Abstract: A simulation system includes a processor including hardware. The processor performs a moving body process of performing a process of moving a moving body corresponding to a user wearing an HMD in a virtual space, a virtual camera control process of controlling a virtual camera moving in accordance with a movement of the moving body, and a display process of generating an image as viewed from the virtual camera in the virtual space as a display image of the HMD. In the display process, the processor performs a display process of changing, when a change in acceleration of the moving body or a change in a line-of-sight direction of the virtual camera is determined to have satisfied a given change condition, the display image on the HMD to an image different from the image as viewed from the virtual camera.

Abstract: A radiation imaging apparatus comprising a pixel array in which a plurality of pixels are arrayed and a processor configured to generate a radiation image based on radio-photons which have entered the pixel array, wherein the processor performs a first process of obtaining a value of a signal from each of the plurality of pixels as a pixel value, a second process of selecting at least one of the plurality of pixels as a reference pixel, and a third process of specifying a detection area of a radio-photon in the pixel array by sequentially referring to pixel values of pixels around the reference pixel as a starting point.

Abstract: A radiation imaging apparatus is provided. The apparatus comprises a scintillator configured to convert radiation into light, a sensor panel in which a plurality of pixels each comprising a light detector configured to detect the light is arranged in a two-dimensional array, and a processing unit. The processing unit comprises a signal generating unit configured to output signals indicating intensities of the light detected by the light detector of each of the plurality of pixels, and a detection unit configured to identify a group of pixels each of which outputs a signal of a level exceeding a reference value out of the signals and detect, based on a pattern of the group, pileup in which a plurality of radiation photons is detected as a single radiation photon.

Abstract: The present invention provides an imaging device in which focus movement due to a temperature variation is suppressed and the infiltration of foreign matter such as liquid or dust is prevented. An imaging device 10 is provided with an imaging lens 11, an imaging element 12, and an intermediate member 15. The imaging lens 11 is held by a lens-barrel 13 and forms an image of a photographic subject. The imaging element 12 captures the image of the photographic subject which is formed by the imaging lens 11. The intermediate member 15 has, on the inner-peripheral-surface of one end thereof, a flange portion 15a which comes into contact with the lens-barrel 13, and holds the lens-barrel 13 by joining the front surface 26 of a flange portion 13b of the lens-barrel 13 and the surface 27 on the imaging element 12 side of the flange portion 15a to each other.

Abstract: In order to provide a large-area radiation imaging apparatus that has an energy resolution while suppressing the occurrence of an artifact, the radiation imaging apparatus includes a detector and a signal processing unit. The detector includes a plurality of pixels for acquiring a pixel value in accordance with incident radiation. The signal processing unit performs signal processing for estimating energy of a radiation quantum of the incident radiation at a predetermined pixel included in the pixels using the amount of change in the pixel value of the predetermined pixel.

Abstract: A radiation imaging apparatus includes a pixel array in which a plurality of pixels are arrayed and a processing unit configured to process pixel signals non-destructively read out from the respective pixels. The processing unit performs a first process of obtaining image data of a plurality of frames by repeatedly reading out image data while the pixel array is irradiated with radiation, with a group of pixel signals from the plurality of pixels corresponding to image data of one frame, and a second process of generating data for a radiation image based on data differences between the image data of the plurality of frames.

Abstract: A radiographic imaging apparatus is provided. The apparatus comprises a sensor panel in which pixels are provided and a processor that generates an image that corresponds to the number of radiation photons incident on each of the pixels. In an imaging mode in which an image formed by radiation that has passed through a subject is generated, the processor generates a correction signal by correcting a value of a signal output from the conversion element of each of the pixels according to a correction coefficient for converting the value of the signal output from the conversion element on which a radiation photon was incident to a value that corresponds to an energy value of the radiation photon, and generates an image based on the number of correction signals of pixels on which a radiation photon was incident from among the correction signals of the pixels.

Abstract: An energy resolution decrease in a radiation imaging apparatus is suppressed. The apparatus includes a detector including a conversion unit configured to convert incident radiation photons into optical photons or charges, a pixel array including pixels arranged in a two-dimensional matrix and configured to obtain a pixel value in accordance with the optical photons or charges, and an output circuit including a plurality of output channels configured to output the pixel value from the pixel array, and a signal processing unit configured to perform signal processing of correcting the pixel value by using a correction coefficient in accordance with a pixel value obtaining process model in which a process of obtaining the pixel value output from the pixel array via the plurality of output channels on the basis of the optical photons or charges is modeled and obtaining an energy-discriminated radiographic image based on the corrected pixel value.

Abstract: A radiation imaging apparatus comprising a pixel array in which a plurality of pixels are arrayed and a processor configured to generate a radiation image based on radio-photons which have entered the pixel array, wherein the processor performs a first process of obtaining a value of a signal from each of the plurality of pixels as a pixel value, a second process of selecting at least one of the plurality of pixels as a reference pixel, and a third process of specifying a detection area of a radio-photon in the pixel array by sequentially referring to pixel values of pixels around the reference pixel as a starting point.

Abstract: A radiation imaging apparatus is provided. The apparatus comprises a scintillator configured convert radiation into light, a sensor panel in which a plurality of pixels each comprising a light detector configured to detect the light is arranged in a two-dimensional array, and a processing unit. The processing unit comprises a signal generating unit configured to output signals indicating intensities of the light detected by the light detector of each of the plurality of pixels, and a detection unit configured to identify a group of pixels each of which outputs a signal of a level exceeding a reference value out of the signals and detect, based on a pattern of the group, pileup in which a plurality of radiation photons is detected as a single radiation photon.

Abstract: A radiation imaging apparatus that obtains a radiation image by an energy subtraction method. Each pixel includes a conversion element that converts radiation into an electrical signal and a reset portion that resets the conversion element. Each pixel performs an operation of outputting a first signal corresponding to an electrical signal generated by the conversion element in a first period, and an operation of outputting a second signal corresponding to an electrical signal generated by the conversion element in the first period and a second period. Radiation having first energy is emitted in the first period, and radiation having second energy is emitted in the second period. In each pixel, the reset portion does not reset the conversion element during a period that includes the first period and the second period.

Abstract: A control unit controls a detector including a pixel array arranged in a matrix, a driving circuit that drives the pixel array by a changeable number of pixels, and a readout circuit that outputs an electrical signal from the pixel array. The control unit controls, with a change from a first image capturing operation for repeating a set of a first accumulation operation and a first image output operation a plurality of times at a first frame rate to a second image capturing operation for repeating a set of a second accumulation operation and a second image output operation a plurality of times at a second frame rate, so that the detector continuously repeats a set of the second accumulation operation and an initialization operation a plurality of times at the second frame rate in a period between the first image capturing operation and the second image capturing operation.

Abstract: A semiconductor device that includes a first wiring, a second wiring, and a first number of first resistance elements that are connected in parallel between the first wiring and the second wiring, and each of which has a negative first temperature coefficient. The semiconductor device further includes a second number of second resistance elements that are connected in parallel to the first resistance elements, each of which has a positive second temperature coefficient, the second temperature coefficient having an absolute value larger than an absolute value of the first temperature coefficient. The second number is smaller than the first number.

Abstract: A semiconductor device that includes a first wiring, a second wiring, and a first number of first resistance elements that are connected in parallel between the first wiring and the second wiring, and each of which has a negative first temperature coefficient. The semiconductor device further includes a second number of second resistance elements that are connected in parallel to the first resistance elements, each of which has a positive second temperature coefficient, the second temperature coefficient having an absolute value larger than an absolute value of the first temperature coefficient. The second number is smaller than the first number.

Abstract: An imaging lens is constituted by six lenses, including, in order from the object side to the image side: a positive first lens having a convex surface toward the object side; a negative second lens; a positive third lens, which is a meniscus lens having a convex surface toward the object side; a positive fourth lens; a negative fifth lens having a concave surface toward the object side; and a negative sixth lens, of which the image toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Conditional formulae related to the focal length f of the entire lens system, the focal length f1 of the first lens, and the focal length f4 of the fourth lens is satisfied.

Abstract: An imaging lens substantially consists of five lenses consisting of, in order from the object side: a first lens having a positive refractive power with a convex surface toward the object side; a second lens having a negative refractive power and having a meniscus shape with a convex surface toward the image side; a third lens having a positive refractive power and having a meniscus shape with a convex surface toward the image side; a fourth lens having a positive refractive power and having a meniscus shape with a convex surface toward the image side; and a fifth lens having a negative refractive power, wherein an image-side surface of the fifth lens includes a concave surface and at least one inflection point, wherein a predetermined conditional expression is satisfied.

Abstract: The imaging lens substantially consists of a first lens having a biconvex shape, a second lens having a negative refractive power, a third lens having a negative refractive power and a convex surface that faces the object side, a fourth lens having a positive refractive power, and a fifth lens having a negative refractive power, of which at least one of the object-side surface and the image-side surface has at least one inflection point, in this order from the object side; and wherein conditional expression (1A): ?0.38<f/f45<?0.01 is satisfied. This conditional expression is related to the focal length f of the entire system and the combined focal length f45 of the fourth lens and the fifth lens.

Abstract: An imaging lens is constituted essentially by six lenses, including, in order from the object side to the image side: a first lens having a positive refractive power and a convex surface toward the object side; a second lens having a negative refractive power; a third lens having a positive refractive power and is of a biconvex shape; a fourth lens having a positive refractive power; a fifth lens having a negative refractive power and a concave surface toward the object side; and a sixth lens having a negative refractive power, of which the surface toward the image side is of an aspherical shape which is concave in the vicinity of the optical axis and convex at the peripheral portion thereof. Predetermined conditional formulae are satisfied.

Abstract: An imaging lens provided with a negative first lens group and a positive second lens group disposed in order from the object side. The first lens group is composed of a first group first lens which is a biconcave negative single lens, and the second lens group is composed of a positive second group first lens, an aperture stop, a positive second group second lens, and a negative second group third lens disposed in order from the object side. The second group second lens and second group third lens are cemented to form a cemented lens. The imaging lens is configured to satisfy conditional expressions (2): 0<fg2/f<1.3, (2b?): 0.5<fg2/f<1.25, and (6): 31<?d2 <70 at the same time, where fg2 is combined focal length of the second lens group, f is focal length of the entire lens system, and ?d2 is Abbe number of the second group first lens.

Abstract: Provided are a zoom lens apparatus as well as a method of controlling the apparatus for alleviating astigmatism. A lens is moved along the direction of the optical axis of the zoom lens apparatus in accordance with zoom magnification. The angle of rotation of a ring that rotates about the optical axis of the zoom lens apparatus is read from a table stored in advance. The ring is rotated through the read angle of rotation. A lens holding frame holding the lens has a surface is contact with the ring, and the surface has protrusions and cavities so that when the ring is rotated, the lens holding frame is tilted and so is the lens. The tilt angle is decided in such a manner that astigmatism is reduced in accordance with zoom magnification. Astigmatism is reduced even though the lens is moved in accordance with zoom magnification.