JP2024025216A - Display unit and optical display device - Google Patents

Abstract

To reduce the weight of an optical display device.SOLUTION: A display unit comprises: an attachment member that is attached to a first accommodation member accommodating a lens group including an objective lens and an eye-piece; a display element that emits video light; an optical member having an incident part on which the video light emitted from the display element is incident, an emission part that emits the video light and is arranged on an axis of the lens group, and a light guide part that guides the video light incident from the incident part toward the emission part; and a second accommodation member that accommodates the display element and the optical member.SELECTED DRAWING: Figure 2

Description

The present invention relates to a display unit and an optical display device.

In recent years, there has been an increasing demand from observers using observation devices such as binoculars, telescopes, and microscopes to superimpose observation images and videos. For example, when observing wild birds with binoculars, it would be desirable to have a function that instantly displays the name of the bird on the image being observed, or a function that instantly displays the magnification on the image observed with a microscope. .

Patent Document 1 discloses an optical device including a first objective lens, a second objective lens, an eyepiece, a beam splitter, and a display. In the optical device of Patent Document 1, the image light emitted from the display passes through the second objective lens, and the beam splitter disposed between the first objective lens and the eyepiece on the optical path of the observation light passes through the first objective lens. It is overlapped with the observation light after passing through. An intermediate image is formed between the beam splitter and the eyepiece on the optical path of the observation light and the image light. As a result, an observer using the optical device of Patent Document 1 can visually recognize an intermediate image in which the observation image and the image light overlap each other.

JP 2019-174569 Publication

In the optical device disclosed in Patent Document 1 mentioned above, image light emitted from a display (display element) travels along a linear optical axis on the incident side, passes through a lens, and is transmitted without being deflected. The beam is irradiated directly onto the beam splitter interface. The image light incident on the boundary surface is reflected along a linear exit-side optical axis that is formed by folding the input-side optical axis around the boundary surface, and the exit-side optical axis of the image light passes through the objective lens. Since it is oriented parallel to the optical axis of the subsequent observation light, the image light reflected by the boundary surface overlaps the observation light after passing through the objective lens. Therefore, when viewed along the optical axis on the incident side of the image light, the size of the boundary surface of the beam splitter is required to be at least larger than the size of the image light after passing through the lens. This becomes a design constraint. Furthermore, a design constraint is that the beam splitter is placed on the optical path of the observation light with the boundary surface of the beam splitter tilted at a predetermined angle with respect to the optical axes on the incident and exit sides of the image light. Become. In the optical device of Patent Document 1, design constraints cannot be relaxed, so it is difficult to reduce the size of the beam splitter, and the total weight may increase. Therefore, there has been a demand for miniaturization of optical devices (optical display devices).

In order to solve the above problems, a display unit according to one aspect of the present invention includes a mounting member attached to a first housing member that houses a lens group including an objective lens and an eyepiece, and a display element that emits image light. an entrance part into which the image light emitted from the display element is incident; an exit part which emits the image light and is arranged on the axis of the lens group; The display device includes an optical member having a light guide portion that guides light, and a second housing member that houses the display element and the optical member.

1 is a schematic diagram of an optical display device according to a first embodiment of the present invention. FIG. 2 is a schematic diagram of the optical display device shown in FIG. 1 when viewed from direction D. FIG. 2 is a schematic diagram of an optical display device according to a second embodiment of the present invention. 4 is a schematic diagram of an optical member of the optical display device shown in FIG. 3. FIG. FIG. 3 is a schematic diagram of an optical display device according to a third embodiment of the present invention. FIG. 7 is a schematic diagram of a portion of an optical display device according to a fourth embodiment of the present invention. 7 is a schematic diagram of an optical member of the optical display device shown in FIG. 6. FIG. FIG. 7 is a schematic diagram of a portion of an optical display device according to a fifth embodiment of the present invention. 9 is a schematic diagram of an optical member of the optical display device shown in FIG. 8. FIG. FIG. 7 is a schematic diagram of a portion of an optical display device according to a sixth embodiment of the present invention. 11 is a schematic diagram of an optical member of the optical display device shown in FIG. 10. FIG. FIG. 7 is a schematic diagram of a portion of an optical display device according to a seventh embodiment of the present invention. 13 is a schematic diagram of an optical member of the optical display device shown in FIG. 12. FIG. 13 is a schematic diagram of an optical member of a first modification of the optical display device shown in FIG. 12. FIG. 13 is a schematic diagram of a part of an optical display device of a second modification example of the optical display device shown in FIG. 12. FIG. FIG. 7 is a schematic diagram of a part of an optical display device according to an eighth embodiment of the present invention. It is a schematic diagram of the optical member of other embodiments of the present invention. It is a schematic diagram of the optical member of other embodiments of the present invention.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described using FIGS. 1 and 2.
FIG. 1 is a schematic diagram showing the configuration of an optical display device 101 according to a first embodiment of the present invention, and is a diagram when the optical display device 101 is viewed from above. In addition, in each of the following drawings, the scale of dimensions may be changed depending on the component in order to make each component easier to see.

As shown in FIG. 1, the optical display device 101 includes binoculars (distant viewing device) 201 and the display unit 11 of the first embodiment.

In this specification, a direction parallel to a line (not shown) connecting the centers of the right eye ER and left eye EL of an observer using the binoculars 201 is defined as the X direction, and the center of the right eye ER and the center of the left eye EL are defined as the X direction. The reference line BL is an imaginary line that passes through an intermediate position and extends parallel to the front-rear direction of the visual fields of the right eye ER and left eye EL. In the X direction, the direction approaching the reference line BL is referred to as the -X direction, the position relatively close to the reference line BL is referred to as the -X side position, and the direction away from the reference line BL and the direction relatively far from the reference line BL The position may be referred to as the +X side position.

Further, a direction perpendicular to the X direction and parallel to the front-rear direction of the visual fields of the right eye ER and left eye EL is defined as the Z direction. In the Z direction, the direction from the position where an unillustrated object to be observed exists toward the observer's right eye ER and left eye EL is referred to as the +Z direction, and the direction opposite to the +Z direction is sometimes referred to as the -Z direction. be. A relatively forward position in the +Z direction is referred to as a +Z side position, or an image side position, and a relatively backward position in the +Z direction, that is, a position in front of the -Z direction, is referred to as a -Z side position, or an object side position. Sometimes referred to as the location. Further, a direction perpendicular to the X direction and the Z direction and parallel to the vertical direction is defined as the Y direction. In the Y direction, the direction from the bottom to the top is sometimes referred to as the +Y direction, and the direction opposite to the +Y direction is sometimes referred to as the -Y direction. The relatively forward position in the +Y direction is referred to as the +Y side position, or the upper position, and the relatively backward position in the +Y direction, that is, the front position in the -Y direction, is referred to as the -Y side position, or the lower position. Sometimes referred to as location.

Hereinafter, observation light refers to light emitted from an object to be observed and visually recognized by an observer through the binoculars 201. The image light is image light that indicates information about an object to be observed, and represents light that is emitted from a display element 50 (described later) and visually recognized by an observer through binoculars 201.

The binoculars 201 are of a type called a regular Porro rather than a so-called mini-Porro among the Porro type or Porro prism type binoculars. The binoculars 201 include a lens barrel (first housing member) 211 and lens group for the right eye, a lens barrel (first housing member) 212 and lens group 222 for the left eye, and a connecting member 230.

The lens barrel 211 for the right eye accommodates a lens group for the right eye. The lens barrel 212 for the left eye accommodates a lens group 222 for the left eye. The shapes of the lens barrels 211 and 212 are appropriately designed according to the overall shape of the lens group corresponding to each. Specifically, the lens barrels 211 and 212 extend in the +Z direction from the object side end, curve in the -X direction while expanding downward, and extend in the +Z direction to the image side end. The lens barrel 211 for the right eye is equivalent to the lens barrel 212 for the left eye that is folded back with reference to the reference line BL. The object-side ends and image-side ends of the lens barrels 211 and 212 are open. In other words, the lens barrels 211 and 212 are cylindrical casings.

Although the lens group for the right eye is omitted in FIG. 1, the lens group for the right eye is equivalent to the lens group 222 for the left eye folded back with reference to the reference line BL. Below, only the lens group 222 will be explained.

Lens group 222 includes at least an objective lens 250 and an eyepiece lens 270. The objective lens 250 is an optical element disposed closest to the image side in the lens group 222, and is fitted into the end of the lens barrel 212 on the object side. The eyepiece lens 270 is an optical element disposed closest to the image side in the lens group 222, that is, closest to the left eye EL, and is fitted into the image-side end of the lens barrel 212. In FIG. 1, each of the objective lens 250 and the eyepiece lens 270 is illustrated as a single biconvex lens. However, one or both of the objective lens 250 and the eyepiece lens 270 may be a compound lens in which a plurality of lenses are arranged at intervals on the axis AX1 of the lens group 222, and two or more lenses may be used. It may be a cemented lens that is cemented to each other on the axis AX1, or it may be configured by a combination of a compound lens and a cemented lens. The axis AX1 means the optical axis of the observation light and the image light that pass through the entire lens group 222.

Further, the lens group 222 may include prisms 261 and 262. The prism 261 is arranged between the objective lens 250 and the eyepiece lens 270 on the optical path of observation light (not shown), that is, on the axis AX1. Prism 261 has a substantially square shape when viewed along the X direction, a substantially trapezoidal shape when viewed along the Y direction, and an elliptical shape when viewed along the Z direction.

Prism 261 has a transmitting surface 261a and reflective surfaces 261b and 261c. The transmission surface 261a is a plane parallel to the XY plane including the X direction and the Y direction, and transmits observation light and image light to be described later. The reflective surface 261b is a curved surface that is curved so as to be convex toward the +X side when it moves along the Y direction, and moves toward the −X side as it moves in the +Z direction. The reflective surface 261c is a curved surface that is curved so as to be convex toward the −X side when it moves along the Y direction, and moves toward the +X side as it moves in the +Z direction. The reflective surfaces 261b and 261c totally reflect the observation light and the image light.

The prism 262 is disposed immediately after the prism 261 on the axis AX1, that is, at a position on the image side of the prism 261 on the axis AX1. In reality, the prism 262 overlaps with a portion on the −X side of the center of the prism 261 in the X direction, overlaps with a portion below the center of the prism 261 in the Y direction, and protrudes below the prism 261, It is arranged at a position on the −Z side with respect to the prism 261 in the Z direction. The transmission surface 262a of the prism 262 is arranged parallel to the transmission surface 261a of the prism 261, and is arranged with a gap between the transmission surface 261a and the transmission surface 261a in the Z direction.

Prism 262 has a transmitting surface 262a and reflective surfaces 262b and 262c. The transmission surface 262a is a plane parallel to the XY plane, and transmits observation light and image light. The reflective surface 262b is a curved surface that is curved so as to be convex toward the +Y side when it moves along the X direction, and moves toward the +Y side as it moves in the +Z direction. The reflective surface 262c is a curved surface that is curved so as to be convex toward the −Y side when moving along the X direction, and moves toward the −Y side as the reflective surface 262c moves in the +Z direction.

The materials of the objective lens 250, the prisms 261 and 262, and the eyepiece 270 are not particularly limited as long as they can transmit observation light and image light, and are, for example, optical glass or quartz.

FIG. 2 is a schematic diagram showing the configuration of the optical display device 101 when viewed from direction D shown in FIG. As shown in FIGS. 1 and 2, the display unit 11 includes a mounting member 21, a housing (second housing member) 31, a display element 50, a lens 55, and an optical member 111.

The attachment member 21 is a member that is attached to the object side end of the lens barrel 212 of the binoculars 201 from the object side, that is, from the -Z side, and is detachable from the lens barrel 212. The configuration and shape of the attachment member 21 are not particularly limited as long as it can be attached to and detached from the object-side end of the lens barrel 212. The mounting member 21 is, for example, a member that can lock the object-side end of the lens barrel 212 from the outside in the radial direction. When viewed along the Z direction, the mounting member 21 does not overlap at least the optical path of the observation light before entering the objective lens 250.

The housing 31 has an internal space 40 formed therein. The internal space 40 accommodates a display element 50, a lens 55, an optical member 111, and a signal processing device 70. The housing 31 is appropriately designed according to the overall shape and size of the optical system including the lens 55 and the optical member 111 for superimposing the image light emitted from the display element 50 with the observation light. Since the housing 31 is removably attached to the end of the lens barrel 212 in cooperation with the mounting member 21, it is removably attached to the lens barrel (first housing member) 212 that accommodates the lens group 222 in the first embodiment. This is a part of the mounting member.

Specifically, the housing 31 is formed in a rectangular parallelepiped shape and includes an upper wall 32, a bottom wall 33, and side walls 34, 35, 36, and 37. The upper wall portion 32 has an inner wall surface and an outer wall surface that are substantially parallel to the XY plane, and is located above the lens barrel 212. The bottom wall portion 33 has an inner wall surface and an outer wall surface that are substantially parallel to the XY plane, and is located below the lower end of a half mirror 161, which will be described later.

The side wall section 34 has an inner wall surface and an outer wall surface that are substantially parallel to the XZ plane including the X direction and the Z direction, and connects the +Z side ends of the top wall section 32 and the bottom wall section 33. The side wall portion 34 is located on the +Z side, that is, on the image side, with respect to the +Z side end of the half mirror 161, and is arranged adjacent to the object side end of the lens barrel 212 in the Z direction. A transmission region is provided in the side wall portion 34 in a region overlapping with the optical paths of the observation light and the image light. The side wall portion 36 has an inner wall surface and an outer wall surface that are substantially parallel to the XZ plane, and connects the −Z side ends of the top wall portion 32 and the bottom wall portion 33 to each other. The side wall portion 36 is located on the -Z side, that is, on the object side, with respect to the -Z side end of the half mirror 161. A transmission region is provided in a region of the side wall portion 36 that overlaps with the optical path of the observation light.

The side wall portion 35 has an inner wall surface and an outer wall surface that are substantially parallel to the YZ plane including the Y direction and the Z direction, and the +X side ends of the top wall portion 32 and the bottom wall portion 33 and the side wall portions 34 and 36 Connect the +X side ends of each. The side wall section 37 has an inner wall surface and an outer wall surface that are substantially parallel to the YZ plane, and the -X side ends of the top wall section 32 and the bottom wall section 33 and the -X side ends of each of the side wall sections 34 and 36. Connect the ends of

The material of the housing 31 is not particularly limited. However, if the material of the casing 31 is a material that does not transmit the observation light and the image light or is difficult to transmit the observation light and the image light, openings are formed in the transmission areas of the side walls 34 and 36, or only the transmission areas pass the observation light and the image light. It is made of a material that allows image light to pass through. The inner wall surfaces of each of the top wall portion 32, the bottom wall portion 33, the side wall portions 35 and 37, and the inner wall surfaces of areas other than the transmission areas of the side wall portions 34 and 36 are subjected to light shielding treatment such as thread cutting and black coating. It is preferable that By applying light shielding treatment to these inner wall surfaces, it is possible to suppress diffuse reflection of the image light emitted from the display element 50 on the inner wall surfaces, and to prevent the occurrence of ghosts.

The side walls 34 and 36 of the housing 31 may be omitted, and the housing 31 may be open toward the +Z side and the -Z side. Note that by providing the side walls 34 and 36, it is possible to prevent the viewer's hands from touching the display element 50, lens 55, and optical member 111 when handling the display unit 11. As a result, it is possible to prevent misalignment of the axis AX2, external impact to and damage to each of the display element 50, lens 55, and optical member, and misalignment of the relative positions of these components. Further, by providing the side wall portions 34 and 36, a dustproof effect for the internal space 40 can be obtained.

The display element 50 is arranged in the internal space 40 of the housing 31, and specifically, in a predetermined position on the +Y side of the internal space 40. The display element 50 has a display surface 52 that emits image light. The display surface 52 is arranged parallel to the XZ plane and faces the internal space 40. Note that the display element 50 may be provided on the inner wall surface of the upper wall portion 32, that is, the wall surface facing the internal space 40.

The display element 50 is a self-luminous element such as an OLED (Organic Light Emitting Diode) or a laser MEMS as a light source capable of emitting image light so as not to affect the observation light when superimposed with the observation light as described later. (Micro Electro Mechanical Systems) is preferred. By using these light sources in the display element 50, the occurrence of so-called black floating in the image light can be prevented and the image light can be displayed clearly. However, if the black floating of the image light is not a problem, the display element 50 may be, for example, LCoS (Liquid Crystal on Silicon, registered trademark), LED (Light Emitting Diode), LCD (Liquid Crystal Display), or LED. With LCD It may be a combination.

The lens 55 is disposed in the internal space 40 of the housing 31, and specifically, is disposed at a predetermined position in front of the display element 50, that is, below and on the −Y side on the optical path of the image light emitted from the display element 50. has been done. The lens 55 forms an image of the image light in front of the lens 55 on the optical path. The lens 55 may be a biconvex lens as illustrated in the figure, or may be a rotationally symmetrical spherical lens including a plano-convex lens other than a biconvex lens, an aspherical lens, a free-form lens, or a diffractive lens including a Fresnel lens. It may be either. Further, the lens 55 may be a compound lens in which a plurality of lenses are arranged at intervals on the axis AX2 of the lens 55, or a cemented lens in which two or more lenses are cemented to each other on the axis AX2. or may be configured by a combination of a compound lens and a cemented lens. The axis AX2 means the optical axis of the image light passing through the lens 55. The shape of the lens 55 and parameters including the numerical aperture (NA) are appropriately designed in consideration of the size of the display surface 52, the beam area and wavelength of the image light, and the like.

The material of the lens 55 is not particularly limited as long as it can transmit image light, and may be, for example, optical glass or quartz, or resin such as plastic.

Note that it is preferable that the distance between the lens 55 and the display element 50 on the axis AX2 can be finely adjusted. For example, the position of the display element 50 on the axis AX2 may be fixed, and the position of the lens 55 on the axis AX2 may be movable, or the lens 55 may be provided with a moving mechanism (not shown). For example, if the focal lengths and imaging positions of the observation light and the image light are shifted from each other, the distance between the lens 55 and the display element 50 on the axis AX2 can be adjusted. Focal lengths and imaging positions can be aligned with each other. In addition, even when the position of the object to be observed changes suddenly, or when the optical display device 101 is shared by multiple observers and there are differences in visual recognition ability among the observers, the lens on the axis AX2 By adjusting the distance between the display element 55 and the display element 50, each viewer can visually recognize the image light without feeling uncomfortable with the observation light.

The optical member 111 includes a light guide member 121 and a half mirror (first half mirror) 161. The light guide member 121 is a member formed in the shape of a rectangular parallelepiped. The light guide member 121 includes a top surface 122, a bottom surface 123, side surfaces 124, 125, 126, and 127, and an inclined surface 128.

The upper surface 122 is a surface substantially parallel to the XY plane, and is located at a position on the +Y side of the +Y side end of the objective lens 250 and on the -Y side of the lens 55. The upper surface 122 faces the display surface 52 of the display element 50 with the lens 55 in between. The size of the upper surface 122 in the X direction is a predetermined size smaller than the size of the objective lens 250 in the X and Z directions. The size of the top surface 122 in the Z direction is smaller than the size of the top surface 122 in the X direction. The size of the upper surface 122 in the X direction and the Z direction will be explained later.

The bottom surface 123 is a surface substantially parallel to the XY plane and parallel to the top surface 122, and is disposed at a position on the −Y side from the −Y side end of the objective lens 250. The bottom surface 123 is located on the opposite side of the light guide member 121 from the top surface 122 and has the same shape and size as the top surface 122.

The side surface 124 is a surface substantially parallel to the XZ plane, and connects the ends of the top surface 122 and the bottom surface 123 on the +Z side. A portion of the side surface 124 faces the objective lens 250 across the transmission area of the side wall portion 34 of the housing 31 . The size of the upper surface 122 in the X direction is approximately the same as the size of the objective lens 250 in the X direction. The size of the side surface 124 in the Z direction is larger than the size of the side surface 124 in the X direction. The size of the side surface 124 in the Z direction will be explained later.

The side surface 126 is a surface substantially parallel to the XZ plane and parallel to the side surface 124, and connects the −Z side ends of the top surface 122 and the bottom surface 123. The side surface 126 is located on the opposite side of the side surface 124 in the light guide member 121, and has the same shape and size as the side surface 126. The side surfaces 124 and 126 overlap the axis AX1 between the object to be observed and the objective lens 250 in the X direction and the Y direction. That is, the axis AX1 from the object to the objective lens 250 passes through the light guide member 121.

The side surface 125 is a surface substantially parallel to the YZ plane, and connects the +X side ends of the top surface 122 and the bottom surface 123 and the +X side ends of the side surfaces 124 and 126. The side surface 127 is a surface substantially parallel to the YZ plane and parallel to the side surface 125, and connects the −X side ends of the top surface 122 and the bottom surface 123, and the −X side ends of the side surfaces 124 and 126. .

The material of the light guide member 121 is a material that can transmit the image light and the observation light, and has a refractive index that allows the image light to be totally reflected on the side surfaces 124 to 127, as described later. The material of the light guide member 121 is, for example, a resin material, optical glass, quartz, or the like.

The inclined surface 128 is provided in a region of the light guide member 121 that substantially overlaps the maximum region of the objective lens 250 in the X direction and the Y direction. The inclined surface 128 forms approximately 45 degrees with each of the axes AX1 and AX2 when viewed along the X direction, and is inclined with respect to the XY plane and the XZ plane.
The center portions of the inclined surface 128 in the X direction, Y direction, and Z direction are arranged on the intersection of the axes AX1 and AX2.

The half mirror 161 is provided on the inclined surface 128 of the light guide member 121. The center portions of the half mirror 161 in the X direction, Y direction, and Z direction are arranged on the intersection of the axes AX1 and AX2. Similar to the inclined surface 128, the surface of the half mirror 161 forms approximately 45 degrees with each of the axes AX1 and AX2 when viewed along the X direction, is inclined with respect to the XY plane and the XZ plane, and is tilted in the +Z direction. As it moves, it moves in the -Y direction.

The transmittance of the observation light in the half mirror 161 is preferably 50% or more. This makes it possible to suppress a decrease in the transmittance of observation light in the optical display device 101 as much as possible. The transmittance of the image light in the half mirror 161 is, for example, 30% or more. The half mirror 161 may be made of metal such as silver, but is preferably made of a dielectric multilayer film. By forming the half mirror 161 with a dielectric multilayer film, it is possible to increase the transmittance of observation light that enters the half mirror 161 from the −Z side.

When the image light may be monochromatic, the image light having a wavelength corresponding to a predetermined monochromatic color is emitted from the display surface 52 of the display element 50. In this case, the half mirror 161 may be formed to have a high reflectance only for light having a wavelength of a predetermined color and to transmit light having a wavelength other than the predetermined color. The predetermined color is, for example, green or blue, but is not particularly limited as long as it is visible to the observer.

The signal processing device 70 is placed at an arbitrary location that is electrically connected to the display element 50, and is placed, for example, in the internal space 40 of the housing 31 at a position that does not overlap with the optical path of the image light. The signal processing device 70 generates an electrical signal of the video light based on at least character information and image information corresponding to object information included in the observation light, transmits the electrical signal to the display element 50, and displays the display element 50. Image light corresponding to the electric signal is emitted from the display surface 52. In order to obtain information about the object contained in the observation light, the signal processing device 70 receives, for example, a part of the observation light that has passed through the half mirror 161, or captures the movement of the observer and identifies the object by image recognition or the like. Equipped with a function or mechanism to obtain information regarding type and status. The signal processing device 70 is composed of, for example, a microcomputer or an integrated circuit that includes a built-in program for operating and processing the signal processing device 70 described above.

In order to reduce the weight of the display unit 11, the signal processing device 70 may be placed in a smartphone or tablet terminal device that can communicate with the display unit 11 owned by the viewer. The display unit 11 may operate standalone by disposing the signal processing device 70 in the housing 31, or may operate while connected to an external terminal device or computer by wire or wirelessly as described above. good.

In the optical display device 101 having the above-described configuration, observation light from an object to be observed is transmitted from a distance in a substantially parallel state along the axis AX1 through the transmission area of the side wall portion 36 of the casing 31 of the display unit 11 and the light guide. The light passes through the light member 121 , the half mirror 161 , and the transmission area of the side wall portion 34 of the housing 31 and enters the objective lens 250 . The observation light incident on the objective lens 250 passes through the reflective surface 262b of the prism 262, the transmitting surface 262a, and the transmitting surface 261a of the prism 261, and is totally reflected in the -X direction by the reflective surface 261b. The observation light totally reflected in the -X direction is totally reflected in the -Z direction by the reflective surface 261c, transmitted through the transmitting surface 261a and the transmitting surface 262a of the prism 262, and totally reflected in the -Y direction by the reflective surface 262b. The light is totally reflected in the +Z direction by the reflective surface 262c and transmitted through the transmitting surface 262a. As described above, the image of the observation light is erected by passing through the prisms 261 and 262. The observation light emitted from the prism 262 forms an image on the retina of the left eye EL by the eyepiece 270, and is visually recognized by the observer.

In the optical display device 101, when the display unit 11 is attached to the image side end of the lens barrel 212 of the binoculars 201 by the mounting member 21, the signal processing device When the image light corresponding to the electric signal from 70 is displayed, the image light is turned into substantially parallel light by the lens 55, and the parallel image light enters the light guide member 121 from the upper surface 122. The upper end portion including the upper surface 122 of the light guide member 121 is a portion into which the image light emitted from the display surface 52 of the display element 50 and passed through the lens 55 is incident, and constitutes an incident portion 131 in the optical member 111 .

Of the image light incident on the light guide member 121, the image light incident on the side surfaces 124 to 127 at an incident angle exceeding the critical angle is totally reflected by the side surfaces 124 to 127, and enters the half mirror 161 from the +Y side. . A part of the image light incident on the half mirror 161 is reflected by the half mirror 161, passes through the side surface 124 of the light guide member 121, and is superimposed on the observation light incident on the objective lens 250 from the object. That is, the observation light and the image light enter the objective lens 250 from optical paths that are aligned with each other along the axis AX1. The inclined surface 128 of the light guide member 121 is a surface that emits image light by providing a half mirror 161 on the surface and is arranged on the axis AX1 of the lens group 222. A side surface 124 of the light guide member 121 to which the image light reflected by at least the half mirror 161 is irradiated from the -Z side is a surface that emits the image light and is arranged on the axis AX1 of the lens group 222. The light guide member 121 includes a part of the inclined surface 128 and the side surface 124, and overlaps with the maximum area of the objective lens 250 when viewed along the axis AX1 between an object (not shown) and the objective lens 250. The portion constitutes the emission part 141 in the optical member 111.

Side surfaces 124 to 127 of the light guide member 121 on the +Y side with respect to the half mirror 161 totally reflect the image light incident from the incident section 131 and guide it inside the light guide member 121 toward the exit section 141. A portion of the light guide member 121 between the entrance section 131 and the exit section 141 in the Y direction constitutes a light guide section 151 in the optical member 111 .

The image light incident on the objective lens 250 follows the same optical path as the observation light, is erected into an image by the prisms 261 and 262, and is focused on the retina of the left eye EL by the eyepiece 270, where it is visually recognized by the observer. Ru.

Note that, in order to increase the proportion of the image light incident on the side surfaces 124 to 127 at an incident angle exceeding the critical angle, of the image light incident on the light guide member 121, the display surface 52 of the display element 50 and the half mirror 161 The axis AX2 between the half mirror 161 and the XY plane passing through the intersection of the axes AX1 and AX2 on the surface of the half mirror 161 may form a small angle with the intersection as the center. Alternatively, the upper surface 122 of the light guide member 121 may not be substantially parallel to the XZ plane, but may be at a small angle to the XZ plane. The small angle is, for example, about 5° to 10°.

The size of the light guide member 121 in the X direction and the Y direction is such that the image light, which has been made into parallel light by the lens 55, enters from the upper surface 122 of the light guide member 121 and is totally reflected on the side surfaces 124 to 127 as described above. The size and NA of each of the lens 55 and the objective lens 250 are appropriately designed so that the half mirror 161 is repeatedly irradiated with the light. By designing the size of the light guide member 121 as described above, the image light can be favorably superimposed on the observation light in the optical display device 101. The size of the light guide member 121 in the X direction and the Y direction is set to, for example, 50% to 80% of the size of the objective lens 250 in the X direction and the Y direction.

The size of the light guide member 121 in the Z direction is determined by taking into account the size of the light guide member 121 and the half mirror 161 in the X direction and the Y direction. The image light is appropriately designed so that it is repeatedly totally reflected on the side surfaces 124 to 127 and is irradiated onto the half mirror 161.

When the display unit 11 is attached to the image-side end of the lens barrel 212 of the binoculars 201 by the attachment member 21, the objective lens 250 is attached to the light guide member 121 of the optical member 111 on the axis AX1 of the lens group 222. It is arranged between the side surfaces 124 to 127 (light guide section 151) and the eyepiece lens 270. Further, the distance from the inclined surface 128 and side surface 124 (output section 141) of the light guide member 121 on the axis AX1 to the eyepiece 270 is the distance from the upper surface 122 (incident section 131) of the light guide member 121 on the axis AX2 to the display element. 50 to the display surface 52. This relative arrangement allows the viewer to approach the display unit 11 in the Z direction with a certain distance from the left eye EL, so that the viewer can comfortably view the display unit 11 while observing. can be handled.

The display unit 11 of the first embodiment described above includes the mounting member 21, the optical member 111, and the casing (second housing member) 31. The attachment member 21 is removably attached to a lens barrel (first housing member) 212 that houses a lens group 222 that includes an objective lens 250 and an eyepiece lens 270. The optical member 111 has an entrance section 131, an exit section 141, and a light guide section 151. Specifically, the optical member 111 includes a light guide member 121 that has an entrance section 131, an exit section 141, and a light guide section 151. ing. Image light emitted from the display surface 52 of the display element 50 is incident on the incident section 131 . The emitting section 141 emits image light and is arranged on the axis AX1 of the lens group 222. The light guide section 151 guides the image light incident from the entrance section 131 toward the exit section 141 . According to the display unit 11 of the first embodiment, the image light emitted from the display surface 52 of the display element 50 passes through the lens 55 and enters the light guide member 121 , which is the light guide section 151 . The light is totally reflected one or more times toward the half mirror 161 by the side surfaces 124 to 127, and hits the half mirror 161. The image light reflected by the half mirror 161 is reflected onto the optical path of the observation light before entering the objective lens 250, and is superimposed on the observation light. According to the display unit 11 of the first embodiment, the observed image visually recognized through the binoculars 201 and the image from the display element 50 are superimposed, so that the observer can visually recognize both the observed image and the image. Further, according to the display unit 11 of the first embodiment, at least a part of the image light emitted from the display surface 52 of the display element 50 is confined inside the light guide member 121 by the light guide section 151, and is transmitted to the emission section 141. It can be propagated towards. This increases the degree of freedom in the size of the light guide member 121 in each of the X direction, Y direction, and Z direction. It can also be designed to be smaller than the size in the X and Y directions. Therefore, according to the display unit 11 of the first embodiment, since the optical member 111 includes the light guide section 151, the size of the display surface 52 of the display element 50 in the X direction and the Z direction, and the size of the lens 55 in the X direction and Design constraints such as the size and NA in the Z direction and the size of the half mirror 161 in the X and Z directions can be relaxed, and the overall size can be reduced.

The optical display device 101 of the first embodiment includes the display unit 11 of the first embodiment and binoculars 201 having a lens group 222 including an objective lens 250 and an eyepiece 270. By using the optical display device 101 of the first embodiment, it is possible to realize binoculars 201 in which the display unit 11 can be detachably attached to the end of the lens barrel 212 on the objective lens 250 side. Furthermore, in the optical display device 101 of the first embodiment, since the display unit 11 smaller than the conventional one is attached to the binoculars 201, it is possible to reduce the size of the display unit 11 when attached to the lens barrel 212.

In the first embodiment, Porro prism binoculars are illustrated as the binoculars 201, but in binoculars to which the display unit 11 can be attached, the axes of the lens group including the objective lens and the eyepiece are substantially in a straight line. The binoculars may be roof prism type binoculars, Galileo type binoculars, or other types of binoculars. Furthermore, the axis between the objective lens and the eyepiece may be moved arbitrarily in any of the X, Y, and Z directions, and the shape of the axis of the lens group including the objective and eyepiece in binoculars is Not particularly limited. Further, the lens group may include, in addition to the objective lens, the eyepiece lens, and the prism, any optical element for focusing the observation light on the retina of the observer's eye and for erecting the observation image. In other words, the presence or absence of components other than the objective lens and the eyepiece in the lens group is not particularly limited.

Furthermore, in the first embodiment, the display unit 11 and the mounting member 21 can be attached and detached only to the lens barrel 212 for the left eye, but the display unit 11 and the mounting member 21 can only be attached to the lens barrel 211 for the right eye. It may be removable, or it may be removable from both lens barrels 211 and 212.

[Second embodiment]
Next, a second embodiment of the present invention will be described using FIGS. 3 and 4. Note that in each embodiment after the second embodiment, descriptions of contents common to the higher-level embodiment will be omitted, and the configuration of each embodiment that is different from the higher-level embodiment will be described. In each embodiment, the same components as those of the display unit 11 and the optical display device 101 of the first embodiment are given the same reference numerals, and the description thereof will be omitted. Further, in each embodiment, unless otherwise specified, modifications similar to those of the upper embodiment can be applied.

FIG. 3 is a schematic diagram showing the configuration of the optical display device 102 of the second embodiment when viewed from a direction corresponding to the direction D shown in FIG. As shown in FIG. 3, the optical display device 102 of the second embodiment includes binoculars 201 and the display unit 12 of the second embodiment.

In each figure after FIG. 3, the position where the observation light and image light are reflected by the reflective surface 261c of the prism 261 is expressed as R1, and the position where the observation light and image light is reflected by the reflective surface 262c of the prism 262 is expressed as R2. The illustration of the axis AX1 from position R1 to position R2 is omitted. That is, in each figure after FIG. 3, positions R1 and R2 are shown at the same position in the Y direction, but in reality, as explained with reference to FIGS. 1 and 2, position R2 is smaller than position R1. The axis AX1 between the positions R1 and R2 also moves in the X direction or the Y direction by the reflecting surfaces 261c and 262c. Moreover, in each figure after FIG. 3, the shapes of the prisms 261 and 262 are simplified.

The display unit 12 includes a mounting member 21, a housing 31, a display element 50, a lens 55, and an optical member 112. FIG. 4 is a schematic diagram of the optical member 112 when viewed from the +Z side, that is, when viewed along the −Z direction. As shown in FIGS. 3 and 4, the optical member 112 includes a light guide member 121, a half mirror (first half mirror) 161, a half mirror (second half mirror) 162, and a half mirror 163. There is. The light guide member 121 is a member formed in the shape of a rectangular parallelepiped, and includes a top surface 122, a bottom surface 123, side surfaces 124, 125, 126, and 127, and inclined surfaces 128, 171, and 172. The size of the light guide member 121 in the X direction is larger than that in the Z direction, and is suitably larger than the size of the objective lens 250 in the X direction.

The inclined surface (emission part) 171 is arranged at a position on the +Y side of the inclined surface 128 in the light guide member 121. The inclined surface (emission part) 172 is arranged at a position on the -Y side of the inclined surface 128 in the light guide member 121. Most of the inclined surfaces 171 and 172 are provided within a region that substantially overlaps the maximum region of the objective lens 250 in the X direction and the Y direction. The inclined surfaces 171 and 172 are parallel to the inclined surface 128 and extend along the direction in which the inclined surface 128 extends.

The size of the half mirror 161 in the X direction is approximately the same as the size of the objective lens 250 in the X direction. The size of the half mirror 161 in the Y direction is less than half the size of the objective lens 250 in the Y direction, for example, about ⅓ of the size of the objective lens 250 in the Y direction.

The half mirror 162 is provided on the inclined surface 171. The half mirror 163 is provided on the inclined surface 172. The surfaces of each of the half mirrors 162 and 163 form approximately 45 degrees with each of the axes AX1 and AX2 when viewed along the X direction, are inclined with respect to the XY plane and the XZ plane, and as they move in the +Z direction, -Move in the Y direction. As shown in FIG. 4, the -Y side end of the half mirror 162 is at approximately the same position in the Y direction as the +Y side end of the half mirror 161. - It is placed on the Y side. The +Y side end of the half mirror 163 is located at approximately the same position in the Y direction as the -Y side end of the half mirror 161, and more specifically, it is located at a position slightly on the +Y side from the -Y side end of the half mirror 161. has been done. The shape and size of half mirrors 162 and 163 are similar to half mirror 161. When viewed along the Z direction, the half mirrors 162 and 163 are connected to the half mirror 161 in the Y direction, and the size of the overlapping half mirrors 161 to 163 is equal to or larger than the objective lens 250. reasonably small.

Although the half mirrors 162 and 163 may be made of metal such as silver, like the half mirror 161, they are preferably made of a dielectric multilayer film. However, the reflectance of the image light of the half mirror 162 is lower than that of the half mirror 161. The reflectance of the image light of the half mirror 163 is higher than that of the half mirror 161. That is, the reflectance of the half mirrors 162, 161, and 163 to the image light is sequentially higher. For example, if the reflectance of the half mirror 161 to the image light is 30%, the reflectance of the half mirror 162 to the image light is about 20%, and the reflectance of the half mirror 162 to the image light is about 40%. .

In the optical display device 102, when the display unit 11 is attached to the image side end of the lens barrel 212 of the binoculars 201, the image light emitted from the display surface 52 of the display element 50 of the display unit 11 is transmitted through the lens. 55, the light becomes substantially parallel light and enters the light guide member 121 from the upper surface 122. Of the image light incident on the light guide member 121, the image light incident on the side surfaces 124 to 127 at an incident angle exceeding the critical angle is totally reflected by the side surfaces 124 to 127, and is reflected by the half mirror (second half mirror) 162. is incident from the +Y side. Of the image light incident on the half mirror 162, a portion of the image light according to the reflectance is reflected by the half mirror 162, passes through the side surface 124 of the light guide member 121, and becomes observation light that enters the objective lens 250 from the object. superimposed on At least a portion of the remaining image light that has entered the half mirror 162 passes through the half mirror 162 and enters the half mirror 161 from the +Y side.

Of the image light incident on the half mirror 161, a portion of the image light according to the reflectance is reflected by the half mirror 161, passes through the side surface 124 of the light guide member 121, and becomes observation light that enters the objective lens 250 from the object. superimposed on At least a portion of the remaining image light that has entered the half mirror 161 passes through the half mirror 161 and enters the half mirror 163 from the +Y side. Of the image light incident on the half mirror 163, a portion of the image light according to the reflectance is reflected by the half mirror 163, passes through the side surface 124 of the light guide member 121, and becomes observation light that enters the objective lens 250 from the object. superimposed on At least a portion of the remaining image light incident on the half mirror 163 is transmitted through the half mirror 163.

The inclined surfaces 171 and 172 of the light guide member 121 are surfaces that emit image light by providing half mirrors 162 and 163 on the surfaces, and are arranged on the axis AX1 of the lens group 222. Here, being placed on the axis AX1 includes being placed on an axis that is parallel to the axis AX1 passing through the inclined surface 128 and the half mirror 161 and passing through the objective lens 250. The inclined surfaces 171 and 172 are formed on the emitting portion 141 of the optical member 111 along with the inclined surface 128 and a part of the side surface 124.

The three image lights that entered the objective lens 250 from the half mirrors 161 to 163 travel along optical paths parallel to the observation light, are erected into images by prisms 261 and 262, and focused on the retina of the left eye EL by the eyepiece 270. image and is visible to the observer.

In the optical display device 102, a half mirror (first half mirror) 161 is provided on the inclined surface 128 of the light guide member 121 forming the emission section 141. The half mirror 161 reflects and emits the image light guided by the side surfaces 124 to 127 of the light guide member 121 forming the light guide section 151, and is arranged on the axis AX1. The emission section 141 is provided with a half mirror (second half mirror) 162 that is disposed on the inclined surface 171 and is different from the half mirror 161. Half mirror 162 extends along the direction in which half mirror 161 extends. According to the optical display device 102, by using a plurality of half mirrors 161 and 162, the areas of image light reflected by each half mirror can be shifted from each other within the XY plane, and the viewing range, the so-called eye box, can be expanded. . As a result, it is not necessary to increase the NA of the lens 55, and high image quality can be achieved over the entire viewing range.

Furthermore, in the optical display device 102, the emission section 141 is provided with a half mirror 163 that is disposed on the inclined surface 172 and is different from the half mirrors 161 and 162. The number of half mirrors provided in the emission section 141 is not particularly limited. In the optical display device 102, as described above, if the plurality of half mirrors are parallel to each other when viewed along the X direction, and when viewed along the Z direction, the plurality of half mirrors are connected in the Y direction. , the viewing area can be expanded depending on the number and size of half mirrors.

In the optical display device 102, the distance from the half mirror 161 to the top surface 122 of the light guide member 121 on the axis AX2 is longer than the distance from the coaxial half mirror 162 to the top surface 122. In other words, the half mirror 162 is arranged on the +Y side, that is, above the half mirror 161. In the optical display device 102, the reflectance of the half mirror 161 to image light is higher than the reflectance of the half mirror 162 to image light. This makes it possible to suppress unevenness in image brightness. Note that if the reflectances of the plurality of half mirrors for the image light are approximately equal to each other, the reflected light from the half mirror disposed on the side closer to the lens 55 on the axis AX2 will be disposed on the side farther from the lens 55. Since the light is brighter than the reflected light from the half mirror, uneven brightness occurs in the image. Therefore, the reflectance of the plurality of half mirrors for the image light is determined by the relative light amount ratio of the image light incident on each half mirror so that the amounts of the image light reflected by the plurality of half mirrors are approximately equal to each other. It is preferable that it is adjusted and designed accordingly.

[Third embodiment]
Next, a third embodiment of the present invention will be described using FIG. 5. FIG. 5 is a schematic diagram showing the configuration of the optical display device 103 of the third embodiment when viewed from a direction corresponding to direction D shown in FIG. As shown in FIG. 5, the optical display device 104 of the third embodiment includes binoculars 201 and the display unit 13 of the third embodiment.

The display unit 13 includes a mounting member 22, a housing 31, a display element 50, a lens 55, and an optical member 113.

The attachment member 22 is a member that is attached to the image side end of the lens barrel 212 of the binoculars 201 from the image side, that is, from the +Z side, and is detachable from the lens barrel 212. The configuration and shape of the attachment member 22 are not particularly limited as long as it can be attached to and detached from the image-side end of the lens barrel 212. The attachment member 22 is, for example, a member that can lock the image-side end of the lens barrel 212 from the outside in the radial direction. When viewed along the Z direction, the attachment member 22 does not overlap at least the optical path of the observation light after passing through the eyepiece 270.

The housing 31 further includes a protruding wall portion 38. The protruding wall portion 38 protrudes from the center and lower portions of the housing 31 toward the -Z side. That is, when viewed along the X direction, the housing 31 is formed in an inverted L shape. A display element 50 and a lens 55 are arranged in the internal space 40 of the protruding wall portion 38 .

The optical member 113 includes a light guide member 121 , a half mirror (first half mirror) 161 , a half mirror (second half mirror) 162 , a half mirror 163 , and a mirror 164 . The light guide member 121 is a member formed in the shape of a rectangular parallelepiped, and includes a top surface 122, a bottom surface 123, side surfaces 124, 125, 126, and 127, and inclined surfaces 128, 171, 172, and 174. That is, the light guide member 121 of the third embodiment further includes an inclined surface 174 in addition to the structure of the light guide member 121 of the second embodiment. The size of the light guide member 121 in the X direction is larger than the size in the Z direction similarly to the second embodiment, and is appropriately larger than the size of the objective lens 250 in the X direction. Further, the size of the light guiding member 121 and the housing 31 in the Z direction is appropriately designed in consideration of the size necessary for forming the inclined surfaces 128, 171, 172, 174 and the light guiding portion 151 of the optical member 113. Ru.

The inclined surface (incidence part) 174 is arranged at least at a position on the +Y side of the inclined surface 128 in the light guide member 121, and specifically, it is arranged at the upper part of the light guide member 121 on the +Y side of the inclined surface 171. There is. The upper part means a portion located above the eyepieces 270 at an appropriate distance when the display unit 14 is attached to the binoculars 201 as described later. The above-mentioned appropriate distance means a distance that can appropriately ensure the size of the light guide section 151 of the light guide member 121 of the optical member 113 in the Z direction. The inclined surface 174 is parallel to the inclined surface 128 and extends along the direction in which the inclined surface 128 extends. The upper part of the light guide member 121 is included in the internal space 40 of the protruding wall part 38 in the Y direction.

The mirror 164 is provided on the inclined surface 174. The surface of the mirror 164 makes approximately 45 degrees with each of the axes AX1 and AX2 when viewed along the X direction, is inclined with respect to the XY plane and the XZ plane, and moves in the -Y direction as it moves in the +Z direction. do. The shape and size of mirror 164 are similar to half mirror 161. Like the half mirror 161, the mirror 164 may be made of metal such as silver, but is preferably made of a dielectric multilayer film. The reflectance of the image light of the mirror 164 is, for example, 90% or more, and preferably approximately 100%.

In the display unit 13, the display element 50 is arranged in the internal section 40 on the −Z side of the protruding wall portion 38 of the housing 31. The display surface 52 of the display element 50 is arranged parallel to the XY plane and faces above the side surface 126 of the light guide member 121. Image light from the display surface 52 is emitted in the +Z direction. The lens 55 is arranged at an appropriate position between the display surface 52 of the display element 50 and the mirror 164 in the Z direction. An axis AX2 passing through the centers of the display surface 52, lens 55, and mirror 164 in the X and Y directions is parallel to the X direction.

In the third embodiment, the display unit 13 is attached to the +Z side end of the lens barrel 212 of the binoculars 201 together with the mounting member 22 . In the attached state, the emitting portion 141 of the optical member 113 is arranged on the axis AX1 of the lens group 222, and is arranged between the eyepiece 270 and the left eye EL of the observer on the axis AX1. The exit portion 141 of the optical member 113 is arranged to overlap the maximum area of the eyepiece 270 when viewed along the axis AX2 between the prism 261 of the lens group 222 and the eyepiece 270.

In the optical display device 103, when the display unit 13 is attached to the binoculars 201, the image light emitted from the display surface 52 of the display element 50 of the display unit 13 travels in the +Z direction along the axis AX2 and passes through the lens. 55 and become parallel light. The parallel image light enters the light guide member 121 from the upper side surface 126 of the light guide member 121 and then enters the mirror 164 . Therefore, the upper part of the light guide member 121 including the inclined surface 174 in the Z direction constitutes the entrance part 131 of the optical member 113 into which the image light emitted from the display surface 52 of the display element 50 and passed through the lens 55 is incident.

The image light incident on the mirror 164 is reflected in the −Y direction along the axis AX2 and guided toward the half mirrors 162, 161, and 163. That is, the mirror (first reflecting member) 164 (incidence section 131) reflects the image light emitted from the display element 50 toward the light guide section 151 of the optical member 113. At least a portion of the image light reflected by the mirror 164 is incident on the side surfaces 124 to 127 at an incident angle exceeding the critical angle, is totally reflected on the side surfaces 124 to 127, and is directed toward the half mirrors 162, 161, 163. light is guided. Of the image light incident on each of the half mirrors 162, 161, 163, a portion of the image light according to the respective reflectance is reflected by each of the half mirrors 162, 161, 163, and passes through the eyepiece lens 270. It is superimposed on the observation light incident on the left eye EL of the observer.

When the display unit 13 is attached to the binoculars 201, the eyepiece 270 is disposed between the objective lens 250 and the exit portion 141 of the optical member 113 on the axis AX1. The distance from the exit section 141 to the objective lens 250 on the axis AX1 is longer than the distance from the mirror 164 of the entrance section 131 of the optical member 113 to the display surface 52 of the display element 50 on the axis AX2. Due to this relative arrangement, in the optical display device 103, even if the display magnification is variable in the binoculars 201 and the viewer arbitrarily changes the display magnification, the magnification of the image does not change and the image Visibility is maintained. On the other hand, in the optical display device 101, when the observer arbitrarily changes the display magnification of the binoculars 201, the magnification of the image also changes.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described using FIGS. 6 and 7. Although not shown, the optical display device of the fourth embodiment includes binoculars 201 and the display unit of the fourth embodiment.

The display unit of the fourth embodiment includes a mounting member 21, a housing 31, a display element 50, a lens 55, and an optical member 114 of the fourth embodiment. FIG. 6 shows the display element 50, lens 55, and optical member 114 housed in the casing 31 of the display unit of the fourth embodiment, when viewed from a direction corresponding to direction D shown in FIG. FIG. 2 is a schematic diagram showing the configuration. FIG. 7 is a schematic diagram of the optical member 114 viewed from the +Z side. As shown in FIGS. 6 and 7, the optical member 114 includes a plurality of micromirrors 165 in place of each of the half mirrors 161, 162, and 163 of the optical member 112 of the second embodiment.

The plurality of micromirrors 165 are provided on each of the inclined surfaces 128, 171, and 172 at intervals in the X direction. For example, the micromirror 165 provided on the inclined surface 171, 172 is located at an intermediate position between two micromirrors 165, 165 provided on the inclined surface 128 and adjacent to each other in the X direction, or at an angle with respect to the intermediate position in the X direction. The micromirror 165 is disposed on the surface 128 at a position opposite to the nearest micromirror 165 in the X direction. Note that it is preferable that the micromirror 165 be provided in a region where the light intensity is strong also on the inclined surfaces 128, 171, and 172 to which the image light is irradiated. This improves the transmittance of observation light in the optical display device of the fourth embodiment.

The micromirror 165 has a circular shape in plan view, and is also called a so-called pin mirror. The diameter of the micromirror 165 is approximately 1 mm. The diameters of the plurality of micromirrors 165 may vary depending on the arrangement. The reflectance of the micromirror 165 for image light is close to 100%, for example, 90% or more. The micromirror 165 may be made of a metal such as silver, or a dielectric multilayer film or a synthetic resin such as plastic. The micromirror 165 may be formed by, for example, dividing the light guiding member 121 in the middle approximately at the center in the Z direction, and protruding and exposing the inclined surfaces 128, 171, 172 from the −Z side member toward the +Z side. , 171 and 172, the material of the micromirror 165 may be provided by lamination or injection molding.

The behavior of the observation light and the image light in the optical display device of the fourth embodiment is generally similar to that of the optical display device 102 of the second embodiment. However, in the optical display device of the fourth embodiment, the inclined surface 128 of the emission part 141 of the light guide member 121 has a plurality of micromirrors 165 that emit the image light guided by the light guide part 151. A group MM is provided. A first micromirror group M1 having a plurality of micromirrors 165 from which the image light guided by the light guide 151 is emitted is provided on the inclined surface 171 of the emission section 141 of the light guide member 121 . A second micromirror group M2 having a plurality of micromirrors 165 from which the image light guided by the light guide section 151 is emitted is provided on the inclined surface 172 of the emission section 141 of the light guide member 121 . The second micromirror group M2 is arranged at a different position from the first micromirror group M1. In each of the micromirror group MM, the first micromirror group M1, and the second micromirror group M2, a plurality of micromirrors 165 are arranged at intervals in the X direction (second direction).

In the optical display device of the fourth embodiment, the shape of the micromirror 165 when viewed from the direction perpendicular to the surface of the micromirror 165 is circular, and the diameter of the micromirror 165 is about 1 mm, so that the viewer's left eye EL The image light incident on the lens becomes a thin line, creating a free focus effect. If a plurality of micromirrors 165 are arranged in the micromirror group MM, the first micromirror group M1, and the second micromirror group M2, the free focusing property is lost, but as described above, the focus is only on positions where the intensity of the image light is strong. By arranging the micromirror 165, bright dots of image light can be visually recognized, and the transmittance of observation light can be increased.

In the optical display device of the fourth embodiment, the plurality of micromirrors 165 may be provided only on any one of the inclined surfaces 128, 171, and 172.

[Fifth embodiment]
Next, a fifth embodiment of the present invention will be described using FIGS. 8 and 9. Although not shown, the optical display device of the fifth embodiment includes binoculars 201 and the display unit of the fifth embodiment.

The display unit of the fifth embodiment includes a mounting member 21, a housing 31, a display element 50, and an optical member 115 of the fifth embodiment. FIG. 8 schematically shows the configuration of the display element 50 and the optical member 115 housed in the casing 31 of the display unit of the fifth embodiment when viewed from a direction corresponding to direction D shown in FIG. It is a diagram. FIG. 9 is a schematic diagram of the optical member 115 viewed from the +Z side.

As shown in FIGS. 8 and 9, like the optical member 114 of the fourth embodiment, the optical member 115 includes micromirrors instead of each of the half mirrors 161, 162, and 163 of the optical member 112 of the second embodiment. It includes a plurality of micromirrors 165 in a group MM, a first micromirror group M1, and a second micromirror group M2, and further includes a curved mirror 166. The light guiding member 121 of the optical member 115 includes a top surface 122, a bottom surface 123, side surfaces 124 to 127, inclined surfaces 128, 171, 172, and a curved surface 176. That is, the light guide member 121 of the fifth embodiment further includes a curved surface 176 in addition to the configuration of the light guide member 121 of the second embodiment.

However, in the light guide member 121 of the fifth embodiment, the inclined surfaces 128, 171, and 172 are aligned with each of the axes AX1 and AX2 from an object (not shown) to the objective lens 250 when viewed along the X direction. It forms approximately 45 degrees and is inclined with respect to the XY plane and the XZ plane, but as it moves in the +Z direction, it moves in the +Y direction. Like the inclined surfaces 128, 171, and 172, the surface of the micromirror 165 is inclined with respect to the XY plane and the XZ plane, and moves in the +Y direction as it moves in the +Z direction. The transmittance of the micromirror 165 for image light is preferably 30% or more, for example.

The curved surface 176 is formed in the light guide member 121 at least at a position on the −Y side relative to the inclined surface 128, and specifically, at a position further on the −Y side than the inclined surface 172. The curved surface 176 is curved so as to protrude toward the −Y side as it approaches the center in the Z direction. The curved mirror 166 is provided on the curved surface 176. The surface of the curved mirror 166 is curved so as to protrude toward the −Y side as it approaches the center in the Z direction. The curved mirror 166 may be made of metal such as silver, or may be made of a dielectric multilayer film. The reflectance of the image light of the curved mirror 166 is, for example, 90% or more, and preferably approximately 100%.

In the optical display device of the fifth embodiment, when the display unit 11 is attached to the image-side end of the lens barrel 212 of the binoculars 201, the image emitted from the display surface 52 of the display element 50 of the display unit 11 is The light enters the light guide member 121 from the upper surface 122 in the form of diffused light. Of the image light incident on the light guide member 121 , the image light incident on the side surfaces 124 to 127 at an incident angle exceeding the critical angle is totally reflected by the side surfaces 124 to 127 in the −Y side and heads toward the curved surface 176 . . A portion of the image light incident on the light guide member 121 passes through the micromirrors 165 provided on the inclined surfaces 171, 128, and 172 in sequence, and heads toward the curved surface 176. The image light directed toward the curved surface 176 is reflected by the curved mirror 166 toward the minute mirrors 165 provided on the inclined surfaces 172, 128, and 171, and becomes approximately parallel light. That is, in the optical display device of the fifth embodiment, the curved mirror (second reflecting member) 166 provided on the curved surface 176 includes a plurality of micromirror groups MM, first micromirror group M1, and second micromirror group M2. The image light transmitted through the micromirror (first half mirror) 165 is reflected toward a plurality of micromirrors 165 provided in the emission section 141. The curved surface 176 constitutes the emitting portion 141 in the optical member 115. The emission section 141 of the optical member 115 includes a curved mirror 166.

Of the image light incident on the micromirrors 165 provided on the inclined surfaces 172, 128, 171, a portion of the image light according to the reflectance is reflected by the micromirrors 165 and passes through the side surface 124 of the light guide member 121. , is superimposed on the observation light incident on the objective lens 250 from the object.

According to the display unit and optical display device of the fifth embodiment, there is no need to use a lens for converting the image light emitted from the display surface 52 of the display element 50 into parallel light, so that the size and weight can be reduced. be able to.

[Sixth embodiment]
Next, a sixth embodiment of the present invention will be described using FIGS. 10 and 11. Although not shown, the optical display device of the sixth embodiment includes binoculars 201 and the display unit of the sixth embodiment.

The display unit of the sixth embodiment includes a mounting member 21, a housing 31, a display element 50, a lens 55, and an optical member 116 of the sixth embodiment. FIG. 10 shows a display element 50, a lens 55, and an optical member 116 housed in a housing 31 of a display unit according to the sixth embodiment, when viewed from a direction corresponding to direction D shown in FIG. FIG. 2 is a schematic diagram showing the configuration. FIG. 11 is a schematic diagram of the optical member 116 viewed from the +Z side.

As shown in FIGS. 10 and 11, the optical member 116 includes the first micromirror group M1 and the second micromirror group described in the fourth embodiment, instead of each of the half mirrors 162 and 163 of the optical member 112 of the second embodiment. A plurality of micromirrors 165 of a micromirror group M2 are provided. In other words, the optical member 116 includes the half mirror 161 described in the second embodiment in place of the micromirror group MM of the optical member 114 in the fourth embodiment. Therefore, the half mirror (third reflecting member) 161 has a first micromirror group M1 provided on the inclined surface 171 and a second micromirror group M2 provided on the inclined surface 172 in the Y direction (first direction). placed in between. The half mirror (third reflecting member) 161 extends in the X direction (second direction) in which the micromirrors 165 of the first micromirror group M1 are arranged side by side.

The optical display device of the sixth embodiment is generally similar to the optical display device of the fourth embodiment. However, in the optical display device of the sixth embodiment, the image light that has been made into parallel light by the lens 55 enters the light guide member 121 from the top surface 122, and a portion of the image light passes through the side surfaces 124 to 127 (light guide section 151). It is totally reflected by the beam and travels in the -Y direction. A part of the image light guided by the light guiding section 151 is reflected as a thin line by the micromirror 165 of the first micromirror group M1, and is superimposed on the observation light incident on the objective lens 250. A portion of the image light guided by the light guiding section 151 and passing between the plurality of micromirrors 165 of the first micromirror group M1 is caused to correspond to the inclined surface 128 by the half mirror 161 as in the second embodiment. It is reflected entirely within the XY plane and is superimposed on the observation light incident on the objective lens 250. A part of the image light transmitted through the half mirror 161 in the −X direction is reflected as a thin line by the micromirror 165 of the second micromirror group M2, and is superimposed on the observation light incident on the objective lens 250.

According to the optical display device of the sixth embodiment, the image light reflected by each of the group of multiple micromirrors 165 discretely arranged at intervals in the X direction and the half mirror 161 extending in the X direction. The viewing range can be adjusted by taking advantage of the behavior of

[Seventh embodiment]
Next, a seventh embodiment of the present invention will be described using FIGS. 12 to 15. Although not shown, the optical display device of the seventh embodiment includes binoculars 201 and the display unit of the seventh embodiment.

The display unit of the seventh embodiment includes a mounting member 21, a housing 31, a display element 50, a lens 55, and an optical member 117 of the seventh embodiment. FIG. 12 shows a display element 50, a lens 55, and an optical member 117 housed in a housing 31 of a display unit according to the seventh embodiment, when viewed from a direction corresponding to direction D shown in FIG. FIG. 2 is a schematic diagram showing the configuration. FIG. 13 is a schematic diagram of the optical member 117 viewed from the +Z side.

In the display unit of the seventh embodiment, the housing 31 further includes a protruding wall portion (not shown). The protruding wall portion protrudes from the center and lower portions of the housing 31 toward the +Z side. That is, when viewed along the X direction, the casing 31 is formed in an inverted L-shape, and the casing 31 of the third embodiment is reversed from front to back. A display element 50 and a lens 55 are arranged in the internal space 40 of the protruding wall.

The display surface 52 of the display element 50 is arranged parallel to the XY plane and faces above the side surface 124 of the light guide member 121. Image light from the display surface 52 is emitted in the −Z direction. The lens 55 is arranged at an appropriate position between the display surface 52 of the display element 50 and the side surface 124 of the light guide member 121 in the Z direction.

The optical member 117 includes a light guide member 121, a diffraction element (first diffraction element) 401, and a diffraction element (second diffraction element) 402. The light guide member 121 includes a top surface 122, a bottom surface 123, and side surfaces 124, 125, 126, and 127. The diffraction element 401 is provided at the upper part of the side surface 126 in a region where the image light incident on the light guide member 121 from the side surface 124 hits, as will be described later. The diffraction grating 405 of the diffraction element 401, that is, the periodic structure, extends in the X direction (second direction). The diffraction element 402 is provided at the lower part of the side surface 126 in a region where image light that is diffracted by the diffraction element 401 and itself and totally reflected at the side surface 124 hits, as will be described later.

In the optical display device of the seventh embodiment, when the display unit of the seventh embodiment is attached to the binoculars 201, the image light emitted from the display surface 52 of the display element 50 is directed in the -Z direction along the axis AX2. The light then passes through the lens 55 and becomes parallel light. The parallel image light enters the light guide member 121 from the upper side surface 124 of the light guide member 121 and enters the diffraction element 401 . Therefore, in the Z direction, the upper part of the light guide member 121 including the diffraction element 401 constitutes the entrance part 131 of the optical member 113 into which the image light emitted from the display surface 52 of the display element 50 and passed through the lens 55 is incident.

Of the image light incident on the diffraction element 401, the primary light component is diffracted in the Y direction (first direction) at an angle corresponding to the size or pitch of the diffraction grating 405 in the Z direction. The light propagates in a direction inclined to the direction, is totally reflected by the side surface 124, and is guided in the -Y direction. At least a portion of the image light guided in the -Y direction is incident on the diffraction element 402. Of the image light incident on the diffraction element 402, the primary light component is diffracted in a direction parallel to the +Z direction at an angle corresponding to the size in the Z direction, that is, the pitch, of the diffraction element 402, and enters the objective lens 250. Superimposed on the observation light. Therefore, in the Z direction, the lower part of the light guide member 121 including the diffraction element 402 emits the image light and is arranged on the axis AX1 of the lens group 222 between the object and the objective lens 250, which are omitted in FIG. This constitutes the emitting section 141 of the optical member 113.

As described above, in the optical display device of the seventh embodiment, the diffraction element 401 is provided at the entrance portion 131 of the optical member 117. A diffraction element 402 is provided at the exit portion 141 of the optical member 117 . According to the optical display device of the seventh embodiment, it is possible to expand the viewing range of the image light in the Z direction, that is, in the vertical direction of the viewer.

FIG. 14 is a schematic diagram of the optical member 118 of the first modification of the seventh embodiment when viewed from the +Z side. As shown in FIG. 14, the optical member 118 includes two diffraction elements (first diffraction element) 401A and a diffraction element (third diffraction element) 401B instead of the above-described diffraction element 401. The diffraction element 401A is formed in the upper part of the side surface 126 of the light guide member 121 and in the −X side region. The shape of the diffraction element 401A viewed from the Z direction is circular. The diffraction element 401B is formed in the upper part of the side surface 126 and in a region on the +X side of the diffraction element 401A. The shape of the diffraction element 401B viewed from the Z direction is trapezoidal. The upper end of the diffraction element 401B is parallel to the X direction. The lower end of the diffraction element 401B moves in the -Y direction as it moves in the +X direction. The side ends of the diffraction element 401B are parallel to each other and parallel to the Y direction.

Although not shown, each diffraction grating of the diffraction elements 401A and 401B extends at least in a direction different from the X direction. For example, the diffraction grating of the diffraction element 401A is substantially parallel to the Y direction. For example, the diffraction grating of the diffraction element 401B is substantially parallel to directions inclined in the +X direction and the -Y direction. The pitch and extending direction of the diffraction grating are appropriately designed so that the k vector of the image light satisfies a predetermined condition and the image light diffracted by the diffraction elements 401A and 401B is diffused in the X direction.

In the optical display device including the optical member 118 of the first modification of the seventh embodiment, the image light that enters the light guide member 121 from the upper side surface 124 of the light guide member 121 enters the diffraction element 401A. Of the image light incident on the diffraction element 401A, the first-order light component is diffracted in the -X direction at an angle corresponding to the pitch of the diffraction grating of the diffraction element 401A, totally reflected on the side surface 124, and incident on the diffraction element 401B. do. Of the image light incident on the diffraction element 401B, the first-order light component is diffracted approximately in the -Y direction at an angle corresponding to the pitch of the diffraction grating of the diffraction element 401B, is totally reflected on the side surface 124, and is completely reflected on the side surface 124. 2 diffraction element) 402. Similarly to the seventh embodiment, the first-order light component of the image light incident on the diffraction element 402 is diffracted in a direction parallel to the +Z direction at an angle corresponding to the pitch of the diffraction grating 406 in the Z direction. It is superimposed on the observation light incident on the lens 250.

In the optical display device of the second modification of the seventh embodiment, the diffraction grating of the diffraction element (first diffraction element) 401A is arranged in the Y direction (second direction) intersecting the X direction (first direction) in which image light is diffracted, for example. ). The diffraction grating of the diffraction element (third diffraction element) 401B extends in a direction different from the Y direction, and diffracts the image light toward the diffraction element 402. The light guiding portion 151 of the optical member 118 is provided with a diffraction element 401B that diffracts the image light diffracted by the diffraction element 401A toward a diffraction element (second diffraction element) 402. According to the optical display device of the second modification of the seventh embodiment, it is possible to expand the visual range of the image light in the Y direction and the X direction, that is, in both the vertical and horizontal directions of the viewer.

FIG. 15 shows a display element 50, a lens 55, and an optical member 119 housed in a housing 31 of a display unit according to a second modification of the seventh embodiment in a direction corresponding to the D direction shown in FIG. FIG. 2 is a schematic diagram showing the configuration when viewed from above. Optical member 119 includes a lens 59 in addition to the configuration of optical member 117 . The lens 59 is provided in a region including the diffraction element 402 when viewed along the axis AX1 and at the lower part of the side surface 124, which is the exit portion 141 of the optical member 119.

In the optical display device of the second modification of the seventh embodiment, the side surface 126 on which the diffraction element (first diffraction element) 401A and the diffraction element (third diffraction element) 401B are provided in the emission part 141 of the optical member 119; has a curvature on the opposite side surface 124 in the Z direction. Therefore, on the exit surface of the exit section 141 in the optical member 119, that is, the side surface 124, the lens 59 can give an action to the image light by a gently curved surface corresponding to the above-mentioned curvature. Basically, since the image light incident on the left eye EL of the observer comes from a plurality of positions, the image light guided inside the light guide member 121 is substantially parallel light. However, although the observer using the binoculars 201 sees the above-mentioned substantially parallel light, he does not see an object at infinity. Therefore, a difference in focal length occurs between the observation light and the image light. According to the optical display device of the modification of the seventh embodiment, the focal position of the observation light and the focal position of the image light of the binoculars 201 can be adjusted by the lens 59.

The diffraction elements 401, 401A, 401B, and 402 are, for example, nanoimprints, volume holograms, or liquid crystal holograms. Note that since the diffraction of the image light by the diffraction elements 401, 401A, 401B, and 402 has strong wavelength dependence, the image light must be monochromatic light equivalent to the design wavelength of the diffraction elements 401, 401A, 401B, and 402. preferable. From the viewpoint of increasing visibility of the image light, it is preferable that the image light is green.

[Eighth embodiment]
Next, an eighth embodiment of the present invention will be described using FIG. 16. Although not shown, the optical display device of the eighth embodiment includes binoculars 201 and the display unit of the eighth embodiment. The display unit of the eighth embodiment includes a mounting member 21, a housing 31, a display element 50, and an optical member 120 of the eighth embodiment. FIG. 16 schematically shows the configuration of the display element 50 and the optical member 119 housed in the casing 31 of the display unit of the eighth embodiment, when viewed from a direction corresponding to direction D shown in FIG. It is a diagram.

As shown in FIG. 16, the optical member 119 includes a light guide member 121, a prism 501, and a diffraction element (first diffraction element) 405. The prism 501 is provided on the upper surface 122 (incidence part 131) of the light guide member 121. The prism 501 has a substantially isosceles triangular shape when viewed along the X direction, and has equilateral surfaces 501a, 501b and a base surface 501c. The equilateral surface 501a of the prism 501 faces the display surface 52 of the display element 50. The equilateral surface 501b of the prism 501 is in contact with the upper surface 122 of the light guide member 121. The diffraction element 405 is provided on the inclined surface 128 of the light guide member 121. The diffraction grating of the diffraction element 405 extends in the X direction (first direction).

In the optical display device of the eighth embodiment, the image light emitted from the display surface 52 of the display element 50 enters the prism 501 from the equilateral surface 501a of the prism 501, is refracted by the equilateral surface 501a, and is completely refracted by the base surface 501c. reflected. The image light totally reflected by the bottom surface 501c is refracted by the equilateral surface 501b, enters the light guide member 121 from the top surface 122, is totally reflected by the side surfaces 124 to 127, and enters the diffraction element 405. Of the image light incident on the diffraction element 405, the primary light component is diffracted in a direction parallel to the +Z direction at an angle corresponding to the size in the Z direction, that is, the pitch, of the diffraction element 405, and enters the objective lens 250. Superimposed on the observation light.

According to the optical display device of the eighth embodiment, since the prism 501 is provided at the entrance portion 131 of the optical member 119, the dispersion characteristic of the diffraction element 405 is changed to that of the prism 501 having the dispersion characteristic opposite to that of the diffraction element 405. It is possible to cancel the color unevenness of the image light and suppress the occurrence of color unevenness in the image light.

As the diffraction elements 401, 401A, 401B, 402 in the seventh embodiment and the diffraction element 405 in the eighth embodiment, a diffraction grating is exemplified above, but nanoimprints, volume holograms, metalens, etc. may also be used.

[Other embodiments]
Next, other embodiments of the present invention will be described using FIGS. 17 and 18. FIG. 17 is a schematic diagram of an example of mounting the display element 50 and optical member 115 illustrated in FIG. 8. FIG. 18 is a schematic diagram of a modification example of the display element 50, prism 502, and optical member 112 illustrated in FIGS. 3 and 4. As shown in FIGS. 17 and 18, the shape of the light guide member 121 of the optical member according to the present invention including the optical members 112 and 115 is the same as the shape of the light guide member 121 when viewed along the axis AX1 between the object to be observed and the objective lens 250. It may also be circular. Although the thickness is slightly emphasized in FIGS. 17 and 18, the light guide member 121 may be formed of a disc-shaped transparent substrate used in various filters of an imaging device.

For example, in the mounting example shown in FIG. 17, a part of the disc-shaped transparent substrate is cut off to form the upper surface 122 of the light guide member 121 (the incident part 131 of the optical member). The display surface 52 of the display element 50 is approximately in contact with the upper surface 122. The side surface of the disc-shaped transparent substrate facing the upper surface 122 in the Y direction may be bulged toward the −Y side as described in the fifth embodiment, and the curved mirror 166 may be provided. The curved mirror 166 may be embedded between the side surface of the disk-shaped transparent substrate facing the upper surface 122 in the Y direction and the micromirror 165 of the micromirror group MM. A plurality of micromirrors 165 are embedded in the disc-shaped transparent substrate in the relative arrangement described in the fifth embodiment. Note that in FIG. 17, the micromirror 165 of the second micromirror group M2 is omitted.

In the mounting example shown in FIG. 18, the display element 50 may be provided on the plate surface of a disc-shaped transparent substrate corresponding to the side surface 126 of the light guide member 121 via a prism 502 having a light collecting function. A plurality of half mirrors 161 to 163 may be embedded in the disc-shaped transparent substrate in the relative arrangement described in the second embodiment.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications may be made within the scope of the gist of the present invention described within the scope of the claims. Variations and changes are possible. Further, the constituent elements of the plurality of embodiments can be combined as appropriate.

For example, in each of the embodiments described above, binoculars are exemplified as the far-field viewing device of the present invention. However, the far viewing device of the present invention may be a monocular. Further, the distant viewing device of the present invention may be various types of telescopes, various types of microscopes, etc., and broadly includes devices configured for viewing a distant non-observable object from an objective lens.

11, 12, 13, 14... Display unit, 21, 22... Mounting member, 31... Housing (second housing member), 50... Display element, 101-103... Optical display device, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120... Optical member, 201... Binoculars (distant viewing device).

Claims (20)

a mounting member attached to a first housing member that houses a lens group including an objective lens and an eyepiece;
a display element that emits image light;
an entrance part into which the image light emitted from the display element is incident; an exit part which emits the image light and is disposed on the axis of the lens group; an optical member having a light guide section that guides light toward the emission section;
a second housing member that houses the display element and the optical member;
Equipped with
display unit. the objective lens is disposed between the exit section and the eyepiece;
The display unit according to claim 1. The distance from the exit part to the eyepiece is longer than the distance from the entrance part to the display element.
The display unit according to claim 2. the eyepiece lens is disposed between the objective lens and the exit section;
The display unit according to claim 1. The distance from the exit part to the objective lens is longer than the distance from the entrance part to the display element.
The display unit according to claim 4. The emission section is provided with a first half mirror that emits the image light guided by the light guide section and is disposed on the axis.
A display unit according to any one of claims 1 to 5. The emission section is provided with a second reflection member that reflects the image light transmitted through the first half mirror toward the first half mirror.
The display unit according to claim 6. The emission section is provided with a second half mirror that emits the image light guided by the light guide section and is different from the first half mirror,
the second half mirror extends along the direction in which the first half mirror extends;
The display unit according to claim 6. The distance from the first half mirror to the incident section is longer than the distance from the second half mirror to the incident section.
The display unit according to claim 8. The reflectance of the first half mirror is higher than the reflectance of the second half mirror.
The display unit according to claim 8. The incident section is provided with a first reflecting member that reflects the image light emitted from the display element toward the light guide section.
A display unit according to any one of claims 1 to 5. The emission section includes a first micromirror group including a plurality of micromirrors that emit the image light guided by the light guide section, and a first micromirror group that emits the image light guided by the light guide section; A second micromirror group is provided in the optical member, the second micromirror group having a plurality of micromirrors arranged at a different position from the first micromirror group.
A display unit according to any one of claims 1 to 5. The optical member includes a third reflective member,
The third reflecting member is arranged between the first micromirror group and the second micromirror group in the first direction, and the micromirrors of the first micromirror group are arranged side by side and the first extending in a second direction different from the direction;
The display unit according to claim 12. The incident section is provided with a first diffraction element that diffracts the image light emitted by the display element in a first direction,
The emission section is provided with a second diffraction element that emits the image light guided by the light guide section and is disposed on the axis of the lens group.
A display unit according to any one of claims 1 to 5. The diffraction grating of the first diffraction element extends in a second direction intersecting the first direction,
a diffraction grating of the second diffraction element extends in a direction different from the second direction;
The display unit according to claim 14. The light guide section is provided with a third diffraction element that diffracts the image light diffracted by the first diffraction element toward the second diffraction element.
The display unit according to claim 14. In the emission part, a side surface of the optical member opposite to a side surface on which the first diffraction element is provided has a curvature.
The display unit according to claim 14. A prism is provided in the incident part,
A diffraction element that emits the image light guided by the light guide section and is disposed on the axis of the lens group is provided in the emission section.
A display unit according to any one of claims 1 to 5. The optical member has a circular shape when viewed along the axis of the lens group.
A display unit according to any one of claims 1 to 5. A display unit according to any one of claims 1 to 5,
a far viewing device having the lens group;
Equipped with
Optical display device.

Images