Abstract: A virtual image display device includes an image light generating device, an infrared light emitting device, an infrared light receiving device, a first light guide optical system, and a second light guide optical system, wherein infrared light emitted from the infrared light emitting device is deflected by a second incident-side diffraction element such that it enters a second light guide member and then deflected by a second emitting-side diffraction element such that it is emitted toward an eye position, and then infrared light from the eye position is caused to be incident on the second light guide member by the second emitting-side diffraction element and then caused to be emitted toward the infrared light receiving device by the second incident-side diffraction element, and the second light guide optical system is disposed closer to the eye position than the first light guide optical system is.

Abstract: An electronic pen includes a light source configured to emit irradiation light, a rotating body configured to rotate and to reflect the irradiation light emitted from the light source, a first detection member configured to receive the irradiation light reflected by the rotating body, and a first diffraction element provided at an optical path from the light source to the first detection member and configured to diffract the irradiation light.

Abstract: An IPU includes a battery that supplies power to a drive unit of a vehicle, a temperature sensor that detects temperature of the battery, a current sensor that detects electrical current of the battery, a voltage sensor that detects voltage of the battery, contactors that cut off the electrical current flow from the battery and the electrical current flow to the battery, and a battery ECU that, when a temperature detection function by the temperature sensor has been lost, calculates a value of the power of the battery based on a detection result of the electrical current and a detection result of the voltage, and operates the contactors when a calculated value of the power exceeds a predetermined value for a predetermined period of time to cut off the electrical current flow from the battery and the electrical current flow to the battery.

Abstract: A display device includes an image light generating device, a light-guiding member on which image light emitted from the image light generating device is incident, a first diffraction element provided at an incident side of the light-guiding member and having positive power, a second diffraction element provided at an exit side of the light-guiding member and having positive power, and a mirror provided at an end portion at the incident side of the light-guiding member and having positive power, in which the image light passed through the first diffraction element is reflected by the mirror and propagates in the light-guiding member, and the image light incident on the second diffraction element is deflected by the second diffraction element forming an exit pupil.

Abstract: A virtual image display device includes an image light generating device, an infrared light emitting device, an infrared light receiving device, a first light guide optical system, and a second light guide optical system. The first light guide optical system includes a first light guide member, a first incident-side diffraction element, and a first emitting-side diffraction element. The second light guide optical system includes a second light guide member, a second incident-side diffraction element, and a second emitting-side diffraction element. The maximum value of an angle formed between the infrared light that the second incident-side diffraction element deflects toward the infrared light receiving device and a normal line of the second incident-side diffraction element is greater than the maximum value of an angle formed between the image light incident on the first incident-side diffraction element and a normal line of the first incident-side diffraction element.

Abstract: The information processing device includes: a storage; and a controller that: stores, in the storage, participation status information indicating a user participation status in an event occurrence area, wherein the participation status information is associated with the event occurrence area that is set up at a location in a virtual game space corresponding to a location in a real space, determines whether the event occurrence area is in a crowded state based on the participation status information, after determining that the event occurrence area is in the crowded state, restricts participation to the event occurrence area in the virtual game space, and after determining that the event occurrence area is in the crowded state, sets up another event occurrence area in the virtual game space.

Abstract: A method of manufacturing an optical element including, a first step of, after affixing a hologram forming material to a glass substrate having a marking portion, performing interference exposure on the hologram forming material, thereby forming a hologram layer at the glass substrate, and a second step of affixing the hologram layer peeled off from the glass substrate to a plastic substrate having a first alignment mark, wherein in the second step, the first alignment mark on the plastic substrate, and a second alignment mark formed at a position corresponding to the marking portion in the hologram layer during the interference exposure are used to implement positioning of the plastic substrate and the hologram layer.

Abstract: An optical element includes a hologram layer, a resin substrate to which the hologram layer is adhered, and a holder portion that supports the resin substrate and has a thermal expansion coefficient smaller than that of the resin substrate. One of the holder portion and the resin substrate includes a contact surface along an axis extending in a plate thickness direction of the resin substrate, and the other of the holder portion and the resin substrate includes a pressing surface that presses the contact surface.

Abstract: An analysis device includes a controller configured to count a pulse derived from a particles as a plural particles when a light reception level signal includes the pulse having a first extreme value point, a second extreme value point, and a third extreme value point, and the pulse fulfils a condition in which the third extreme value point is present between the first extreme value point and the second extreme value point in a pulse width direction of the pulse, the third extreme value point is present between the first extreme value point and a threshold in a pulse amplitude direction, the first extreme value point and the second extreme value point are each an extreme value point of a waveform projecting in a common direction, and the third extreme value point is an extreme value point of a waveform in a direction opposite to the common direction.

Abstract: The display apparatus of the present disclosure includes an imaging light generating device and an optical system on which imaging light emitted from the imaging light generating device is incident. The optical system includes a first optical unit having positive power, a second optical unit having a positive power and including a first diffraction element, a third optical unit having positive power, and a fourth optical unit having positive power and including a second diffraction element forming an exit pupil, the first optical unit, the second optical unit, the third optical unit, and the fourth optical unit being aligned in order along an optical path of the imaging light. The second diffraction element is constituted of a volume hologram and has, in a cross-sectional view of the volume hologram, interference fringes continuously varying in pitch and inclination thereof from one end toward another end of the second diffraction element.

Abstract: A fishing rod according to one embodiment of the invention includes a small-diameter hollow rod body extending in a central axis direction, a large-diameter hollow rod body extending in the central axis direction, and a spigot ferrule inserted in the small-diameter rod body from its rear end and into the large-diameter rod body from its front end to connect the small-diameter rod body and the large-diameter rod body. In the fishing rod, a first inclined surface that extends from an rear end of the small-diameter rod body at an angle of 0.1° to 10.0° with respect to the central axis direction is formed on an inner peripheral surface of the small-diameter rod body.

Abstract: An optical element includes a substrate and a first hologram element provided on one side of the substrate, and a second hologram element provided on another side of the substrate. The first hologram element is provided to overlap with the second hologram element in a front view. The first hologram element includes a first hologram layer that diffracts part of incident light in a first wavelength band and that transmits another part of the incident light in the first wavelength band. The second hologram element includes a second hologram layer that diffracts, toward the first hologram layer through diffraction, part of light in the first wavelength band transmitted through the first hologram layer and that transmits other part of the light in the first wavelength band transmitted through the first hologram layer.

Abstract: An analysis unit for quantitating detection target substances bound to antibodies includes wells and inclination parts. The wells each have a hole-like shape defined by an opening, an inner circumferential surface, and a bottom. The inclination parts each have an inclined surface connected to the inner circumferential surface and inclined downward such that whose height with respect to the bottom decreases as a distance from an outer circumferential side of the well increases.

Abstract: A nanoparticle measurement device includes a timing signal generation unit, a low-frequency component extraction unit, a low-frequency component calculation unit, a threshold correction unit, and a measurement unit. The timing signal generation unit generates timing signals. The low-frequency component extraction unit extracts low-frequency components according to the timing signals. The low-frequency component calculation unit calculates an interpolated low-frequency component in accordance with the low-frequency components. The threshold correction unit sets a corrected threshold in accordance with the interpolated low-frequency component. The measurement unit extracts and counts nanoparticle pulse signals from a light reception signal according to the timing signals and the corrected threshold.

Abstract: To provide an impact absorbing member that can be arranged flexibly in accordance with the shape of the space where the impact absorbing member is to be arranged. An impact absorbing member according to an exemplary aspect has a plurality of structural members each having hollow tetrahedron structures arranged continuously at prescribed intervals on an axis. Further, an impact absorbing member according to another exemplary aspect has a plurality of structural members woven by a connecting member that is disposed in a direction orthogonal to an axial direction of the structural members.

Abstract: A diffractive optical member includes: a hologram element, a substrate that supports the hologram element, a dielectric film that is provided between the hologram element and the substrate, a buffer layer that is formed around the hologram element so as to buffer a stress applied to the hologram element from outside of the hologram element, and an adhesive layer that makes the buffer layer and the dielectric film adhere to each other.

Abstract: A deflection optical element, which diffracts incident light, includes a substrate having translucency, and a holographic material layer disposed so as to overlap the substrate, the holographic material layer being formed with a diffraction grating composed of interference fringes, wherein the holographic material layer is formed with an alignment mark where the interference fringes are discontinuous, and the alignment mark is located in an optically effective area where the holographic material layer diffracts the incident light.

Abstract: A virtual image display device includes an imaging light generation device that generates an imaging light, a first reflection type diffraction element that diffracts the imaging light from the imaging light generation device, a second reflection type diffraction element diffracts the imaging light from the first reflection type diffraction element so that the imaging light reflected by the first reflection type diffraction element is compensated for wavelength distribution, and a concave transmission mirror that has a concave shape and includes a partial reflection film reflecting a part of the imaging light and transmitting other part of the imaging light, In the second reflection type diffraction element diffracts the imaging light toward the mirror and transmits the part of the imaging light reflected by the mirror.

Abstract: A virtual image display device includes an imaging light generation device generating an imaging light, a transmission inclined mirror configured to reflect the imaging light, and a concave transmission mirror including: a partial reflection film reflecting the imaging light reflected transmission inclined mirror, and a reflection type diffraction layer being disposed on opposite to the reflection film. In the reflection type diffraction layer diffracts the imaging light in a direction that is different from a direction in which the reflection film reflects the imaging light.

Abstract: A virtual image display device includes an imaging light generation device, and an optical unit including a concave transmission mirror provided with a partial reflection film, the optical unit being configured to form a virtual image with the imaging light emitted from the imaging light generation device, wherein the optical unit includes a reflection type diffraction element disposed on an external side of the partial reflection film, the reflection type diffraction element being configured to diffract the imaging light so that the imaging light is deviated from an optical path passing through the concave transmission mirror.