Abstract: Systems and methods for a global positioning system using Global Navigation Satellite System (GNSS) signals and Stokes Parameters in accordance with embodiments of the invention are illustrated. One embodiment includes a GNSS. The GNSS includes at least four satellites and a receiver. Each satellite includes at least one pair of antennas, and a transmitter configured to transmit GNSS positioning signals to a receiver. The receiver includes a memory containing a positioning application, and a processor comprising a set of one or more processors, the positioning application configures the processors to determine a position of the receiver by performing the steps of collecting horizontal and vertical linear components of transmitted GNSS positioning signals, computing Stokes parameters of collected GNSS signals, obtaining tuning parameters based on computed Stokes parameters, synthesizing new polarization signal using tuning parameters, and processing new polarization signal to obtain a position of the location.

Abstract: Sets of digital samples associated with received wireless signals are received, each of the sets of digital samples corresponding to a particular RF path. The sets of digital samples are provided to a plurality of pipelines, each of the plurality of pipelines including a plurality of stages, each of the plurality of stages including one or more digital logic circuits. Sets of interconnect data are generated by the plurality of pipelines based on the sets of digital samples, the sets of interconnect data including at least one accumulating value. The sets of interconnect data are passed between adjacent pipelines of the plurality of pipelines along a direction. A result is generated by a last pipeline of the plurality of pipelines based on the at least one accumulating value.

Abstract: A method for determining at least one system state by way of a Kalman filter assembly, wherein at least one measured value measured by at least one sensor of the system is supplied to the Kalman filter assembly is disclosed.

Abstract: The present disclosure provides an electronic control device capable of suppressing variations in the position of a work machine calculated based on satellite signals received by a GNSS terminal due to changes in the GNSS communication environment, and eliminating the position error after improvement of the communication environment in a shorter time than before. The electronic control device includes: a positioning quality determination section 211 that determines whether the positioning quality is good or poor based on GNSS information; a traveling state determination section 212 that determines the traveling state, including a stop state, based on the velocity of the work machine; and a smoothing section 213 that performs smoothing processing to the GNSS information.

Abstract: A method can include receiving satellite observations, determining GNSS corrections, monitoring the GNSS corrections, transmitting the GNSS corrections and monitor result, and determining a GNSS receiver positioning solution.

Abstract: Disclosed is a seamless complex positioning method using heterogeneous positioning techniques, the method including: performing, by a positioning control apparatus, satellite signal-based positioning in an area where a satellite signal is received; determining, by the apparatus, whether a first position of a mobile terminal determined using satellite signal-based positioning is close to a shaded area; determining, by the apparatus, a non-satellite signal-based positioning scheme supported in the shaded area when the first position is close to the shaded area; determining, by the apparatus, a second position of the mobile terminal while performing satellite signal-based positioning and positioning according to the non-satellite signal-based positioning scheme simultaneously when the first position is close to the shaded area; and stopping, by the apparatus, satellite signal-based positioning and performing only positioning according to the non-satellite signal-based positioning scheme when the second position

Abstract: Provided are an underwater environment detection device and method, a fishing rod, and a storage medium.

Abstract: A radiation measurement device may be provided. The radiation measurement device may comprise a scattering component and a first detector. The scattering component may be located between a radiation source of an imaging device and the first detector, and configured to scatter first radiation rays emitted by the radiation source into scattering rays. The first detector may be configured to collect first measurement data by detecting at least a portion of the scattering rays, the first measurement data reflecting an operation status of the radiation source.

Abstract: Described is a scintigraphic measurement device with extended area, including a measurement structure having a matrix of scintillation crystals and an optoelectronic network for converting photons into electrical signals; a collimator with collimation channels; an electronic processing unit applied to the measurement structure processing the electrical signals generated by the measurement structure.

Abstract: A positron emission tomography (PET) scanner may include a plurality of gamma radiation detector modules arranged to form a detector ring. Each detector module may include an array of elongated scintillation crystals. With respect to the detector ring, each elongated scintillation crystal includes a proximal end-face, two axially oriented lateral faces, two transaxially oriented lateral faces, and a distal end-face radially oriented into the detector ring to receive a gamma photon. An array of photosensors is positioned along a first of the axially oriented lateral faces of each elongated scintillation crystal to detect scintillation photons. A reflective material is positioned on the proximal end-face, the distal end-face, the transaxially oriented lateral faces, and a second of the axially oriented lateral faces of each elongated scintillation crystal to internally reflect scintillation photons.

Abstract: A radiation detector unit includes at least one radiation sensor having pixel detectors that generate event detection signals in response to photon interaction events, an application specific integrated circuit (ASIC) including circuit components on a substrate, the at least one radiation sensor mounted over the application specific integrated circuit via a plurality of bonding material portions such that event detection signals generated in each of the pixel detectors of the at least one radiation sensor are received at a respective pixel region of the ASIC, and the circuit components of the ASIC convert the event detection signals received at each of the pixel regions of the ASIC to digital detection signals, and a carrier board underlying the ASIC, where the ASIC includes a plurality of through-substrate vias (TSVs) electrically coupling the ASIC to the carrier board, each of the TSVs underlying an active pixel detector of the at least one radiation sensor.

Abstract: The present inventive concept relates to: a radiation detector including a bendable radiation detecting panel and a radiation inspection apparatus including same. The radiation detector includes: a radiation detecting panel which is flexible, extending in a first direction, and detecting radiation incident to a first face; and a bending support unit which is plate-shaped, provided on a second face of the radiation detecting panel opposite to the first face to support the radiation detecting panel, and having a flexibility. The flexibility of the bending support unit is less than a flexibility of the radiation detecting panel.

Abstract: A system and a method for the remote monitoring of an irradiated salt mass within a decay enclosure is provided. The system and the method determine a mass ratio of a first radioisotope relative to a second radioisotope, the second radioisotope having a significantly shorter half-life than the first radioisotope. In addition, the second radioisotope includes a shorter half-life than an effective half-life of the decay enclosure, and the first radioisotope includes a longer half-life than the effective half-life of the decay enclosure. The mass ratio quickly decreases outside of a target range after material diversion, while remaining below the target range for several years. As a consequence, the isotopic mass ratio presents a rapid and enduring indicator of inventory change, which is of extreme importance in detecting a diversion of the irradiated salt mass, which remains a potential proliferation target.

Abstract: An AI-driven cable mapping system that employs distributed fiber optic sensing (DFOS) fiber sensing and machine learning that provides autonomous determination of fiber optic cable location and mapping of same. Designed Al algorithms operating within our inventive systems and methods provide an easy solution for cable mapping in a GIS system; automatically maps using landmarks and manhole locations; and employs a supervised learning algorithm. A vehicle-assist operation is employed wherein a vehicle carries a Global Positioning System (GPS) device and drives along a roadway thereby following the fiber optic cable route; data paring that provides further significant locational information wherein time synchronizes between the DFOS system and vehicle GPS device from which we automatically pair the data of fiber length from traffic trajectories and GPS coordinates by time series.

Abstract: This disclosure relates to the technical field of exploration geophysics, in particular to a method, a device, and a computer device for decoupling anisotropic elastic wave. The method includes: determining a set of Thomsen parameters included in an anisotropic model based on a received to-be-decomposed wave field decomposition request; transforming the set of Thomsen parameters to obtain a set of initial elastic parameters; performing S-wave and P-wave velocities separation processing for the set of initial elastic parameters to obtain a set of target P-wave elastic parameters and a set of target S-wave elastic parameters; and substituting those into the anisotropic model to process the to-be-decomposed wave field and obtain a target P-wave matrix and a target S-wave matrix. The process of decomposing S-wave and P-wave fields is simplified and the calculation cost is reduced according to the embodiments of this disclosure.

Abstract: There is provided a method and an apparatus of fiber optic distributed acoustic sensing (DAS) which use a simple, reliable and robust signal processing for amplitude-based DAS measurements. 1) The lack of linearity of the amplitude-based DAS measurements (due to its unpredictable variation of the transfer function along the fiber) can be improved by normalizing the amplitude vs distance using an amplitude-normalization trace obtained from either a) coherent laser OTDR measurements with laser frequency dithering or b) computing a normalization trace from the coherent OTDR/DAS traces and the un-coherent OTDR/DAS traces. 2) Instrument offset (e.g., due to low vertical sampling resolution) may further be corrected using un-coherent OTDR/DAS traces to extract an instrument system offset.

Abstract: A fiber sensing system according to the present disclosure includes a submarine cable, and a plurality of relaying apparatuses being connected in series to one another via the submarine cable. The relaying apparatus includes a DAS interrogator being connected to a relaying apparatus at a subsequent stage via a sensing optical fiber in the submarine cable, and a terminator being connected to a relaying apparatus at a preceding stage via the sensing optical fiber. The DAS interrogator outputs probe light to the sensing optical fiber. The terminator terminates probe light being output from the DAS interrogator in the relaying apparatus at the preceding stage to the sensing optical fiber. The DAS interrogator receives backscattered light of probe light from the sensing optical fiber, and acquires the DAS data from the received backscattered light.

Abstract: An umbilical-based marine acquisition system includes an umbilical cable configured to be attached with a proximal end to a vessel and to provide compressed air to a seismic source, a sensor loaded section having plural seismic sensors distributed along a length of the sensor loaded section, the sensor loaded section being configured to be attached with a distal end to another sensor loaded section or to the seismic source, and an umbilical-sensor section connection configured to connect a distal end of the umbilical cable to a proximal end of the sensor loaded section. The umbilical-sensor section connection and the sensor loaded section are configured to transmit seismic data acquired by the plural seismic sensors to the vessel.

Abstract: A marine seismic survey comprises towing a first source and a first streamer spread having a length L behind a first vessel. Sensors in the streamer spread record signals from the first source over a range of offset distances X to X+L. A second source is towed behind a second vessel that does not tow a streamer spread. Sensors in the streamer spread record signals from the second source over a range of offset distances A+L to A+2L. Sensors in the streamer spread do not record signals over a range of offset distances X+L to A+L from any active seismic sources used in the marine seismic survey.

Abstract: A method and system for real-time calculating a microseismic focal mechanism based on deep learning is provided, which belongs to the technical field of microseismic monitoring. The method includes: creating a training dataset, the training data including simulated DAS microseismic strain data and a focal mechanism corresponding to the simulated DAS microseismic strain data; training a focal mechanism calculation model by using the training dataset, with the simulated DAS microseismic strain data as an input and the focal mechanism corresponding to the simulated DAS microseismic strain data as a target output, so as to obtain a trained focal mechanism calculation model; collecting DAS microseismic strain data by a surface and downhole DAS acquisition system; performing preprocess operations such as removing abnormally large values on the DAS microseismic strain data; inputting the preprocessed DAS microseismic strain data into a trained focal mechanism calculation model to obtain a focal mechanism.

Abstract: A geophysical surveying method and assembly applying transient pulses of electric current to an airborne time-domain electromagnetic transmitter to generate a primary controlled electromagnetic field; measuring, using an airborne receiver, a secondary controlled electromagnetic field to generate controlled field data; measuring, using the airborne receiver, a magnetic component of a natural electromagnetic field at an above-ground position to generate first natural field data; measuring, using a ground receiver at a ground station, telluric electrical currents induced by the natural electromagnetic field and/or a magnetic component of the natural electromagnetic field at a ground position to generate second natural field data; merging the first natural field data and the second natural field data into combined natural field data; extracting, from the combined natural field data, off-time natural field data recorded between the pulses; and generating geophysical survey data based on the controlled field data a

Abstract: Systems and techniques are provided for integrating laboratory generated nuclear magnetic resonance (NMR) data and NMR logging data. An example method can include obtaining NMR logging data describing one or more downhole NMR measurements captured during a drilling operation in a borehole; modifying the NMR logging data to be compatible with a temperature correction algorithm, yielding modified NMR logging data, the temperature correction algorithm having been determined based on laboratory generated NMR data; and applying the temperature correction algorithm to the modified NMR logging data, yielding temperature corrected NMR logging data.

Abstract: A method of determining at least one x-ray scanning system geometric property includes the steps of positioning a calibration device inside a scanning chamber of the scanning device, the chamber being intersected by at least one fan beam of x-rays during a scanning operation, measuring a distance between the calibration device and at least one inner wall of the chamber, scanning the calibration device to produce an image of the calibration device, identifying pixels representing the a geometric feature of the calibration device in the image, determining a position and orientation of the pixels representing the geometric feature in the image and, determining a scanning system property based on the position and orientation of the pixels representing the geometric feature in the image. The position and orientation of the feature in the scanning chamber and the x-ray scanning system property may be determined simultaneously.

Abstract: An apparatus for generating vertically separated atom clouds. The apparatus comprises an optical system comprising an arrangement of lenses and optics. The optical system is configured to trap and cool atoms to form a cold atom cloud; select the hyperfine level of the atoms; trap atoms of the cold atom cloud in a standing wave optical lattice; and vertically split the cold atom cloud into a high cold atom cloud and a low cold atom cloud. The splitting comprises splitting the cold atom cloud into two clouds by launching atoms of the cold atom cloud in opposite directions to form a high cold atom cloud and a low cold atom cloud, and catching the low cold atom cloud up to reach the same velocity as the high cold atom cloud.

Abstract: Geophysical anomalies in an area or region can be detected, characterized, or otherwise mapped using a combination of environmental and geophysical sensor data acquired using a vehicle, which may be a remotely operated or autonomously controlled unmanned vehicle. Anomalies are detected by processing the environmental sensor data and geophysical sensor data using artificial intelligence algorithms, programs, or models. As an example, the artificial intelligence algorithms, programs, or models can include machine learning algorithms, programs, or models. The environmental sensor data are processed to generate control parameters for controlling the acquisition and/or processing of the geophysical sensor data optimized for environmental conditions in the area.

Abstract: The present application discloses a gravimeter zero-drift correction method, apparatus and electronic device, which belongs to the field of gravimeter correction. The gravimeter zero-drift correction method includes: acquiring standard comparison data and actual monitoring data of the gravimeter; determining a plurality of difference values between the actual monitoring data and the standard comparison data; determining the presence or absence of an inflection point among a plurality of difference values; correcting a plurality of difference values in the absence of inflection point among a plurality of difference values; correcting difference values on both sides of a demarcation point respectively by taking an infection point as a demarcation point, in the presence of an inflection point among a plurality of difference values.

Abstract: A blast modeling system may generate a site model based on blast input data. The blast input data may include blasthole data, bench information, and geology input data. The site model may comprise a plurality of distinct elements representing rock masses. The blast modeling system may simulate a blast by determine initial pressures in each blasthole caused by a detonation of an explosive. The blast modeling system may determine a heave of the blast based in part on the initial pressures, and display a simulation that is based in part on the heave.

Abstract: An eye view system comprises a contact lens that has been built in with a layer of hydrogel glass on the outer surface of the lens with a slight air gap between creating a pocket of air between the wearer's eye and the surrounding water, which allows light to refract properly and help us to see clearly under water.

Abstract: A solid-state imaging device with high versatility having a cavity-less CSP structure capable of reducing the occurrence of flare and also being applied to chip size reduction, a method for manufacturing a cover glass, and an electronic apparatus. A solid-state imaging device includes: a sensor substrate in which a plurality of pixels is arranged; a semiconductor substrate having an upper surface on which the sensor substrate is mounted, the semiconductor substrate being configured to connect an electric signal converted by the pixel to a bump or an external connection terminal disposed on a lower surface; a microlens array disposed on an upper surface of the sensor substrate; a resin disposed on an upper surface of the microlens array; and a cover glass bonded to the microlens array via the resin and having a moth-eye structure on a surface of the cover glass.

Abstract: An optical processor is presented for applying optical processing to a light field passing through a predetermined imaging lens unit. The optical processor comprises a pattern in the form of spaced apart regions of different optical properties. The pattern is configured to define a phase coder, and a dispersion profile coder. The phase coder affects profiles of Through Focus Modulation Transfer Function (TFMTF) for different wavelength components of the light field in accordance with a predetermined profile of an extended depth of focusing to be obtained by the imaging lens unit. The dispersion profile coder is configured in accordance with the imaging lens unit and the predetermined profile of the extended depth of focusing to provide a predetermined overlapping between said TFMTF profiles within said predetermined profile of the extended depth of focusing.

Abstract: A camera module includes: a lens module including a plurality of lenses; a housing accommodating the lens module; a reflective member disposed in front of the lens module; an image sensor module to receive light passing through the lens module; and a first light shielding plate disposed in the housing in a space between the lens module and the image sensor module.

Abstract: Disclosed are systems and methods for manufacturing energy relays for energy directing systems. Methods and devices are disclosed for forming random and non-random patterns of energy relay materials with energy localization properties. Methods and devices are disclosed for forming energy relays of different shapes.

Abstract: The present invention embodiment discloses a splicing display module and a display device. The splicing display module includes at least two first display regions and a splicing region located between adjacent two of the first display regions. The splicing display module includes at least two display panels and optical parts. Each display panel includes a display portion and anon-display portion located around the display portion. The display portion includes a planar display sub-portion and a curved surface display sub-portion. The curved surface display sub-portion corresponds to the splicing region. The planar display sub-portion corresponds to the first display region. The optical part corresponds to the curved surface display sub-portion and is located on a light exiting side of the curved surface display sub-portion to refract light emitted from the curved surface display sub-portion to be along a direction away from the first display region of a corresponding display panel.

Abstract: A die including a substrate having a surface defined by paired oppositely-oriented edges; and an optical material, in a non-rectangular shape, and on the surface of the substrate; wherein the optical material does not extend an entire length of any one of the paired oppositely-oriented edges is disclosed, A wafer can including a plurality of the dies. Methods of making the wafer and the die are also disclosed.

Abstract: A unidirectional perspective film includes a first niobium oxide layer, a first silicon oxide layer, an absorption layer, a second niobium oxide layer, and a second silicon oxide layer that are sequentially disposed. The absorption layer has a thickness ranging from 8 nm to 20 nm.

Abstract: Optical structures, including thin film designs and components with topography, are provided that achieve significantly improved laser damage thresholds and/or ultra-low-loss. These advances may be achieved by utilizing a bulk window comprising a material having a band gap that is at least 5.0 eV and a thickness. The bulk window can be configured to increase the laser induced damage threshold of the underlying optical structure.

Abstract: A method of fabricating a blazed diffraction grating comprises providing a master template substrate and imprinting periodically repeating lines on the master template substrate in a plurality of master template regions. In some embodiments, the periodically repeating lines in different ones of the master template regions extend in different directions. The method additionally comprises using at least one of the master template regions as a master template to imprint at least one blazed diffraction grating pattern on a grating substrate. In some embodiments, the method further comprises coating the periodically repeating lines with a material having a greater hardness than the material that forms the lines.

Abstract: Provided is a transmissive liquid crystal diffraction element that can diffract different polarized light components in the same direction and has high diffraction efficiency with respect to unpolarized light.

Abstract: A filter assembly includes a filter holder, a first filter set, a second filter set, a third filter set, and a fourth filter set. A first category of filters is capable of changing light effect by rotating. The first category of the filters is served as the first filter set, which is connected to the filter holder, and the light effect is changed by the rotation of the first filter set relative to the filter holder. A second category of filters changes the light effect by two filters relatively rotating or synchronously rotating with the first category of the filters. Regardless of form of rotation, a third category of filters does not change the light effect. The third category of the filters is served as the fourth filter set, which is disposed on a side of the third filter set facing away from the filter holder.

Abstract: Provided are a lens device, an imaging apparatus, and a filter unit capable of suppressing occurrence of ghosts and flares. The lens device includes a first optical filter and a second optical filter in order from an object side in an optical path. The first optical filter is composed of an optical filter (for example, a band-pass filter) that has a light transmission band in a specific wavelength region. The second optical filter is composed of an optical filter (band-stop filter) that has a light absorption band in a wavelength region which is different from the light transmission band of the first optical filter.

Abstract: Epoxy-based inline infrared (IR) filter assembly, and manufacture and use of the same. Co-axial infrared filter assemblies comprise a substantially cylindrical filter body forming a central cavity characterized by opposing holes at each end. The filter body forms an outer conductor, and SMA connectors coupled to the opposing holes at each end of the body are electrically coupled to form an inner conductor positioned along a long axis of the filter body. An infrared absorbing material (such as castable epoxy resin) fills the central cavity of the filter body. Methods for producing the co-axial infrared filter include pressing SMA connectors into the respective ends of the filter body, electrically coupling the SMA connectors, and filling the filter body with epoxy. Electronic systems for operating a dark matter detector include a feedline comprising a coaxial filter configured to advantageously block infrared noise.

Abstract: A polarization film according to an embodiment includes a first wavelength dispersion layer, and a polarization layer that is disposed on the first wavelength dispersion layer. A wavelength dispersion of the first wavelength dispersion layer satisfies both Relational Expression 1 and Relational Expression 2: [Relational Expression 1] 0.81<DSP 450 nm=R 450 nm/R 550 nm<0.83 [Relational Expression 2] 1.15<DSP 650 nm=R 650 nm/R 550 nm<1.17. In Relational Expression 1 and Relational Expression 2, R(?) denotes a phase difference value in wavelength ?.

Abstract: A holographic optical element (HOE). The HOE includes a hologram, and an electroactive polymer (EAP), in particular a dielectric elastomer actuator (DEA). The electroactive polymer includes at least one elastomer layer, in particular an elastomer film, arranged between two electrodes, and the hologram is applied to an electrode of the electroactive polymer. The hologram or a holographic function which can be provided by means of the hologram, and in particular diffraction properties of the hologram, can be adapted by means of a controllable deformation of the electroactive polymer. A method for producing such a holographic optical element is also described.

Abstract: The present disclosure relates to an optical transfer device for tissue treatment. An optical transfer device of the present disclosure includes an optical probe having a light divergence part at the longitudinal end thereof, and a coating part configured to surround the optical probe, wherein the coating part includes a light diffusion part formed at the end thereof configured to cover the light divergence part, the light diffusion part having multiple grooves formed thereon.

Abstract: Provided are a light guide plate assembly, a backlight module, and a display device, which relate to the field of display technologies, and improve uniformity of the light intensity of light emitted from different areas in the light guide plate assembly. The light guide plate assembly includes a reflection portion having an aperture; and a transmission portion. At least part of the transmission portion is located in the aperture. The transmission portion includes a converging portion and a diverging portion. A curvature of a surface of the converging portion adjacent to a light-incoming side of the light guide plate assembly is greater than or equal to 0, and a curvature of a surface of the diverging portion adjacent to the light-incoming side of the light guide plate assembly is smaller than or equal to 0.

Abstract: A wide-area waveguide illumination system is provided, including an optical waveguide formed from a sheet of optically transmissive material having a generally uniform thickness. The waveguide comprises a first broad-area surface, an opposing second broad-area surface, and a first light input edge. One or more solid-state light sources are optically coupled to the first light input edge. An image print, comprising a viewable surface, is disposed in an energy receiving relationship with the optical waveguide. The system also includes a two-dimensional pattern of light extraction features distributed over the area of the optical waveguide with variable areal density, defining a plurality of higher-density light extraction areas and a plurality of lower-density light extraction areas. The distances between the light extraction features in the higher-density light extraction areas are generally less than in the lower-density light extraction areas.

Abstract: A light source device includes a light guide plate, an optical adhesive, and a light source element. The light guide plate includes a light guide substrate and an enhancement layer. The light guide substrate has a light incident surface, a first surface, and a second surface. The first surface is opposite to the second surface, and the light incident surface extends between the first surface and the second surface. The enhancement layer is disposed on the light guide substrate. A thickness of the enhancement layer is from 1 micrometer to 25 micrometers and a first refractive index of the light guide substrate is greater than a second refractive index of the enhancement layer. The optical adhesive is interposed between the first surface of the light guide substrate and the optical adhesive. The light source element is disposed beside the light incident surface to emit light toward the light incident surface.

Abstract: Provided is a method for manufacturing a light-mixing plate. The method includes disposing a plurality of shielding structures on a transparent substrate; forming a light-shielding film layer on the transparent substrate where the plurality of shielding structures are disposed, wherein a hole is formed at a position, corresponding to each of the plurality of shielding structures, of the light-shielding film layer; and removing the plurality of shielding structures.

Abstract: A decoration plate including a light guide substrate, a decorative film, and a circuit board assembly is provided. The light guide substrate has a first surface and a second surface disposed on opposite sides, and has a first groove on the first surface. The decorative film is disposed on the second surface of the light guide substrate. The decorative film defines an operating region. The circuit board assembly is disposed on the first surface. The circuit board assembly includes a light-emitting element and a touch sensing layer. The light-emitting element is accommodated in the first groove. A position of the touch sensing layer corresponds to a position of an orthogonal projection of the operating region on the first surface.

Abstract: The number of light sources that emit light according to identification information regarding an input device is reduced. An input device (10) includes a first light source (S1), a second light source (S2), a first illumination part (E1) that is illuminated by light from the first light source (S1) in order to indicate identification information allocated to the input device, two second illumination parts (E2) that are placed at positions different from a position of the first illumination part (E1) and that are illuminated by light from the second light source in order to indicate the identification information, and a light guide member (50) that guides the light from the second light source (E2) to the two second illumination parts (E2).