JP2009116196A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform object observation at nearly the same magnification by reducing the magnification increase of a video see-through space. <P>SOLUTION: An image display device includes: first and second imaging optical systems (3L, 3R, 4L and 4R) which form external world images on first and second image sensors 5L and 5R respectively; first and second display elements 2L and 2R which display images obtained by the first and second image sensors respectively; and first and second display optical systems 1L and 1R which guide light from the first and second display elements to one eye and the other eye of an observer respectively. The angle of convergence of the imaging optical system and the angle of convergence of the display optical system are equal to each other. The entrance pupils 7L and 7R of the first and second imaging optical systems are arranged in positions closer to an external world than the exit pupils 8L and 8R of the first and second display optical systems. The baseline length e of the first and second imaging systems is larger than the eye width E of the first and second display optical systems. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image display device such as a video see-through HMD (Head Mounted Display) that incorporates a stereoscopic camera and presents an image acquired by the stereoscopic camera to an observer through an optical system.

  An example of the video see-through HMD is disclosed in Patent Document 1. In this video see-through HMD, in order to present an image acquired by a camera to an observer through the display optical system at the same angle of view as the camera, the imaging optical axis of the camera and the observation optical axis of the display optical system are arranged on the same straight line. is doing. In this video see-through HMD, the camera optical system (imaging optical system) is miniaturized by arranging the entrance pupil of the camera at a position closer to the outside (front side) than the exit pupil of the display optical system.

Further, there is a video see-through HMD disclosed in Patent Document 2, for example. In this video see-through HMD, the left camera and the display optical system are integrated with the right camera and the display optical system in the left-right direction while the baseline length of the left and right cameras and the eye width of the left and right display optical systems are the same. It is possible to move to. Thus, the positions of the left and right cameras / display optical systems can be adjusted to match the eye width of each observer.
JP 2001-133725 A Japanese Patent Laid-Open No. 04-22358

  However, when the entrance pupil of the camera is located closer to the outside than the exit pupil of the display optical system as in the video see-through HMD disclosed in Patent Document 1, when imaging and observing a short-distance outside world of 1 m or less. The positional difference (pupil shift amount) between the entrance pupil and the exit pupil cannot be ignored. Specifically, the object in the video see-through space through the image appears larger than the object in the real space according to the shift amount.

This is because the position of the exit pupil of the display optical system substantially coincides with the position of the observer's eye, so that the observer is positioned when the entrance pupil position of the imaging optical system is shifted from the exit pupil position of the display optical system to the outside. This is equivalent to viewing an object in front of the eyes. Table 1 shows the pupil shift amount of the entrance pupil position of the camera with respect to the exit pupil position of the display optical system and the size of the object in the video see-through space (magnification when the size of the object in the real space is 1) β. . For example, when the pupil shift amount d is 30 mm and the distance a to the object in the real space is 300 mm, the size β of the object in the video see-through space is
β = a / (ad)
It becomes 1.11 times.

  When the pupil shift amount d is 30 mm and the distance a to the object in the real space is 500 mm, the size β of the object in the video see-through space is 1.06 times.

  The present invention provides an image display device that reduces the magnification of the video see-through space and enables observation of an object close to the same magnification.

  An image display apparatus according to an aspect of the present invention includes a first imaging element, a second imaging element, a first imaging optical system that forms an external image on each of the first and second imaging elements, and a second imaging element. A first display element and a second display element for displaying images acquired by the two imaging optical systems, and the first and second imaging elements, respectively, and light from the first and second display elements as an observer The first display optical system and the second display optical system lead to one eye and the other eye, respectively. The convergence angles of the first and second imaging optical systems are equal to those of the first and second display optical systems, and the entrance pupils of the first and second imaging optical systems are the first and second It is arranged at a position closer to the outside than the exit pupil of the display optical system. The baseline lengths of the first and second imaging optical systems are larger than the eye width of the first and second display optical systems.

  According to the present invention, in the video see-through space resulting from the fact that the entrance pupils of the first and second imaging optical systems are arranged closer to the outside than the exit pupils of the first and second display optical systems. It is possible to make the observer observe an object close to the same magnification by reducing the magnification of the object.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  First, the basic concept of the embodiment will be described before specific description of the embodiment.

  The image display apparatus according to the embodiment includes left and right imaging elements (first imaging element and second imaging element) and left and right imaging optical systems (first imaging elements) that respectively form external images on the left and right imaging elements. Left and right cameras (imaging systems) configured by the optical system and the second imaging optical system). The left and right cameras are spaced apart by a certain baseline length (variable baseline length as will be described later). Further, the imaging optical axes of the left and right cameras are converging on a reference axis passing through the center between these cameras. In other words, the reference axis coincides with the bisector of the convergence angle of the imaging optical axes of the left and right cameras.

  The apparatus also includes left and right display elements (first display element and second display element) for displaying left and right images acquired by the left and right cameras, respectively. The apparatus further includes left and right display optical systems (first display optical system and second display optical system) that guide light from the left and right display elements to the left and right (one and other) eyes of the observer, respectively. . The left and right display elements are composed of the left and right display elements and the left and right display optical systems. The left and right display optical systems are spaced apart by a certain eye width. The eye width of the display optical system can be adjusted according to the eye width of the observer by the operation of the observer (user).

  The observation optical axes of the left and right display optical systems are converging on the reference axis passing through the center between the display optical systems. In other words, the reference axis also coincides with the bisector of the convergence angle of the observation optical axis of the left and right display optical systems. Furthermore, the bisector of the convergence angle of the imaging optical axis and the bisector of the convergence angle of the observation optical axis are on the same straight line (reference axis). This means that the left and right imaging optical systems (cameras) and the left and right display optical systems (display systems) are arranged in plane symmetry with respect to a plane including the reference axis.

  Here, the convergence angle of the left and right imaging optical systems is equal to the convergence angle of the left and right display optical systems. In addition, the entrance pupils of the left and right imaging optical systems are arranged at a position closer to the outside than the exit pupils of the left and right display optical systems (that is, the front side close to the object).

  The position of the “incidence pupil of the imaging optical system” here refers to the position from the outside of the imaging optical system when the imaging optical system guides incident light from the outside in the horizontal direction and forms an image on the imaging device. It means a position converted into a position on the optical axis (imaging optical axis) of the part that takes in incident light or on its extension line. Moreover, it is good also as a position converted into the position in the direction parallel to the optical axis (observation optical axis) of the part which inject | emits light toward an observer's eyes among display optical systems. In the following description, the distance between the entrance pupils of the left and right imaging optical systems and the exit pupils of the left and right display optical systems is referred to as a pupil shift amount d.

  In the apparatus of the embodiment, when a normal distance object that is not a short-distance object is observed through the apparatus (imaging system / display system), the baseline length e of the left and right cameras (imaging optical system) is set to the left and right. It is set to be the same as the eye width E of the display optical system. In the case of observing a short-distance object through the apparatus, the configuration allows the user operation to make the baseline length of the left and right cameras (imaging optical system) larger than the eye width of the left and right display optical systems. A configuration in which the user can make the baseline length of the left and right cameras (imaging optical system) larger than the eye width of the left and right display optical systems in accordance with the object distance, the pupil displacement amount d, and the like. In addition, in order to be able to deal with an object at a short distance in advance, the base line length e of the left and right cameras (imaging optical system) is set to be a predetermined amount larger than the eye width E of the left and right display optical systems, and the user does not adjust Also good.

  Here, the size of a real object when an object in the real space (hereinafter referred to as a real object) located at a specific distance a from the apparatus is observed without going through the apparatus is 1. Also, let β be the size of the object in the video see-through space observed through the device (imaging system / display system) before the base line length of the left and right cameras is made larger than the eye width of the left and right display optical systems. In this embodiment, by making the baseline length e of the left and right cameras larger than the eye width E of the left and right display optical systems, a magnification α that makes the product of β (that is, the magnification αβ) closer to 1 than β can be obtained. As described above, the user's operation for allowing the baseline length of the left and right cameras to be larger than the eye width of the left and right display optical systems is allowed.

  In other words, the base length of the camera can be changed by the operation of the user (observer) so that e> E. As a result, the video see-through space (left and right on the bisector 9 of the convergence angle) at the time of near-field observation multiplied by β by shifting the entrance pupil of the imaging optical system to the outside of the exit pupil of the display optical system. The coordinate system with the exit pupil position of the display optical system as the origin is compressed by α = E / e times. Thereby, the magnification αβ can be made close to the same magnification (= 1).

  Here, the pupil shift amount d preferably satisfies the following conditions.

d <100mm
When d is 100 mm or more, from Table 1, the ratio of the size of the video see-through space to the size of the real space when the specific distance a is 1.1 m (1100 mm) or less (magnification β) is 1.1 times or more. become. When the specific distance a is 300 mm, β is 1.5 times, and when the specific distance a is 500 mm, β is 1.25 times. Therefore, if the base length e of the left and right cameras is increased to compress the video see-through space, the compression rate is too high, and there is a possibility that the viewer will feel eye fatigue. Furthermore, it is more preferable that d satisfies the following conditions.

20mm ≦ d ≦ 70mm
As can be seen from Table 1, when d is smaller than 20 mm, the entrance pupil position of the camera is much closer to the exit pupil position of the display optical system, and therefore the magnification β during short-distance observation is 1.11 at a = 200 mm. Get smaller. In particular, when a = 300 mm and 500 mm, β <1.07, 1.04 and β are close to 1, and the viewer hardly feels that the magnification of the video see-through space with respect to the real space at the time of short-distance observation is increased. The correction of magnification is no longer necessary. For example, when an observer stretches his / her hand in a video see-through space to perform work or training, an object to be observed is often positioned around 500 mm.

  On the other hand, if d is greater than 70 mm, the magnification (β) of the video see-through space with respect to the real space exceeds 1.15 times when a = 500 mm. In this case, even when the base line length e of the left and right cameras is increased and the video see-through space is compressed, the feeling of compression becomes slightly strong, and there is a possibility that the observer feels eye fatigue.

  Moreover, it is preferable that the specific distance a satisfies the following conditions.

200mm ≦ a ≦ 1100mm
As shown in Table 1, when the specific distance a exceeds 1100 mm, the magnification increase at the specific distance a is almost 1.1 times or less (in particular, 1.05 times or less for a = 300 mm to 500 mm). Become. For this reason, the observer hardly feels an increase in the magnification of the video see-through space relative to the real space, and there is no need to correct the magnification of the video see-through space. Further, since the human eye can focus only up to a short distance of up to 250 mm in the clear vision state, the eye can be focused even if a is less than 200 mm and the magnification of the video see-through space is corrected. It can't be done and it doesn't make sense

  In the examples, it is preferable that the following conditions are satisfied.

0.95 ≦ αβ = a / (ad) × E / e ≦ 1.05
αβ is a video obtained by increasing the magnification β of the video see-through space during near-field observation, which occurs according to the pupil shift amount, and the camera base length so that e> E from the state of e = E. This is the product of the see-through space and the compression ratio α. Within the range of this conditional expression, even if αβ is not 1, the viewer feels that the video see-through space is the same size as the real space. If the lower limit value of the conditional expression is not reached, the viewer can easily feel that the video see-through space is smaller than the real space, and if the upper limit value is exceeded, the observer is likely to feel that the video see-through space is larger than the real space.

  FIG. 1 is a plan view of a video see-through HMD (image display device) as a specific embodiment of the present invention. The left and right display systems are composed of left and right display optical systems 1L and 1R and left and right display elements 2L and 2R. The display elements 2L and 2R are composed of self-luminous elements such as a liquid crystal panel and an organic EL, and display left and right external images acquired using left and right imaging elements described later. The left and right display optical systems 1L and 1R are formed by optical elements such as prisms, and the light from the display elements 2L and 2R incident on the inside through the incident surface formed on the upper surface is utilized by internal reflection. Then, it is guided to the left and right eyes 11L and 11R of the observer. In this way, the left and right display optical systems 1L and 1R present enlarged images of the left and right external images.

  In the video see-through HMD of this embodiment, an eye (not shown) for changing the distance (eye width) E between the left and right display systems in accordance with the eye width of the user (observer) according to the user's operation. A width adjusting mechanism is provided.

  The imaging systems 6L and 6R as the left and right cameras are composed of left and right imaging optical systems including left and right prism elements 3L and 3R and left and right lenses 4L and 4R, and left and right imaging elements 5L and 5R. Each of the prism elements 3L and 3R has a first surface serving as both an incident surface and an inner surface reflecting surface, a second surface serving as an inner surface reflecting surface, and a third surface serving as an exit surface. Is caused to travel in the horizontal direction by internal reflection of the first and second surfaces, and is emitted from the exit surface. Light emitted from the left and right prism elements 3L and 3R forms an image on the left and right imaging elements 5L and 5R, respectively.

  The left and right imaging elements 5L and 5R are composed of photoelectric conversion elements such as a CCD sensor and a CMOS sensor, and photoelectrically convert left and right external images formed on the light receiving surface. Output signals from the image sensors 5L and 5R are input to an image processing circuit (not shown). The image processing circuit generates left and right external images to be displayed on the left and right display elements 2L and 2R based on output signals from the imaging elements 5L and 5R.

  The case where the video see-through HMD of this embodiment is provided with a base length adjustment mechanism (not shown) for changing the distance (base line length) e between the left and right imaging systems 6L and 6R according to the user's operation will be described. To do.

  Here, FIG. 3 shows the appearance of the video see-through HMD of this embodiment. The video see-through HMD is mounted on the head 15 of an observer who is a user so as to wear glasses. In front of the left eye of the observer, the left-eye HMD unit 13L that houses the display systems 1L and 2L and the imaging system 6L (3L to 5L) described above is disposed, and in front of the right eye, the display systems 1R and 1L, A right-eye HMD unit 13R that houses 2R and the imaging system 6R (3R to 5R) is arranged.

  An operation dial 12 that is a part of the baseline length adjustment mechanism is provided on the upper surface of the left-eye HMD portion 13L. When the operation dial 12 is rotated by the observer, the left and right imaging systems 6L and 6R slide in the left and right direction, and the base line length e between the imaging systems 6L and 6R can be changed. The base line length adjustment mechanism sets the base line length e of the imaging systems 6L and 6R to a predetermined upper limit length that is longer (larger) than the eye width from a length that matches the eye width of the display system (display optical systems 1L and 1R). It is configured so that it can be changed in between.

  In FIG. 1, 7L and 7R indicate entrance pupil positions of the left and right imaging optical systems (3L, 4L and 3R, 4R). As described above, these entrance pupil positions are converted into positions on the extension line of the optical axis (imaging optical axis) of the part that captures incident light from the outside (incident surface of the prism elements 3L and 3R) in the imaging optical system. It is shown as

  8L and 8R indicate the exit pupil positions of the left and right display optical systems 1L and 1R. As described above, in this embodiment, the entrance pupil position of the imaging optical system is closer to the outside world by the amount of pupil shift d than the exit pupil position of the display optical systems 1L and 1R.

  Reference numeral 9 denotes a bisector of the convergence angle formed by the left and right imaging optical axes, and a reference axis as a bisector of the convergence angle formed by the left and right observation optical axes.

  Reference numeral 10 denotes a reference point corresponding to the exit pupil position of the left and right display optical systems 1L and 1R on the reference axis, and corresponds to the origin (0, 0, 0) of the video see-through space.

  FIG. 2 is a diagram for explaining a magnification relationship in the video see-through HMD of the present embodiment, and is a plan view similar to FIG. This figure shows a situation in which an actual object (object point) RO existing at a specific distance (short distance) a from the exit pupils 8L and 8R (eyeballs 11L and 11R) of the left and right display systems is imaged by the left and right cameras. Show. In the figure, the left and right cameras are indicated by entrance pupils 7L and 7R, and the left and right display systems are indicated by exit pupils 8L and 8R. The entrance pupils 7L and 7R are set at positions closer to the outside world by the pupil shift amount d than the exit pupils 8L and 8R.

  Left and right RO images are obtained as external images in which the images in the direction of viewing the object point RO from the left and right entrance pupils 7L and 7R are displayed on the display elements 2L and 2R, respectively. By connecting the object point RO and the left and right entrance pupils 7L and 7R with a straight line, an isosceles triangle having the object point RO as a vertex is formed.

  When the left and right RO images obtained by imaging are observed through the display system, the base line length e between the entrance pupils 7L and 7R of the left and right cameras is set as the eye width E between the exit pupils 8L and 8R of the left and right display systems. Set larger. At this time, the convergence angle of the left and right display systems is the same as the convergence angle of the left and right cameras.

  With this setting, when the left and right RO images are observed through the left and right display systems, the image of the object point RO appears at the position of VO. This is because the convergence angle of the display system and the convergence angle of the camera are the same, so that an isosceles triangle formed by an isosceles triangle having the object point RO as a vertex and a straight line connecting the point VO and the exit pupils 8L and 8R. This is because they become similar.

  An isosceles triangle having the point VO as a vertex is E / e times smaller than an isosceles triangle having the object point RO as a vertex. Therefore, when the RO images acquired by the left and right cameras are observed through the display system, the magnification of the video see-through space with the reference point 10 as the origin is compressed by α = E / e times that of the real space. The correction magnification α is set so that αβ, which is the product of α and β, is closer to 1 than β, thereby substantially increasing the magnification (β times) at the specific distance a according to the pupil shift amount d. The video see-through space that is approximately the same size as the real space can be observed.

  Table 2 shows the video see-through space at each distance a (200 mm to 1100 mm) when the pupil shift amount d is 20 mm to 100 mm and the eye width E of the left and right display systems is 63 mm (E1). = 1) shows the base line length e of the left and right cameras. Table 2 also shows an enlargement amount (e-E1) of the base line length e of the camera with respect to the eye width 1.

  For example, the base line length e of a camera in which a = 300 mm, d = 40 mm and αβ = 1 is 72.7 mm, which may be 9.7 mm larger than the eye width E1 of the display system.

  Table 2 also shows left and right cameras that can obtain αβ = 1 when the eye width E of the left and right display systems can be adjusted to match the eye width of each observer (for example, 56 mm to 70 mm). The baseline length e is also shown. E2 shows the case where the eye width of the display system is 56 mm, and E3 shows the case where the eye width is 70 mm.

  For example, when E2 = 56 mm, a = 300 mm, and d = 40 mm, the base line length e of the camera with αβ = 1 is 64.6 mm, which is 8.6 mm (e−E2) larger than the eye width of the display system. That's fine. When E3 = 70 mm, a = 300 mm, and d = 40 mm, the base line length e of the camera with αβ = 1 is 80.8 mm, which is 10.8 mm (e−E3) larger than the eye width of the display system. do it.

  As described above, when the eye width E of the display system can be adjusted, even if the distance a is the same and the pupil displacement amount d is the same, the enlargement amount of the base line length e of the camera necessary to obtain αβ = 1 ( e-E) is different. Therefore, a camera baseline length adjustment mechanism that is independent of the eye width adjustment mechanism of the display system is required.

  For example, when a = 300 mm and d = 40 mm and the eye width adjustment of the display system is possible within a range of 63 mm ± 7 mm, the base line length adjustment range of αβ = 1 is 72.7 mm ± 8.1 mm. Necessary. When a = 300 mm and d = 50 mm and the eye width of the display system can be adjusted in the range of 63 mm ± 7 mm, the camera base length adjustment range where αβ = 1 is 75.6 mm ± 8.4 mm. Necessary.

  If a = 500 mm and d = 40 mm and the eye width of the display system can be adjusted in the range of 63 mm ± 7 mm, the camera base length adjustment range where αβ = 1 is required to be 68.5 mm ± 7.6 mm. It becomes. Furthermore, when a = 500 mm, d = 50 mm, and the eye width adjustment of the display system is possible within the range of 63 mm ± 7 mm, the base line length adjustment range of αβ = 1 is 70.0 mm ± 7.8 mm. .

  Thus, as the pupil shift amount d increases, the base line length adjustment range of the camera with respect to the eye width adjustment range of the display system increases and independence increases.

  Table 3 shows distances a (200 mm to 1100 mm) when the pupil shift amount d is 20 mm to 100 mm and the left and right display system eye widths E are 63 mm (E1), 56 mm (E2), and 70 mm (E3). The base line length e of the left and right cameras with αβ = 0.95 is shown. Table 3 also shows an enlargement amount (e-E) of the base length e of the camera with respect to the eye width E (E1, E2, E3).

  When a = 300 mm, d = 40 mm and the eye width of the display system can be adjusted in the range of 63 mm ± 7 mm, the camera base length adjustment range where αβ = 0.95 is required to be 76.5 mm ± 8.5 mm. is there. In addition, when a = 300 mm and d = 50 mm and the eye width adjustment of the display system is possible in the range of 76.5 mm ± 8.5 mm, the base line length adjustment range of the camera where αβ = 0.95 is 79.6 mm ± 8.9 mm is required.

  When a-500mm, d = 40mm and eye width adjustment of the display system is possible in the range of 63mm ± 7mm, 72.1mm ± 8.0mm is necessary as the base line length adjustment range of αβ = 0.95. is there. In addition, when a = 500 mm and d = 50 mm and the eye width of the display system can be adjusted in the range of 63 mm ± 7 mm, the camera base line length adjustment range in which αβ = 0.95 is 73.7 mm ± 8.2 mm. is necessary.

  Table 4 shows distances a (200 mm to 1100 mm) when the pupil shift amount d is 20 mm to 100 mm and the left and right display system eye widths E are 63 mm (E1), 56 mm (E2), and 70 mm (E3). The base line length e of the left and right cameras with αβ = 1.05 is shown. Table 4 also shows an enlargement amount (e−E) of the base length e of the camera with respect to the eye width E (E1, E2, E3).

  When a-300mm, d = 40mm and eye width adjustment of the display system is possible in the range of 63mm ± 7mm, 69.2mm ± 7.7mm is necessary as the base line length adjustment range of αβ = 1.05. is there. When a-300mm, d = 50mm and eye width adjustment of the display system is possible within the range of 63mm ± 7mm, 72.0mm ± 8.0mm is necessary as the camera base length adjustment range where αβ = 1.05. is there.

  In addition, when a = 500 mm and d = 40 mm and the eye width adjustment of the display system is possible in the range of 63 mm ± 7 mm, the camera base line length adjustment range where αβ = 1.05 is 65.2 mm ± 7.2 mm. is necessary. Furthermore, when a = 500 mm and d = 50 mm and the eye width of the display system can be adjusted within a range of 63 mm ± 7 mm, the camera base length adjustment range where αβ = 1.05 is 66.7 mm ± 7.4 mm. is necessary.

  As explained above, the magnification of the video see-through space that occurs because the entrance pupil of the imaging optical system is located closer to the outside than the exit pupil of the display optical system, the baseline length of the imaging optical system is the eye width of the display optical system It can be canceled by changing it to be larger than that. Therefore, the magnification of the video see-through space can be brought close to the magnification of the real space, and the uncomfortable feeling of the observer who observes the video see-through space can be reduced.

  Each embodiment described above is only a representative example, and various modifications and changes can be made to each embodiment in carrying out the present invention.

The top view which shows the structure of the video see-through HMD which is an Example of this invention. The figure explaining the magnification relationship in the video see-through HMD of an Example. The external view of the video see-through HMD of an Example.

Explanation of symbols

1L, 1R Display optical system 2L, 2R Display element 3L, 3R Prism element 4L, 4R Lens 5L, 5R Imaging element 6L, 6R Imaging system (camera)
7L, 7R Entrance pupil of imaging optical system 8L, 8R Exit pupil of display optical system 11L, 11R Eyeball

Claims (6)

A first image sensor and a second image sensor;
A first imaging optical system and a second imaging optical system for forming external images on the first and second imaging elements, respectively.
A first display element and a second display element for respectively displaying images acquired by the first and second imaging elements;
A first display optical system and a second display optical system for guiding light from the first and second display elements to one and the other eyes of an observer, respectively;
The convergence angles of the first and second imaging optical systems and the convergence angles of the first and second display optical systems are equal to each other, and the entrance pupils of the first and second imaging optical systems are the first and second imaging optical systems. And disposed closer to the outside than the exit pupil of the second display optical system,
An image display device characterized in that a baseline length of the first and second imaging optical systems is larger than an eye width of the first and second display optical systems. The size of the object when observing an object at a specific distance without going through the image display device is set to 1, and the baseline length of the first and second imaging optical systems and the first and second display optical systems When the size of the object when the image of the object is observed through the image display device when the eye width of the object is the same as β,
The baseline length of the first and second imaging optical systems is made larger than the eye width of the first and second display optical systems so that a magnification α that makes the product of β closer to 1 than β is obtained. The image display apparatus according to claim 1.   3. The apparatus according to claim 2, wherein the first and second imaging optical systems have a configuration that allows a user operation to make the baseline length larger than the eye width of the first and second display optical systems. Image display device. The image display device according to claim 2, wherein the following condition is satisfied.
0.95 ≦ αβ ≦ 1.05 The image display apparatus according to claim 2, wherein the following condition is satisfied when the specific distance is a.
200mm ≦ a ≦ 1100mm The following condition is satisfied, where d is a distance between an entrance pupil of the first and second imaging optical systems and an exit pupil of the first and second display optical systems. Item 6. The image display device according to any one of Items 1 to 5.
d <100mm