Abstract: Aspects of the present disclosure relate to a computer display stray-light suppression system for a head-worn computer comprising an eye cover including a flexible material with a perimeter, wherein the perimeter is formed to substantially encapsulate an eye of a person, and the eye cover including an attachment system adapted to removably and replaceably attach to a perimeter of the head-worn computer to suppress light emitted from a computer display in the head-worn computer.

Abstract: An optical system includes a display including an active display region having a maximum lateral dimension D and configured to emit an image for viewing by an eye of a viewer, the active display region including a display center and a predetermined region including the display center, the predetermined region having a largest lateral dimension d, such that d/D?0.

Abstract: Techniques for facilitating calibration of an IPD for an ER system are disclosed. A current IPD setting for the ER system is determined. An object in a scene is selected. A first distance between the ER system and the object is determined. A hologram is generated, where this hologram includes at least one boundary region that corresponds to at least one boundary region of the object. The hologram is displayed in the scene. The hologram is displayed based on the current IPD setting for the ER system. User input adjusts the current IPD setting such that a new IPD setting is provided to the ER system. The hologram is displayed in the scene based on the new IPD setting. Based on the new IPD setting, the hologram is caused to align with the object, thereby calibrating the IPD setting.

Abstract: The invention relates to a collimator for testing a camera (6), comprising a collimator housing (1), wherein the collimator housing (1) has a longitudinal wall (8, 9) and two end walls (10, 11), the first end wall (10) having a light source (2) and the second end wall (11) having a lens (5), a reticle (4) being disposed between the lens (5) and the light source, with the reticle (4) being disposed obliquely with respect to the lens (5) and/or obliquely with respect to the longitudinal wall (8, 9) in the collimator housing (1).

Abstract: Implementations disclosed describe a collimator assembly having a collimator housing that includes an interface configured to optically couple to a process chamber that has a target surface, and a port to receive an optical fiber to deliver, to an enclosure formed by the collimator housing, a first (second) plurality of spectral components of light belonging to a first (second) range of wavelengths, and an achromatic lens located, at least partially, within the enclosure formed by the collimator housing, the achromatic lens to direct the first (second) plurality of spectral components of light onto the target surface to illuminate a first (second) region on the target surface, wherein the second region is substantially the same as the first region.

Abstract: Disclosed is a lens moving apparatus. The lens moving apparatus includes a moving unit having at least one lens installed therein and moving by electromagnetic interaction between magnets and coils, elastic members configured to support the moving unit, and position sensors configured to sense change of electromagnetic force emitted from the magnets according to movement of the moving unit and to output an output signal based on a result of sensing, and a primary resonant frequency of frequency response characteristics according to gain of a ratio of the output signal of the position sensors to an input signal applied to the coils is 30 Hz to 200 Hz.

Abstract: An optical unit with a shake correction function includes a movable module and a fixed body. The movable module has a lens and is supported by the fixed body to be capable of moving in a direction orthogonal to an optical axis of the lens. The fixed body surrounds the movable module from an outer periphery side. The movable module includes a first substrate and a second substrate, with a thickness direction of either substrate being consistent with the direction along the optical axis. An image sensor is disposed on the first substrate. The second substrate is electrically connected to the first substrate to overlap the first substrate on an image side, and is smaller in shape than the first substrate when viewed along the optical axis of the lens. A flexible printed circuit board is led out from an outer circumferential surface of the second substrate.

Abstract: A display panel includes a plurality of sets of pixel strips extending in a first direction and arranged in a second direction, each set of pixel strips includes a plurality of sub-pixel strips in different colors, spacing between every two adjacent sub-pixels in each sub-pixel strip in the first direction is smaller than or equal to 2 ?m, each set of pixel strips is divided into a plurality of pixel islands arranged in an array in the first direction, each pixel island includes at least four sub-pixels extending in the first direction in each corresponding sub-pixel strip, a width of a view region formed by light emitted by each sub-pixel in each pixel island being propagated to a human eye through a corresponding lens is smaller than or equal to a pupil diameter.

Abstract: An electromagnetic absorption metamaterial having an upper surface in a working environment, comprising a periodic resonant unit array. The metamaterial is provided with a dielectric composite film on the upper surface and the film is obtained by laminating solid dielectric layers in different thickness proportions. Materials of said dielectric composite film are selected from at least two materials of silicon oxide, silicon nitride, aluminum oxide, magnesium fluoride and silicon. By selecting different types of dielectric films and laminating the dielectric films in certain proportions, the metamaterial of the present application can obtain a dielectric film having a refractive index between the maximum and minimum refractive index in selected media, thereby achieving more flexible and controllable modulation of surface lattice resonance.

Abstract: An optical prism that includes an interlock structure that precisely couples to a complementary structure of a refractive lens. For precision, the interlock structure may be formed at the same time and using the same technique as the optical surface of the prism. The interlock structure provides high accuracy when assembling a folded lens system by precisely aligning the object side optical surface of the lens with the image side optical surface of the prism so that the optical axis is centered in the lens. The prism may have refractive power. A portion of the object side surface may be coated with an opaque material to provide an aperture stop at that surface.

Abstract: A retroreflective sheet 9 of the present invention includes; a surface layer 1; a glass bead holding layer 5 containing glass beads 3 that are located randomly as viewed cross-sectionally; and a metal reflective layer 4 on a back surface side of the glass bead holding layer 5. The surface layer 1 is a vinyl chloride resin layer. The retroreflective sheet further includes, between the vinyl chloride resin layer and the glass bead holding layer, a barrier layer 2 for preventing deterioration of the metal reflective layer. The barrier layer 2 is preferably an alkyd-melamine resin layer. Thereby, it is possible to provide a retroreflective sheet that can prevent the degradation of, e.g., the reflective function of the metal reflective layer on the back surface side of the glass bead holding layer and thus maintaining high weather resistance and wide-angle reflectivity, and that can exhibit high surface printability.

Abstract: Provided are a polarizing plate and an optical display device comprising same, the polarizing plate comprising a polarizer and a protective layer formed on at least one surface of the polarizer, wherein: the polarizing plate comprises a first area and a second area formed within an image display area; the first area and the second area have different single transmittances in the same wavelength; and the first area has a single transmittance of 45% to 85%, a maximum absorbance of 1.0 to 5.0 in a wavelength in a range from about 270 nm to about 325 nm, a maximum absorbance of 0.5 to 4.0 in a wavelength which exceeds about 325 nm and is lower than or equal to 420 nm, and a maximum absorbance of 0.5 or less in a wavelength in a range from about 500 nm to about 800 nm.

Abstract: A polarizer includes a buffer member and linear metal patterns. The buffer member includes protrusions. Each protrusion has downwardly-increasing width. The buffer member is formed of polymer. The linear metal patterns, spaced apart from each other, are extended in a first direction. Each linear metal pattern covers a respective protrusion.

Abstract: A device is provided. The device includes a first polarization hologram element configured to operate as a half-wave plate for a first light having a first wavelength, and as a full-wave plate for a second light having a second wavelength. The device also includes a second polarization hologram element stacked with the first polarization hologram, and configured to operate as the half-wave plate for the second light and as the full-wave plate for the first light. The first polarization hologram element is configured to forwardly diffract or transmit the first light depending on a handedness of the first light. The second polarization hologram element is configured to forwardly diffract or transmit the second light depending on a handedness of the second light.

Abstract: The present invention relates to a light exiting member, a method of manufacturing the same, and more particularly, to a backlight unit of a liquid crystal display, a front light unit of a reflective display, applicable to interior lighting, living lighting or advertisement lighting, and a light member capable of implementing a delicate and various specific image by selectively burying or modifying the same. The light exiting member according to an embodiment of the present invention has a plurality of fine pattern portions formed on one surface, the fine pattern portions have a cavity, the cavity is defined by a lower surface located at a predetermined depth from the opening and a plurality of inner surfaces connected to the lower surface, and at least one of the inner surfaces is convex.

Abstract: An optical construction includes an optical film between first and second prismatic films, which each include pluralities of parallel, linear first and second prisms. Each of the first and second prisms have opposing first and second sides extending from first and second ends of a base of the prism and meeting at a peak. The first and second sides make first and second base angles with the base of the prism. The peaks of the prismatic films face away from each other and the optical film. For a collimated, normally incident light, for at least a first wavelength in a first wavelength range, and for each of first and second polarization states: the optical film has an optical transmission of less than about 1%, and the optical construction transmits at least 1% of the incident light at an oblique angle greater than 5 degrees with respect to the optical film.

Abstract: The invention provides a light generating system (1000) configured to provide system light (1001), wherein the light generating system (1000) comprises (i) a first light generating device (110), (ii) a second light generating device (120), and (iii) a waveguide (400), wherein: —the waveguide (400) has a first face (401), a second face (402), and a side face (403) bridging the first face (401) and the second face (402); —the first light generating device (110) is configured to generate first device light (111), wherein in an operational mode the first device light (111) has a color point in the visible; the first light generating device (110) is configured to irradiate the side face (403), wherein in an operational mode at least part of the first device light (111) escapes from the waveguide (400) via the first face (401); and—the second light generating device (120) is configured to generate second device light (121), wherein in an operational mode the second device light (121) has a centroid wavelength of at

Abstract: The present disclosure relates to a function display for selectively displaying several symbols representing one switching function, respectively, and/or at least two switching states, including a light guide stack which forms a display surface facing towards an observer; wherein the light guide stack is formed from at least planar light guides arranged in an overlaid manner in a stacking direction, which are arranged so as to be spaced apart by a transparent or translucent layer; at least one light source per light guide wherein, further, at least one microstructured symbol area in or on the light guide which is configured, if the light source is activated, to be visible to the observer; a circuit board on which the several light sources are arranged and fixed; a panel fixed to the light guide stack to which the circuit board is fixed while resting against a mounting surface.

Abstract: A system includes a housing including a front panel, a rear panel, an upper panel, and a lower panel. The system includes a first circuit board or substrate, at least one data processor coupled to the first circuit board or substrate and configured to process data, and at least one optical module coupled to the first circuit board or substrate. Each optical module is configured to perform at least one of (i) convert input optical signals to electrical signals that are provided to the at least one data processor, or (ii) convert electrical signals received from the at least one data processor to output optical signals. The system includes at least one inlet fan mounted near the front panel and configured to increase an air flow across a surface of at least one of (i) the at least one data processor, (ii) a heat dissipating device thermally coupled to the at least one data processor, (iii) the at least one optical module, or (iv) a heat dissipating device thermally coupled to the at least one optical module.

Abstract: The present disclosure provides an aerosol delivery device. The aerosol delivery device comprises one or more rechargeable batteries, charging circuitry including an electrical connector configured to interconnect the one or more rechargeable batteries with a power supply, and a sensor configured to detect an action of using the aerosol delivery device by a user and output a signal. The aerosol delivery device also comprises a microprocessor coupled to the charging circuitry and the sensor, the microprocessor, in response to receiving the signal from the sensor, is configured to control the aerosol delivery device to allow vaping or puffing by a user while the aerosol delivery device is connected to a charger.

Abstract: A terminated hollow-core optical fiber includes a capillary, a hollow-core optical fiber including a structured cladding, and an endcap. A first end of the hollow-core optical fiber terminates inside the capillary a non-zero distance away from a first end face of the capillary. The hollow-core optical fiber is adhered to the capillary at a second end face of the capillary where the hollow-core optical fiber extends out of the capillary. The endcap is fused to the first end face of the capillary. The endcap has a larger diameter than the first end of the hollow-core optical fiber. This termination scheme does not require fusing the hollow-core fiber itself to the endcap or any other part. Therefore, this termination scheme is applicable to hollow-core fibers with a structured cladding that cannot tolerate the temperatures associated with fusing the hollow-core fiber to another part.

Abstract: A graphene optical device according to an embodiment of the present disclosure includes: an upper semiconductor layer; a lower semiconductor layer; and a graphene capacitor disposed between the upper semiconductor layer and the lower semiconductor layer, wherein the graphene capacitor includes a first graphene, a second graphene, and a first insulation layer disposed between the first graphene and the second graphene, wherein the first graphene and the second graphene partially overlap each other when viewed from the upper semiconductor layer toward the lower semiconductor layer.

Abstract: An optical module includes: a substrate and a waveguide element having a mount face opposed to the substrate, the waveguide element having an interference waveguide portion having an optical interference function. Further, the mount face includes a projection region to which the interference waveguide portion is projected on the mount face and a non-projection region, and the waveguide element is joined to the substrate with a joint material in the non-projection region.

Abstract: An integrated optical device includes a substrate, a waveguide structure and a grating structure. The substrate has a waveguide region and a grating region adjacent to each other. The waveguide structure is disposed on the substrate in the waveguide region. The grating structure is disposed on the substrate in the grating region. In some embodiments, the grating structure includes grating bars and grating intervals arranged alternately, and widths of the grating bars of the grating structure are varied.

Abstract: Various embodiments of the present disclosure are directed towards an integrated chip including an optical device disposed on a substrate. A dielectric structure overlies the substrate. The dielectric structure comprises one or more sidewalls defining a light channel over a region of the optical device. A protective structure is above the optical device and disposed on opposing sides of the light channel.

Abstract: Certain splice arrangements include first and second laminate structures bonded around a splice location at which two or more optical fibers are spliced (e.g., fusion spliced) together. The first and second laminate structures each include a flexible polymeric sheet and a heat activated adhesive layer carried by the flexible polymeric sheet. Other splice arrangements include a protective barrier disposed about an optical splice. The protective barrier includes first and second protective layers bonded around the optical splice. Each protective layer include a film carrying an adhesive. The protective barrier may be sufficiently flexible to not restrict flexing the optical fibers at the splice location. Example splice arrangements have thicknesses of less than or equal to 1000 microns, or 900 microns, or 800 microns, or 700 microns, or 600 microns or 500 microns.

Abstract: An optical device includes a first multi-mode waveguide, a first optical coupler coupled to the first multi-mode waveguide, the first coupler being tapered and curved, and a first single-mode waveguide having a first end coupled to the first optical coupler. The optical device may be used in an optical delay device. A method of propagating light in a first multi-mode waveguide toward a first optical coupler, propagating the light in the first optical coupler toward a first single-mode waveguide, the first optical coupler being tapered and curved, and propagating the light along the first single-mode waveguide is also disclosed.

Abstract: Disclosed are apparatuses for optical coupling and a system for communication. In one embodiment, an apparatus for optical coupling including a substrate and a grating coupler is disclosed. The grating coupler is disposed on the substrate and includes a plurality of coupling gratings arranged along a first direction, wherein effective refractive indices of the plurality of coupling gratings gradually decrease along the first direction.

Abstract: An apparatus includes a ribbon, an optical waveguide, and an IC. The ribbon includes a first end. The optical waveguide is disposed within the ribbon and terminates at the first end. The IC includes a curved surface. The first end of the ribbon bends to mate with the curved surface such that the optical waveguide is optically coupled to a corresponding waveguide in the IC.

Abstract: A screen includes a transparent base body with a front face and a rear face, and an image sensor. The base body includes a coupling-in region and a coupling-out region at a distance therefrom in a first direction. The coupling-in region includes a diffractive structure which deflects only part of the radiation incident on the front face and originating from an object to be detected, such that the deflected part is propagated as coupled-in radiation in the base body by reflection, until it reaches the coupling-out region and is incident on said coupling-out region, and the coupling-out region deflects at least part of said incident coupled-in radiation, such that the deflected part exits the base body via the front face or the rear face and is incident on the image sensor.

Abstract: There is provided an optical waveguide constituted by a core made of a semiconductor and formed on a substrate. A grating coupler is provided at one end of the optical waveguide. Further, a reflecting portion formed on the optical waveguide by being optically coupled to the optical waveguide is provided at the other end of the optical waveguide. The optical waveguide constituted by the core includes a light intensity modulation unit that modulates an intensity of guided light in the optical waveguide. The light intensity modulation unit is constituted by a variable optical attenuator.

Abstract: An object of the present invention is to provide, in a local-light coupling technique for improving efficiency of work, an optical fiber local-light coupling apparatus configured to hardly affect communication between an OLT and an ONU while causing light to leak from a coated optical fiber in such an amount that makes it possible to confirm a communication state.

Abstract: The present disclosure relates generally to a fiber optic connector system. The fiber optic connector system includes two fiber optic connectors that each have a ferrule assembly mated together within a fiber optic adapter. The fiber optic connector system includes end faces of the ferrule assemblies that remain in a contacted state when an axial load is applied to an optical fiber of one of the two fiber optic connectors. As such, an optical connection remains between the two fiber optic connectors even when one connector is retracted from the other connector.

Abstract: A front housing of the optical-electrical composite connector is axially provided with a through groove passing through the front housing on the front housing, and an inner wall of the through groove is provided with a first groove. A rear housing includes a main body portion and a clamping portion connected to one end of the main body portion. An outer surface of the clamping portion is axially provided with a second groove, the clamping portion is located in the through groove, and the first groove is butted with the second groove to form an accommodation space. One end that is of the through groove and that is away from the main body portion is an optical port. The font housing is provided with an opening connecting to the accommodation space and the outside. The conductive terminal is accommodated in the opening, and the conductive terminal forms an electrical port.

Abstract: Disclosed is an optical device including a first lens and a second lens. The first lens of the optical device is joined to an end surface of an optical waveguide of an optical element to emit light emitted from the optical element. The second lens is optically coupled with the first lens to convert the light emitted from the first lens into collimated light.

Abstract: An optical module includes a shell, a circuit board, at least one of a light-transmitting chip or a light-receiving chip, a lens assembly, an optical fiber ferrule assembly and a fixing plate. The circuit board is disposed in the shell. The light-transmitting chip and/or the light-receiving chip is disposed on the circuit board. The lens assembly is disposed on the circuit board, covers the light-transmitting chip and/or the light-receiving chip, and is configured to change a propagation direction of an optical signal incident into the lens assembly. The optical fiber ferrule assembly is connected to the lens assembly, and is configured to transmit an optical signal incident into the optical fiber ferrule assembly. The fixing plate is configured to fix the optical fiber ferrule assembly to the lens assembly.

Abstract: A semiconductor device includes a plurality of intermediate waveguides. The plurality of intermediate waveguides are vertically disposed on top of one another, and vertically adjacent ones of the plurality of intermediate waveguides are laterally offset from each other. When viewed from the top, each of the plurality of intermediate waveguides essentially consists of a first portion and a second portion, the first portion has a first varying width that increases from a first end of the corresponding intermediate waveguide to a middle of the corresponding intermediate waveguide, and the second portion has a second varying width that decreases from the middle of the corresponding intermediate waveguide to a second end of the corresponding intermediate waveguide.

Abstract: Fiber optic network systems are implemented, at least in part, using very small form factor (VSFF) interconnect components such as VSFF duplex connector; VSFF mechanical transfer ferrule (MT) connector; VSFF duplex uniboot connector; VSFF MT uniboot connector; VSFF duplex adapter; VSFF MT adapter; VSFF duplex pluggable transceiver; VSFF MT pluggable transceiver; VSFF patch cable assembly; VSFF trunk cable; and/or VSFF breakout cable. The VSFF fiber optic network systems can define fiber breakout cabling that connects large trunk cables to many peripheral network locations. The network systems can define branches and sub-branches from a trunk cable. The network systems can define cross-connect sub-networks between sets of transceivers or adapters. The network systems can define a trunk-to-transceiver cabling assembly for connecting a trunk cable to at least 32 transceiver ports.

Abstract: In various embodiments, optical fibers have arrangements of core, annular core, and cladding regions enabling variation of beam shape and/or beam parameter product and may be utilized for the processing (e.g., welding, cutting, drilling, etc.) of various workpieces.

Abstract: The present disclosure discloses a telecommunications enclosure (1) and a method for coupling a cable to a cable port of the telecommunications enclosure. The latter comprises a casing (10), a base (20) adapted to be removably coupled to the casing (10), and a plurality of sealing assemblies (40) adapted to be removably coupled to the base (20). Each sealing assembly (40) comprises an elastically deformable sealing module (43) interposed between a first member (46) and a second member (58). The first member (46) and second member (58) comprise each a main portion (47, 59) and a movable portion (51, 63), wherein the movable portion (51, 63) is movable between an open position, wherein a cable is allowed to access to the elastically deformable sealing module (43), and a closed position; the elastically deformable sealing module (43) has an access (44) to allow the cable to enter the respective cable port (42) when the movable portions (51, 63) are in the open position.

Abstract: A mounting system for an optical network includes a backboard member having a plurality of mounting regions, at least one networking component having a data input, at least one data cable communicatively coupled with the data input, and at least one fiber trough member operably coupled with the backboard member. The at least one networking component is operably coupled with the backboard member via one of the plurality of mounting regions. The at least one fiber trough member includes an elongated base surface having first and second ends and a body extending therebetween, a first elongated wall surface having a curved side profile, and a second elongated wall surface including at least one routing opening. The second elongated wall surface is adapted to overlap the first wall surface. The elongated base surface and first and second elongated wall surfaces define a cavity to retain the at least one data cable.

Abstract: The present disclosure relates to a fiber optic cable that includes a plurality of internal optical fibers and a fiber optic cable portion. The fiber optic cable portion includes an outer jacket and an inner conduit, the inner conduit containing the plurality of optical fibers disposed therein. The fiber optic cable further includes a flexible conduit portion, wherein the flexible conduit portion has a proximal end and a distal end. The proximal end is secured to the fiber optic cable portion and the distal end has a terminating device. The terminating device at least partially encases the flexible conduit portion, and the plurality of optical fibers passes through the flexible conduit portion and the terminating device.

Abstract: Positioning assemblies for use with a robot include a gimbal assembly having a gimbal's rotational center is positioned directly above a center of gravity of a payload. One or more linear counter masses and/or one or more rotating masses (flywheels) can be provided, and each can include an actuator or brake to control forces acting between the counter masses and/or flywheels and the payload and stabilize the payload during and after movement of the payload with the robot.

Abstract: An electronic device includes a carrier substrate having a front face. An electronic chip is mounted on the front face of the carrier substrate and includes an optical component. An encapsulation cover is mounted on top of the front face of the carrier substrate and bounds a chamber within which the chip is situated. A front opening extends through the cover and is situated in front of the optical component. An optical element, designed to allow light to pass, is mounted within the chamber at a position which covers the front opening of the encapsulation cover. The optical element includes a central region designed to deviate the light and having an optical axis aligned with the front opening and the optical component. A positioning pattern is provided on the optical element to assist with mounting the optical element to the cover and mounting the cover to the carrier substrate.

Abstract: High-power light absorbers (HPLAs) can exhibit low back-scattered light, mitigate stray light, and withstand high optical power. The absorbers can be used with or without baffling as beam dumps for high-power lasers. An HPLA may include a substrate made of high thermally conductive material with an anti-reflection (AR) coating formed on the substrate. A thin layer of highly absorbing material may be located between the AR coating and substrate. The substrate can be cooled with a fluid, such as water or air.

Abstract: The present embodiment relates to a camera module comprising: a bobbin, which has a through-hole formed therein; a lens module, which is accommodated in the through-hole and is coupled to the bobbin; a protrusion formed to protrude from the outer peripheral surface of the lens module; and a recess formed to be recessed from the inner peripheral surface of the bobbin so as to accommodate at least a part of the protrusion, wherein the recess comprises a first guide portion, which extends downwards from the upper end of the bobbin, and a second guide portion, which extends so as to slope from the first guide portion.

Abstract: Provided is a lens unit capable of maintaining suitable image formation characteristics even with changes in temperature. The fourth lens outer peripheral face of a fourth lens is not in contact with the inner peripheral face of a second accommodation part. A fifth lens is made of glass, is press fitted and fixed to a resin-made lens holder to form an integrated fifth lens body, and is housed in a lens-barrel. A stepped part formed to engage with a stepped part in the fourth lens is provided in the lens holder outside the fifth lens on the object side of the fifth lens body. A fifth lens body outer peripheral face that is an outermost peripheral face of the fifth lens body comes in contact with the inner peripheral face of the second accommodation part.

Abstract: An imaging lens system includes a plastic lens element. The plastic lens element includes an optical effective portion and an outer ring portion. The optical axis passes through the optical effective portion. The outer ring portion surrounds the optical effective portion and includes an annular groove structure, a conical surface, a flat abutting portion and a full-circle connecting portion. The annular groove structure is tapered off. Each of the conical surface and the flat abutting portion is located closer to the optical effective portion than the annular groove structure. The flat abutting portion is in physical contact with an optical element. The full-circle connecting portion is connected to the annular groove structure and located farther away from the optical effective portion than the annular groove structure. The annular groove structure has an annular bottom end surface extending in a direction substantially perpendicular to the optical axis.

Abstract: Digital cameras, optical lens modules for such digital cameras and methods for assembling lens elements in such lens modules. In various embodiments, the digital cameras comprise an optical lens module including N?3 lens elements Li, each lens element comprising a respective front surface S2i-1 and a respective rear surface S2i. In various embodiments the first lens element toward the object side, L1 and its respective front surfaces S1 have optical and/or mechanical properties, such as a clear aperture, a clear height and a mechanical height that are larger than respective properties of following lens elements and surfaces. This is done to achieve a camera with large aperture stop, given a lens and/or camera height.

Abstract: An interchangeable lens that is removably attachable to a camera body includes: a first clock receiver that receives a first clock signal from the camera body; a second clock transmitter that transmits a second clock signal to the camera body; a lens that is driven by a driving force from a first drive member; a receiver that receives an instruction signal from the camera body in synchronization with the first clock signal; and a first transmitter that repeatedly transmits positional information on the lens to the camera body in synchronization with the second clock signal.