WO2022004106A1 - 受光装置および通信装置 - Google Patents

受光装置および通信装置 Download PDF

Info

Publication number
WO2022004106A1
WO2022004106A1 PCT/JP2021/016471 JP2021016471W WO2022004106A1 WO 2022004106 A1 WO2022004106 A1 WO 2022004106A1 JP 2021016471 W JP2021016471 W JP 2021016471W WO 2022004106 A1 WO2022004106 A1 WO 2022004106A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical signal
light receiving
spatial optical
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2021/016471
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
俊貴 ▲今▼村
紘也 ▲高▼田
藤男 奥村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to DE112021003531.2T priority Critical patent/DE112021003531T5/de
Priority to CN202180046410.8A priority patent/CN115735336A/zh
Priority to US18/012,311 priority patent/US12212370B2/en
Priority to JP2022533701A priority patent/JP7574850B2/ja
Publication of WO2022004106A1 publication Critical patent/WO2022004106A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/695—Arrangements for optimizing the decision element in the receiver, e.g. by using automatic threshold control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/67—Optical arrangements in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/60—Receivers
    • H04B10/66—Non-coherent receivers, e.g. using direct detection
    • H04B10/69—Electrical arrangements in the receiver
    • H04B10/697—Arrangements for reducing noise and distortion
    • H04B10/6972—Arrangements for reducing noise and distortion using passive filtering
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/413—Optical elements or arrangements directly associated or integrated with the devices, e.g. back reflectors

Definitions

  • the present invention relates to a light receiving device or the like used for optical space communication.
  • Patent Document 1 discloses a light receiving device of an optical communication device that communicates between distant points by an optical signal.
  • the light receiving device of Patent Document 1 converts the incident light collected by the condenser lens into parallel light by a collimating lens having a focal length shorter than the focal length of the condenser lens.
  • the light receiving device of Patent Document 1 has a bandpass filter that transmits only the wavelength of light incident perpendicular to the filter surface.
  • the light receiving device of Patent Document 1 filters parallel light from a collimated lens by a bandpass filter.
  • the light receiving device of Patent Document 1 detects parallel light filtered by a bandpass filter with a light receiving element.
  • Patent Document 2 discloses an optical sensor used as a proximity sensor or a gesture sensor.
  • the optical sensor of Patent Document 2 includes a light emitting element and a plurality of first light receiving elements.
  • the plurality of first light receiving elements are arranged in an annular shape at the end of the region where the reflected light reflected by the detection object is incident among the light emitted from the light emitting element.
  • the plurality of first light receiving elements receive the reflected light and generate a photocurrent.
  • the apparatus of Patent Document 2 detects the moving direction of the object to be detected based on the photocurrent generated from the first light receiving element.
  • Patent Document 3 discloses a defect inspection device that detects defects such as directional characteristics and overall unevenness in a flat surface display device.
  • the device of Patent Document 3 includes a detector unit composed of a condenser lens and a detector unit.
  • the condenser lens is arranged so that the display surface, which is the inspection target surface of the flat display device held in a horizontal state, coincides with the front focal position.
  • the two-dimensional sensor array is arranged behind the condenser lens, and is configured by arranging a plurality of sensor elements in a two-dimensional direction.
  • the device of Patent Document 3 moves the detector unit relatively in parallel with the plane display device, collects the light from the display surface with a condenser lens, and causes the light to be incident on the two-dimensional sensor array.
  • the apparatus of Patent Document 3 detects a defect on the display surface by processing a signal output from the two-dimensional sensor array.
  • the light receiving device of Patent Document 1 filters only the wavelength of the incident light incident perpendicular to the filter surface. Therefore, the light receiving device of Patent Document 1 has a problem that the light receiving angle is small and the light receiving efficiency is low. Further, the light receiving device of Patent Document 1 has a problem that the arrival direction of an optical signal cannot be determined.
  • the optical sensor of Patent Document 2 detects the moving direction of the detection object by determining which of the plurality of first light receiving elements receives the reflected light reflected by the detection object.
  • the optical sensor of Patent Document 2 cannot detect the moving direction of the detection target due to the influence of ambient light, and therefore, it should be applied to optical space communication using spatial light arriving from a distance. I could't.
  • the device of Patent Document 3 can detect defects such as directional characteristics on the display surface of the flat display device when the display surface of the flat display device is arranged so as to coincide with the front focal position of the condenser lens.
  • the device of Patent Document 3 cannot detect directional characteristics and the like on the display surface of the flat display device unless the display surface of the flat display device is arranged so as to coincide with the front focal position of the condenser lens. Therefore, the device of Patent Document 3 cannot be applied to optical space communication using spatial light.
  • An object of the present invention is to provide a light receiving device or the like that efficiently receives spatial optical signals coming from various directions and enables simultaneous communication with a plurality of communication targets.
  • a lens that collects a spatial optical signal
  • a sensor array including a plurality of light receivers that receive the spatial optical signal collected by the lens, and each of the plurality of light receivers receive light. It is provided with a receiving unit that integrates an electric signal derived from the spatial optical signal and selects a light receiver that receives the spatial optical signal according to the voltage value of the integrated electric signal.
  • the communication device of one aspect of the present invention includes a lens that collects a first space optical signal transmitted from at least one communication object, and a plurality of light receivers that receive the first space optical signal collected by the lens.
  • a receiver that integrates the electrical signals derived from the first space optical signal received by each of the sensor array including the A light receiving unit including a light receiving unit, a light transmitting unit that transmits a second space optical signal according to a first space optical signal received by the light receiving unit, and a first light receiving unit received by the light receiving unit. It is provided with a light transmission control unit that controls the light transmission unit according to the space optical signal and transmits the second space optical signal to the light transmission unit with respect to the communication target of the light transmission source of the first space optical signal.
  • the present invention it is possible to provide a light receiving device or the like that efficiently receives spatial optical signals coming from various directions and enables simultaneous communication with a plurality of communication targets.
  • the light receiving device of this embodiment is used for optical space communication using a spatial optical signal.
  • the light receiving device of the present embodiment receives a spatial optical signal transmitted from a communication target.
  • the light receiving device of the present embodiment identifies the communication device from which the spatial light signal is transmitted, based on the received spatial light signal. For example, when the communication device equipped with the light receiving device of the present embodiment specifies the communication device from which the spatial optical signal is transmitted, the communication device transmits the spatial optical signal to the specified communication device.
  • the light for searching the communication target and the light carrying the information exchanged with the communication target are referred to as spatial optical signals.
  • the spatial optical signal includes identification information for uniquely identifying the communication device of the light transmission source.
  • FIG. 1 is a conceptual diagram showing an example of the configuration of the light receiving device 10 of the present embodiment.
  • the light receiving device 10 includes a sensor array 11, a lens 12, and a receiving unit 13.
  • the sensor array 11 has a plurality of receivers 110.
  • the sensor array 11 has a structure in which a plurality of light receivers 110 are arranged in an array.
  • the plurality of light receivers 110 included in the sensor array 11 are arranged with the light receiving surface facing the lens 12.
  • the light receiving surface of the plurality of light receivers 110 forms the light receiving surface of the sensor array 11.
  • the sensor array 11 is arranged so that the light receiving surface is located between the main surface of the lens 12 and the focal surface of the lens 12.
  • the focal plane of the lens 12 is formed on the other side of the sensor array 11 when viewed from the lens 12.
  • a spatial optical signal is incident on the light receiving surface of the light receiver 110.
  • the light receiver 110 converts the spatial optical signal received on the light receiving surface into an electric signal (hereinafter, also referred to as a signal).
  • the receiver 110 outputs the converted signal to the receiving unit 13.
  • the receiver 110 is realized by a photodiode (PD: Photodiode).
  • PD Photodiode
  • the receiver 110 is realized by a PN-type photodiode, a PIN-type photodiode, or an avalanche photodiode.
  • the photodetector 110 may be a photodetector other than a photodiode as long as it can convert the received spatial optical signal into an electric signal.
  • the receiver 110 has sensitivity in the wavelength band of the spatial optical signal used for optical spatial communication.
  • the photoreceiver 110 has sensitivity in the wavelength band in the visible region.
  • the photoreceiver 110 may have sensitivity in an infrared region or an ultraviolet region.
  • the wavelength band that the light receiver 110 receives may be selected according to the wavelength band of the spatial optical signal used for optical space communication.
  • the lens 12 is arranged at a position where it can receive a spatial optical signal from the outside.
  • the lens 12 is arranged so that the light receiving surface of the sensor array 11 is located between the main surface and the focal surface.
  • the focal plane of the lens 12 is formed on the other side of the sensor array 11 when viewed from the lens 12.
  • the lens 12 is an optical lens that focuses a spatial optical signal on the light receiving surface of the sensor array 11.
  • the spatial optical signal focused by the lens 12 is applied to the light receiving surface of the sensor array 11. Since the light receiving surface of the sensor array 11 is arranged in front of the focal plane of the lens, a wide spatial optical signal is received on the light receiving surface of the sensor array 11.
  • the receiving unit 13 receives signals from each of the plurality of receivers 110 constituting the sensor array 11.
  • the receiving unit 13 integrates the received signals.
  • the receiving unit 13 estimates the arrival direction of the spatial optical signal received by the plurality of light receivers 110 based on the integrated signal.
  • the receiving unit 13 specifies that the communication target is located in the direction of arrival of the spatial optical signal.
  • the receiving unit 13 associates the specified communication target with the light receiver 110 that receives the spatial optical signal from the communication target.
  • the receiving unit 13 amplifies the electric signal from the receiver 110 associated with the communication target.
  • the receiving unit 13 decodes the amplified electric signal and analyzes the signal from the communication target.
  • FIG. 2 is a block diagram showing an example of the configuration of the receiving unit 13.
  • the receiving unit 13 has a plurality of first processing circuits 15-1 to M, a control circuit 16, a selector 17, and a plurality of second processing circuits 18-1 to N (M and N are natural numbers).
  • M and N are natural numbers.
  • the internal configuration of only the first processing circuit 15-1 is shown among the plurality of first processing circuits 15-1 to M, but the internal configuration of the plurality of first processing circuits 15-2 to M is shown. Is the same as that of the first processing circuit 15-1.
  • the first processing circuit 15 includes a high-pass filter 151, an amplifier 153, and an integrator 155.
  • the high-pass filter 151 is referred to as HPF (High Path Filter)
  • the amplifier 153 is referred to as AMP (Amplifier)
  • the integrator 155 is referred to as INT (Integrator).
  • the signal that has passed through the high-pass filter 151 is input to the amplifier 153 and the integrator 155 in parallel.
  • the light receiver 110 and the first processing circuit form a unit unit for each light receiver 110.
  • the high-pass filter 151 acquires a signal from the receiver 110.
  • the high-pass filter 151 selectively passes a signal having a high frequency component corresponding to the wavelength band of the spatial optical signal among the acquired signals.
  • the high-pass filter 151 cuts signals derived from ambient light such as sunlight.
  • a band-pass filter that selectively passes a signal in the wavelength band of the spatial optical signal may be configured.
  • a color filter that selectively passes light in the wavelength band of the spatial optical signal may be installed in front of the light receiving surface of the light receiving device 110.
  • the signal that has passed through the high-pass filter 151 is supplied to the amplifier 153 and the integrator 155.
  • the amplifier 153 acquires the signal output from the high-pass filter 151.
  • the amplifier 153 amplifies the acquired signal.
  • the amplifier 153 outputs the amplified signal to the selector 17.
  • the signal to be received is assigned to any of the plurality of second processing circuits 18-1 to N according to the control of the control circuit 16.
  • the signal to be received is a signal from the receiver 110 that receives a spatial optical signal from a communication device (not shown) to be communicated.
  • the signal from the receiver 110 that is not used for receiving the spatial optical signal is not output to the second processing circuit 18.
  • the integrator 155 acquires the signal output from the high-pass filter 151.
  • the integrator 155 integrates the acquired signal.
  • the integrator 155 outputs the integrated signal to the control circuit 16.
  • the integrator 155 is arranged to measure the intensity of the spatial optical signal received by the light receiver 110.
  • the speed of searching for a communication target is increased by receiving a spatial optical signal having a wide beam diameter on the light receiving surface of the sensor array 11. Since the intensity of the spatial optical signal received when the beam diameter is not narrowed is weaker than that when the beam diameter is narrowed, it is difficult to measure the voltage of the signal amplified only by the amplifier 153. ..
  • the integrator 155 for example, the voltage of the signal can be increased to a level at which the voltage can be measured by integrating from several msec (millisecond) to several tens of msec.
  • the control circuit 16 acquires the signal output from the integrator 155 included in each of the plurality of first processing circuits 15-1 to M. In other words, the control circuit 16 acquires a signal derived from the spatial optical signal received by each of the plurality of light receivers 110. The control circuit 16 compares the readings of the signals derived from the plurality of receivers 110 adjacent to each other, and selects the receiver 110 having the maximum signal strength. The control circuit 16 controls the selector 17 so that the signal derived from the selected light receiver 110 is assigned to any of the plurality of second processing circuits.
  • the selection of the light receiver 110 by the control circuit 16 corresponds to estimating the arrival direction of the spatial optical signal. That is, selecting the receiver 110 by the control circuit 16 corresponds to specifying the communication device from which the spatial optical signal is transmitted. Further, assigning the signal derived from the selected receiver 110 to any of the plurality of second processing circuits causes the specified communication target and the receiver 110 to receive the spatial optical signal from the communication target. Corresponds to associating. That is, the control circuit 16 identifies the communication device from which the spatial optical signal is transmitted, based on the spatial optical signal received by the sensor array 11. For example, when a communication device (not shown) equipped with the light receiving device 10 of the present embodiment specifies a communication device (not shown) from which a spatial optical signal is transmitted, a spatial optical signal is transmitted to the specified communication device. Send light.
  • the signal amplified by the amplifier 153 included in the plurality of first processing circuits 15-1 to M is input to the selector 17.
  • the selector 17 outputs the signal to be received among the input signals to any one of the plurality of second processing circuits 18-1 to N according to the control of the control circuit 16.
  • a signal that is not a reception target is not output from the selector 17.
  • a signal derived from the receiver 110 assigned by the control circuit 16 is input to the second processing circuit 18.
  • the second processing circuit 18 decodes the input signal.
  • the second processing circuit 18 may be configured to add some signal processing to the decoded signal, or may be configured to output to an external signal processing device or the like (not shown).
  • one second processing circuit is assigned to one communication target. That is, the control circuit 16 allocates a signal derived from a spatial optical signal from a plurality of communication targets received by the sensor array 11 to any of the plurality of second processing circuits 18-1 to N.
  • the light receiving device 10 can simultaneously read signals derived from spatial optical signals from a plurality of communication targets on individual channels.
  • spatial optical signals from a plurality of communication targets are read in a time division manner in one channel.
  • spatial optical signals from a plurality of communication targets are simultaneously read in a plurality of channels, so that the transmission speed is improved.
  • the signal may be received in a time-division manner depending on the situation.
  • the scan of the communication target using the integrator 155 may be performed as a primary scan, and the arrival direction of the spatial optical signal may be specified with coarse accuracy. Then, a secondary scan with fine accuracy may be performed in the specified direction to specify a more accurate position of the communication target.
  • the exact position of the communication target can be determined by exchanging signals with the communication target. For example, when the light receiving device 10 is mounted on a moving body, if the position of the communication target can be accurately determined, the movement direction and speed of each other can be shared through communication with the communication target. If we can share the movement direction and speed of each other, we can predict and control the positional relationship with each other with higher accuracy.
  • FIG. 3 is an example of the circuit configuration of the integrator 155 (integrator 155-1).
  • the integrator 155-1 includes a resistor R, an operational amplifier OP, a capacitor C, and a switch SW.
  • the terminal on the left side is referred to as the first end, and the terminal on the right side is referred to as the second end.
  • the operational amplifier OP has an inverting input terminal V-, a non-inverting input terminal V +, and an output terminal.
  • the first end of the resistor R is connected to the input end Vin.
  • the second end of the resistor R is connected to the inverting input terminal V-of the operational amplifier OP, the first end of the capacitor C, and the first end of the switch SW.
  • the inverting input terminal V- of the operational amplifier OP is connected to the second end of the resistor R, the first end of the capacitor C, and the first end of the switch SW.
  • the non-inverting input terminal V + of the operational amplifier is grounded.
  • the output terminal of the operational amplifier OP is connected to the output terminal Vout, the second end of the capacitor, and the second end of the switch SW.
  • the first end of the capacitor is connected to the second end of the resistor R, the inverting input terminal V- of the operational amplifier OP, and the first end of the switch SW.
  • the second end of the capacitor is connected to the output terminal of the operational amplifier OP, the second end of the switch SW, and the output end Vout.
  • the first end of the switch SW is connected to the second end of the resistor R, the first end of the capacitor C, and the inverting input terminal V- of the operational amplifier OP.
  • the second end of the switch SW is connected to the second end of the capacitor C, the output terminal of the operational amplifier OP, and the output end Vout.
  • a reset pulse is applied to the switch SW at a predetermined timing.
  • the switch SW is closed only for a predetermined period (reset time Trist) after the reset pulse is applied.
  • the time when the switch is open corresponds to the integration time Tint.
  • the reset time Trist is set to a shorter time than the integration time Tint.
  • FIG. 4 is a graph for explaining the operation of the integrator 155-1.
  • FIG. 4 shows a negative feedback type reset operation of the integrator 155-1 including the operational amplifier OP.
  • the integrator 155-1 functions as a kind of low-pass filter.
  • the integrator 155-1 accumulates an electric charge in the capacitor C during the integration time Tint.
  • a reset pulse is applied to the switch SW, the charge stored in the capacitor C is reset. For example, if the voltage value immediately before reset is read by an AD (Analog-Digital) converter (not shown), the voltage of the signal can be measured.
  • AD Analog-Digital
  • FIGS. 5 and 6 are conceptual diagrams showing how a spatial light signal is incident on the lens 12 included in the light receiving device 10 and the spatial light signal is received by the sensor array 11.
  • the distance between the main surface of the lens 12 and the focal length corresponds to the focal length f.
  • the sensor array 11 is arranged so that the light receiving surfaces of the plurality of light receivers 110 are located between the main surface and the focal plane.
  • the spatial optical signal D1 arrives from below the lens 12.
  • the spatial optical signal D1 that has passed through the lens 12 is focused toward the focal point F1 on the focal plane of the lens 12.
  • the spatial optical signal D1 is received on the surface of the light receiving surface of the light receiving device 110 above the plurality of light receiving devices 110.
  • the spatial optical signal D2 arrives from above the lens 12.
  • the spatial optical signal D2 that has passed through the lens 12 is focused toward the focal point F2 on the focal plane of the lens 12.
  • the spatial optical signal D2 is received on the surface of the light receiving surface of the light receiver 110 below the plurality of light receivers 110.
  • FIG. 7 is a perspective view of the light receiving surface of the sensor array 11 as seen through the lens 12.
  • the spatial optical signal D1 is received by the plurality of receivers 110 below the sensor array 11, and the spatial optical signal is received by the plurality of receivers 110 on the upper left of the sensor array 11.
  • the spatial optical signal is received not only in the vertical direction but also at a position corresponding to the arrival direction in the horizontal direction.
  • the spatial optical signal arriving from a distance is almost parallel light. Therefore, by detecting the position where the spatial optical signal is collected by the sensor array 11, it is possible to estimate from which direction the spatial optical signal arrives.
  • the spatial optical signal collected by the lens 12 is received by the light receiving surfaces of the plurality of light receivers 110.
  • the arrival direction of the spatial optical signal can be estimated from the intensity ratio of the spatial optical signal received by each receiver 110. If the communication device to be communicated is associated with the arrival direction of the spatial optical signal, the light receiver 110 and the communication device can be associated with each other.
  • FIG. 8 is an example in which the spatial optical signal D1 is received on the light receiving surfaces of the light receiver 110-A, the light receiver 110-B, the light receiver 110-C, and the light receiver 110-D that are adjacent to each other.
  • the light receiving area of the light receiver 110-D is the maximum. Therefore, with respect to the spatial optical signal D1, the signal strength in the receiver 110-D is maximized.
  • the light receiving device 10 determines that the light receiving device 110-D has received the spatial optical signal D1.
  • the spatial optical signal can be generated according to the position of the light receiver 110 having the maximum signal intensity. The direction of arrival can be estimated.
  • each of the plurality of spatial optical signals can be determined to be received by the plurality of spatial optical signals based on the identification information and the like included in the signals.
  • FIG. 9 is an example in which a part of the light receiving region of the spatial optical signal D1 and the spatial optical signal D2 overlap.
  • the signal intensity of the spatial optical signal D1 is maximized in the light receiver 110-D
  • the signal intensity of the spatial optical signal D2 is maximum in the light receiver 110-A.
  • the light receiving device 10 determines that the light receiver 110-D has received the spatial light signal D1, and determines that the light receiver 110-A has received the spatial light signal D2.
  • the spatial optical signal D1 and the spatial optical signal D2 can be separated without time division.
  • FIG. 10 is an example in which most of the light receiving regions of the spatial optical signal D1 and the spatial optical signal D2 overlap.
  • the spatial optical signal D1 and the spatial optical signal D2 cannot be separated based on the signal strengths of the spatial optical signal D1 and the spatial optical signal D2.
  • the spatial optical signal D1 and the spatial optical signal D2 can be separated by time-dividing the reception timing of the spatial optical signal D1 and the spatial optical signal D2. Further, it may be configured to notify at least one of a plurality of communication targets having overlapping light receiving regions so as to shift the position.
  • the light receiving device of the present embodiment includes a sensor array, a lens, and a receiving unit.
  • the lens collects the spatial optical signal.
  • the sensor array includes a plurality of photoreceivers that receive the spatial optical signal focused by the lens.
  • the receiving unit integrates the electric signals derived from the spatial optical signals received by each of the plurality of light receivers, and selects a light receiver that receives the spatial optical signals according to the voltage value of the integrated electric signals.
  • the light receiving device of the present embodiment receives the spatial optical signal collected by the lens with at least one of a plurality of light receivers.
  • the light receiving device of the present embodiment integrates an electric signal derived from a spatial optical signal, and selects a light receiver that receives the spatial optical signal according to the voltage value of the integrated electric signal. According to the light receiving device of the present embodiment, it is possible to collectively receive spatial optical signals from a plurality of communication targets and collectively distinguish the transmission sources of those spatial optical signals. Therefore, according to the light receiving device of the present embodiment, it is possible to efficiently receive spatial optical signals coming from various directions.
  • the light receiving surfaces of the plurality of light receivers are arranged in an array on the same surface toward the same direction.
  • the lens is arranged so that the light receiving surfaces of the plurality of light receivers are located between the main surface and the focal plane of the lens.
  • the spatial optical signal by integrating the electric signal derived from the spatial optical signal, the voltage value of the spatial optical signal can be measured even if the spatial optical signal is received on the surface. Therefore, according to this embodiment, since the spatial optical signal can be received with a wide light receiving angle, the light utilization efficiency is high as compared with the case where the spatial optical signal is received at a point.
  • the receiving unit has a plurality of first processing circuits, a selector, a second processing circuit, and a control circuit.
  • the plurality of first processing circuits are associated with each of the plurality of light receivers, amplify the electric signal derived from the spatial optical signal received by each of the plurality of light receivers, and integrate the electric signal.
  • An electric signal amplified by the first processing circuit is input to the selector, and at least one of the input electric signals is selectively output.
  • the second processing circuit decodes the electric signal output from the selector.
  • the control circuit selects a light receiver that receives a spatial optical signal according to the voltage value of the electric signal integrated by the plurality of first processing circuits.
  • the control circuit controls the selector to assign the electrical signal from the selected receiver to any of the plurality of second processing circuits.
  • the control circuit is an electric unit integrated by a plurality of first processing circuits as a receiver for receiving the spatial optical signal when the spatial optical signal is received by a plurality of receivers adjacent to each other. Select the receiver with the highest signal voltage value. For example, when a space optical signal from a plurality of light sources is received by a plurality of light receivers adjacent to each other, the control circuit is spatially arranged according to the voltage value of the electric signal integrated by the plurality of first processing circuits. Select the receiver that receives the optical signal for each light source.
  • the control circuit cannot select a receiver for receiving a spatial optical signal for each light source according to the voltage value of the electric signal integrated by the plurality of first processing circuits, the spatial light in the same receiver is used.
  • the signal is received in time division for each transmission source.
  • a spatial optical signal from a single light source received by a plurality of light receivers can be assigned to any of the light receivers. Further, according to this aspect, spatial optical signals from a plurality of light transmission sources received over a plurality of light receivers can be assigned to any of the light receivers.
  • the light receiving device of the present embodiment is different from the first embodiment in that it includes a light pipe.
  • the light pipe is a member that guides a spatial optical signal received in a gap between a plurality of light receivers constituting the sensor array to each of the plurality of light receivers constituting the sensor array.
  • FIG. 11 is a conceptual diagram showing an example of the configuration of the light receiving device 20 of the present embodiment.
  • the light receiving device 20 includes a sensor array 21, a lens 22, and a receiving unit 23.
  • the sensor array 21 has a plurality of light receivers 210 and a plurality of light pipes 211.
  • a light pipe 211 is arranged in each of the plurality of light receivers 210.
  • the main functions of the sensor array 21, the lens 22, and the receiving unit 23 are the same as those in the first embodiment. In the following, the light pipe 211, which is not included in the light receiving device 10 of the first embodiment, will be described.
  • a gap is generated between the plurality of light receivers 210 constituting the sensor array 21 according to the size of the light receiving surface of the light receiving receiver 210.
  • the gap between adjacent light receiving receivers 210 becomes small.
  • the gap between adjacent light receiving receivers 210 becomes large.
  • a spatial light signal is directly incident on the light receiving surface of the sensor array 21 if the gap between adjacent light receivers 210 is too large compared to the spot diameter of the spatial light signal focused on the light receiving surface, the gap will be created.
  • the spot of the entered spatial optical signal cannot be detected.
  • the spot diameter of the spatial optical signal collected on the light receiving surface of the sensor array 21 is too large, the intensity of the spatial optical signal received by each receiver 210 becomes small. Therefore, when the spatial optical signal is directly incident on the light receiving surface of the sensor array 21, it is necessary to optimize the size of the gap between the adjacent receivers 210 and the spot diameter of the spatial optical signal.
  • FIG. 12 is a perspective view showing a state in which the light pipes 211 are installed on the light receiving surfaces of the plurality of light receivers 210.
  • the light pipe 211 is provided in association with each of the plurality of light receivers 210.
  • the light pipe 211 has an incident surface P1 on which a spatial optical signal is incident and an exit surface P2 from which an optical signal guided inside the light pipe 211 is emitted.
  • the emission surface P2 of the light pipe 211 is arranged in contact with the light receiving surface of the light receiver 210 to which the light pipe 211 is associated.
  • the light emitting surface P2 of the light pipe 211 and the light receiving surface of the light receiver 210 may not be in contact with each other. ..
  • the adjacent light pipes 211 are arranged so that there is no gap between their incident surfaces P1.
  • the focal plane of the lens 22 may be formed on the side of the sensor array 21 with respect to the incident plane P1 of the light pipe 211.
  • the focal plane of the lens 22 may be formed on the front side of the light receiving surface of the sensor array 21 when viewed from the lens 22.
  • FIG. 12 shows an example in which the incident surface P1 and the exit surface P2 are parallel to each other. However, as long as the optical signal can be guided from the incident surface P1 to the exit surface P2, the incident surface P1 and the exit surface P2 are not. It may be parallel.
  • the light pipe 211 can be made of a general optical fiber material.
  • the light pipe 211 is preferably made of a material that easily transmits light in the wavelength band of the spatial optical signal.
  • the inner surface of the light pipe 211 is a mirror surface that reflects an optical signal guided inside the light pipe 211.
  • the optical signal derived from the spatial optical signal incident from the incident surface P1 of the light pipe 211 is guided to the exit surface P2 while being reflected by the inner surface of the light pipe 211.
  • the optical signal guided to the emission surface P2 is emitted from the emission surface P2.
  • the incident surface P1 of the light pipe 211 may be provided with an antireflection layer according to the wavelength band of the spatial optical signal. If the antireflection layer is provided on the incident surface P1, the spatial optical signal reflected by the incident surface P1 can be reduced. Further, a color filter for selectively passing light in the wavelength band of the spatial optical signal may be provided on the incident surface P1 of the light pipe 211. If a color filter is provided on the incident surface P1, light in the wavelength band of the spatial optical signal is selectively guided to the light receiving surface of the light receiver 210, so that noise components included in the spatial optical signal can be removed.
  • the light receiving surface of the light receiver 210 can be made smaller. Therefore, a light receiver 210 having the same light receiving efficiency but a small light receiving surface can be configured. Therefore, when the light pipe 211 is used, the options for the light receiver 210 are expanded. For example, if the light pipe 211 is used, a light receiving device 210 having a small light receiving surface but high sensitivity can be adopted.
  • the sensor array of the light receiving device of the present embodiment is associated with each of the light receiving surfaces of the plurality of light receivers, and a plurality of lights that guide the spatial optical signal to each of the light receiving surfaces of the plurality of light receivers.
  • a plurality of light pipes have an incident surface on which a spatial optical signal is incident and an exit surface on which an optical signal incident from the incident surface is emitted and guided, and the incident surfaces form the same surface without gaps. Arranged to do.
  • each of the plurality of light pipes is arranged with the emission surface facing the associated light receiving surface.
  • the light receiving device of the present embodiment by installing the light pipes on the light receiving surfaces of the plurality of light receiving parts, it is not possible to optimize the size of the gap between the adjacent light receiving parts and the spot diameter of the spatial optical signal. Also, the optical signal derived from the spatial optical signal can be guided to the light receiving surface of each light receiving unit. Therefore, according to the light receiving device of the present embodiment, the spatial optical signal can be received more efficiently.
  • the communication device of the present embodiment includes a light receiving device (also referred to as a light receiving unit) of the first to second embodiments.
  • FIG. 13 is a block diagram showing an example of the configuration of the communication device 3 of the present embodiment.
  • the communication device 3 includes a light receiving unit 30, a light transmitting unit 35, and a light transmitting control unit 37.
  • the light receiving unit 30 corresponds to the light receiving device 10 of the first embodiment or the light receiving device 20 of the second embodiment. In the following, the details of the light receiving unit 30 will be omitted.
  • the light receiving unit 30 receives the spatial optical signal transmitted from the communication device to be communicated.
  • the light receiving unit 30 decodes a signal based on the received spatial optical signal and outputs the decoded signal to the light transmission control unit 37.
  • the light transmission unit 35 transmits a spatial optical signal according to the control of the light transmission control unit 37.
  • the light transmission control unit 37 acquires a signal from the light receiving unit 30.
  • the light transmission control unit 37 controls the light transmission unit 35 according to the signal from the light receiving unit 30.
  • FIG. 14 is a conceptual diagram showing an example of the configuration of the light transmitting unit 35.
  • the light transmitting unit 35 includes a light source 320, a spatial light modulator 330, and a projection optical system 340. Note that FIG. 14 is conceptual and does not accurately represent the positional relationship between each component, the traveling direction of light, and the like.
  • the light source 320 includes an emitter 321 and a collimator 323.
  • the emitter 321 emits the laser beam 301 in a predetermined wavelength band used for spatial optical communication under the control of the light transmission control unit 37.
  • the collimator 323 converts the laser beam 301 emitted from the emitter 321 into the parallel light 302.
  • the laser light 301 emitted from the emitter 321 is converted into parallel light 302 by the collimator 323 and emitted from the light source 320.
  • the parallel light 302 emitted from the light source 320 travels toward the modulation unit of the spatial light modulator 330.
  • the incident angle of the parallel light 302 is not perpendicular to the irradiated surface of the modulation unit of the spatial light modulator 330. That is, the emission axis of the parallel light 302 emitted from the light source 320 is oblique with respect to the irradiated surface of the modulation unit of the spatial light modulator 330. If the emission axis of the parallel light 302 is slanted with respect to the irradiated surface of the modulation unit of the spatial light modulator 330, the parallel light 302 can be incident on the irradiated surface without using a beam splitter. Utilization efficiency can be improved. Further, if the emission axis of the parallel light 302 is set diagonally with respect to the irradiated surface of the modulation unit of the spatial light modulator 330, the size of the light transmission unit can be made compact.
  • the spatial light modulator 330 has a modulator that is irradiated with parallel light 302.
  • a pattern corresponding to the detected light is set according to the control of the light transmission control unit 37.
  • the spatial light modulator 330 is realized by a spatial light modulator using a ferroelectric liquid crystal display, a homogenius liquid crystal display, a vertically oriented liquid crystal display, or the like.
  • the spatial light modulator 330 can be realized by LCOS (Liquid Crystal on Silicon).
  • the spatial light modulator 330 may be realized by a MEMS (Micro Electro Mechanical System).
  • the projection optical system 340 is an optical system that projects the modulated light 303 modulated by the spatial light modulator 330 as a spatial optical signal 305. As shown in FIG. 14, the projection optical system 340 includes a Fourier transform lens 346, an aperture 347, and a projection lens 348.
  • the Fourier transform lens 346 is an optical lens that forms an image formed when the modulated light 303 modulated by the spatial light modulator 330 is projected at infinity at a focal position near the aperture 347.
  • the aperture 347 is a frame that shields the higher-order light contained in the light focused by the Fourier transform lens 346 and limits the outer edge of the display area.
  • the opening of the aperture 347 is opened smaller than the outer periphery of the display area at the position of the aperture 347, and is installed so as to block the peripheral area of the image at the position of the aperture 347.
  • the opening of the aperture 347 is formed in a rectangular or circular shape.
  • the aperture 347 is preferably installed at the focal position of the Fourier transform lens 346.
  • the aperture 347 may deviate from the focal position of the Fourier transform lens 346 as long as it can shield high-order light and limit the display area.
  • the projection lens 348 is an optical lens that magnifies the light focused by the Fourier transform lens 346.
  • the projection lens 348 magnifies the spatial light signal 305 so that an image corresponding to the phase image set in the modulation section of the spatial light modulator 330 is formed on the projected surface.
  • FIG. 15 is a block diagram showing an example of the configuration of the light transmission control unit 37.
  • the light transmission control unit 37 includes a light transmission condition storage unit 371, a light transmission condition setting unit 372, a modulator control unit 373, and a light source drive unit 374.
  • the light transmission condition storage unit 371 stores a pattern corresponding to the spatial optical signal 305.
  • the spatial light modulator 330 is a phase modulation type
  • the light transmission condition storage unit 371 stores a phase distribution corresponding to the spatial optical signal 305.
  • the light transmission condition storage unit 371 stores light transmission conditions including a light source control condition for controlling the light source 320 and a modulation element control condition for controlling the spatial light modulator 330.
  • the modulation element control condition is a control condition for setting a pattern corresponding to the spatial optical signal 305 in the modulation unit of the spatial optical modulator 330.
  • the light source control condition is a control condition for emitting the laser beam 301 from the light source 320.
  • the light transmission condition setting unit 372 sets the light transmission conditions for transmitting the spatial optical signal 305.
  • the light transmission condition setting unit 372 sets the modulation element control conditions in the modulator control unit 373.
  • the light transmission condition setting unit 372 sets the light source control condition in the light source drive unit 374.
  • the light transmission condition setting unit 372 matches the timing of setting the modulation element control condition in the modulator control unit 373 and the timing of setting the light source control condition in the light source drive unit 374. As a result, the modulation section of the spatial light modulator 330 in the state where the pattern corresponding to the spatial light signal 305 is displayed is irradiated with the parallel light 302 derived from the laser beam 301 emitted from the light source 320.
  • the light transmission condition setting unit 372 sets the light source control condition for continuously emitting the laser beam 301 in the light source drive unit 374. .. At this time, the light transmission condition setting unit 372 sets the modulation element control condition for transmitting the spatial optical signal 305 of the first projection pattern in the modulator control unit 373 in order to scan the communication device to be communicated. .. As a result, the spatial optical signal 305 of the first projection pattern for scanning the communication device to be communicated is transmitted from the light transmitting unit 35.
  • the light transmission condition setting unit 372 emits a spatial optical signal 305 corresponding to a signal transmitted to the communication device to be communicated.
  • the light source control condition is set in the light source driving unit 374.
  • the light transmission condition setting unit 372 controls the modulation element for transmitting the spatial optical signal 305 of the second projection pattern whose projection area is smaller than that of the first projection pattern toward the communication device to be communicated.
  • the conditions are set in the modulator control unit 373.
  • the spatial optical signal 305 of the second projection pattern for communicating with the communication device to be communicated is transmitted from the light transmitting unit 35.
  • the light transmission condition setting unit 372 is a modulation element for selectively transmitting the spatial light signal 305 toward the arrival direction of the spatial light signal 305 for a predetermined period from the timing when the spatial light signal 305 is received.
  • the control conditions are set in the spatial light modulator 330. By limiting the light transmission direction of the spatial optical signal 305, the output of the spatial optical signal 305 that transmits light toward the position of the communication device to be communicated can be set high.
  • the modulator control unit 373 receives the pattern corresponding to the spatial optical signal 305 and the modulation element control condition from the light transmission condition setting unit 372.
  • the modulator control unit 373 drives a driver (not shown) that changes the pattern set in the modulation unit of the spatial light modulator 330 according to the modulation element control conditions received from the light transmission condition setting unit 372. As a result, a pattern corresponding to the spatial optical signal 305 is set in the modulator of the spatial light modulator 330.
  • the light source drive unit 374 includes a pulse generator (not shown) and a drive circuit (not shown).
  • the pulse generator generates a pulse train corresponding to the signal to be transmitted according to the light source control condition received from the light transmission condition setting unit 372, and modulates the drive circuit. Further, when the communication device to be communicated is determined, the pulse generator generates a pulse train corresponding to the signal to be transmitted according to the communication content with the communication device, and modulates the drive circuit. For example, the content of communication with the communication device is input by an input device (not shown).
  • the drive circuit drives the emitter 321 in a state of being modulated according to the pulse train generated by the pulse generator.
  • the light source driving unit 374 drives the emitter 321 according to the pattern of the pulse train according to the light source control condition received from the light transmission condition setting unit 372, and emits the laser beam 301 from the emitter 321.
  • the parallel light 302 derived from the laser beam 301 is irradiated to the modulation section of the spatial light modulator 330 at the timing when the pattern is set in the modulation section of the spatial light modulator 330.
  • the parallel light 302 irradiated to the modulation section of the spatial light modulator 330 is modulated in the modulation section of the spatial light modulator 330.
  • the modulated light 303 modulated in the modulation section of the spatial light modulator 330 is transmitted as a spatial optical signal 305 corresponding to the pattern displayed in the modulation section of the spatial light modulator 330.
  • FIG. 16 is a conceptual diagram for explaining a communication method using the communication device 3 of the present embodiment.
  • the left side of the thick arrow in the center shows an example of communication between the communication device 3 and the plurality of communication devices 300 to be communicated during the scanning period.
  • the right side of the thick arrow in the center shows an example of communication between the communication device 3 and the plurality of communication devices 300 to be communicated during the communication period.
  • the communication device 3 transmits the spatial optical signal of the first projection pattern.
  • the communication device 3 receives the spatial optical signals from the communication devices 300 (T1 to T4) to be communicated, the communication device 3 specifies the direction of each of the communication devices 300 according to the arrival direction of the spatial optical signals.
  • each of the channels (ch1 to ch4) is assigned to the signal derived from the spatial optical signal from each of the communication devices 300 (T1 to T4). Move to the communication period.
  • the communication device 3 transmits the spatial optical signal of the second projection pattern, which has a smaller projection area than the first projection pattern, to the individual communication devices 300 (T1 to T4). Since the light transmission direction is narrowed down during the communication period, the energy of the spatial optical signal to be transmitted can be made larger than the scanning period.
  • the communication device 3 communicates with each of the plurality of communication devices 300 by processing signals derived from spatial optical signals from the individual communication devices 300 on channels assigned to the individual communication devices 300.
  • FIG. 17 is a conceptual diagram for explaining a communication method using the communication device 390 of the comparative example.
  • the left side of the thick arrow in the center shows an example of communication between the communication device 390 and the plurality of communication devices 395 to be communicated with each other during the scanning period.
  • the right side of the thick arrow in the center shows an example of communication between the communication device 390 and the plurality of communication devices 395 to be communicated with each other during the communication period.
  • the communication device 390 transmits a spatial optical signal while changing the light transmission direction. Therefore, the spatial optical signals from the communication devices 390 reach each of the plurality of communication devices 395 (C1 to C4) in order. Similarly, each of the plurality of communication devices 395 transmits a spatial optical signal while changing the light transmission direction.
  • the communication device 390 individually receives a spatial optical signal from each of the plurality of communication devices 395.
  • the communication device 390 sequentially identifies the position of each communication device 300 based on the spatial optical signals from each of the plurality of communication devices 395.
  • communication between the communication device 390 and each of the plurality of communication devices 395 (C1 to C4) is established, and the communication period shifts. As described above, in the method of the comparative example, communication is established in order with the individual communication devices 395 (C1 to C4), so that it takes longer to establish the communication as compared with the communication method of the present embodiment.
  • the communication device 390 sequentially transmits a spatial optical signal to each communication device 395 (C1 to C4).
  • the communication device 390 receives signals derived from spatial optical signals from the individual communication devices 395 (C1 to C4) in a time-division manner, and processes them in a single channel (ch1) to form a plurality of communication devices 300. Communicate with each other. Therefore, in the comparative example, it is necessary to configure a system having a very high transmission speed in order to obtain a communication speed comparable to that of the present embodiment.
  • the communication device of the present embodiment includes a light receiving unit, a light transmitting unit, and a light transmitting control unit.
  • the light receiving unit includes a sensor array, a lens, and a receiving unit.
  • the lens collects the spatial optical signal.
  • the sensor array includes a plurality of photoreceivers that receive the spatial optical signal focused by the lens.
  • the receiving unit integrates the electric signals derived from the spatial optical signals received by each of the plurality of light receivers, and selects a light receiver that receives the spatial optical signals according to the voltage value of the integrated electric signals.
  • the light transmitting unit transmits a second space optical signal according to the first space optical signal received by the light receiving unit.
  • the light transmission control unit controls the light transmission unit according to the first space optical signal received by the light receiving unit, and transmits the second space optical signal to the communication target of the transmission source of the first space optical signal to the light transmission unit. Send light.
  • the light transmission control unit transmits a second space optical signal to the light transmission unit in the first projection pattern during the scanning period for scanning at least one communication target.
  • the light transmission unit transmits the second space optical signal toward the communication target with a second projection pattern smaller than the first projection pattern.
  • the direction in which a plurality of spatial optical signals arrive can be instantly specified, so that communication with a communication target can be established at high speed. Further, according to the communication method of the present embodiment, since communication can be performed simultaneously with a plurality of communication targets, the transmission speed of the communication system can be set low.
  • the light receiving device of the present embodiment has a simplified configuration of the light receiving device of the first to second embodiments.
  • FIG. 18 is a conceptual diagram showing an example of the light receiving device 40 of the present embodiment.
  • the light receiving device 40 includes a sensor array 41, a lens 42, and a receiving unit 43.
  • the lens 42 collects the spatial optical signal.
  • the sensor array 41 includes a plurality of receivers 410 that receive the spatial optical signal collected by the lens 42.
  • the receiving unit 43 integrates the electric signals derived from the spatial optical signals received by each of the plurality of light receivers 410, and receives the spatial optical signals according to the voltage value of the integrated electric signals.
  • the light receiving device of the present embodiment receives the spatial optical signal collected by the lens with at least one of a plurality of light receivers.
  • the light receiving device of the present embodiment brings the voltage of the electric signal to a measurable level by integrating the electric signals derived from the spatial optical signals received by each of the plurality of light receivers. Then, the light receiving device of the present embodiment receives a spatial optical signal according to the voltage value of the integrated electric signal.
  • the light receiving device of the present embodiment it is possible to efficiently receive spatial optical signals coming from various directions.
  • the information processing apparatus 90 of FIG. 19 is a configuration example for executing the processing of the control system of each embodiment, and does not limit the scope of the present invention.
  • the information processing device 90 includes a processor 91, a main storage device 92, an auxiliary storage device 93, an input / output interface 95, and a communication interface 96.
  • the interface is abbreviated as I / F (Interface).
  • the processor 91, the main storage device 92, the auxiliary storage device 93, the input / output interface 95, and the communication interface 96 are connected to each other via the bus 98 so as to be capable of data communication. Further, the processor 91, the main storage device 92, the auxiliary storage device 93, and the input / output interface 95 are connected to a network such as the Internet or an intranet via the communication interface 96.
  • the processor 91 expands the program stored in the auxiliary storage device 93 or the like to the main storage device 92, and executes the expanded program.
  • the software program installed in the information processing apparatus 90 may be used.
  • the processor 91 executes the processing by the control system according to this embodiment.
  • the main storage device 92 has an area in which the program is expanded.
  • the main storage device 92 may be a volatile memory such as a DRAM (Dynamic Random Access Memory). Further, a non-volatile memory such as MRAM (Magnetoresistive Random Access Memory) may be configured / added as the main storage device 92.
  • DRAM Dynamic Random Access Memory
  • MRAM Magnetic Random Access Memory
  • the auxiliary storage device 93 stores various data.
  • the auxiliary storage device 93 is composed of a local disk such as a hard disk or a flash memory. It is also possible to store various data in the main storage device 92 and omit the auxiliary storage device 93.
  • the input / output interface 95 is an interface for connecting the information processing device 90 and peripheral devices.
  • the communication interface 96 is an interface for connecting to an external system or device through a network such as the Internet or an intranet based on a standard or a specification.
  • the input / output interface 95 and the communication interface 96 may be shared as an interface for connecting to an external device.
  • the information processing device 90 may be configured to connect an input device such as a keyboard, a mouse, or a touch panel, if necessary. These input devices are used to input information and settings. When the touch panel is used as an input device, the display screen of the display device may also serve as the interface of the input device. Data communication between the processor 91 and the input device may be mediated by the input / output interface 95.
  • the information processing apparatus 90 may be equipped with a display device for displaying information.
  • a display device it is preferable that the information processing device 90 is provided with a display control device (not shown) for controlling the display of the display device.
  • the display device may be connected to the information processing device 90 via the input / output interface 95.
  • the above is an example of the hardware configuration for enabling the processing by the control system according to each embodiment.
  • the hardware configuration of FIG. 19 is an example of a hardware configuration for executing processing by the control system according to each embodiment, and does not limit the scope of the present invention.
  • a program for causing a computer to execute a process by the control system according to each embodiment is also included in the scope of the present invention.
  • a recording medium on which a program according to each embodiment is recorded is also included in the scope of the present invention.
  • the recording medium can be realized by, for example, an optical recording medium such as a CD (Compact Disc) or a DVD (Digital Versatile Disc).
  • the recording medium may be realized by a semiconductor recording medium such as a USB (Universal Serial Bus) memory or an SD (Secure Digital) card, a magnetic recording medium such as a flexible disk, or another recording medium.
  • the components of the control system of each embodiment can be arbitrarily combined. Further, the components of the control system of each embodiment may be realized by software or by a circuit.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
PCT/JP2021/016471 2020-07-01 2021-04-23 受光装置および通信装置 Ceased WO2022004106A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE112021003531.2T DE112021003531T5 (de) 2020-07-01 2021-04-23 Lichtempfangsvorrichtung und Kommunikationsvorrichtung
CN202180046410.8A CN115735336A (zh) 2020-07-01 2021-04-23 受光装置和通信装置
US18/012,311 US12212370B2 (en) 2020-07-01 2021-04-23 Light receiving device and communication device
JP2022533701A JP7574850B2 (ja) 2020-07-01 2021-04-23 受光装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020113680 2020-07-01
JP2020-113680 2020-07-01

Publications (1)

Publication Number Publication Date
WO2022004106A1 true WO2022004106A1 (ja) 2022-01-06

Family

ID=79315714

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/016471 Ceased WO2022004106A1 (ja) 2020-07-01 2021-04-23 受光装置および通信装置

Country Status (5)

Country Link
US (1) US12212370B2 (https=)
JP (1) JP7574850B2 (https=)
CN (1) CN115735336A (https=)
DE (1) DE112021003531T5 (https=)
WO (1) WO2022004106A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003258736A (ja) * 2002-03-05 2003-09-12 Microsignal Kk 空間光通信用センサ、空間光通信用受信装置、及び該受信装置を含む空間光通信システム
WO2008023583A1 (en) * 2006-08-21 2008-02-28 Panasonic Corporation Optical space transmission device using image sensor
JP2016201790A (ja) * 2015-04-13 2016-12-01 ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ ギガビットイーサネットテレメトリデータの二方向自由空間レーザー通信システム

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6915080B2 (en) * 2000-09-20 2005-07-05 Mark David Heminger Method and apparatus for aligning optical wireless links
JP2002333407A (ja) 2001-05-09 2002-11-22 Horiba Ltd 平面表示装置の欠陥検査装置
TWI441512B (zh) * 2009-10-01 2014-06-11 新力股份有限公司 影像取得裝置及照相機系統
JP5990906B2 (ja) * 2011-12-19 2016-09-14 ソニー株式会社 測定装置、測定方法、プログラムおよび記録媒体
US9772404B2 (en) 2013-01-31 2017-09-26 Sharp Kabushiki Kaisha Optical sensor and electronic device
WO2019012532A1 (en) * 2017-07-11 2019-01-17 Supreme Architecture Ltd. SPATIAL OPTICAL WIRELESS COMMUNICATION SYSTEM
CN107563361B (zh) * 2017-09-30 2023-09-05 苏州迈瑞微电子有限公司 一种传感器像素及光学传感器
JP2019186595A (ja) 2018-04-02 2019-10-24 株式会社島津製作所 光通信装置の受光装置
JP6644921B1 (ja) 2019-01-15 2020-02-12 キヤノンマシナリー株式会社 半田平坦化装置、ダイボンダ、半田平坦化方法、及びボンディング方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003258736A (ja) * 2002-03-05 2003-09-12 Microsignal Kk 空間光通信用センサ、空間光通信用受信装置、及び該受信装置を含む空間光通信システム
WO2008023583A1 (en) * 2006-08-21 2008-02-28 Panasonic Corporation Optical space transmission device using image sensor
JP2016201790A (ja) * 2015-04-13 2016-12-01 ザ・ボーイング・カンパニーＴｈｅ Ｂｏｅｉｎｇ Ｃｏｍｐａｎｙ ギガビットイーサネットテレメトリデータの二方向自由空間レーザー通信システム

Also Published As

Publication number Publication date
CN115735336A (zh) 2023-03-03
JP7574850B2 (ja) 2024-10-29
DE112021003531T5 (de) 2023-04-20
US12212370B2 (en) 2025-01-28
US20230261760A1 (en) 2023-08-17
JPWO2022004106A1 (https=) 2022-01-06

Similar Documents

Publication Publication Date Title
US8878119B2 (en) Optical inspection method and optical inspection apparatus
US8605147B2 (en) Device for recording images of an object scene
US7605921B2 (en) Synchronous optical measurement and inspection method and means
JP2002148018A (ja) 音響等による微小変位検出装置
JP2021179447A (ja) 光学測定装置及び光学測定方法
KR102125483B1 (ko) 공초점 계측 장치
JP6923702B1 (ja) 光学測定装置及び光学測定方法
WO2022004106A1 (ja) 受光装置および通信装置
JP2018004512A (ja) 計測装置
US20250141548A1 (en) Communication control device, communication device, communication control method, and recording medium
JP7683704B2 (ja) 受信装置、通信装置、および通信システム
JP2005175919A (ja) 超音波受信センサ及び超音波受信装置
JP7582450B2 (ja) 受光装置、受信装置、および通信装置
JP7673815B2 (ja) 受信制御装置、受光装置、通信装置、受信制御方法、およびプログラム
US20250076595A1 (en) Light receiver, communication device, and communication system
US20240413904A1 (en) Reception device and communication device
CN220305493U (zh) 光电探测器测试系统、激光雷达
JP7567938B2 (ja) 受光装置および通信装置
WO2022201940A1 (ja) 受光装置、受信装置、および通信装置
WO2023047446A1 (ja) 受信装置および通信装置
JPH074909A (ja) レーザセンサ装置
CN118671739A (zh) 光电探测器测试系统及其测试方法、激光雷达
JPH0610327Y2 (ja) レ−ザ光のフアイバ入力装置
JP2025110011A (ja) 物体検出装置
JP2024003844A (ja) 受信器、受信装置、通信装置、および通信システム

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21833283

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2022533701

Country of ref document: JP

Kind code of ref document: A

122 Ep: pct application non-entry in european phase

Ref document number: 21833283

Country of ref document: EP

Kind code of ref document: A1