Abstract: A wire grid polarizer (WGP) can have a conformal-coating to protect the WGP from at least one of the following: corrosion, dust, and damage due to tensile forces in a liquid on the WGP. The conformal-coating can include a silane conformal-coating with chemical formula (1), chemical formula (2), or combinations thereof: A method of applying a conformal-coating over a WGP can include exposing the WGP to Si(R1)d(R2)e(R3)g. In the above WGP and method, X can be a bond to the ribs; each R1 can be a hydrophobic group; each R3, if any, can be any chemical element or group; d can be 1, 2, or 3, e can be 1, 2, or 3, g can be 0, 1, or 2, and d+e+g=4; R2 can be a silane-reactive-group; and each R6 can be an alkyl group, an aryl group, or combinations thereof.

Abstract: A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence ?n of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.

Abstract: A uniform illumination lighting module is disclosed herein. In some embodiments, the uniform illumination lighting module comprises a first optical medium, a lower reflective surface disposed adjacent to a bottom boundary of the first optical medium, a concave reflective surface disposed adjacent to a side boundary of the first optical medium, and a light source, wherein at least a portion of the first optical medium is disposed between the light source and the concave reflective surface. In some embodiments, the uniform illumination lighting module further comprises a second optical medium disposed adjacent to a top boundary of the first optical medium. In preferred embodiments, the concave reflective surface is substantially parabolic and the light source is disposed at a parabolic focus of the concave reflective surface.

Abstract: The present disclosure provides a light source, a backlight module and a display apparatus. The light source includes: a light emitting diode chip; and a fluorescent powder layer arranged to face towards the light emitting diode chip and configured to receive a first light emitted from the light emitting diode chip and to emit a second light with a wavelength different from that of the first light, wherein the light emitting diode chip and the fluorescent powder layer are moveable with respect to each other such that quantity of fluorescent powder in the fluorescent powder layer excited by the light emitted from the light emitting diode chip increases or decreases. In the above solution, the light emitting diode chip and the fluorescent powder layer are movable with respect to each other, so as to adjust color temperature of backlight conveniently.

Abstract: The present invention discloses a light guide plate, a backlight module and a display device, so as to solve the technical problem of color shift generated in prior art display panel due to the change of angle of view. The light guide plate comprises a bottom surface, a light exiting surface opposite to the bottom surface, and a quantum dot layer provided on the light exiting surface and comprising a quantum dot array, wherein the light exiting surface has a non-planar structure. Embodiments of the present invention provide following advantageous effects: the quantum dots on the surface of the light guide plate are configured to have a non-planar structure, such that the light transmitted through the spacing between quantum dots and having the same spectrum as the quantum dots is smoothly changed, thereby reducing the affection of color shift of the display device due to the change of angle of view.

Abstract: A backlight unit includes a light conversion member; a light guide plate including a light exit surface, a rear surface facing the light exiting surface, and connection surfaces including a first surface and a second surface facing each other to connect the light exit surface and the rear surface; a reflective member; and a light source emitting a first color light incident to the first surface and a portion of the first color light reaches the second surface on which the reflective member is disposed to specularly reflect the portion of the first color light. The light conversion member is disposed on the light exit surface, receives the first color light from the light guide plate, and emits a second color light different from the first color light.

Abstract: A backlight unit has a light-guide plate and a light source optically coupled with the light-guide plate, with which light is input from a plane of the light-guide plate and white-light is output from the first principal plane of the light-guide plate. The light source has a plurality of blue light emitting diodes, red phosphor material excited by light from the blue light emitting diodes and emits red light, and a plurality of green semiconductor lasers having emission peaks at green light wavelengths.

Abstract: A backlight 200 is provided with a frame body 9 that is in contact with a side surface of a light guide plate 5, and a non-light emitting region surrounding a light emitting region of a light emitting surface of an LED 60. The side surface of the light guide plate 5 and the LED 60 can be brought close to each other, while preventing a contact therebetween by means of the frame body 9. Furthermore, by means of the frame body 9, light emitted from the LED 60 is prevented from leaking out from between the light emitting surface of the LED 60 and the side surface of the light guide plate 5. Consequently, the ratio at which the light emitted from the LED 60 is inputted to the light guide plate 5 is increased, thereby improving luminance or power saving performance of the backlight 200.

Abstract: An optical system is disclosed, which comprises a glass light pipe having an input surface for receiving light from a light source and an output surface through which light exits the light pipe, and a polymeric light pipe optically coupled at its input surface to the output surface of the glass light pipe to receive at least a portion of the light exiting the glass light pipe, said polymeric light pipe having a textured output surface. A plurality of microlenses is optically coupled to said textured surface of the polymeric light pipe, and a projection lens is optically coupled to the output surface of the polymeric light pipe to receive light therefrom.

Abstract: Optical fibers having a large effective area are disclosed. Three main embodiments of the optical fiber allow for single-mode operation at wavelengths of 850 nm, 980 nm and 1060 nm, respectively and have a large effective area with low bend losses. The large effective area optical fiber is expected to be particularly useful for data center applications due to its ability to efficiently optically couple with photonic integrated devices. Integrated systems and optical communication systems that employ the optical fibers are also disclosed.

Abstract: Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 ?m or less, while providing a mode field diameter of 9.0 ?m or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 ?m or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel.

Abstract: We provide methods and apparatus for preparing crystalline-clad and crystalline core optical fibers with minimal or no breakage by minimizing the influence of thermal stress during a liquid phase epitaxy (LPE) process as well as the fiber with precisely controlled number of modes propagated in the crystalline cladding and crystalline core fiber via precisely controlling the diameter of crystalline fiber core with under-saturated LPE flux. The resulting crystalline cladding and crystalline core optical fibers are also reported.

Abstract: Compact photonics platforms and methods of forming the same are provided. An example of a compact photonics platform includes a layered structure having an active region along a longitudinal axis, a facet having an angle no less than a critical angle formed at least one longitudinal end of the active region, and a waveguide having at least one grating coupler positioned in alignment with the angled facet to couple light out to or in from the waveguide.

Abstract: In order to solve the problem of making optical signals pass at a low loss and low polarization dependence, this optical circuit element is configured from rib-type optical waveguides, each of which is configured from a core region, including a planar slab and protruding ribs, and cladding regions that are provided in contact with the top and the bottom of the core region. A first optical waveguide that is provided in the optical circuit element is provided with a plurality of intersection points where the first optical waveguide intersects optical waveguides other than the first optical waveguide, said intersection points being disposed on one straight line.

Abstract: A polarization splitter/combiner and method of forming the same includes a first waveguide having a direction of propagation in a first direction. The height of the first waveguide is greater than the width of the first waveguide. A second waveguide is in proximity to the first waveguide and has a direction of propagation substantially parallel to the first direction in an interaction region. The second waveguide includes a first portion having a greater than the width of the first portion and a second portion having a width greater than a height of the second portion.

Abstract: The outage probability in an under-addressed optical MIMO system may be reduced by configuring a spatial-mode coupler at a transmitter and/or a spatial-mode separator at a receiver to dynamically change its spatial-mode configuration on a time scale that is shorter than the channel coherence time. Provided that the MIMO system employs an FEC code that has a sufficient error-correcting capacity for correcting the amount of errors corresponding to an average state of the MIMO channel established between the transmitter and receiver, this relatively fast dynamic change tends to reduce the frequency of events during which the number of errors per FEC-encoded block of data exceeds the error-correcting capacity of the FEC code.

Abstract: An optical communications module is provided that has WDM capabilities for increased bandwidth and that is suitable for use with single mode optical fiber or multimode optical fiber. The module can be configured to have both WDM and BiDi functionality to further increase bandwidth and can have a single- or multi-channel configuration. The module has an integrally-formed body having an optical port and portions of an optical coupling system that are integrally formed in the body. The optical port is adapted to mate with an end of an optical fiber cable that holds one or more ends of one or more optical fibers, depending on whether the module is a single-channel or multi-channel module. The optical coupling system couples light between an end or ends of one or more optical fibers and one or more optoelectronic devices in a way that reduces back reflection and mode partition noise.

Abstract: Embodiments herein describe an apparatus for coupling a photonic chip with a plurality of optical fibers. In one embodiment, the apparatus comprises a first plurality of alignment features that correspond to a second plurality of alignment features associated with the photonic chip. Further, the apparatus comprises a plurality of grooves for receiving the plurality of optical fibers. In one embodiment, the apparatus comprises a plurality of waveguides for transmitting or receiving an optical signal. The plurality of waveguides is optically coupled to the photonic chip, as well as the plurality of optical fibers. In one embodiment, the plurality of waveguides is passively aligned with a second plurality of waveguides associated with the photonic chip.

Abstract: The present invention provides a telescope array and related components and methods. In various embodiments, the telescope array may include a plurality of telescopes, each telescope associated with a focal plane package and a telescope control system configured to control the focus and tracking of the telescope, such that each telescope may be independently focused and pointed. The focal plane package may comprise an optical fiber feed configured to provide a an optical signal to an optical fiber; and a mirror array configured to provide two shifted simultaneous signals to an image capture device. The telescope array may further comprise at least one switchable multi-fiber coupler configured to couple the signals of at least some of the plurality of telescopes and an array control system in communication with each of the telescope control systems.

Abstract: A connection module includes a module body and a module circuit board arrangement. The module body defines a first port and an open first end providing access to the first port. The module circuit board arrangement extends across the open first end within a peripheral boundary defined by the module body. The module circuit board arrangement includes at least a first contact set that extends into the first port of the module body; an electronic controller that is electrically connected to the first contact set; and a circuit board connector facing outwardly from the module board arrangement. Example connection modules include optical adapters and electrical jacks.

Abstract: Structures and techniques are described for aligning multicore optical fibers in a multicore optical fiber cable having a plurality of optical fiber cores, at least one end portion and a protective coating. The protective coating is removed from the end portion of the multicore fiber cable to create an exposed end portion of the multicore fiber. The exposed end portion of the multicore fiber is inserted into a guide hole defined longitudinally through a ferrule subassembly. The cores of the fiber are aligned rotationally, in a predetermined orientation, relative to the ferrule. Each fiber is biased within its respective guide hole in a predetermined orientation relative to the ferrule. The multicore fiber is bonded within the ferrule. The fiber is trimmed at the ferrule tip and the ferrule and fiber end faces are polished, so that a selected alignment of the multicore fiber is achieved.

Abstract: A method and system connects multiple cores within one fiber, e.g., a multi-core fiber (MCF), to multiple fibers with single-cores. The single-core fibers can then be terminated by traditional envelopes, such as a single core LC envelope. A connector holds the single-core fibers into a pattern that matches a pattern of all, or a sub group, of the individual cores of the MCF. The single-core fibers may all be terminated to individual connectors to form a fanout or breakout cable. Alternatively, the single-core fibers may extend to another connector wherein the single-core fibers are regrouped into a pattern to mate with the cores of another MCF, hence forming a jumper. One or more of the single core fibers may be terminated along the length of the jumper to form a jumper with one or more tap accesses.

Abstract: An embodiment includes a cable connector that includes a connector housing, a fiber support structure, and a latch structure. The connector housing defines a housing cavity. The fiber support structure is attached to the connector housing and extends therefrom in a first direction. The fiber support structure defines a fiber cavity configured to receive a fiber subassembly. The latch structure is attached to the connector housing at a first end and extends therefrom in the first direction. The latch structure is separated in a second direction from the fiber support structure and includes a ramped surface at a second end. The ramped surface displaces the latch structure in a direction opposite the second direction in response to a force in a direction opposite the first direction and does not include a release structure configured to disengage the latch structure from latch tabs of a communication module.

Abstract: Methods and systems for a multi-fiber push-on/pull-off connector locking clip are disclosed and may include operatively coupling a multi-fiber push-on/push-off (MPO) connector to an MPO adaptor by inserting the MPO connector into the MPO adaptor, where the MPO connector comprises an MPO connector pull-to-release housing. The MPO connector may be secured to the MPO adaptor by placing an MPO locking clip adjacent to the MPO connector pull-to-release housing, thereby preventing the MPO connector pull-to-release housing from being actuated. An optical cable may be coupled to the MPO connector. The adaptor may be coupled to an optical device, which may include an optical transceiver. The MPO locking clip may be plastic or metal. The MPO connector and the MPO connector pull-to-release housing may be plastic.

Abstract: An optical fiber termination tool includes a tool base having a pocket to receive a mechanical splice optical fiber connector; a lever hingedly connected to the tool base, the lever including a wedge; and a slide mounted to the lever, the slide slidable relative to the lever, the slide movable from a first position to a second position to move the wedge from a disengaged position to an engaged position.

Abstract: Provided is a mounting component for an optical fiber that allows a laser device and an optical fiber to be aligned with higher precision while providing protection for the laser device mounted on a substrate.

Abstract: Thermal management of a locker etalon in a transmitter optical subassembly (TOSA). In one example embodiment, a TOSA includes a case, a laser positioned within the case and electro-thermally connected to the case, a locker etalon positioned in the case and thermally connected to the case, and a thermoelectric cooler (TEC) positioned within the case and in thermal contact with both the laser and the locker etalon.

Abstract: An optical module includes a case including an optical filter, a receptacle coupled to the case, an optical receiver, and an optical transmitter. The receptacle includes a recess formed along an outer circumferential surface thereof. The recess may be formed by a first side wall and a second side wall which face each other and a bottom surface coupling the first side wall to the second side wall. Further, at least one of the first side wall and the second side wall may include an insulating material.

Abstract: An optical assembly may include a platform disposed within a housing that has a limited space. The platform may be tilted by a first angle to fit a fiber array into the limited space of the housing. The optical assembly may also include a silicon photonics device mounted on the tilted platform. The silicon photonics device may include a grating coupler. The optical assembly may also include the fiber array directly coupled to the grating coupler on the silicon photonics device at a coupling position that deviates from a vertical coupling position by a second angle.

Abstract: There is provided an optical-electrical hybrid module including a substrate on which a plurality of optical communication modules are arranged, the plurality of optical communication modules transmitting or receiving an optical signal through an optical fiber cable and performing conversion between the optical signal and an electrical signal. A shield case covering the optical communication modules includes a surface inclined in a direction away from a position in which the optical fiber cable is mounted to each optical communication module.

Abstract: The method comprises providing a semiconductor substrate, which has a main surface and an opposite further main surface, arranging a contact pad above the further main surface, forming a through-substrate via from the main surface to the further main surface at a distance from the contact pad and, by the same method step together with the through-substrate via, forming a further through-substrate via above the contact pad, arranging a hollow metal via layer in the through-substrate via and, by the same method step together with the metal via layer, arranging a further metal via layer in the further through-substrate via, the further metal via layer contacting the contact pad, and removing a bottom portion of the metal via layer to form an optical via laterally surrounded by the metal via layer.

Abstract: The present invention is directed to a photonic circuit device for optical gain measurement, including: a substrate with a photonic circuit; an active gain section; at least two light couplers arranged such that at least a part of the active gain section is between the light couplers; and a partial reflector arranged to reflect light propagating along the same direction back to a center of the gain section, and wherein the device does not include any other reflector opposite to the partial reflector with respect to the active gain section and configured to reflect light back to the center of the gain section. The present invention is further directed to related gain measurement methods.

Abstract: Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting adjacent two optical fibers 2 together, the connecting portions 3 being intermittently provided in each of a ribbon longitudinal direction and a ribbon width direction. The connecting portions 3 are each formed in such a manner as to fill resin into a gap S formed between adjacent two optical fibers 2, and both surfaces of the respective connecting portions 3 are each formed into a recess having a concave shape curved toward a center of the gap S to separate from lines 4,5 each connecting contact points of the optical fibers 2 when being placed on a horizontal surface.

Abstract: An adapter panel arrangement including a chassis and a panel of adapters. The adapters defining rearward cable connections and forward cable connections of the panel arrangement. Openings permitting access to the rearward and forward cable connections of the adapters are provided. The chassis further including a removable rear chassis portion to provide access to cable routing areas within the chassis interior.

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: An optical fiber distribution or breakout cable for serving multiple customer premises in a multi-dwelling unit (MDU) building. The cable contains a number of bend insensitive fibers each having a different colored coating for identification. A jacket of a flame-retardant polymer compound is extruded to surround the fibers. The jacket is sufficiently opaque to hide the color coated fibers at least partially from view, and the outer diameter of the jacket is not more than about 3.5 mm. A procedure for installing the cable through a hallway of a MDU building so as to lessen any negative visual impact of the installation on observers nearby is also disclosed.

Abstract: The present invention relates to a stacked optical fiber storage compartment formed to receive optical fibers, facilitate the connection of optical fibers and optical jumper cords, and facilitate the arranging and grouping of optical fibers. The stacked optical fiber storage compartment according to the present invention comprises: a compartment body including a main body portion having a receiving space and an open upper portion, and an opening and closing cover pivotably coupled on the main body portion to open and close the open upper portion of the main body portion; and an optical fiber connecting unit installed on the main body portion to receive and connect the respective optical fibers withdrawn from each of the tubes for optical cables extending into the compartment body.

Abstract: An adjustment dial assembly for a sealed system includes a knob having a flanged head and a body, wherein the body is dimensioned to extend through an opening in a housing wall, wherein the flanged head is dimensioned to interface with the housing wall. The body includes a seal detent disposed below of the flanged head for receiving a seal, a fastener interface disposed below the seal detent configured to interface with a fastener for retaining a movement regulation assembly and the knob to the housing wall, and a drive screw opening disposed within the body and configured to receive a drive screw such that the drive screw can be axially moved relative to the knob when the knob is rotated and the drive screw is rotationally fixed.

Abstract: There is provided a lens actuator, including: a lens barrel in which at least one lens is provided on an optical axis; a magnetic part provided on one surface of the lens barrel; and a printed circuit board in which a coil pattern part generating electromagnetic force is provided, the printed circuit board having one surface facing the magnetic part, wherein magnetic material is provided on the other surface of the printed circuit board.

Abstract: Provided is a lens device, including: a lens barrel, a control unit mounted to the lens barrel; and a cable having one end connected to the control unit. In the lens device, a cable housing groove configured to house a part of the cable therein in such a manner that the part of the cable is wound around the cable housing groove from a radially outer side of the lens barrel is formed along a circumferential direction of the lens barrel so as to be exposed.

Abstract: An actuator driving device includes: a linearizer configured to linearize a first signal, indicative of a displacement of a lens module, to generate a second signal; a position controller configured to generate a position control signal in response to the second signal and a control input signal indicative of a target location of the lens module; and a driver configured to drive an actuator in response to the position control signal.

Abstract: The various embodiments of the present invention disclose an image processing method and system for capturing a refocusable image set. The method comprises of segmenting a field of view into a plurality of grids, determining a sharpness level associated with each of the plurality of grids, identifying one or more regions based on the determined sharpness level of each of the plurality of grids, each region comprising one or more of the plurality of grids and capturing an image associated with each of the identified one or more regions to form the refocusable image set. The method further comprises of detecting a refocusing action on an object, in the field of view, having an associated illumination level and varying the associated illumination level of the object based on the detection.

Abstract: A four-piece optical lens for capturing image and a four-piece optical module for capturing image are provided. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with positive refractive power; and at least one of the image-side surface and object-side surface of each of the four lens elements are aspheric. The optical lens can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An optical image capturing system, sequentially including a first lens element, a second lens element, a third lens element and a fourth lens element from an object side to an image side, is disclosed. The first lens element has negative refractive power. The second through third lens elements have refractive power. The fourth lens element has positive refractive power. At least one of the image-side surface and the object-side surface of each of the four lens elements are aspheric. The optical lens elements can increase aperture value and improve the imagining quality for use in compact cameras.

Abstract: An optical imaging lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The third lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The fourth lens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element has at least one convex critical point in an off-axial region thereof, and the two surfaces thereof are both aspheric. The optical imaging lens system has a total of four lens elements.

Abstract: A five-piece optical lens for capturing image and a five-piece optical module for capturing image, along the optical axis in order from an object side to an image side, include a first lens with positive refractive power having an object-side surface which can be convex; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; and a fifth lens which can have negative refractive power, wherein an image-side surface thereof can be concave, and at least one surface of the fifth lens has an inflection point; both surfaces of each of the five lenses are aspheric. The optical lens can increase aperture value and improve the imaging quality for use in compact cameras.

Abstract: An optical assembly for a point action camera or other compact digital camera having a wide field of view, includes multiple lens elements, including at least one lens element that has an aspheric lens surface. The optical assembly is configured to provide a field of view in excess of 120 degrees. The optical assembly has a modulation transfer function (hereinafter “MTF”) at the Nyquist frequency that is above 0.3 and a MTF at half Nyquist frequency that is above 0.5 across the wide field of view.

Abstract: The optical imaging lens includes, sequentially from an object side to an image side, an aperture stop, first, second, third, fourth, and fifth lens elements. The first lens element is made of plastic. The object-side of the second lens element has a convex portion in a vicinity of its periphery. The third lens element has positive refracting power. The object-side surface of the fourth lens element has a concave portion in the vicinity of the optical axis, and the image-side surface of the fifth lens element has a concave portion in the vicinity of the optical axis. Though controlling the convex or concave shape of the surfaces and/or the refracting power of the lens elements, the optical imaging lens shows better optical characteristics and the total length of the optical imaging lens is shortened.

Abstract: An image capturing optical lens assembly includes six lens elements, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface and a concave image-side surface. The third lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The sixth lens element has an aspheric object-side surface and an aspheric concave image-side surface, and the sixth lens element has at least one inflection point on the image-side surface thereof.

Abstract: The present disclosure relates to field of optical lens, and discloses an optical camera lens, which, from the object side to the image side, successively includes: an aperture, first, second, third, fourth, fifth, sixth lenses; a curvature radius of an object-side surface of the second lens r3, a curvature radius of an image-side surface of the fourth lens r8, a total track length of the optical camera lens TTL, an image height IH, a curvature radius of an object-side surface of the fifth lens r9, a curvature radius of an image-side surface r10, a focal length of the integral optical camera lens f, focal lengths of the second, third, fourth lens f2, f3, f4 satisfy the relational expressions: ?0.7<r3/r8<?0.5; TTL/IH<1.35; 1.24<(r9?r10)/(r9+r10)<1.4; 1.5<|(f2+f4)/f3|<2.4; ?3.5<f2/f<?2.5. The optical camera lens provided by the present disclosure can achieve low TTL, and meanwhile having the advantages of large aperture and low sensitivity.