JPH0668583B2 - Heads up deathplay - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display, and more particularly to a head-up display for use in a device in which an operator operates while looking at a finite point, for example, a device such as a dome type simulator. .

2. Description of the Related Art In a head-up display mounted on an aircraft or the like, a collimated image, that is, a virtual image formed at an infinity point, is overlapped with an outside scene considered to be an infinity point. .

Further, in the above head-up display, a plurality of half mirrors are used in order to expand the field of view of the operator, and a half mirror (hereinafter, referred to as a first half) on a side closer to an image surface, for example, a screen (hereinafter, referred to as a screen). A mirror) and a half mirror (hereinafter,
The second half mirror is arranged in parallel.

However, if the head-up display mounted on an aircraft as described above is applied as it is to a dome type simulator or the like that displays an image at a finite point, the following problems occur.

Problems to be Solved by the Invention FIG. 3 is an explanatory diagram when a head-up display having a plurality of half mirrors arranged in parallel, that is, a head-up display mounted on an aircraft is directly applied to a dome type simulator. is there.

Various displays 1 appearing on a CRT or the like are imaged at a point at infinity forward through a lens 2, a turning mirror 3, a lens 4 and a plurality of half mirrors 5 and 6 arranged in parallel. In this case, a desired image, for example, an image of the outside world (scenery etc.) is displayed on the screen 8 arranged at a finite point.
Is projected.

Therefore, the display 1 causes a relative displacement between the image 9 formed by the first half mirror and the image 10 formed by the second half mirror (the image 10 is slightly above the image 9), and as a result When a person moves his / her eyes, the position of the image will be relatively different in relation to the image in the outside world.

Therefore, it is inevitable for the operator to delay motion reaction and eye fatigue.

The present invention was devised in view of the above circumstances, and even if the operator changes the position of the eyes, the virtual image is fixed on the screen, that is, the position of the virtual image is not felt and the size of the image is small. It is intended to provide a constant head-up display.

Means for Solving the Problems In the first invention, a plurality of half mirrors are provided in front of the operator, and the first half mirror is configured to be inclined at a predetermined angle with respect to the second half mirror. A second invention is that the plurality of half mirrors are in front of the operator,
The half mirror of No. 1 is configured to have a curved surface.

Action In the first aspect of the invention, the centers of the two images coincide. In the second invention, the center of the two images and the periphery thereof coincide.

Embodiment In FIG. 1, reference numeral 1 is various marks and indications displayed by a CRT or the like. In a simulator for an aircraft, this mark or display is, for example, a display showing a sighting point with respect to a reference axis of the machine body, a traveling direction or an attitude angle of the aircraft, and the like.

Here, a turning mirror 3 is provided between the lens 2 and the lens 4, and a first half mirror 11 and a second half mirror 5 inclined downward by a predetermined angle with respect to the first half mirror 11 are provided above the lens 2, These form an optical system for forming a virtual image on the screen 8.

In a head-up display equipped with such an optical system, the display 1 includes a lens 2 and a turning mirror 3.
Then, through the lens 4 and reaching the half mirrors 5 and 11 installed in front of the operator, the virtual images 9 and 12 are displayed on the screen 8 arranged at a finite point, and a part of the half image is displayed. It is reflected back by the mirror and returns to the operator side.

A desired image, for example, an image of the outside world (scenery or the like) is projected from the back surface of the screen 8.

In this case, the display 1 appears as a virtual image 9 when the operator places his or her eyes in the 7 position, and the display 1 appears slightly below the virtual image 9 when the eyes are placed slightly above the 7 position. Seen as a tilted virtual image 12.

That is, in this case, unlike FIG. 3, the two images coincide at their centers. However, in this case, the position shift occurs, though it is slight, as it approaches the periphery of the image.

The one shown in FIG. 2 shows a head-up display which is a further improvement of the first invention.

In FIG. 2, reference numeral 1 is various marks and indications which are displayed by a CRT or the like.

Here, there is a turning mirror 3 between the lens 2 and the lens 4, and above the lens 2 there are a first half mirror 13 curved so as to be convex forward and a second planar half mirror 5. Yes, these constitute an optical system for forming a virtual image on the screen 8.

In a head-up display equipped with such an optical system, the display 1 includes a lens 2 and a turning mirror 3.
And through the lens 4, it reaches the half mirror 5 and the curved half mirror 13 installed in front of the operator, displays the virtual images 9 and 14 on the screen 8 arranged at a finite point, and Part of the light is reflected back by the half mirror and returns to the operator side.

A desired image, for example, an image of the outside world (scenery or the like) is displayed on the screen 8.

In this case, the virtual images 14 and 9 are not only at their centers,
Even in the peripheral portion thereof, they completely coincide with each other, and the two are not displaced. In other words, the two virtual images are completely the same in size and position. The screen, that is, the image plane may be a fictitious image plane.

In addition, since both images are formed at a finite point, the operator can easily recognize the two without seeing the focal length of the eyes when he or she intends to see the two alternately.

The head-up display according to the present invention can be applied to a simulator for car practice. Further, the present invention can be applied not only to a simulator but also to a head-up display of an automobile.

Effects of the Invention As described above, when the head-up display of the present invention is used in a device such as a dome-type simulator for manipulating while looking at a finite distance, a plurality of half mirrors are used. The field of view is enlarged, and even if the position of the eyes is changed, the position or size of the display is not changed and recognized.

Therefore, when such a head-up display is applied to a dome type simulator, there is no delay in the reaction operation of the operator, and the operator does not feel eye fatigue.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a head-up display according to the first invention, and FIG. 2 is an explanatory diagram of a head-up display according to the second invention. FIG. 3 is an explanatory diagram in the case where a head-up display that images a display at an infinity point by using a plurality of parallel half mirrors is directly applied to a dome type simulator. 5 ... 2nd half mirror, 11, 13 ... 1st half mirror, 8 ... Image plane, 9, 12, 14 ... Virtual image.

Claims (2)

[Claims] 1. An optical system for forming various displays as virtual images at a position of an image plane for displaying an image of the outside world, wherein the optical system includes a plurality of half mirrors installed in front of an operator. The half mirror closer to the image plane is tilted by a predetermined angle with respect to the half mirror farther from the image plane, so that the half mirror seen through the half mirror closer to the image plane and the half farther from the image plane. A head-up display that is configured to match the relative positional relationship with a virtual image seen through a mirror. 2. An optical system for forming various displays as virtual images at a position of an image plane displaying an image of the outside world, wherein the optical system includes a plurality of half mirrors installed in front of the operator. And the half mirror on the side closer to the image plane is a curved surface, so that the size of the virtual image seen through the half mirror on the side closer to the image plane and the size of the virtual image seen through the half mirror farther from the image plane are the same. A head-up display that is characterized as configured as follows.