Abstract: A training device includes a data acquirer that acquires training data including a first image of a first type and a second image of a second type that is different from the first type, a first trainer that repeats an epoch for causing the first image and the second image to be learned under a same condition multiple times, and a second trainer that repeats an epoch for training a trained learning model generated by the first trainer with a rate of error back-propagation in regard to the first image and a rate of error back-propagation in regard to the second image being made different from each other.

Abstract: An HMD includes a first display element, a holder configured to hold the first display element, a first projection optical system configured to project an image formed on the first display element, a case including an insertion opening into which the first display element supported by the holder is inserted and configured to house the first projection optical system in a positioned state, and a first metallic frame configured to support the case, wherein the first metallic frame includes a receiving opening larger than an outline of the holder when viewed from an insertion direction of the first display element.

Abstract: An HMD includes a first display element, a holder configured to hold the first display element, a first projection optical system configured to project an image formed on the first display element, and a barrel which is a case configured to house the first projection optical system in a positioned state, the holder includes a support frame that supports the first display element and a base plate coupled to an upper portion of the support frame and extending in a direction intersecting the support frame, and an end portion of the support frame is inserted into the barrel through an insertion opening formed at the barrel, and the base plate is fixed to the barrel while covering the insertion opening.

Abstract: An HMD includes a first display element, a holder configured to hold the first display element, a first projection optical system configured to project an image formed on the first display element, a barrel which is a case configured to house the first projection optical system in a positioned state, and a dust-proof structure configured to achieve fixing of the holder and the barrel while ensuring dust-proofing of the holder and the barrel, wherein the holder includes a support frame inserted into the barrel through an insertion opening formed at the barrel while supporting the first display element, and a base plate coupled to a root of the support frame, the barrel includes a pedestal facing the base plate, and the dust-proof structure includes an adhesive material extending along a periphery of the base plate and protruding to the pedestal.

Abstract: A virtual image display device includes a first acquisition unit configured to acquire a first image from an information terminal, a second acquisition unit configured to acquire a second image different from the first image, a correction unit configured to distort the first image, a generation unit configured to generate a third image or a fourth image including the distorted first image and the second image, and a display element configured to display the third image or the fourth image.

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 unit and a virtual image display device, that is, an HMD include a plurality of optical members, and the plurality of optical members have, at non-coupling portion, measurement reference members that serve as references for arrangement, respectively, and the plurality of measurement reference members of the plurality of optical members are arranged in a unified direction.

Abstract: An optical member includes a plurality of optically effective surfaces, and a plurality of measurement reference members that are associated with the plurality of optically effective surfaces and each of which serves as a reference for positioning of the plurality of optically effective surfaces. In this case, a relative positional relationship of the optically effective surfaces can be determined, and the optical performance of the optical member can be accurately evaluated.

Abstract: A transmissive image display device includes an image generation part configured to emit a light, and a light-guiding optical system configured to guide the light. The light-guiding optical system includes a first deflection part configured to deflect the light, and a second deflection part configured to further deflect the light deflected by the first deflection part to guide the light to a position of the exit pupil while transmitting a portion of external light, a first external light transmittance adjustment part is provided outside an optical path of the light between the first deflection part and the second deflection part, and an average external light transmittance of the first external light transmittance adjustment part is higher than one of an average external light transmittance of the first deflection part and an average external light transmittance of the second deflection part lower than the other.

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: In a display device, an image having an aspect not equal to 1 is formed by an image forming unit configured to form an image, and the image is guided as an image light to a display position by an optical system. The optical system, which is provided with a diffraction optical element, deflects the image light. In the diffraction optical element, a pitch direction of a pattern for deflecting the image light coincides with a direction in which the aspect of the image is narrow. In the display device, the direction in which the image light is deflected by the diffraction optical element coincides with the direction in which the aspect of the image formed is narrow, thus making it possible to suppress unevenness of brightness and hue within a plane of an image displayed.

Abstract: An image in a predetermined hue is displayed at a display surface, and is emitted as image light. The image light is guided to a display position by an optical system, and is deflected by a diffraction optical element. The emitted image light includes light emitted from a first position of the display surface and light emitted from a second position of the display surface. A deflection angle at which the light emitted from the first position is diffracted by the diffraction optical element is larger than a deflection angle at which the light emitted from the second position is diffracted by the diffraction optical element. Of the image light in a wavelength range expressing the hue, a wavelength peak of the light emitted from the first position is present on a long wavelength side with respect to a wavelength peak of the light emitted from the second position.

Abstract: A virtual image display apparatus includes an image light emitting unit configured to emit image light, and a see-through mirror which is an optical member having a reflective film that reflects the image light, wherein the see-through mirror includes a first region on which a light ray of the image light corresponding to a center angle of view is incident and a second region on which a light ray of the image light which different from the light ray corresponding to the center angle of view is incident, a film thickness in the first region of the reflective film is thicker than a film thickness in the second region, and the first region of the reflective film has reflectivity characteristics corresponding to a wavelength band which is wider toward the long wavelength side than a wavelength band of the image light emitted from the image light emitting unit.

Abstract: Provided is a display method for displaying an image based on a color original image. The display method includes guiding an image light corresponding to the color original image to a display position by an optical system, and deflecting a traveling direction of the image light to an observer and performing display by a diffraction optical element. At the time of displaying the color original image, the image light entering the first diffraction optical element includes a light entering at a first angle and a light entering at a second angle that is larger than the first angle, a chromaticity range of the image of the color original image at a position corresponding to the light entering at the first angle is limited to be close to a chromaticity range of the light entering at the second angle.

Abstract: A display device or optical module includes a display element that emits image light, an imaging optical system as a light guide optical device that has non-axial symmetry in a predetermined direction and forms an exit pupil by light guiding of the image light from the display element, and a light-shielding member disposed between the display element and the imaging optical system, wherein the light-shielding member has a light-shielding part disposed to overlap an unused region in which an image is not displayed in a display region of the display element.

Abstract: A virtual image display apparatus according to the present disclosure includes a first display module, a second display module, and a coupling portion having an adjustable structure. The adjustable structure adjusts the first display module with respect to the second display module at least a relative rotational position and relative positions in longitudinal and depth directions.

Abstract: A display device includes an image element, a prism mirror that receives image light emitted from the image element through a light incident surface, reflects the image light with an inner reflection surface, and emits the image light from a light emission surface, and a see-through mirror that reflects the image light emitted from the prism mirror toward a pupil position, wherein the prism mirror emits the image light incident from a front to be bent in a direction inclined with respect to the front, and a light emission side of an image source that includes the image element and the prism mirror is covered with a light transmission window that blocks dust.

Abstract: An optical module according to the present disclosure includes a display element, a first optical member, a second optical member, a third optical member, and an adhesive joints the first optical member and the second optical member. A first optical member includes a first positioning portion that performs a positioning with respect to a second optical member and the second optical member includes a second positioning portion that performs a positioning with respect to the first optical member.

Abstract: A display device according to the present invention includes, along an optical path of image light emitted from an image light generating device, a first optical unit having positive power, a second optical unit having positive power and including a first diffraction element of a reflective type, a third optical unit having positive power, and a fourth optical unit having positive power and including a second diffraction element of a reflective type. The second optical unit includes a first light-transmitting member having optical power and provided at a first surface of the first diffraction element, and a light shielding member provided at a second surface of the first diffraction element.

Abstract: An image display device of the present disclosure includes an image light generating device, a first, a second, a third, and a fourth optical unit. A first intermediate image is formed between the first and the third optical unit. A pupil is formed between the second and the fourth optical unit. A second intermediate image is formed between the third and the fourth optical unit. An exit pupil is formed at an opposite side of the fourth optical unit from the third optical unit. The image light generating device includes a first, a second, a third light emitting panel, and a color synthesis element. The color synthesis element is constituted of a cross dichroic prism including a first and a second dichroic film that intersect with each other. Each of the first and the second dichroic film does not have a polarization separation characteristic.