission element, a jacket at least partially surrounding the data transmission element, and first and second tracing optical fibers extending along at least a portion of a length of the traceable cable. The traceable cable assembly also includes a connector provided at each end of the traceable cable. The first and second tracing optical fibers each have a light launch end and a light emission end. The light launch ends of the first and second tracing optical fibers each include a bend. The bend allows for launching of light into the light launch ends without disengaging the first or second connectors from corresponding connector receptacles.

Abstract: A lens portion, a rib portion formed outside the lens portion, and a protruding portion protruding outward from a part of the rib portion are included, and the thickness of the rib portion is 1.4 times or more the thickness of an aperture end of a lens surface of the lens portion.

Abstract: A lens module includes a first lens, a second lens, and a distance maintenance member disposed between the first lens and the second lens, the distance maintenance member having a hole for adjusting an amount of light. An inner circumferential surface of the hole includes a plurality of inclined surfaces that are respectively inclined at predetermined angles with respect to an optical axis.

Abstract: A camera module is provided, including a lens driving mechanism, a lens unit, a housing, and an elastic member. The lens unit is disposed on the lens driving mechanism. The housing surrounds the lens driving mechanism. The elastic member is connected to the lens driving mechanism and comprises a metal base, a first insulation layer, and a first metal wire. The first insulation layer is disposed between the metal base and the first metal wire, and the first metal wire is electrically connected to the lens driving mechanism.

Abstract: A focusing control device includes a filter processing unit 11a which performs first filter processing selected from among a plurality of kinds of filter processing on each of a first signal group output from a plurality of phase difference detection pixels 52A and a second signal group output from a plurality of phase difference detection pixels 52B, a correlation calculation unit 11b which performs correlation calculation of the first signal group after the first filter processing and the second signal group after the first filter processing, and a lens position control unit 11c which controls a position of a focus lens based on the result of the correlation calculation. The filter processing unit 11a selects the first filter processing from among the plurality of kinds of filter processing based on subject condition information.

Abstract: An optical lens including a first lens group and a second lens group is provided. The first lens group is arranged between a magnified side and a minified side. The first lens group includes a lens closest to the magnified side. A refractive power of the lens is negative, and at least one surface of the lens is an aspherical surface. The second lens group is arranged between the first lens group and the minified side. A distance between the first lens group and the second lens group is smaller than 0.7 millimeter. The optical lens is complied with conditions of 0.53<EFL/IH<0.7, FOV?150 degrees, and F?2.8, where EFL is an effective focal length, IH is an image height on an imaging plane at the minified side, FOV is a maximum field of view, and F is f-number.