JPH10123992A - Spatial indication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spatial indication device installable at an arbitrary point. SOLUTION: A beam of light oscillated from a laser light beam 1 is separated into its spectrum components by a half mirror 2; after a light path is adjusted by mirrors 3, 8, 9, a hologram recording material 6 is irradiated with two beams of light through diffuse lenses 4, 10 and magnifying lens 5 for forming a hologram; and visually recognizable transmitting information can be image-formed in a space in front of the hologram mirror by irradiating the hologram mirror with the light sources.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sign device for imaging transmitted information in space.

[0002]

2. Description of the Related Art Transmission information such as road signs installed in a road tunnel needs to be provided to a driver of a traveling automobile accurately.

In conventional road signs for road tunnels, as shown in FIGS. 10 and 11, a road sign having a sign to be displayed arranged on the surface is installed on a ceiling surface or a side surface of the road tunnel. It was designed so that the driver of a running car could see ahead.

In FIGS. 10 and 11, reference numeral 23 denotes a road sign for variable information, reference numeral 24 denotes an information display surface formed on the front surface of the road sign for variable information 23, and reference numeral 21 denotes a road tunnel on which the road sign 23 for variable information is installed. , 22 are cars running in a road tunnel.

[0005] The driver of the automobile 22 is provided with the information displayed on the information display surface 24 of the variable information road sign 23 installed in front of the vehicle.

[0006] A hologram technique is used for a road sign, for example, a three-dimensional sign as shown in Japanese Utility Model Application Laid-Open No. 61-152011. In this method, an image of an object to be a marker is printed on a hologram dry plate using a light interference phenomenon together with reference light, and an image previously printed by irradiating the hologram dry plate with reproduction light ( Label) is reproduced by the light diffraction phenomenon and is to be viewed.

[0007]

SUMMARY OF THE INVENTION Road sign for variable information 2
3 is often installed in a limited place such as a ceiling portion and a side portion of the road tunnel 21 in order to effectively use a limited space in the road tunnel 21. The displayed sign needs to be easily visible, and at the same time, it is necessary not to hinder the running of the vehicle. Therefore, there is a problem that an installation place is limited and it is difficult to install the sign depending on the place.

In the case of a three-dimensional marker as disclosed in Japanese Utility Model Application Laid-Open No. 61-152011, the reproduced image is previously printed on a hologram dry plate, so that the display content cannot be changed, and the usage range is limited. There is a problem that it is limited.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a space sign device which is used as a space information sign and which can be easily recognized visually and can be installed at an arbitrary position.

[0010]

In order to achieve the above object, a first means of the present invention comprises a light source for irradiating light, an optical element for receiving light from the light source and forming an image in a space, A transmission mark document provided between the light source and the optical element.

According to a second aspect of the present invention, in addition to the first aspect, the light source itself can display the contents of the sign.

According to a third aspect of the present invention, the optical element of the first or second means is provided in a tunnel.

According to a fourth aspect of the present invention, the light source and the optical element of the first or the second means are separately arranged.

According to a fifth aspect of the present invention, an optical path changing means for changing an optical path is provided between the light source of the first or second means and the optical element.

[0015]

According to the above construction, the space marking device according to the first means of the present invention reproduces the optical element in front of the optical element in a meter order by a diffraction phenomenon when the optical element is irradiated by the light source from the same direction as when the optical element was produced. An image can be formed. For this reason, this space marking device can be attached to, for example, the ceiling or side wall of a road tunnel and used for transmitting traffic information in the road tunnel, and the driver of the vehicle can easily recognize the transmitted information visually. can do. In addition, since the image forming position can be arranged at a position distant from the space marking device itself, the optical element and the light source can be easily installed at arbitrary positions.

Further, the space sign device of the second means uses a light source capable of displaying the sign information itself, and can change the sign information more easily by replacing itself. .

Further, in the space marking device of the third means, since the optical element is provided on the ceiling surface or the side surface of the road tunnel, for example, the projecting amount from the installation surface is small, so that the effective use space can be increased.

Further, in the space marking device of the fourth means, since the light source and the optical element are separated, for example, the light source can be installed on the inspection road on the side from the traveling lane of the road tunnel,
Maintenance inspection can be performed safely. Further, for example, a space marking device on the ceiling surface of a road tunnel can be installed without requiring additional work such as electric wiring, and enables easy maintenance and inspection.

Further, since the space marking device of the fifth means is provided with the optical path changing means for changing the optical path, the restriction on the installation direction of the light source is reduced, and the space marking device can be installed more easily.

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a diagram showing a method of recording interference fringes of a hologram mirror using a magnifying lens, and FIG.
FIG. 4 is a diagram illustrating a method of recording interference fringes of a hologram mirror using a concave mirror. A hologram mirror can be created using hologram technology. Figure 1 shows the hologram mirror
As shown in FIG. 5, the light source oscillated from the laser light source 1 is split by the half mirror 2 to adjust the optical path by the mirror 3 and then passes through the diffusion lens 4 and the magnifying lens 5 and the light path is adjusted by the mirror 8 and then diffused. The two rays of the rays passing through the lens 9 and the magnifying lens 10 are formed at an appropriate angle (0 degrees is most desirable in order to reduce the blur of the reproduced image, but the viewing direction and the direction of the reproducing light source overlap,
The hologram recording material 6 is formed by irradiating the hologram recording material 6 with the hologram recording material 6 from an angle of about 20 degrees for practical use, and recording the intensity distribution of interference fringes on the hologram recording material 6. At this time, a similar result can be obtained by using a concave mirror 11 instead of the magnifying lens 5 as shown in FIG.

According to the space marker using the hologram mirror formed in this way, when the hologram mirror is irradiated from the same direction as when the hologram mirror is formed by the light source, a reproduced image is formed on the front surface of the hologram mirror in a meter order by a diffraction phenomenon. An image can be formed. For this reason, this space marking device can be attached to, for example, the ceiling or side wall of a road tunnel and used for transmitting traffic information in the road tunnel, and the driver of the vehicle can easily recognize the transmitted information visually. can do. In addition, since the image forming position can be arranged at a position distant from the space marker device itself, the hologram mirror and the light source can be easily installed at arbitrary positions.

(Embodiment 2) FIG. 3 is a schematic structural view of a space marker using a diffused laser generator as a light source. By irradiating the transmission mark original 15 toward the hologram mirror 12 by the diffusion laser generator 14, an image similar to that of the transmission mark original 15 can be formed in the space of the reproduction image forming position 13. As described above, the transparent marker original 1
By changing 5, it is possible to arbitrarily display the sign information. At this time, a similar effect can be obtained by using a combination of a laser oscillator (not shown) and a diffusion lens (not shown) provided on the optical axis instead of the diffusion laser generator 14.

(Embodiment 3) FIG. 4 is a schematic configuration diagram of a space marking device using a white light and a lens as a light source. The white light 16 is enlarged instead of using the diffused laser generator 14 of the second embodiment. The lens 5 is provided. As in the case of the third embodiment, it is possible to arbitrarily display marker information by changing the transparent marker document 15.

(Embodiment 4) By using a light source capable of displaying the sign information itself, the sign information can be changed more easily. For example, FIG. 5 is a schematic configuration diagram of a space sign using an LED display as a light source.

By irradiating the hologram mirror 12 with the LED display 17 instead of using the light source and the transmission mark original of the third embodiment, an image similar to the display of the LED display 17 is provided in the space of the reproduction imaging position 13. Can be imaged. According to this space marker device, it is possible to more easily variably display the marker information by changing the display content of the LED display 17.

(Embodiment 5) FIG. 6 is a schematic configuration diagram of a space sign using a liquid crystal display as a light source. Instead of using the LED display 17 of Embodiment 4, the liquid crystal display 1
8 are arranged. According to this space marker device, it is possible to arbitrarily and variably display the marker information by changing the display content and display color of the liquid crystal display 18.

(Embodiment 6) FIG. 7 is a view showing the installation of a space marking device on the ceiling surface of a road tunnel. In FIG. 7, 2
Reference numeral 0 denotes a main body of the space marking device, which includes a hologram mirror 12 and a light source 19 for irradiating the contents of the sign.
Reference numeral 21 denotes a road tunnel in which a space marking device is installed on a ceiling surface, reference numeral 22 denotes an automobile running on a road, reference numeral 13 denotes a light source 19.
When the hologram mirror 12 is irradiated with the sign information, the mark is a reproduction image forming position where the same sign information is formed.

The size of the characters that the driver can visually recognize the sign must be a minimum of 20 cm at a position of 100 m for a person with an eyesight of 0.7, and the standard for setting road signs (Japan Road Association).
According to the report, on a road with a design speed of 60 km / h, the character size of the guide sign is 20 cm in principle and the design speed is 70 km / h
It is set to 30 cm in principle for h or more. Also, assuming that the visible space is 150 m to 50 m in front of the sign and the driver's eye height is 1.2 m in a small car, the driver's view angle at which the sign at a position of 5 m can be visually recognized is 1.5 to 4. .4 degrees.

Therefore, the space marking device 20 has a length of 150 m
Reproduction imaging position 1 50 m ahead and viewing angle in the range of 2 to 5 degrees
3 is attached to the ceiling surface of the road tunnel 21 so that a character of about 30 cm exists. When the hologram mirror 12 is irradiated with the sign information by the light source 19, the information is three-dimensionally formed on the reproduced image forming position 13, and the driver of the automobile 22 can recognize the information quickly and accurately by visual recognition and easily grasp the information. be able to. Further, according to such a space sign device, the space sign body protrudes from the installation surface of the road tunnel with a small amount, so that a large space can be effectively used.

Note that, even if the hologram mirror 12 is installed on the side surface of the road tunnel 21, the same effect as when it is installed on the ceiling surface can be obtained.

(Embodiment 7) FIG. 8 is a view showing an installation of a space marking device in which a light source is separated from a ceiling surface of a road tunnel. In the embodiment 6, the light source 19 is separated from a main body of the space marking device 20. In addition, the light source 19 can be installed on the inspection road on the side from the traveling lane of the road tunnel 21, and the maintenance and inspection can be performed safely. Further, according to this space marking device, the space marking device 20 on the ceiling surface of the road tunnel 21 is used.
Can be installed without any additional work such as electrical wiring,
This allows for easy maintenance and inspection.

Even when the hologram mirror 12 is installed on the side of the road tunnel 21, the same effect as when it is installed on the ceiling can be obtained.

(Embodiment 8) FIG. 9 is a schematic configuration diagram in which a mirror is arranged between a light source and a hologram mirror.

A mirror 3 that can change the optical path of irradiation light is provided between the light source 19 and the hologram mirror 12, thereby changing the direction of the irradiation light to change the direction of the irradiation light.
Can be arranged arbitrarily. For this reason, restrictions on the installation direction of the light source 19 are reduced, and the installation of the space marking device can be further facilitated.

As described above, it is possible to install a space marking device capable of changing the display content on the ceiling surface of a road tunnel, which was conventionally difficult to install, and there is a shortage of transmitted information in a closed space. It has been eliminated and has a significant role to play in safe driving and emergency communication.

Although the hologram mirror is used as the optical element constituting the space marking device, it may be an aspheric lens. In this case, mass production can be performed relatively easily and inexpensively.

[0037]

As is apparent from the above description, the first space marking device of the present invention is provided with an optical element for forming an image of a transmission marking document in space by light from a light source, so that it can be arbitrarily reproduced. The image can be formed, and the degree of freedom in installing the space marking device is increased.

Further, the second space marking device itself can display the sign information as a light source, so that the sign information can be changed more easily by changing the light source itself.

In the third space marking device, since the optical element is provided in the tunnel, the amount of protrusion of the space marking body from the installation surface of the tunnel is small, and the effective space can be increased.

Further, in the fourth space marking device, since the light source is separated from the body of the space marking device, the reproduction light source can be installed on the inspection road on the side from the traveling lane of the road tunnel, and the maintenance and inspection can be performed safely. it can. In addition, the space marking device on the ceiling surface of the road tunnel can be installed without any additional work such as electric wiring, and enables easy maintenance and inspection.

Further, since the fifth space marking device is provided with the optical path changing means for changing the light path, the restriction on the installation direction of the light source is reduced, and the installation of the space marking device can be further facilitated.

Further, the third to fifth space sign devices can be used for transmitting traffic information in a road tunnel by being attached to, for example, a ceiling surface or a side wall surface of a road tunnel. The information to be obtained can be easily visually recognized. Moreover, since the image forming position can be arranged at a position distant from the space marking device itself, the space marking device can be easily installed at an arbitrary position.

[Brief description of the drawings]

FIG. 1 is a diagram showing a method of recording interference fringes of a hologram mirror using a magnifying lens according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a method for recording interference fringes of a hologram mirror using a concave mirror according to the first embodiment of the present invention;

FIG. 3 is a schematic configuration diagram of a space marker using a diffused laser generator as a light source according to a second embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a space marker using a white light and a lens as a light source according to a third embodiment of the present invention.

FIG. 5 shows LE as a light source according to a fourth embodiment of the present invention.
Schematic configuration diagram of space sign using D display

FIG. 6 is a schematic configuration diagram of a space sign using a liquid crystal display as a light source according to a fifth embodiment of the present invention.

FIG. 7 is a view showing an installation of a space marking device on a ceiling surface of a road tunnel according to a sixth embodiment of the present invention.

FIG. 8 is a view showing an installation of a space marking device in which a light source is separated on a ceiling surface of a road tunnel according to a seventh embodiment of the present invention.

FIG. 9 is a schematic configuration diagram in which a mirror is arranged between a light source and a hologram mirror according to an eighth embodiment of the present invention.

FIG. 10 is a conventional road sign diagram

FIG. 11 is a conventional road sign installation diagram.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 laser light source 2 half mirror 3, 8, 9 mirror 4, 10 diffusion lens 5 magnifying lens 6 hologram recording material 7 object light convergence point 11 concave mirror 12 hologram mirror 13 reproduction image position 14 diffused laser generator 15 transmission mark original 16 white Light 17 LED display 18 Liquid crystal display 19 Light source 20 Space marking device

Claims (10)

[Claims] 1. A space marker comprising: a light source for irradiating light; an optical element for receiving light from the light source to form an image in a space; and a transparent marker document provided between the light source and the optical element. apparatus. 2. The light source according to claim 1, wherein the light source is a diffused laser generator.
A space marking device as described. 3. The space marking device according to claim 2, wherein the diffusion laser generator comprises a laser oscillator and a diffusion lens provided on the optical axis. 4. The space marking device according to claim 1, wherein the light source is a white light, and a diffusion lens is provided between the light source and the translucent marking document. 5. A space marking device, comprising: a light source for irradiating light; and an optical element for receiving the light from the light source and forming an image in a space, wherein the light source itself displays the contents of the sign. 6. The space marking device according to claim 5, wherein the light source is an LED display. 7. The space marking device according to claim 5, wherein the light source is a liquid crystal display. 8. The space marking device according to claim 1, wherein the optical element is provided on a ceiling surface or a side surface of the tunnel. 9. A light source and an optical element are separated from each other.
Or the space marking device according to claim 5. 10. The space marking device according to claim 1, further comprising an optical path changing means for changing an optical path between the light source and the optical element.