Abstract: A display apparatus includes an image forming device, first and second light guide members that respectively have first and second light incidence portions and first and second light emission portions, a first diffractive optical element provided in the first light emission portion, a second diffractive optical element provided in the second light emission portion, and a first external light noise reduction element provided over the second light guide member. The first external light noise reduction element overlaps the first and second light emission portions. The first light incidence portion overlaps the second light incidence portion. Image light from the image forming device is incident on the first light incidence portion. A part of the image light is guided in the first light guide member. Another part of the image light is incident on the second light incidence portion and is guided in the second light guide member.

Abstract: A head-mounted display apparatus according to the present disclosure includes an image generating module, a first deflecting element including a first deflecting portion configured to deflect, along a second optical axis intersecting the first optical axis, imaging light from the image generating module, and a second deflecting portion configured to deflect the imaging light along a third optical axis, a first diffraction element configured to diffract the imaging light from the second deflecting portion, and a second diffraction element configured to diffract the imaging light from the first diffraction element. A distance along the first optical axis between the image generating module and the first deflecting portion is longer than a distance along the third optical axis between the first diffraction element and the second deflecting portion.

Abstract: A light source device according to the present disclosure includes a light-emitting body configured to emit first wavelength range light, a dichroic film configured to be able to selectively transmit the first wavelength range light, a wavelength converter that includes an incident surface on which the first wavelength range light is incident, and an emission surface configured to convert the first wavelength range light to second wavelength range light and subsequently emit, and for which the incident surface is set to be larger than the emission surface, and a light collector including a light collecting part configured to collect the second wavelength range light, wherein the light-emitting body, the dichroic film, and the wavelength converter are subjected to direct bonding, in a state of being stacked in this order, in an emission direction of the first wavelength range light from the light-emitting body.

Abstract: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.

Abstract: A display device according to the present disclosure includes an imaging light generating device configured to emit imaging light, a first diffraction element configured to diffract the imaging light emitted from the imaging light generating device, a second diffraction element configured to diffract the imaging light diffracted by the first diffraction element to form an exit pupil, and an optical filter disposed between the imaging light generating device and the exit pupil, and configured to attenuate a band on a short wavelength side of a peak wavelength of red light included in the imaging light emitted from the imaging light generating device.

Abstract: A virtual image display apparatus includes an imaging light emitting unit configured to emit imaging light, and a light-guiding unit configured to guide the imaging light. The light-guiding unit is configured by arranging a first, a second, a third, and a fourth optical system in the stated order in a travel direction of the imaging light. The first optical system forms a first intermediate image of the imaging light. The second optical system includes a first diffraction element forming a pupil between the second and the fourth optical system. The third optical system forms a second intermediate image. The fourth optical system includes a second diffraction element forming an exit pupil by diffracting the imaging light. At the exit pupil, luminance of pixels at a central position of the imaging light and luminance of pixels at end positions of the imaging light differ.

Abstract: A display device according to the present disclosure includes a first optical unit having positive power, a second optical unit including a first diffraction element and having positive power, a third optical unit having positive power, and a fourth optical unit including a second diffraction element and having positive power, and the first to fourth optical units are provided along an optical path of imaging light emitted from an imaging light generating device. The second optical unit further includes a first member provided at one surface side of the first diffraction element, and a second member provided on a side of the first member opposite to a side where the first diffraction element is located, the first member is transmissive and has an elastic modulus of 50 GPa or greater, and the second member is transmissive and has optical power.

Abstract: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.

Abstract: A light source device according to the present disclosure includes a light-emitting body configured to emit first wavelength range light, a dichroic film configured to be able to selectively transmit the first wavelength range light, a wavelength converter that includes an incident surface on which the first wavelength range light is incident, and an emission surface configured to convert the first wavelength range light to second wavelength range light and subsequently emit, and for which the incident surface is set to be larger than the emission surface, and a light collector including a light collecting part configured to collect the second wavelength range light, wherein the light-emitting body, the dichroic film, and the wavelength converter are subjected to direct bonding, in a state of being stacked in this order, in an emission direction of the first wavelength range light from the light-emitting body.

Abstract: A display device of the present disclosure 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 that includes a first diffraction element and has positive power, a third optical unit having positive power, and a fourth optical unit that includes a second diffraction element and has positive power. A first diffraction angle of the image light at the first diffraction element is different from a second diffraction angle of the image light at the second diffraction element. A correction optical system that corrects an incident angle of the image light with respect to the second diffraction element is provided between the first optical unit and the fourth optical unit on the optical path.

Abstract: A head-mounted display apparatus according to the present disclosure includes an image generating module, a first deflecting element including a first deflecting portion configured to deflect, along a second optical axis intersecting the first optical axis, imaging light from the image generating module, and a second deflecting portion configured to deflect the imaging light along a third optical axis, a first diffraction element configured to diffract the imaging light from the second deflecting portion, and a second diffraction element configured to diffract the imaging light from the first diffraction element. A distance along the first optical axis between the image generating module and the first deflecting portion is longer than a distance along the third optical axis between the first diffraction element and the second deflecting portion.

Abstract: A head-mounted display apparatus according to an aspect of the present disclosure includes an imaging light generating device, a first deflection element including a first deflection section configured to deflect imaging light in a first direction and a second deflection section configured to deflect the imaging light in a second direction, a first diffraction element, and a second diffraction element. When a plane surrounded by the principal ray passing plane, the first principal ray, the second principal ray, and the first deflection section is taken as a first plane, and a plane surrounded by the second deflection section, the first principal ray, the second principal ray, and the first diffraction element is taken as a second plane, the first plane overlaps with at least a part of the second plane when viewed from the third direction and does not overlap with the second plane when viewed from the fourth direction.

Abstract: An optical module according to the present disclosure includes a cross dichroic prism, a first display panel, a second display panel, a third display panel, a first adhesive layer configured to bond the first display panel to the cross dichroic prism, a second adhesive layer configured to bond the second display panel to the cross dichroic prism, and a third adhesive layer configured to bond the third display panel to the cross dichroic prism. At least one of the first adhesive layer, the second adhesive layer, and the third adhesive layer includes a spacer member.

Abstract: A head-mounted display apparatus includes a cross dichroic prism including four triangular prisms that are mutually bonded, and a first dichroic film and a second dichroic film provided between adjacent prisms of the four triangular prisms, a plurality of display panels arranged respectively opposite to a plurality of light incident planes of the cross dichroic prism, and a projection optical system configured to project light emitted from the cross dichroic prism onto a pupil of a user. The cross dichroic prism includes an optically imperfect part at a center of a bonded part of the four triangular prisms. A ratio between an aerial conversion length from each of light-emission planes of the plurality of display panels to the center of the bonded part, and a width of the optically imperfect part, is greater than or equal to 250:1.

Abstract: An image display device is capable of easily adjusting a diopter scale with respect to a virtual image. The image display device includes an image generating unit that emits image light including image information, a first optical system that forms an intermediate image by condensing the image light, a second optical system that guides a virtual image to eyes of a viewer by deflecting the light from the intermediate image, and guides the light to the eyes of the viewer by transmitting external light, and an intermediate image position changing device that adjusts a position of the virtual image in depth direction by changing a position of the intermediate image.

Abstract: An image display device with which it is possible to visually recognize an image while securing the see-through property regardless of eye movements and changes in interpupillary distance, with which it is possible to display a large-size image with high quality, and which is small, has excellent wearability, and has an excellent external appearance.

Abstract: A display device includes a first diffraction element configured to diffract image light and a second diffraction element disposed on as optical path between a light source and the first diffraction element. The first and the second diffraction element emit light beams that have highest diffraction efficiencies in one direction when a single wave light enters from directions of normals. If the sum of the number of reflections of light and the number of times of intermediate image generation between the second diffraction element and the first diffraction element is an even number, in the first and the second diffraction element, the directions of the diffraction light having the highest diffraction efficiencies are output when light enters from the directions of the normals are the same with respect to the directions of the normals to the incident planes. If the sum is an odd number, the directions are opposite.

Abstract: A light-guiding device used in a display device includes a plurality of first half mirrors between a first light-guiding body and a second light-guiding body. Each of the first half mirrors is formed on a first surface extending along a first direction of the first surface and a second surface extending along a second direction in the first light-guiding body. The first light-guiding body includes a third surface overlapping the second surface in a direction along a third direction in which two first surfaces located on both sides of the second surface do not overlap each other between the first surface and the second surface. The third surface extends in a direction different from the first direction.

Abstract: In an optical system, a first optical section having positive power, a second optical section provided with a first diffractive element and having positive power, a third optical section having positive power, and a fourth optical section provided with a second diffractive element and having positive power are disposed along a light path of image light emitted from an image light generation device. A first intermediate image of the image light is formed between the first optical section and the third optical section, a pupil is formed in the vicinity of the third optical section, a second intermediate image of the image light is formed between the third optical section and the fourth optical section, and the fourth optical section collimates the image light to form an exit pupil. The first diffractive element and the second diffractive element are in a conjugate relation or a roughly conjugate relation.

Abstract: A display device of the embodiment includes an image generating unit which emits a light including an image information, and a light guide optical system which generates an image from the light which is emitted from the image generating unit at a position of an exit pupil, in which the light guide optical system is provided with a first mirror (a first deflection unit) which deflects the light which is emitted from the image generating unit, and a second mirror (a second deflection unit) which further deflects the light which is deflected by the first mirror to guide the light to the position of the exit pupil and transmits a portion of external light, and in which an optical axis of the light which propagates from the first mirror toward the second mirror and an optical axis of the exit pupil form an acute angle.