Abstract: A driver condition estimation device includes an estimation unit configured to trigger an event that a webbing of a seat belt device is retracted, and to estimate a condition of a driver based on an amount of retraction of the webbing in the event.

Abstract: A biometric apparatus includes a light source, an image sensor, a control circuit, and a signal processing circuit. The control circuit causes a light source to repeatedly emit a light pulse radiated onto a target part including a head of a target, causes an image sensor to receive a reflected light pulse which is caused as the light pulse is radiated onto the target part, causes the image sensor to output first image data indicating appearance of a face of the target, and causes the image sensor to output second image data according to distribution of an amount of light of at least one of components of the reflected light pulse. The signal processing circuit generates data indicating a state of the target based on a temporal change in the first image data and a temporal change in the second image data and outputs the data.

Abstract: An optical measuring device includes a light source, a photodetector, a control circuit, and a signal processing circuit. The control circuit causes the light source to emit first and second light pulses with which a target of measurement is irradiated, causes the photodetector to detect a first portion of a first reflected light pulse in a first period having a first time length and output a first signal representing an amount of light of the first portion, and causes the photodetector to detect a second portion of a second reflected light pulse in a second period having a second time length and output a second signal representing an amount of light of the second portion. The signal processing circuit generates, based on a fluctuation in the first signal and a fluctuation in the second signal, information indicating a fluctuation in internal state of the target of measurement.

Abstract: A photo-detection system includes: a photo-detection apparatus including a light-shielding film, an optically-coupled layer, and a photodetector including first and second photo-detection cells; and an arithmetic circuit that generates, based on first signals and second signals, third signals each representing coherence of light having entered a position of each of the first and second photo-detection cells and generates at least one selected from the group consisting of an average value of the third signals, a standard deviation of the third signals, a ratio between the standard deviation and the average value, and a ratio between an average value of a first portion of the third signals based on light having entered the positions of the first photo-detection cells and an average value of a second portion of the third signals based on light having entered the positions of the second photo-detection cells.

Abstract: A luminance control device includes a measurement unit configured to measure a pupil diameter of a driver based on an image in which a driver's face is imaged, a luminance estimation unit configured to estimate luminance of light incident on a pupil of the driver based on the image, a pupil diameter estimation unit configured to estimate a pupil diameter with respect to the luminance estimated, a pupil diameter difference calculation unit configured to calculate a pupil diameter difference between the measured pupil diameter and the estimated pupil diameter, and a controller configured to output control information for controlling a control subject so that luminance is increased in at least one display region in which an image of surroundings of a vehicle taken by at least one image device is displayed, when it is determined that a dim portion is being focused on, based on the pupil diameter difference.

Abstract: A biometric measurement apparatus includes a light source that emits light onto a head portion of a user, an image sensor, a controller that controls the light source and the image sensor, and a signal processor. The controller causes the light source to emit the light and causes the image sensor to output an image signal by causing the image sensor to detect at least part of reflected light returning from the head portion in response to emission of the light. The signal processor generates brain activity data indicating a state of a brain of the user and stops outputting the brain activity data based on at least one selected from the group consisting of the image signal and a sensor signal output from a sensor that detects a change, affecting the brain activity data, in an environment surrounding the user.

Abstract: An operation status detection device is provided that detects if a vehicle operator is able to properly manually operate an automotive steering wheel when a driving assist device is on, and if not, maintains the “on” state of the driving assist device. The detection device includes a request part that requests that the vehicle operator grip the steering wheel at a designated position to perform an operation task that may be performed manually. The device further includes both a detection part having sensors that detect whether the vehicle operator is properly gripping the steering wheel, and a determination part that determines if the vehicle operator is able to operate the steering wheel based on whether completion of the operation task is detected by the detection part within a predetermined time after the request part requests the operation task.

Abstract: A structural body includes a first dielectric layer and a second dielectric layer which is in contact with the first dielectric layer and which has a refractive index different from that of the first dielectric layer. The second dielectric layer includes at least two dielectric films different in hydrogen concentration from each other. The interface between the first dielectric layer and the second dielectric layer has periodic first irregularities.

Abstract: A measurement apparatus includes a light source, an imaging device, a signal processing circuit, and a controller. The controller causes the light source to irradiate a first portion of the scatterer, causes the element to obtain an image signal from a first target area, causes the light source to irradiate a second portion of the scatterer, and causes the element to obtain an image signal from a second target area. The circuit uses the image signals to generate data regarding the position of a target object inside the scatterer. A first distance between the first portion and a center of the first target area is equal to a second distance between the second portion and a center of the second target area, or a difference between the first and second distances is smaller than 10% of a smaller one of the first and second distances.

Abstract: A device for detecting a state of a vehicle operator includes a first vibration detection unit installed on a vehicle side and configured to detect vibration, a second vibration detection unit installed on a steering part of the vehicle and configured to detect vibration, and a controller configured to process and compute input signals from the first vibration detection unit and the second vibration detection unit. The controller determines a gripping state of the steering part based on a difference between the respective input signals of the first vibration detection unit and the second vibration detection unit.

Abstract: A photo-detection apparatus includes a light-shielding film, an optically-coupled layer, a photodetector, and an optical system. In the light-shielding film, light-transmitting regions and light-shielding regions are alternately arranged in at least a first direction within a plane. The optically-coupled layer faces the light-shielding film and includes a grating that propagates light in the first direction. The photodetector includes first photo-detection cells and second photo-detection cells arranged on an imaging area. The optical system is disposed between the optically-coupled layer and the photodetector. An image of light transmitted by parts of the optically-coupled layer that face each of the light-transmitting regions and light-shielding regions is enlarged or reduced by the optical system and formed on a corresponding one of the first and second photo-detection cells.

Abstract: A driver condition estimation device includes an estimation unit configured to trigger an event that a webbing of a seat belt device is retracted, and to estimate a condition of a driver based on an amount of retraction of the webbing in the event.

Abstract: There is provided a vehicle cabin interior lighting device including: a light source that emits light; a polarizing member that converts the emitted light into p-polarized light; and a projection portion that is provided at an upper portion of an instrument panel, and onto which the p-polarized light is projected, and that reflects the projected p-polarized light without changing its polarization characteristics, and that causes the projected p-polarized light to be incident on a front windshield glass at Brewster's angle.

Abstract: An imaging apparatus includes an image sensor, an optical system, a control circuit, and a signal processing circuit. The image sensor includes a light-shielding film in which light-transmitting regions and light-shielding regions are alternately arranged in at least a first direction within a plane, a photodetector disposed opposite the light-shielding film, and an optically-coupled layer disposed between the light-shielding film and the photodetector. The optically-coupled layer includes a grating which generates a propagating light that propagates in the first direction and a transmitting light that transmits the optically-coupled layer when light of a predetermined wavelength enters the light-transmitting regions. The signal processing circuit extracts two different frames from frames included in a moving image acquired by the image sensor.

Abstract: A luminance control device (1) calculates a pupil diameter difference, which is the difference between a pupil diameter (R) measured by a measurement unit (11) and a pupil diameter (r) estimated by a pupil diameter estimation unit (13), and when it is determined, on the basis of the pupil diameter difference, that a dark portion is being focused on, the luminance control device (1) executes a luminance control method for outputting control information for controlling a control subject so that the luminance is increased in at least one display region in which an image is displayed of the surroundings of a vehicle (8) imaged by at least one imaging device.

Abstract: There is provided a vehicle cabin interior lighting device including: a light source that emits light; a polarizing member that converts the emitted light into p-polarized light; and a projection portion that is provided at an upper portion of an instrument panel, and onto which the p-polarized light is projected, and that reflects the projected p-polarized light without changing its polarization characteristics, and that causes the projected p-polarized light to be incident on a front windshield glass at Brewster's angle.

Abstract: A photodetection device including an image sensor that includes first pixels and second pixels; an interference element that includes incident regions; and illumination that emits light in a first wavelength band and a second wavelength band. The interference element causes first interference of light in the first wavelength band incident on two incident regions, and guides resultant light of the first interference to any of the first pixels and guides another part of the light in the first wavelength band to any of the second pixels, and causes second interference of part of the light in the second wavelength band incident on the two incident regions, and guides resultant light of the second interference to any of the first pixels and guides another part of the light in the second wavelength band incident on the two incident regions to any of the second pixels.

Abstract: The display device for a vehicle has a display portion that is provided at a ceiling of a vehicle cabin interior, and a control device that, in a case in which a vehicle is traveling within a legal speed limit, carries out display control that displays, on the display portion, moving images that are based on the vehicle speed and a peripheral environment of the vehicle.

Abstract: A photodetection device including an image sensor that includes fifth pixels and sixth pixels; an interference element that includes fifth incident regions; and illumination that emits light in a first wavelength band and a second wavelength band. The interference element causes first interference of light in the first wavelength band incident on two fifth incident regions, and guides resultant light of the first interference to any of the fifth pixels and guides another part of the light in the first wavelength band to any of the sixth pixels, and causes second interference of part of the light in the second wavelength band incident on the two fifth incident regions, and guides resultant light of the second interference to any of the fifth pixels and guides another part of the light in the second wavelength band incident on the two fifth incident regions to any of the sixth pixels.

Abstract: A light detection device includes a light detector including a first detector and a second detector; a light coupling layer disposed on or above the light detector; and a polarizer array that is disposed on the light coupling layer. The light coupling layer includes a first low-refractive-index layer, a first high-refractive-index layer including a first grating and a second grating adjacent to the first grating, and a second low-refractive-index layer in this order. The polarizer array includes a first polarizer that transmits light polarized in one direction and a second polarizer that is adjacent to the first polarizer and blocks the light polarized in the one direction. The first grating and the first polarizer face the first detector, and the second grating and the second polarizer face the second detector.