Abstract: Embodiments of the present disclosure provide a multiplexer, and relate to the field of fiber communications technologies. The multiplexer according to the embodiments of the present disclosure includes a first light beam adjusting element, a second light beam adjusting element, a first light filtering and combining element, a second light filtering and combining element, a polarization changing element, and a light polarizing and combining element. The optical multiplexer according to the embodiments of the present disclosure may not only implement combining at least four light beams into one light beam but also reduce the number of reflection times of light during a light combination process.

Abstract: An optical device is described. This optical device includes optical components having resonance wavelengths that match target values with a predefined accuracy (such as 0.1 nm) and with a predefined time stability (such as permanent or an infinite time stability) without thermal tuning and/or electronic tuning. The stable, accurate resonance wavelengths may be achieved using a wafer-scale, single (sub-second) shot trimming technique that permanently corrects the phase errors induced by material variations and fabrication inaccuracies in the optical components (and, more generally, resonant silicon-photonic optical components). In particular, the trimming technique may use photolithographic exposure of the optical components on the wafer in parallel, with time-modulation for each individual optical component based on active-element control.

Abstract: Fibre coupler for creation of optical fibre-containing interferometers (sensors), with at least two parallel optical fibres placed in an enclosure characterized in that each of the optical fibres consists of at least three alternately placed light-conductive sections with different coatings, at least one (1) of which has a melting point above 200° C., and the two corresponding sections (2) with coating other than with a melting point above 200° C. are coupled using any known method. Interferometer containing above described fibre couplers, where the fibre couplers are interconnected by at least two optical fibre sections (8, 9) with a high temperature-resistant coating.

Abstract: A system for providing optical connections that may include an optical grating structure and an optical waveguide coupled to the optical grating structure. The optical grating structure may be configured to receive an optical wave, through an interposer, from an optical source. The optical grating structure may be configured to transform the optical wave into a predetermined electromagnetic propagation mode.

Abstract: An integrated lens with integrated functional optical surfaces for use in optical communication is disclosed. The integrated lens includes first and second cavities and a fiber adapter. The device also includes integrated first and second lenses. The first cavity houses one or more optical transmitting and/or receiving devices. The second cavity has a first optical surface and an optional second optical surface. The fiber adapter has the second lens. The integrated lens enables a small size, a light weight, high coupling and a high transmission efficiency, and can be produced by injection molding using a single mold. The integrated lens is applicable to optical signal coupling, fiber connections, optical modules, and optical or optoelectronic communication.

Abstract: Loss compensated optical switching includes an optical crossbar switch and a wafer bonded semiconductor amplifier (SOA). The optical crossbar switch has a plurality of input ports and a plurality of output ports and is on a substrate of a first semiconductor material. The wafer bonded SOA includes a layer of second semiconductor material that is wafer bonded to a surface of the substrate such that a portion of the wafer bonded SOA semiconductor material layer overlies a portion of a port of the plurality of input ports. The second semiconductor material of the wafer bonded SOA is different from the first semiconductor material of the substrate.

Abstract: A spring push for a fiber optic connector includes an engagement member having a slot to receive a handle that also engages a distal portion of the engagement number. The spring push, along with the handle, allows for fiber optic connectors to be installed and removed from adapters in high density applications. The spring push can be installed into a connector housing and, along with other components, be a fiber optic connector. The engagement member may also originate from other parts of the fiber optic connector.

Abstract: The disclosure generally relates to sets of optical waveguides such as optical fiber ribbons, and fiber optic connectors useful for connecting multiple optical fibers such as in optical fiber ribbon cables. In particular, the disclosure provides an efficient, compact, and reliable optical fiber connector that incorporates a unitary substrate combining the features of optical fiber alignment and redirection of the optical beam to a connected optical fiber.

Abstract: The present invention is directed to a device for receiving an object in a reproducible manner, comprising:—a substantially rigid housing comprising an opening configured to receive therein the object to be reproducibly received;—first elastic engaging means comprising a first set of elastic flexure elements which are configured, when the object to be reproducibly received is situated in an engaging state received in the opening, to engage on the circumferential form of the object to be reproducibly received present at that position;—second engaging means which are configured, when the object to be reproducibly received is situated in an engaging state received in the opening, to engage on the circumferential form of the object to be reproducibly received present at that position; and—wherein the first elastic engaging means and the second engaging means are arranged some distance from each other in the opening. Furthermore, the invention is related to a method for manufacturing such a receiving device.

Abstract: There are provided a connector housing having a simple structure which is capable of suppressing or preventing sharp bending of an optical waveguide and an optical waveguide assembly including the connector housing. A connector housing (5) has at least one core portion and cladding portions surrounding the core portion. The connector housing (5) is configured to be mounted to a front end portion (32) of an optical waveguide (3) having a band-like shape as a whole. The connector housing (5) is a housing including an inner cavity portion (52) penetrating from a front end (506) to a base end (507), and the front end portion (32) of the optical waveguide (3) is configured to be inserted into the inner cavity portion (52). A distance between walls of the inner cavity portion (52) in the thickness direction of the optical waveguide (3) at the base end opening (521) is gradually increasing toward the base end side.

Abstract: A communication enclosure is described that includes an enclosure body having a first body portion and a second body portion. An adapter mounting mechanism is disposed in the first body portion, and a connector adapter mounted into the mounting mechanism that is configured to accept an optical fiber connector. The enclosure includes at least one integrated tool for terminating field mountable optical fiber connectors wherein the at least one integrated tool is disposed on one of the first body portion and the second body portion. In an exemplary aspect, the at least one integrated tool is a connector polishing platform.

Abstract: An optical integrated circuit comprises optical waveguides formed by sequentially stacking a lower cladding layer, a core layer and a upper cladding layer on a substrate, grooves formed by etching the upper cladding layer, the core layer and all or parts of the lower cladding layer close to a end section of the optical waveguide to intercept light transmitted through the core layer of the optical waveguide or to couple light into the core layer, a plurality of bonding pads formed around the groove, micro-mirrors which is inserted into the grooves and cemented thereinto, and have at least one slanted side surface inclined in a range of 30° to 60° with respect to the bottom surface to reflect a light which exits horizontally from the core layer to the groove and turn the path of the exited light vertically toward the upper side of the groove or conversely to reflect light which emitted vertically from an upper side of the groove and turn the path of the emitted light horizontally to couple into the core layer,

Abstract: The light receptacle has: a light transmitting light receptacle main body (130); support parts (140) disposed on both ends of the light receptacle main body (130); first optical surfaces (132) to which light emitted by light-emitting elements (114) is made incident; second optical surfaces (136) that output light made incident at the plurality of first optical surfaces (132) toward the end surfaces of a plurality of light transmitting bodies (116); and four adhesive holding parts (142) that are through holes or recesses with the entire periphery thereof surrounded by the support parts and that are disposed at the four corners of the light receptacle (120) in a plane view. The light receptacle main body (130) and the support parts (140) have a plane-symmetrical shape, and the four adhesive holding parts (142) are disposed in plane-symmetrical positions.

Abstract: A coupling device for physically and optically coupling an input/output end of an optical fiber for routing optical signals, to and from optical receiver and/or transmitter. The coupling device includes a structured reflective surface that functions as an optical element that directs light to/from the input/output ends of the optical fiber by reflection, and an optical fiber retention groove structure that positively receives the optical fiber in a manner with the end of the optical fiber at a defined distance to and aligned with the structured reflective surface. The open structure of the structured reflective surface and fiber retention structure lends itself to mass production processes such as precision stamping. The coupling device can be attached to an optical transmitter and/or receiver, with the structured reflective surface aligned to the light source in the transmitter or to the detector in the receiver, and adapted in an active optical cable.

Abstract: A hermetic optical fiber alignment assembly includes a ferrule portion having a plurality of grooves receiving the end sections of optical fibers, wherein the grooves define the location and orientation of the end sections with respect to the ferrule portion. The assembly includes an integrated optical element for coupling the input/output of an optical fiber to the opto-electronic devices in the opto-electronic module. The optical element can be in the form of a structured reflective surface. The end of the optical fiber is at a defined distance to and aligned with the structured reflective surface. The structured reflective surfaces and the fiber alignment grooves can be formed by stamping.

Abstract: An optical communications module is provided that has improved heat dissipation, signal integrity and/or EMI shielding solutions. The heat dissipation solution thermally decouples the light source driver circuitry from the light source such that heat generated by the light source driver circuitry does not increase the temperature of the light source to the point that its performance is degraded. The heat dissipation solution may also include convective heat transfer features for further improving heat dissipation. The EMI solution includes features that increase the number of contact points between the outer surface of the module housing and EMI fingers of a cage that receives the module. The signal integrity solution includes features that reduce inductive coupling to improve impedance matching between electrical interconnections, thereby improving signal integrity.

Abstract: A device includes integrated circuit chips mounted on one another. At least one component for protecting elements of a first one of the chips is formed in a second one of the chips. Preferably, the chips are of SOI type, the second chip includes an SOI layer having a first thickness sufficient to support the component for protecting elements. The first chip also includes an SOI layer but having a second thickness smaller than the first thickness that is insufficient to support the component for protecting elements. The SOI layer of the second chip may be an optical waveguide layer.

Abstract: An opto-electric hybrid module is provided. In the opto-electric hybrid module, a core and an electric circuit including electric circuit body portions and mounting pads are provided on a surface of an under-cladding layer of an optical waveguide. An optical element is mounted on the mounting pads with its electrodes in abutment against the mounting pads. The core is covered with the over-cladding layer, and a center portion of the optical element is positioned above a portion of the over-cladding layer covering a top surface of the core. A portion of the electric circuit excluding the mounting pads and a surface portion of the under-cladding layer present between the electric circuit body portions of the electric circuit and present between the electric circuit body portion and the mounting pad are covered with a core material layer formed of the same material as the core.

Abstract: A single hybrid electrical/optical connector simultaneously forms both electrical and optical input/output connections by a single step engagement between elements on a connector and corresponding elements of the opposite gender on a mating connector. The connector can be surface-mounted on a circuit board, and a mating connector can be vertically pluggable onto the connector. The optical elements on the connector and/or the mating connector can be detachable, which can simplify assembly of a system that includes the circuit board. The hybrid electrical/optical connector has applications for optical transceivers. The hybrid electrical/optical connector includes a housing that extends laterally along a housing plane. The housing includes electrical and optical sockets thereon. In some examples, the electrical sockets and the optical sockets are laterally arranged on opposite sides of a division plane perpendicular to the housing plane.

Abstract: A fiber optic cable splice storage assembly includes a termination box including first and second curve shaped bend controls disposed in an upper half of the termination box. The first and second curve shaped bend controls face each other and are detached from one another. An exterior cable port is disposed at a lower side of the termination box and includes an opening that is dimensioned to allow a terminating end of a fiber optic cable to be fed into the termination box. A splice retention cradle frame is disposed between the first and second curve shaped bend controls in the top half of the termination box. A splice retention cradle has splice retention features that are dimensioned to accommodate a splice covering for fiber optic cable. The splice retention cradle frame is dimensioned such that the splice retention cradle may snap-in securely to the splice retention cradle frame.

Abstract: A fiber optic distribution terminal includes a cable spool rotatably disposed within an enclosure; an optical power splitter and a termination region carried by the cable spool; an optical cable deployable from the enclosure by rotating the cable spool by pulling on a connectorized end of the optical cable; and splitter pigtails extending between the optical power splitter and the termination region. One fiber of the optical cable extending between the connectorized end and the splitter input. The other fibers of the optical cable extend to a multi-fiber adapter.

Abstract: The present description relates to an optical fiber interconnection tray. The interconnection tray has a base extending longitudinally from a first end to a second end, with a cable entrance at the first end of the tray. A first interconnection layer is disposed on the base, and a second interconnection layer is positioned over at least a portion of the first interconnection layer, wherein the second interconnection layer is disposed on a first repositionable mezzanine attached to the base at a plurality of locations.

Abstract: A fiber optic telecommunications device includes a frame and a fiber optic module including a rack mount portion, a center portion, and a main housing portion. The rack mount portion is stationarily coupled to the frame, the center portion is slidably coupled to the rack mount portion along a sliding direction, and the main housing portion is slidably coupled to the center portion along the sliding direction. The main housing portion of the fiber optic module includes fiber optic connection locations for connecting cables to be routed through the frame. The center portion of the fiber optic module includes a radius limiter for guiding cables between the main housing portion and the frame, the center portion also including a latch for unlatching the center portion for slidable movement. Slidable movement of the center portion with respect to the rack mount portion moves the main housing portion with respect to the frame along the sliding direction.

Abstract: A protective caddy for the installation of an optical fiber cable in optical fiber ducting which temporarily protects a duplex optical fiber cable assembly for an optical fiber duplex connector during insertion of the assembly into a length of ducting. The duplex optical fiber cable assembly comprises a duplex optical fiber cable and a pair of optical fiber connector sub-assemblies. The protective caddy comprises a pair of receptacles, each for receiving one of the optical fiber connector sub-assemblies. Each receptacle has a recess for protectively receiving the termination end of one of the optical fiber ferrules. In use, both the duplex optical fiber cable and the pair of optical fiber connector sub-assemblies are held to the elongate body so that the termination ends are protected by the recesses during insertion of the protective caddy and duplex optical fiber cable assembly into the length of ducting.

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 and is secured by a demarcation point.

Abstract: The invention relates to an adjustable stand for an optical observation instrument, in particular for a surgical microscope, with a tilt spindle 1 and with a swivel spindle 2 for the optical observation instrument and with a flange 4 for connection to the optical observation instrument or a further member of the adjustable stand, wherein, on at least one of the two spindles 1, 2, a first torque compensation device is arranged, which has a first brake 13 for securing the spindle 1, 2, and which has a first spring 11 which is connected to a first motor 12 for adjusting the spring tension of the first spring 11, and the first motor 12 is connected to a first motor controller, and which has a first torque transmission device 14 which is formed between the first spring 11 and the spindle 1, 2, and which has a first position sensor 16 for determining the position of the spindle 1, 2, and which has first force sensor 15 for determining the spring tension of the first spring 11, wherein the position sensor 16 and the

Abstract: A four-piece optical lens for capturing image and a five-piece optical module for capturing image are disclosed. In order from an object side to an image side, the optical lens along the optical axis includes a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with negative 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 imaging quality for use in compact cameras.

Abstract: The present disclosure discloses an optical image capturing system, sequentially arranged from an object side to an image side, comprises a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with negative refractive power; and an image-side surface and an object-side surface of the fourth lens element are aspheric. The optical image capturing system can increase aperture value and improve the imagining quality for applying to compact cameras.

Abstract: The present disclosure discloses an optical image capturing system, sequentially arranged from an object side to an image side, comprises a first lens with positive refractive power; a second lens with refractive power; a third lens with refractive power; and a fourth lens with refractive power; and an image-side surface and an object-side surface of the fourth lens element are aspheric. The optical image capturing system can increase aperture value and improve the imagining quality for applying to compact cameras.

Abstract: An imaging lens consists essentially of, in order from the object side, a positive first lens group, a negative second lens group, a stop, and a positive third lens group. Focusing is effected by moving only the second lens group along the optical axis direction. Each of the first lens group and the third lens group includes at least three positive lenses and at least two negative lenses. The imaging lens satisfies the condition expression (1) below: 0.53<?f2/f<0.9??(1), where f2 is a focal length of the second lens group, and f is a focal length of the entire system when the imaging lens is focused on an object at infinity.

Abstract: A six-piece optical lens system includes, in order from the object side to the image side: a stop, a first lens element with a positive refractive power has a convex object-side surface; a second lens element with a negative refractive power has a convex object-side surface; a third lens element with a positive refractive power has a concave image-side surface; a fourth lens element with a negative refractive power has a concave image-side surface; a fifth lens element with a positive refractive power has a convex object-side surface; a sixth lens element with a negative refractive power has a concave object-side surface, and at least one of object-side and image-side surfaces of each lens element is aspheric. Thereby, such a system can be applied to a high resolution mobile phone.

Abstract: An image capturing lens assembly includes, 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 and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface. The second lens element has refractive power. The third lens element has refractive power, and an object-side surface and an image-side surface thereof being aspheric. The fourth lens element has negative refractive power, and an object-side surface and an image-side surface thereof are aspheric. The fifth lens element with negative refractive power has a concave object-side surface, and the object-side surface and an image-side surface thereof are aspheric.

Abstract: A 1-2nd lens group includes two aspherical resin lenses, and thereby it is possible to perform effective correction in order to suppress aberration fluctuation to be reduced. At this time, a glass lens is disposed between the two lenses, and thereby it is possible to control an incident light angle to the resin lens and to reduce power of the resin lenses, and it is possible to prevent variations of shapes of the resin lens. Even in a case where the second optical group is configured of one mirror, it is possible for a primary image to have appropriate aberration and to hereby reduce aberration for a good image which is finally projected onto a screen through the second optical group.

Abstract: The optical system of the present invention includes, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction, while the second lens group G2 is moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group G3 includes, in order from the object side: an object-side group G3a; an aperture stop S; and an image-side group G3b, and a specified condition is satisfied.

Abstract: Provided is a zoom lens having, in order from an object, a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, a third lens group (G3) having positive refractive power, and a fourth lens group (G4) having positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group and the second lens group changes, a distance between the second lens group and the third lens group changes, a distance between the third lens group and the fourth lens group changes, and at least the first lens group (G1) moves. The first lens group (G1) is constituted by a set of cemented lenses, the third lens group (G3) is constituted by, in order from the object, a positive lens and a negative lens, and the conditional expression 0.50<TL/ft<1.

Abstract: In a 1-2nd lens group, an aspherical resin lens is disposed on the outermost enlargement side, an enlargement-side fixed lens group (second fixed lens group) as a fixed group is disposed, a moving lens group, which move when focusing is performed in response to the magnification change, is disposed further on the reduction side from the second fixed lens group. Even in a case where the second optical group is configured of one mirror, it is possible for a primary image to have appropriate aberration and to hereby reduce aberration of an image which is finally projected onto a screen through the second optical group.

Abstract: Methods, systems and devices for automatically focusing a microscope on a specimen and collecting a focused image of the specimen are provided. Aspects of the methods include detecting the presence of a substrate in a microscope, determining whether the substrate is in a correct orientation for imaging, focusing the microscope on a specimen that is placed on the substrate, and collecting one or more images of the specimen. Systems and devices for carrying out the subject methods are also provided.

Abstract: A multi-focal selective illumination microscopy (SIM) system for generating multi-focal patterns of a sample is disclosed. The multi-focal SIM system performs a focusing, scaling and summing operation on each multi-focal pattern in a sequence of multi-focal patterns that completely scan the sample to produce a high resolution composite image.

Abstract: Provided is a microscope objective lens that sufficiently corrects on-axis and off-axis chromatic aberrations and that has a long working distance. A microscope objective lens OL includes, in order from an object side, a first lens group G1 with positive refractive power and a second lens group G2 with negative refractive power. The first lens group G1 of the microscope objective lens OL includes a diffractive optical element GD including a diffractive optical surface D, and the diffractive optical element GD is arranged at a position closer to the image than a section where a diameter of a light flux passing through the first lens group G1 is the largest.

Abstract: Aspects of the subject technology provide a fluorescence module that is configured to provide a selectable light source for fluorescence microscopy, e.g., through independent paired selection of a light source (emitter) and a corresponding light filter. In some implementations, light source and/or light filter selection is controlled through the independent actuation of light sources and/or light filters on a supporting turret structure.

Abstract: Evanescently-coupled planar waveguides for enhancing total internal reflection fluorescence microscopy are disclosed. The waveguides include multiple thin layers of one or more materials on a cover slip arranged resonantly enhance the optical field at the surface of the layer stack by evanescently coupling to a leaky guided mode.

Abstract: An objective lens for an endoscope consists of, in order from the object side, a negative front group, an aperture stop and a positive rear group. The front group consists of, in order from the object side, a negative first lens and a cemented lens of a negative second lens and a positive third lens cemented together. The rear group consists of, in order from the object side, a positive lens and a cemented lens of a positive lens and a negative lens cemented together. The objective lens for an endoscope satisfies predetermined conditional expressions.

Abstract: An image-acquisition apparatus includes an objective lens consisting of, in order from an object side, a first group and a second group, an image-acquisition device that converts an optical image of an object formed by the objective lens into an electrical signal, a first holding frame holding the first group of the objective lens inside, and a second holding frame holding the second group of the objective lens and the image-acquisition device inside. The objective lens satisfies conditions (1) and (2): ?2.871<f_front/f<?1.180??(1) ?1.498<f_front/f_rear<?0.607??(2) where f_front is a focal length of the first group, f_rear is a focal length of the second group, and f is a focal length of the entire objective lens.

Abstract: Provided is a technology of projecting bright images at one time in a plurality of directions by means of a projector which is small and light weight. An interface apparatus is provided with: a laser source that radiates laser light; an element that modulates the phase of inputted laser light, and outputs the light; an image unit that captures a subject; and a control unit, which detects the subject captured by means of the image unit, determines, based on the results of the recognition, an image to be formed based on the light outputted from the element, and controls the element such that the determined image is formed.

Abstract: A scanning device includes a base containing one or more rotational bearings disposed along a gimbal axis. A gimbal includes a shaft that fits into the rotational bearings so that the gimbal rotates about the gimbal axis relative to the base. A mirror assembly includes a semiconductor substrate, which has been etched and coated to define a support, which is fixed to the gimbal, at least one mirror, contained within the support, and a connecting member connecting the at least one mirror to the support and defining at least one mirror axis, about which the at least one mirror rotates relative to the support.

Abstract: An optical deflector includes a mirror; a piezoelectric actuator adapted to rock the mirror around an axis of the mirror; and a piezoelectric sensor adapted to sense vibrations of the piezoelectric actuator. A control unit includes: a saw-tooth voltage generating block adapted to generate a saw-tooth voltage; an integral block adapted to calculate an integral voltage of a sum of a sense voltage of the piezoelectric sensor and a DC offset characteristic voltage; a DC offset characteristic voltage calculating block adapted to calculate the DC offset characteristic voltage in accordance with the integral voltage; a subtracter block adapted to generate a deviation between the saw-tooth voltage and the integral voltage; and a controller adapted to generate a drive voltage in accordance with the deviation to apply the drive voltage to the piezoelectric actuator.

Abstract: An image sensor that includes a substrate having front and back surfaces, a plurality of photo detectors formed adjacent the front surface, a plurality of contact pads at the front surface and electrically coupled to the photo detectors, and a plurality of light manipulation components disposed on a portion of the back surface. The photo detectors are configured to generate electrical signals in response to light incident through the light manipulation components and through the portion of the back surface. The portion of the back surface has a non-planar shape.

Abstract: Provided is a structure for a display apparatus. The structure for a display apparatus includes: a chassis having a plate shape and provided with a plurality of through holes; a reflection layer formed on one surface of the chassis: and at least one moisture barrier layer formed on the other surface of the chassis.

Abstract: A monitoring camera device is disclosed. The device includes a housing body in which at least a monitoring camera is built in, a transparent plastic-made semispherical dome-shaped cover portion provided on one surface of the housing body, a wiper mechanism rotatably provided on the housing body and which cleans the dome-shaped cover portion, and a wiper driving portion that reciprocatively rotates and drives the wiper mechanism. The wiper mechanism includes a silicon rubber-made wiper blade having an arc surface along a curved surface of the dome-shaped cover portion, and a wiper arm having both end portions rotatably provided around a central axis of the housing body, the central axis being parallel to a bottom surface of the dome-shaped cover portion, and to which the wiper blade is attached protruding to the dome-shaped cover portion side by a predetermined length.

Abstract: A laser processing device including: a laser oscillator; a processing table; a transmission optical system for transmitting laser light emitted from the laser oscillator to the processing table; a processing head for condensing and radiating the laser light transmitted via the transmission optical system to an object to be processed; a moving mechanism for changing a relative position between the object to be processed and the laser light to be radiated to the object to be processed; and a variable curvature spherical mirror. The transmission optical system includes a reflective beam expander mechanism for collimating and magnifying the laser light from the laser oscillator. The reflective beam expander mechanism includes a spherical mirror and a concave mirror having different curvatures in two orthogonal axes.