Abstract: A display system includes an optical element through which light diverges and an imaging optical system configured to form an image by projecting diverging light diverging through the optical element. In the display system, the image formed by the imaging optical system is visually recognized by a viewer, and a condition in an equation tan 0?(T×B)/(S×O) is satisfied, where ? denotes a divergence angle of the optical element, T denotes distance between the image forming optical system and the formed image, B denotes a range of an eye box that is an area through which the formed image can visually be recognized, S denotes distance between the formed image and a viewpoint of the viewer of the formed image, and O denotes distance between the optical element and the image forming optical system. In the above equation, each distance indicates length of an optical path that passes through a center of an image formed by the light when an object is observed from a reference eyepoint.

Abstract: An image projection device that projects an image formed on an image forming member 15 by a projection optical system 511, in which an image light emitting surface of the image forming member is disposed to be inclined with respect to an optical axis L0 of image light so that when external light L? incident on the projection optical system is incident on the image light emitting surface of the image forming member, a flux of light traveling along an optical axis of the external light reflected on the image light emitting surface is turned aside from a viewpoint area 402a of a user.

Abstract: A display system, a mobile object, and an optical element. The display system includes an optical device through which light diverges, a light deflector configured to scan a light emitted from a light source in a main scanning direction and a sub-scanning direction orthogonal to the main scanning direction to form an intermediate image on the optical device, and an imaging optical system configured to project diverging light diverging through the optical device to form an image. An effective diameter a of a mirror of the light deflector for the intermediate image and a ratio c of a size of an image formed by the imaging optical system to the effective diameter a satisfy a condition in an equation given below. 2?0.007a?2c2+0.75a?0.75c+0.5a?0.5 The mobile object includes the display system, and the reflector is a front windshield. The optical element is used for the display system.

Abstract: A display system includes an optical element through which light diverges and an imaging optical system configured to form an image by projecting diverging light diverging through the optical element. In the display system, the image formed by the imaging optical system is visually recognized by a viewer, and a condition in an equation tan 0?(T×B)/(S×O) is satisfied, where ? denotes a divergence angle of the optical element, T denotes distance between the image forming optical system and the formed image, B denotes a range of an eye box that is an area through which the formed image can visually be recognized, S denotes distance between the formed image and a viewpoint of the viewer of the formed image, and O denotes distance between the optical element and the image forming optical system. In the above equation, each distance indicates length of an optical path that passes through a center of an image formed by the light when an object is observed from a reference eyepoint.

Abstract: A display system, a mobile object, and an optical element. The display system includes an optical device through which light diverges, a light deflector configured to scan a light emitted from a light source in a main scanning direction and a sub-scanning direction orthogonal to the main scanning direction to form an intermediate image on the optical device, and an imaging optical system configured to project diverging light diverging through the optical device to form an image. An effective diameter a of a mirror of the light deflector for the intermediate image and a ratio c of a size of an image formed by the imaging optical system to the effective diameter a satisfy a condition in an equation given below. 2?0.007a?2c2+0.75a?0.75c+0.5a?0.5 The mobile object includes the display system, and the reflector is a front windshield. The optical element is used for the display system.

Abstract: A display device, a display system, and a mobile object. The display device includes a light source configured to emit light, a light deflector to deflect the light incident on the light deflector in a main scanning direction and a sub-scanning direction, a divergence optical system to diverge the light deflected by the light deflector to form a virtual image to be visually recognized by an observer, and a dioptric system disposed on an optical path between the light deflector and the divergence optical system to refract the light deflected by the light deflector to be made incident on the divergence optical system. In the display device, the dioptric system has a refractive power different in the main scanning direction than in the sub-scanning direction. The display system includes the display device, an imaging optical system, and a reflector. The mobile object includes the display system.

Abstract: An image projection apparatus includes an intermediate image forming member configured to form an intermediate image from light emitted by a light source device; and a plural-film optical member on which image light that forms the intermediate image is incident. The image projection apparatus uses the image light that is incident on the plural-film optical member to project an image, an image rotational position relationship in a rotational direction around an image center axis between the image that is projected and the intermediate image is such that a difference is present in image rotational positions, and the plural-film optical member is set in such a manner that a polarization axis of the image light incident on the plural-film optical member is parallel or perpendicular to a plane of incidence of the image light with respect to the plural-film optical member.

Abstract: An optical scanner, an image projection apparatus, a mobile object, and a method of manufacturing the optical scanner. The optical scanner includes a light source to emit light, a light deflector to deflect the light emitted from the light source, and a planar light transmission member disposed in an optical path between the light source and the light deflector. The planar light transmission member is inclined with reference to an optical-axis direction of the optical path to reduce an astigmatic difference caused to the light deflected by the light deflector due to astigmatism. An image projection apparatus includes the optical scanner and a projection optical system to project light emitted from the optical scanner to a target scanning area. In the image projection apparatus, the light deflector of the optical scanner scans the target scanning area, using light modulated based on image data, to project an image.

Abstract: An image projection apparatus includes an intermediate image forming member configured to form an intermediate image from light emitted by a light source device; and a plural-film optical member on which image light that forms the intermediate image is incident. The image projection apparatus uses the image light that is incident on the plural-film optical member to project an image, an image rotational position relationship in a rotational direction around an image center axis between the image that is projected and the intermediate image is such that a difference is present in image rotational positions, and the plural-film optical member is set in such a manner that a polarization axis of the image light incident on the plural-film optical member is parallel or perpendicular to a plane of incidence of the image light with respect to the plural-film optical member.

Abstract: A storage control apparatus is provided that includes a storage unit and a control unit. The storage unit is configured to store management information indicating a formatting status of each of a plurality of partitions included in a storage area. The control unit is configured to perform a procedure including: upon receiving a write request to write first data to the storage area, determining whether a partition including a region to which the first data is to be written is formatted, based on the management information; and when the partition is unformatted, generating third data with a size that matches a size of the partition by combining the first data and predetermined second data, and writing the third data to the partition.