A multiple folded reflective aerial imaging display system

Abstract

The application discloses a multi-folded reflection type aerial imaging display system, and relates to the field of aerial imaging, which comprises a display source, a plane mirror, a beam splitter and a curved mirror; light beams emitted by the display source are reflected to the beam splitter by the plane mirror, and part of the light beams are reflected to the curved mirror by the surface of the beam splitter; the light beams reaching the curved mirror are reflected to the beam splitter and then transmitted through the beam splitter, so that a floating image is formed on the other side of the beam splitter. The application utilizes off-axis placement of the plane mirror, the beam splitter and the curved mirror to realize compression of the system volume, solves the problems of large volume of the aerial imaging system and small floating distance of the floating image, realizes thinning of the system, and enhances the display effect of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerial imaging, in particular to a multi-fold reflection type aerial imaging display system. BACKGROUND

[0002] Aerial imaging technology generates image information in the air by regulating the light propagation path or directly exciting the medium, so that the viewer can see the suspended image without wearing vision-aiding equipment. Aerial imaging technology breaks the limitation of display screen on display content in traditional display systems, has a unique and shocking display effect, and has a wide application scenario in the fields of entertainment, education, medical treatment, etc., and is regarded as a new generation of display technology.

[0003] However, the current aerial imaging display devices based on a beam splitter and a curved mirror are mostly coaxial systems, and the beam splitter needs to be placed at an angle of 45° to realize the suspended display effect, thus the following two problems may occur:

[0004] 1. Since the beam splitter is placed at an angle of 45°, the volume of the system will be relatively large, which makes it difficult to meet the application requirements of scenes with high space layout requirements.

[0005] 2. The 45° angle of the beam splitter also reduces the distance between the suspended image and the system, thus reducing the out-of-screen feeling of the suspended image and weakening the display effect.

[0006] The above two points seriously hinder the commercialization and application of the technology. SUMMARY

[0007] In view of the above deficiencies in the prior art, the present application provides a multi-fold reflection type aerial imaging display system which solves the problems of large system volume, reduced out-of-screen feeling of the suspended image and weakened display effect caused by the 45° angle of the beam splitter.

[0008] In order to achieve the above-mentioned application purposes, the technical scheme adopted by the present application is as follows:

[0009] The present application provides a multi-fold reflection type aerial imaging display system, which comprises a display source, a plane mirror, a beam splitter and a curved mirror; wherein:

[0010] The light beam emitted by the display source is reflected by the plane mirror to the beam splitter, and part of the light beam is reflected by the surface of the beam splitter to the curved mirror; the light beam reaching the curved mirror is reflected to the beam splitter and transmitted through the beam splitter, forming a suspended image on the other side of the beam splitter;

[0011] When the light beam from the curved mirror horizontally exits the beam splitter, the display source is located below the beam splitter, the flat mirror is located below the curved mirror, the beam splitter and the curved mirror are centrally aligned, and the angle between the beam splitter and the vertical direction is greater than 10° and less than 25°.

[0012] Further, the distance between the floating image and the aerial image display system is adjusted by adjusting the equivalent focal length of the curved mirror, the path of the light beam from the display source to the curved mirror, the angle between the display source and the vertical direction, the angle between the flat mirror and the vertical direction, and / or the angle between the beam splitter and the vertical direction; wherein the distance between the floating image and the aerial image display system has the following constraint relationship:

[0013]

[0014] wherein is the minimum distance between the floating image and the beam splitter, i.e., the distance between the floating image and the aerial image display system; is the equivalent focal length of the curved mirror; is the path of the light beam from the display source to the curved mirror, i.e., the object distance; is the cosine function; is the angle between the display source and the vertical direction; is the angle between the flat mirror and the vertical direction; is the angle between the beam splitter and the vertical direction; is the thickness of the aerial image display system; .

[0015] Further, when the light beam from the curved mirror horizontally exits the beam splitter, the thickness of the aerial image display system is:

[0016]

[0017] wherein is the thickness of the aerial image display system; is the horizontal distance between the center of the beam splitter and the center of the curved mirror; is the height of the beam splitter; is the angle between the beam splitter and the vertical direction; is the sine function.

[0018] Further, the object distance is adjusted by adjusting the path of the light beam from the display source to the flat mirror, the path of the light beam from the flat mirror to the beam splitter, and / or the distance of the light beam from the beam splitter to the curved mirror; wherein the object distance is:

[0019]

[0020]

[0021]

[0022]

[0023] wherein is the path of the light beam from the display source to the curved mirror, i.e. the object distance; is the path of the light beam from the display source to the flat mirror; is the horizontal distance between the center of the display source and the center of the flat mirror; is the path of the light beam from the flat mirror to the beam splitter; is the vertical distance between the center of the flat mirror and the center of the beam splitter; is the path of the light beam from the beam splitter to the curved mirror.

[0024] Further, the size of the floating image is adjusted by adjusting the equivalent focal length of the curved mirror, the object distance, the angle between the display source and the vertical direction, the angle between the flat mirror and the vertical direction, the angle between the beam splitter and the vertical direction, and / or the width of the display source; wherein the size of the floating image has the following constraint relationship:

[0025]

[0026] wherein is the size of the floating image; is the equivalent focal length of the curved mirror; is the path of the light beam from the display source to the curved mirror, i.e. the object distance; is the cosine function; is the angle between the display source and the vertical direction; is the angle between the flat mirror and the vertical direction; is the angle between the beam splitter and the vertical direction; is the width of the display source.

[0027] Further, the visual angle of the floating image is adjusted by adjusting the width of the curved mirror, the size of the floating image, and / or the distance between the floating image and the aerial imaging display system; wherein the visual angle of the floating image has the following constraint relationship:

[0028]

[0029] wherein is the visual angle of the floating image; is the tangent function; is the width of the curved mirror; is the size of the floating image; This is the minimum distance between the suspended image and the beam splitter, which is also the distance between the suspended image and the aerial imaging display system.

[0030] Furthermore, the width of the curved mirror is related to its focal length. It has the following constraints:

[0031]

[0032] in The width of the curved mirror; The equivalent focal length of the curved mirror;

[0033] Focal length of curved mirror Width of the display source Width of the floating image It has the following constraints:

[0034]

[0035] in This is the minimum distance between the suspended image and the beam splitter, which is also the distance between the suspended image and the aerial imaging display system; The thickness of the aerial imaging display system.

[0036] Furthermore, when the beam from the curved mirror exits the beam splitter horizontally, the angle between the plane mirror and the vertical direction... The range of values ​​and the angle between the curved mirror and the vertical direction. The range of values ​​for are as follows:

[0037]

[0038] .

[0039] Furthermore, the vertical distance between the center of the plane mirror and the center of the beam splitter... It has the following constraints:

[0040]

[0041] in The height of the plane mirror; The angle between the plane mirror and the vertical direction; The height of the curved mirror; The angle between the curved mirror and the vertical direction; It is a cosine function;

[0042] The height of the beam splitter is greater than or equal to the height of the curved mirror;

[0043] Height of curved mirror has the following constraint relationship:

[0044]

[0045] wherein is the width of the curved mirror.

[0046] Further, when the light beam from the curved mirror is horizontally emitted from the beam splitter, the height of the aerial imaging display system is:

[0047]

[0048] wherein is the vertical distance between the center of the display source and the center of the plane mirror; is the vertical distance between the center of the plane mirror and the center of the beam splitter; is the height of the display source; is the height of the beam splitter; is the angle between the display source and the vertical direction; is the angle between the beam splitter and the vertical direction; is the cosine function.

[0049] The present application has the beneficial effects that: the present application utilizes off-axis placement of the plane mirror, the beam splitter and the curved mirror to realize compression of the system volume, solves the problems of large volume of such aerial imaging systems and small suspended distance of the suspended image, realizes thinning of the system and enhances the display effect of the system. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is a schematic diagram of the three-dimensional structure of the present aerial imaging display system;

[0051] Figure 2 is a side view of the present aerial imaging display system;

[0052] wherein: 1, display source; 2, plane mirror; 3, beam splitter; 4, curved mirror. DETAILED DESCRIPTION

[0053] The specific embodiments of the present application are described below in order to facilitate understanding of the present application by those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, as long as various changes are within the spirit and scope of the present application as defined and determined by the appended claims, these changes are obvious, and all applications utilizing the concept of the present application are within the scope of protection.

[0054] Example One:

[0055] The embodiment is introduced by taking the light beam horizontally emitted from the spectroscope 3 of the curved mirror 4 as an example. When the angle of the light beam emitted from the curved mirror 4 to the spectroscope 3 needs to be adjusted, the angle of the multi-fold reflection type aerial imaging display system can be adjusted as a whole.

[0056] As shown in Figure 1 and Figure 2 , the multi-fold reflection type aerial imaging display system comprises a display source 1, a plane mirror 2, a spectroscope 3 and a curved mirror 4; wherein:

[0057] The light beam emitted by the display source 1 is reflected by the plane mirror 2 to the spectroscope 3. Part of the light beam is reflected by the surface of the spectroscope 3 to the curved mirror 4, and another part of the light beam will pass through the spectroscope 3 and will not be used subsequently. The light beam reaching the curved mirror 4 is reflected to the spectroscope 3 and passes through the spectroscope 3, thereby forming a floating image on the other side of the spectroscope 3.

[0058] The display source 1 is located below the spectroscope 3, the plane mirror 2 is located below the curved mirror 4, the spectroscope 3 and the curved mirror 4 are centrally aligned, and the included angle between the spectroscope 3 and the vertical direction is greater than 10° and less than 25°.

[0059] For the aerial imaging system, the imaging distance of the floating image will affect the display effect. The farther the imaging distance, the more shocking the display effect. For the aerial imaging display system, the distance between the floating image and the aerial imaging display system is adjusted by adjusting the equivalent focal length of the curved mirror 4, the path of the light beam emitted by the display source 1 to the curved mirror 4, the included angle between the display source 1 and the vertical direction, the included angle between the plane mirror 2 and the vertical direction and / or the included angle between the spectroscope 3 and the vertical direction. The distance between the floating image and the aerial imaging display system has the following constraint relationship:

[0060]

[0061] Wherein is the minimum distance between the floating image and the spectroscope 3, that is, the distance between the floating image and the aerial imaging display system; is the equivalent focal length of the curved mirror 4; is the path of the light beam emitted by the display source 1 to the curved mirror 4, that is, the object distance; is the cosine function; is the included angle between the display source 1 and the vertical direction; is the included angle between the plane mirror 2 and the vertical direction; is the included angle between the spectroscope 3 and the vertical direction; is the thickness of the aerial imaging display system.

[0062] The thickness of the aerial imaging display system is:

[0063]

[0064] wherein is the horizontal distance between the center of the beam splitter 3 and the center of the curved mirror 4; is the height of the beam splitter 3; is a sinusoidal function.

[0065] In the present embodiment, the object distance is adjusted by adjusting the path of the light beam from the display source 1 to the flat mirror 2, the path of the light beam from the flat mirror 2 to the beam splitter 3 and / or the distance of the light beam from the beam splitter 3 to the curved mirror 4; wherein the object distance is:

[0066]

[0067]

[0068]

[0069]

[0070] wherein is the path of the light beam from the display source 1 to the curved mirror 4, i.e. the object distance; is the path of the light beam from the display source 1 to the flat mirror 2; is the horizontal distance between the center of the display source 1 and the center of the flat mirror 2; is the path of the light beam from the flat mirror 2 to the beam splitter 3; is the vertical distance between the center of the flat mirror 2 and the center of the beam splitter 3; is the distance of the light beam from the beam splitter 3 to the curved mirror 4.

[0071] In order to ensure that the light rays emitted by the display source 1 converge in the air to generate a real image of the display source 1, the distances between the various elements in the aerial imaging display system need to be controlled to control the path length of the light rays (i.e. to control the object distance), which needs to satisfy the formula:

[0072] .

[0073] In the present embodiment, the size of the levitated image is adjusted by adjusting the equivalent focal length of the curved mirror 4, the object distance, the angle between the display source 1 and the vertical direction, the angle between the flat mirror 2 and the vertical direction, the angle between the beam splitter 3 and the vertical direction and / or the width of the display source 1; wherein the size of the levitated image has the following constraint relationship:

[0074]

[0075] wherein is the size of the floating image; is the equivalent focal length of the curved mirror 4; is the path of the light beam emitted by the display source 1 to the curved mirror 4, i.e. the object distance; is the cosine function; is the angle between the display source 1 and the vertical direction; is the angle between the plane mirror 2 and the vertical direction; is the angle between the beam splitter 3 and the vertical direction; is the width of the display source 1.

[0076] In the embodiment, the visual angle of the floating image is adjusted by adjusting the width of the curved mirror 4, the size of the floating image and / or the distance between the floating image and the aerial imaging display system; wherein the visual angle of the floating image has the following constraint relationship:

[0077]

[0078] wherein is the visual angle of the floating image; is the tangent function; is the width of the curved mirror 4; is the size of the floating image; is the minimum distance between the floating image and the beam splitter 3, i.e. the distance between the floating image and the aerial imaging display system.

[0079] In the embodiment, in order to ensure the display quality of the floating image, the relative aperture of the curved mirror 4 needs to be controlled, and the width of the curved mirror 4 and the focal length of the curved mirror 4 have the following constraint relationship:

[0080]

[0081] wherein is the width of the curved mirror 4; is the equivalent focal length of the curved mirror 4;

[0082] the focal length of the curved mirror 4 and the width of the display source 1 , the width of the floating image have the following constraint relationship:

[0083]

[0084] wherein is the minimum distance between the floating image and the beam splitter 3, i.e. the distance between the floating image and the aerial imaging display system.

[0085] In the embodiment, when the light beam from the curved mirror 4 horizontally exits the beam splitter 3, the angle between the plane mirror 2 and the vertical direction The value range of the angle between the curved mirror 4 and the vertical direction is respectively:

[0086]

[0087] .

[0088] The vertical distance between the center of the plane mirror 2 and the center of the beam splitter 3 has the following constraint relationship:

[0089]

[0090] wherein is the height of the plane mirror 2; is the angle between the plane mirror 2 and the vertical direction; is the height of the curved mirror 4; is the angle between the curved mirror 4 and the vertical direction; is the cosine function;

[0091] The height of the beam splitter 3 is greater than or equal to the height of the curved mirror 4;

[0092] The height of the curved mirror 4 has the following constraint relationship:

[0093]

[0094] wherein is the width of the curved mirror 4.

[0095] In the embodiment, when the light beam from the curved mirror 4 horizontally exits the beam splitter 3, the height of the aerial imaging display system is:

[0096]

[0097] wherein is the vertical distance between the center of the display source 1 and the center of the plane mirror 2; is the vertical distance between the center of the plane mirror 2 and the center of the beam splitter 3; is the height of the display source 1; is the height of the beam splitter 3; is the angle between the display source 1 and the vertical direction; is the angle between the beam splitter 3 and the vertical direction; is the cosine function.

[0098] Example 2:

[0099] This embodiment is a further extension based on Embodiment 1. In this embodiment, the steps for determining the parameters of the aerial imaging display system are as follows:

[0100] S1. Determine the floating distance of the displayed image according to requirements. Size of the levitation image Viewing angle of suspending images System thickness Target value;

[0101] S2. Determine the dimensions of the curved mirror 4. ;

[0102] S3. Determine the size of display source 1. and Determine the rotation angle of plane mirror 2 within the defined range. Determine the rotation angle of beam splitter 3 within the defined range. Determine the height of the curved mirror 4 within the defined area. Determine the height of beam splitter 3 within the defined area. In this embodiment, , , ;

[0103] S4. Determine the horizontal distance between the center of beam splitter 3 and the center of curved mirror 4. ;

[0104] S5. Determine the focal length of the curved mirror 4 within the defined area. In this embodiment ;

[0105] S6. Determine the rotation angle of display source 1. ;

[0106] S7. Determine the altitude of the aerial imaging display system according to requirements. This allows us to determine the horizontal distance between the center of display source 1 and the center of plane mirror 2. The vertical distance between the center of plane mirror 2 and the center of beam splitter 3 ;

[0107] S8. Determine the rotation angle of the curved mirror 4 within the defined range. Determine the height of plane mirror 2 within the designated area. In this embodiment, the upper edge of the planar reflector 2 is in close contact with the lower edge of the curved reflector 4. Therefore, it can be determined The accurate value of the system parameter is not given.

[0108] The system parameter is not given and can be selected as appropriate.

[0109] The parameters obtained by the embodiment include:

[0110] The display source 1 has a width of 70 mm, a height of 40 mm, an angle of 45° with the vertical direction, a horizontal distance of 41 mm from the center of the plane mirror 2, and a vertical distance of 42 mm from the center of the plane mirror 2.

[0111] The plane mirror 2 has a width of 34 mm, a height of 34 mm, and is perpendicular to the ground, and has a vertical distance of 60 mm from the center of the light splitter 3.

[0112] The light splitter 3 has a width of 120 mm, a height of 80 mm, a splitting ratio of 1, an angle of 20° with the vertical direction, and a horizontal distance of 48 mm from the center of the curved mirror 4.

[0113] The curved mirror 4 has a width of 120 mm, a height of 80 mm, a radius of curvature of 150 mm, a focal length of 75 mm, a spherical surface, and an angle of 5° with the vertical direction.

[0114] The air imaging display system finally has a width of about 61.5 mm and a height of about 160 mm, and can generate a floating image with a width of 50 mm and a height of 26 mm at a horizontal distance of 80 mm from the air imaging display system.

Claims

1. A multiple-fold, reflective, aerial imaging display system, characterized by, It comprises a display source (1), a plane mirror (2), a beam splitter (3) and a curved mirror (4); wherein: The light beam emitted by the display source (1) is reflected by the plane mirror (2) to the beam splitter (3), and part of the light beam is reflected by the surface of the beam splitter (3) to the curved mirror (4); the light beam reaching the curved mirror (4) is reflected to the beam splitter (3) and transmitted through the beam splitter (3), forming a floating image on the other side of the beam splitter (3); When the light beam from the curved mirror (4) horizontally exits the beam splitter (3), the display source (1) is located below the beam splitter (3), the plane mirror (2) is located below the curved mirror (4), the center of the beam splitter (3) and the curved mirror (4) are aligned, and the angle between the beam splitter (3) and the vertical direction is greater than 10° and less than 25°; The distance between the floating image and the aerial imaging display system is adjusted by adjusting the equivalent focal length of the curved mirror (4), the path of the light beam emitted by the display source (1) to the curved mirror (4), the angle between the display source (1) and the vertical direction, the angle between the plane mirror (2) and the vertical direction, and / or the angle between the beam splitter (3) and the vertical direction; wherein the distance between the floating image and the aerial imaging display system has the following constraint relationship: wherein is the minimum distance of the levitated image from the beam splitter (3), i.e. from the aerial imaging display system; is the equivalent focal length of the curved mirror (4); is the path of the light beam emitted by the display source (1) to the curved mirror (4), i.e. the object distance; is the cosine function; is the angle of the display source (1) with the vertical; is the angle of the flat mirror (2) with the vertical; is the angle of the beam splitter (3) with the vertical; is the thickness of the aerial imaging display system; 。 2. The multi-fold reflective airborne imaging display system of claim 1, wherein, When the light beam from the curved mirror (4) exits the beamsplitter (3) horizontally, the thickness of the aerial image display system is: H = 2 * f wherein is the thickness of the aerial imaging display system; is the horizontal distance between the center of the beam splitter (3) and the center of the curved mirror (4); is the height of the beam splitter (3); is the angle of the beam splitter (3) with the vertical direction; is a sinusoidal function.

3. The multi-fold reflective airborne imaging display system of claim 1, wherein: The object distance is adjusted by adjusting the path of the light beam from the display source (1) to the plane mirror (2), the path of the light beam from the plane mirror (2) to the beam splitter (3), and / or the distance of the light beam from the beam splitter (3) to the curved mirror (4); wherein the object distance is: wherein is the path taken by the light beam from the display source (1) to the curved mirror (4), i.e. the object distance; is the path taken by the light beam from the display source (1) to the flat mirror (2); is the horizontal distance between the centre of the display source (1) and the centre of the flat mirror (2); is the path taken by the light beam from the flat mirror (2) to the beam splitter (3); is the vertical distance between the centre of the flat mirror (2) and the centre of the beam splitter (3); is the distance taken by the light beam from the beam splitter (3) to the curved mirror (4).

4. The multi-fold reflective airborne imaging display system of claim 1, wherein: The size of the floating image is adjusted by adjusting the equivalent focal length of the curved mirror (4), the object distance, the angle between the display source (1) and the vertical direction, the angle between the plane mirror (2) and the vertical direction, the angle between the beam splitter (3) and the vertical direction, and / or the width of the display source (1); wherein the size of the floating image has the following constraint relationship: wherein is the size of the suspended image; is the equivalent focal length of the curved mirror (4); is the path taken by the light beam emitted by the display source (1) to the curved mirror (4), i.e. the object distance; is the cosine function; is the angle of the display source (1) with the vertical; is the angle of the plane mirror (2) with the vertical; is the angle of the beam splitter (3) with the vertical; is the width of the display source (1).

5. The multi-fold reflective airborne imaging display system of claim 1, wherein: The visual angle of the floating image is adjusted by adjusting the width of the curved mirror (4), the size of the floating image, and / or the distance between the floating image and the aerial imaging display system; wherein the visual angle of the floating image has the following constraint relationship: wherein is the viewing angle of the floating image; is the tangent function; is the width of the curved mirror (4); is the size of the floating image; is the minimum distance of the floating image from the beam splitter (3), i.e. the distance of the floating image from the aerial imaging display system.

6. The multi-fold reflective airborne imaging display system of claim 1, wherein: The width of the curved mirror (4) is related to the focal length with the following constraint relationship: wherein is the width of the curved mirror (4); is the equivalent focal length of the curved mirror (4); focal length of the curved mirror (4) width of the display source (1) width of the floating image has the following constraint relationship: wherein is the minimum distance of the levitated image from the beamsplitter (3), i.e. from the aerial imaging display system; is the thickness of the aerial imaging display system.

7. The multi-fold reflective airborne imaging display system of claim 1, wherein: When the light beam from the curved mirror (4) is horizontally emitted from the light splitter (3), the included angle between the plane mirror (2) and the vertical direction The value range of the included angle between the curved mirror (4) and the vertical direction is respectively 。 8. The multi-fold reflective airborne imaging display system of claim 1, wherein: The vertical distance between the center of the flat mirror (2) and the center of the beam splitter (3) has the following constraint relationship: wherein is the height of the plane mirror (2); is the angle of the plane mirror (2) to the vertical; is the height of the curved mirror (4); is the angle of the curved mirror (4) to the vertical; is the cosine function; The height of the beam splitter (3) is greater than or equal to the height of the curved mirror (4); height of the curved mirror (4) with the following constraint relationship: wherein is the width of the curved mirror (4).

9. The multi-fold reflective airborne imaging display system of claim 1, wherein, The height of the aerial imaging display system is: : wherein is the vertical distance between the center of the display source (1) and the center of the plane mirror (2); is the vertical distance between the center of the plane mirror (2) and the center of the beam splitter (3); is the height of the display source (1); is the height of the beam splitter (3); is the angle between the display source (1) and the vertical direction; is the angle between the beam splitter (3) and the vertical direction; is the cosine function.

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