Abstract: A location positioning device for a moving body acquires, via a communication device, a captured image from a camera in which an imaging direction has changed from a first direction to a second direction, the captured image including at least one marker disposed in space and at least one moving body that moves in the space, detects, based on the captured image and initial data, a change of the imaging direction from the first direction to the second direction, and acquires, based on the captured image, location data of the at least one moving body without returning the imaging direction of the camera in a real world to the first direction from the second direction.

Abstract: A position obtaining device includes a processor. The processor, in response to a condition being met, derives a first attitude angle as an attitude angle of the device based on first light sources and positions thereof on an image obtained by a first camera; in response to the attitude angle of the device being known, derives a three-dimensional position of the device based on two or more second light sources and positions thereof on an image obtained by a second camera, and in response to a predetermined number of second light sources or more being captured in the image, derives the three-dimensional position and a second attitude angle as the attitude angle of the device; and integrates a result of the first attitude angle and a result of the three-dimensional position and the second attitude angle to estimate the attitude angle and the three-dimensional position of the device.

Abstract: An object of the present disclosure is to provide a loss analysis device and a loss analysis method of detecting an event with high reproducibility when an SN ratio is small or when an event interval is short. According to the present disclosure, a loss analysis device includes an OTDR waveform acquisition unit that acquires an OTDR waveform of a measurement target optical fiber, and a calculation unit that performs nonlinear fitting of an event model function to the OTDR waveform and calculates a position of a start point of each event included in the OTDR waveform, a level at the start point of each event, a loss of each event, and a return loss of each event, the event model function using the position, the level, the loss, and the return loss as parameters.

Abstract: According to the present disclosure, an optical pulse test device includes an OTDR waveform measurement unit that measures an OTDR waveform with a plurality of pulse widths, an event analysis unit that calculates a level, a loss, and a return loss at a start point of each event, and an analysis result integration unit that calculates a cumulative loss at the start point and an end point of each event from the level, the loss, and the return loss at the start point of each event, determines a pulse width that enables securing of a required SN ratio or more for each of the start point and the end point of each event, integrates the cumulative loss at each of the start point and the end point of each event with the determined pulse width, and sets the integrated cumulative loss as an analysis result.

Abstract: An object of the present disclosure is to improve an SN ratio while maintaining a distance resolution and to accurately detect an event occurrence location. An event detection device according to the present disclosure includes: an OTDR waveform acquisition unit that acquires an OTDR waveform of an optical fiber to be measured; a feature quantity extraction unit that performs wavelet transform on the OTDR waveform and generates a scalogram with each wavelet coefficient as a feature quantity; a peak extraction unit that calculates a noise threshold value from the OTDR waveform, and extracts a peak from the feature quantity on the scalogram based on the noise threshold value to generate a peak graph; and an event identification unit that identifies an event in the optical fiber to be measured from the peak graph.

Abstract: Provided are an optical spectrum analyzer and a pulse-modulated light measurement method capable of measuring pulse-modulated light even when a pulse-on time and a pulse period of the pulse-modulated light are unknown. Pulse-modulated light (DUT) is incident on a diffraction grating 3. A first light receiving unit 8 receives the 0th-order light of diffracted light diffracted by the diffraction grating 3. A second light receiving unit 7 receives diffracted light of an order other than the 0th-order light. A measurement timing signal generation unit 9 generates a sampling signal based on the 0th-order light received by the first light receiving unit. The spectrum of the diffracted light received by the second light receiving unit is measured based on the sampling signal generated by the measurement timing signal generation unit.

Abstract: It is possible to allow a user to easily distinguish between an event at a place to be resolved and an event at a place having no problem on a path of a PON communication network to be measured. A light intensity distribution of return light is processed in a time-series order to detect an event at each position on a network. A parameter N1 relating to the total number of splitters present on a path of the network is specified, the number N2 of detections of the total number of splitters detected as an event is recognized, and in a case where “N1>N2”, a last detected event is associated with one optical splitter and is further displayed as an “uncertain splitter” in distinction from a normal splitter.

Abstract: An optical spectrum analyzer is provided that can separate measurement target light into orthogonal polarization components and perform measurement and enable optical spectrum measurement that does not depend on polarization of the measurement target light. Measurement target light is separated into two orthogonal polarization components, the two polarization components whose position is shifted in an engraved line direction of a diffraction grating are incident on the diffraction grating, diffracted light of the two polarization components emitted from the diffraction grating is condensed, and the condensed diffracted light is incident on an incident side end surface of a 2-core ferrule with the two polarization components adjacent to each other.

Abstract: An information processing device includes a picture image inputter configured to acquire a picture image imaged by a camera and at least one processor configured to execute a program stored in a memory. The at least one processor detects, from the picture image acquired by the picture image inputter, light emitted by a light-emission device, acquires, based on brightness of the detected light emitted by the light-emission device, set brightness information indicating an appropriate brightness for light to be emitted by the light-emission device, and transmits the acquired set brightness information to the light-emission device.

Abstract: An optical spectrum analyzer is provided that can separate measurement target light into orthogonal polarization components and perform measurement and enable optical spectrum measurement that does not depend on polarization of the measurement target light. Measurement target light is separated into two orthogonal polarization components, the two polarization components whose position is shifted in an engraved line direction of a diffraction grating are incident on the diffraction grating, diffracted light of the two polarization components emitted from the diffraction grating is condensed, and the condensed diffracted light is incident on an incident side end surface of a 2-core ferrule with the two polarization components adjacent to each other.

Abstract: Provided are an optical spectrum analyzer and a pulse-modulated light measurement method capable of measuring pulse-modulated light even when a pulse-on time and a pulse period of the pulse-modulated light are unknown. Pulse-modulated light (DUT) is incident on a diffraction grating 3. A first light receiving unit 8 receives the 0th-order light of diffracted light diffracted by the diffraction grating 3. A second light receiving unit 7 receives diffracted light of an order other than the 0th-order light. A measurement timing signal generation unit 9 generates a sampling signal based on the 0th-order light received by the first light receiving unit. The spectrum of the diffracted light received by the second light receiving unit is measured based on the sampling signal generated by the measurement timing signal generation unit.

Abstract: A location positioning device for a moving body acquires, via a communication device, a captured image from a camera in which an imaging direction has changed from a first direction to a second direction, the captured image including at least one marker disposed in space and at least one moving body that moves in the space, detects, based on the captured image and initial data, a change of the imaging direction from the first direction to the second direction, and acquires, based on the captured image, location data of the at least one moving body without returning the imaging direction of the camera in a real world to the first direction from the second direction.

Abstract: It is possible to allow a user to easily distinguish between an event at a place to be resolved and an event at a place having no problem on a path of a PON communication network to be measured. A light intensity distribution of return light is processed in a time-series order to detect an event at each position on a network. A parameter N1 relating to the total number of splitters present on a path of the network is specified, the number N2 of detections of the total number of splitters detected as an event is recognized, and in a case where “N1>N2”, a last detected event is associated with one optical splitter and is further displayed as an “uncertain splitter” in distinction from a normal splitter.

Abstract: An information processing device includes a picture image inputter configured to acquire a picture image imaged by a camera and at least one processor configured to execute a program stored in a memory. The at least one processor detects, from the picture image acquired by the picture image inputter, light emitted by a light-emission device, acquires, based on brightness of the detected light emitted by the light-emission device, set brightness information indicating an appropriate brightness for light to be emitted by the light-emission device, and transmits the acquired set brightness information to the light-emission device.

Abstract: An optical time domain reflectometer includes: a storage unit that stores in advance a fourth backscattered light level PZ(W2) obtained by adding a difference ?PR between a second backscattered light level PR(W1) which is measured using a first pulse width W1 and a third backscattered light level PR(W2) which is measured using a second pulse width W2 to a first backscattered light level PZ(W1) at a connection point DD to a measurement target optical fiber which is measured using the first pulse width so as to be associated with the second pulse width; and an arithmetic processing unit that reads the fourth backscattered light level PZ(W2) at the second pulse width corresponding to a pulse width of an optical pulse output from a light source to the measurement target optical fiber from the storage unit and calculates a transmission loss LT in the measurement target optical fiber.

Abstract: A remaining battery capacity measuring device within a control device of a mobile apparatus measures a remaining battery capacity level of a battery. The light-emission control device, in a period separate from a transmission period for transmitting an ID, in accordance with the remaining charge amount of the battery, performs changing of a hue of light emitted by an LED, and setting no-data and a no-data period. Alternatively, the light-emission control device, in the period separate from the transmission period for transmitting the ID, in reaction to the remaining battery capacity level of the battery, changes a luminosity of the light emitted by the LED.

Abstract: An optical time domain reflectometer includes: a storage unit that stores in advance a fourth backscattered light level PZ(W2) obtained by adding a difference ?PR between a second backscattered light level PR(W1) which is measured using a first pulse width W1 and a third backscattered light level PR(W2) which is measured using a second pulse width W2 to a first backscattered light level PZ(W1) at a connection point DD to a measurement target optical fiber which is measured using the first pulse width so as to be associated with the second pulse width; and an arithmetic processing unit that reads the fourth backscattered light level PZ(W2) at the second pulse width corresponding to a pulse width of an optical pulse output from a light source to the measurement target optical fiber from the storage unit and calculates a transmission loss LT in the measurement target optical fiber.

Abstract: A remaining battery capacity measuring device within a control device of a mobile apparatus measures a remaining battery capacity level of a battery. The light-emission control device, in a period separate from a transmission period for transmitting an ID, in accordance with the remaining charge amount of the battery, performs changing of a hue of light emitted by an LED, and setting no-data and a no-data period. Alternatively, the light-emission control device, in the period separate from the transmission period for transmitting the ID, in reaction to the remaining battery capacity level of the battery, changes a luminosity of the light emitted by the LED.

Abstract: An end face inspection apparatus which inspects an end face of an test object, and includes optical system causing an image acquisition unit to form an image of an end face of a held test object, focusing degree changing means for changing a distance between the end face of the test object and a focal position of the optical system, and a control unit processing image data acquired in the image acquisition unit. The end face inspection apparatus acquires a series of image data which is output from the image acquisition unit at a preset time interval while the distance between the end face of the test object and the focal position of the optical system is changed, determines whether or not each piece of the image data is focused, and selects focused image data as image data for end face inspection.

Abstract: An optical time domain reflectometer includes: an OTDR measurement unit; an event detection unit that detects an event using the measurement result of the OTDR measurement unit; a display unit that displays a plurality of icons indicating events in an event display region AIV and displays information of an event, which is located in a specific region AATT of the event display region AIV, in an information display region AINF; an operation detection unit that detects a swipe operation in the event display region AIV; and an event-of-interest changing unit that scrolls the events displayed in the event display region AIV according to the swipe operation to change the display of the information display region AINF to information corresponding to the event indicated by the icon located in the specific region AATT.