WO2023274255A1

WO2023274255A1 - Aerial imaging system and aerial imaging-based human-computer interaction system

Info

Publication number: WO2023274255A1
Application number: PCT/CN2022/102026
Authority: WO
Inventors: 张亮亮; 李军昌
Original assignee: 安徽省东超科技有限公司
Priority date: 2021-06-28
Filing date: 2022-06-28
Publication date: 2023-01-05

Abstract

An aerial imaging system (10) and an aerial imaging-based human-computer interaction system (100), the aerial imaging system (10) comprising: a display (11), which is used for emitting image light (L1); and an imaging module (12), which is located on a light path of the image light (L1), which is used for condensing the image light (L1), and which is used for projecting the condensed image light (L1) into the air so as to present a floating real image (20), wherein the imaging module (12) comprises a Fresnel lens (121), and the distance between the display (11) and the Fresnel lens (121) is greater than the focal length of the Fresnel lens (121), so that the floating real image (20) is a real image; or, the imaging module (12) comprises a concave mirror (123), and the distance between the display (11) and the concave mirror (123) is greater than the focal length of the concave mirror (123), so that the floating real image (20) is a real image.

Description

Aerial imaging system and human-computer interaction system based on aerial imaging

technical field

The invention relates to the field of aerial imaging, in particular to an aerial imaging system and a human-computer interaction system based on aerial imaging.

Background technique

The aerial imaging system can directly project a real image into the air to be observed by human eyes without the use of a carrier. Aerial imaging systems include imaging components, and common imaging components include optical waveguide arrays, microlens arrays, and retroreflectors.

The real image formed by the aerial imaging system using the optical waveguide array has the advantages of no distortion and high definition. However, due to the multiple reflections of light in the optical waveguide array, afterimages appear on the left and right sides of the real image. The aerial imaging system using the microlens array is beneficial to reduce the volume of the aerial imaging system, but in order to achieve higher resolution, the size of the sub-lenses in the microlens array needs to be reduced, and the reduction in the size of the sub-lenses will lead to an increase in cost. The cost of aerial imaging system using retroreflector is low, but the loss of light energy is high, the definition is poor, and the imaging brightness is low.

Contents of the invention

The first aspect of the present application provides an aerial imaging system, including:

a display for emitting image light; and

An imaging module, located on the optical path of the image light, is used to converge the image light, and is used to project the converged image light into the air to present a floating real image;

The imaging module includes a Fresnel lens, and the distance between the display and the Fresnel lens is greater than the focal length of the Fresnel lens so that the floating real image is a real image; or, the imaging module includes A concave mirror, the distance between the display and the concave mirror is greater than the focal length of the concave mirror so that the floating real image is a real image.

The second aspect of the present application provides a human-computer interaction system based on aerial imaging, including:

The above-mentioned aerial imaging system is used to project a floating real image;

a sensor for sensing a touch or gesture directed at the floating real image, and generating a sensing signal according to the touch or gesture; and

A controller, connected to the sensor and the display, for receiving the sensing signal, and controlling the display to display an image corresponding to the touch or gesture according to the sensing signal.

The above-mentioned aerial imaging system and the human-computer interaction system based on aerial imaging, the imaging module of the aerial imaging system includes a Fresnel lens or a concave mirror, so that the floating real image formed by the image light is clear, the resolution is high, and the image light Energy loss is small.

Description of drawings

FIG. 1 is a schematic structural diagram of an aerial imaging system according to Embodiment 1 of the present application.

FIG. 2 is another schematic structural diagram of the aerial imaging system according to Embodiment 1 of the present application.

FIG. 3 is another structural schematic diagram of the aerial imaging system according to Embodiment 1 of the present application.

FIG. 4 is another schematic structural diagram of the aerial imaging system according to Embodiment 1 of the present application.

FIG. 5 is a schematic structural diagram of an aerial imaging system according to Embodiment 2 of the present application.

FIG. 6 is another structural schematic diagram of the aerial imaging system according to Embodiment 2 of the present application.

FIG. 7 is a schematic structural diagram of an aerial imaging system according to Embodiment 3 of the present application.

FIG. 8 is another structural schematic diagram of the aerial imaging system according to Embodiment 3 of the present application.

FIG. 9 is another structural schematic diagram of the aerial imaging system according to Embodiment 3 of the present application.

FIG. 10 is another structural schematic diagram of the aerial imaging system according to the third embodiment of the present application.

FIG. 11 is a schematic structural diagram of an aerial imaging system according to Embodiment 4 of the present application.

FIG. 12 is another schematic structural diagram of the aerial imaging system according to Embodiment 4 of the present application.

FIG. 13 is a schematic structural diagram of an aerial imaging system according to Embodiment 5 of the present application.

FIG. 14 is a schematic structural diagram of an aerial imaging system according to Embodiment 6 of the present application.

FIG. 15 is another structural schematic diagram of the aerial imaging system according to Embodiment 6 of the present application.

FIG. 16 is another structural schematic diagram of the aerial imaging system according to Embodiment 6 of the present application.

FIG. 17 is a schematic structural diagram of a human-computer interaction system based on aerial imaging according to Embodiment 7 of the present application.

Description of main component symbols

Aerial Imaging System

10, 30, 40, 50, 60, 70

Display 11

Imaging module 12

Fresnel lens 121

Reflector 122

Concave mirror 123

Half-transparent and half-mirror 124

Image light L1

Optical axis L2

Light-receiving surface S1

Section S2

Geometric center C1, C2

focal length f

Floating real image 20

Human-computer interaction system 100

Sensor 80

Sensing area 810

Controller 90

Windshield 200

Coating area 210

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

detailed description

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, and the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

Embodiment one

Please refer to FIG. 1 , an aerial imaging system 10 can project image light L1 into space to present a suspended floating real image 20 in the air (in air or in a vacuum, etc.), and the suspended floating real image 20 can be observed by human eyes. arrive.

The aerial imaging system 10 of this embodiment includes a display 11 and an imaging module 12 . The display 11 is used to emit image light L1. The imaging module 12 is located on the optical path of the image light L1 for converging the image light L1 and projecting the converging image light L1 into the air to present a floating real image 20 .

In this embodiment, the display 11 is a flat display, such as a liquid crystal flat display device, an organic light emitting flat display device, and the like. When the display 11 is a flat display, the floating real image 20 presented by the aerial imaging system 10 is a two-dimensional planar image. In an alternative embodiment, the display 11 can be a three-dimensional display, for example, it can be a true three-dimensional display realized by using holographic three-dimensional imaging technology, static volume imaging technology, translational volume scanning technology, rotating volume scanning technology, etc. Based on the principle of binocular parallax, a pseudo three-dimensional display is realized by adding a cylindrical microlens array or a slit grating. When the display 11 is a three-dimensional display, the floating real image 20 presented by the aerial imaging system 10 is a three-dimensional stereoscopic image.

In this embodiment, the imaging module 12 includes a Fresnel lens 121 . The Fresnel lens 121 is located on the optical path of the image light L1 for receiving and transmitting the image light L1. The Fresnel lens 121 has a converging effect on the image light L1, and the image light L1 transmitted by the Fresnel lens 121 can be focused to the target position by the Fresnel lens 121, and formed at the target position (the floating real image 20).

In this embodiment, the Fresnel lens 121 has a focal length f, and the distance between the display 11 and the Fresnel lens 121 is greater than the focal length f of the Fresnel lens 121, so that the floating real image 20 at the target position is a real image, which can be observed by the human eye. When the distance between the display 11 and the Fresnel lens 121 is between one focal length and twice the focal length of the Fresnel lens 121, the target position outside the two focal lengths of the Fresnel lens 121 is compared with the display 11 The enlarged floating real image 20 is displayed, as shown in FIG. 1 . Wherein the display 11 and the target position are respectively located on different sides of the Fresnel lens 121 . When the display 11 was at twice the focal length of the Fresnel lens 121, a floating real image 20 equal in size to the displayed image of the display 11 was formed at the target position of the double focal length of the Fresnel lens 121, as shown in Figure 2 . When the distance between the display 11 and the Fresnel lens 121 is greater than twice the focal length of the Fresnel lens 121, the display image is compared with the display 11 at a target position between one to twice the focal length of the Fresnel lens 121 The reduced floating real image 20 is shown in FIG. 3 . Therefore, the position and size of the floating real image 20 can be adjusted by adjusting the distance between the display 11 and the Fresnel lens 121 .

According to the imaging characteristics of the Fresnel lens 121, when the distance between the display 11 and the Fresnel lens 121 is greater than one times the focal length f, the object distance (the distance between the display 11 and the Fresnel lens 121) is larger, and the image The smaller the distance (the distance between the floating real image 20 and the Fresnel lens 121 ), the smaller the size of the floating real image 20 . Referring to Fig. 4, when the floating real image 20 is a stereoscopic image, the floating real image 20 can be regarded as a collection of several two-dimensional images, if the display area of the display 11 is a cuboid shape (that is, the image displayed by the display 11 is Rectangular image), the three-dimensional floating real image 20 will present the shape of a trapezoidal groove as a whole, that is, in the direction away from the Fresnel lens 121, the size of the two-dimensional image gradually becomes larger, causing the three-dimensional floating real image 20 to be pulled Distortion occurs. The above shape change can be improved by increasing the focal length of the Fresnel lens 121 or reducing the area of the display area of the display 11 .

The smaller the focal length of the imaging module 12, the more serious the distortion of the floating real image 20 during imaging, so in order to obtain the less distorted floating real image 20, the focal length of the Fresnel lens 121 in the imaging module 12 should be increased, but the The focal length of the Fresnel lens 121 will cause the optical path of the image light L1 to be longer, resulting in a larger overall volume of the aerial imaging system 10 . Therefore, in order to obtain the floating real image 20 with less distortion, the volume of the aerial imaging system 10 often increases. In a modified embodiment of this embodiment, the imaging module 12 may include a plurality of Fresnel lenses 121 . A plurality of Fresnel lenses 121 form a lens group, and the optical axes of the Fresnel lenses 121 in the lens group coincide, so that the whole lens group has a focal length. The overall focal length of the lens group can be adjusted by adjusting the focal length of any Fresnel lens 121 in the lens group and the distance between multiple Fresnel lenses 121 . By adjusting the focal length of any Fresnel lens 121 in the lens group and the distance between multiple Fresnel lenses 121, the focal length of the entire lens group is smaller than the focal length of any Fresnel lens in the lens group. Therefore, by adopting the lens group, the focal length of the lens group as a whole can be kept small on the basis of keeping the focal length of each Fresnel lens 121 in the lens group relatively large, and the distortion of the floating real image 20 can be maintained on the basis of small distortion. The optical path of the image light L1 is short, and the volume of the aerial imaging system 10 is small. Therefore, this modified embodiment is beneficial to reduce the volume of the aerial imaging system 10 by using the lens group. As shown in FIGS. 1-4 , the aerial imaging system 10 adopts a Fresnel lens 121 , since the image light L1 passes through fewer optical elements, it is beneficial to reduce light loss and improve light utilization efficiency.

The aerial imaging system 10 of the present embodiment includes a Fresnel lens 121 as an imaging element in the imaging module 12, so that the floating real image 20 formed according to the image light L1 can be imaged clearly and has high resolution, and the light energy loss of the image light L1 is relatively small. small.

Embodiment two

Please refer to FIG. 5 , the main difference between the aerial imaging system 30 of this embodiment and the first embodiment is that in the aerial imaging system 30 , the imaging module 12 further includes at least one mirror 122 . In the following, a reflective mirror 122 is used as an example for illustration. When the aerial imaging system 30 includes a mirror 122, the mirror 122 is located on the optical path of the image light L1. The mirror 122 is used to reflect the received image light L1 to change the transmission direction of the image light L1, that is, to change the optical path of the image light L1. The reflection mirror 122 is a metal-coated or dielectric film reflection mirror. When the reflector 122 is an aluminum-plated reflector, it is beneficial to save costs.

The mirror 122 can be arranged at different positions on the optical path of the image light L1, for example, in the aerial imaging system 30 shown in FIG. The light L1 is reflected to the Fresnel lens 121 . Or for example, in the aerial imaging system 30 shown in FIG. 6 , the reflector 122 is located between the Fresnel lens 121 and the floating real image 20, and is used to reflect the image light L1 emitted by the Fresnel lens 121 to the target position to display the floating image. Real image 20.

When the reflector 122 is not included in the aerial imaging system 30, the display 11 is located on the optical axis L2 of the Fresnel lens 121 (see FIGS. axis L2, so that in the extension direction of the optical axis L2 of the Fresnel lens 121, the size of the aerial imaging system 30 is larger. However, in this embodiment, taking FIG. 5 as an example, the optical path of the image light L1 is changed by the reflection of the reflector 122. The display 11 is not located on the optical axis L2 of the Fresnel lens 121, and the image light L1 emitted by it can also be detected. Mirror 122 leads to Fresnel lens 121 . In this modified embodiment, the position of the display 11 reuses the space perpendicular to the optical axis L2, so that in the extension direction of the optical axis L2 of the Fresnel lens 121, the size of the aerial imaging system 30 is reduced.

The aerial imaging system 30 of this embodiment can realize all the beneficial effects as described in the first embodiment. On this basis, changing the optical path of the image light L1 through the reflection of the mirror 122 is beneficial to reducing the size of a certain dimension of the aerial imaging system 30 , thereby reducing the overall volume of the aerial imaging system 30 .

Embodiment Three

Please refer to FIG. 7 , the main difference between the aerial imaging system 40 of this embodiment and the first and second embodiments is that in the aerial imaging system 40 , the imaging module 12 includes a concave mirror 123 instead of a Fresnel lens. The concave mirror 123 is used to receive and focus the image light L1, and is also used to reflect the focused image light L1.

The concave mirror 123 includes a light receiving surface S1. The light receiving surface S1 is a spherical or parabolic surface for receiving, focusing and reflecting the image light L1. When the light receiving surface S1 is a spherical surface, the floating real image 20 will be distorted, and the distortion can be reduced by increasing the focal length of the concave mirror 123 . When the light-receiving surface S1 of the concave mirror 123 is a parabolic surface, the imaging distortion of the light-receiving surface S1 is smaller than when the light-receiving surface S1 is a spherical surface, but when the light-receiving surface S1 is a spherical surface, it is beneficial to reduce the manufacturing cost of the concave mirror 123 .

Regardless of whether the light-receiving surface S1 is spherical or parabolic, after receiving and reflecting the image light L1 , the floating real image 20 displayed by the image light L1 will be distorted to a certain extent. Therefore, the aerial imaging system 40 of this embodiment further includes a half mirror 124 . The half mirror 124 is located on the optical path of the image light L1, and is used to receive the image light L1 emitted by the display 11 and reflect the image light L1 emitted by the display 11 to the light receiving surface S1, and is also used to receive the image light reflected by the reflecting surface S1 L1 transmits the image light L1 reflected by the reflective surface S1. That is, the half mirror 124 is used to adjust the angle at which the image light L1 emitted from the display 11 is incident on the light receiving surface S1 .

Referring to FIG. 8 , the light receiving surface S1 has a geometric center C1 , and the light receiving surface S1 has a tangent plane S2 passing through the geometric center C1 . The half mirror 124 has a geometric center C2, and the line connecting the geometric center C1 and the geometric center C2 is perpendicular to the tangent plane S2, that is, the geometric center C1 and the geometric center C2 are located on the optical axis L2 of the concave mirror 123. There is an included angle between the half mirror 124 and the cut surface S2, and the included angle is 45°. A line connecting the geometric center of the display 11 and the geometric center C2 of the half mirror 124 is perpendicular to the optical axis L3.

The image light L1 emitted by the display 11 is incident on the half-mirror 124, and is reflected by the half-mirror 124 to the light-receiving surface S1, and the ray passing through the geometric center C2 in the image light L1 is incident on the light-receiving surface S1 perpendicular to the section S2; That is, the light rays passing through the geometric center C2 of the image light L1 are incident on the geometric center C1 of the light receiving surface S1 . In this way, the distortion of the floating real image 20 displayed by the image light L1 reflected by the light receiving surface S1 back to the half mirror 124 is small.

The distance between the geometric center of the display 11 and the geometric center C2 of the half-mirror 124 is greater than one time of the focal length f of the concave mirror 123, so that the floating real image 20 formed by the image light L1 can be a real image. When the distance between the geometric center of the display 11 and the geometric center C2 of the half mirror 124 is between one focal length and twice the focal length of the concave mirror 123, the floating real image 20 is an enlarged image compared with the display image of the display 11, As shown in Figure 8. When the distance between the geometric center of the display 11 and the geometric center C2 of the half mirror 124 is twice the focal length of the concave mirror 123, the floating real image 20 is a larger image than the displayed image of the display 11, as shown in Figure 9 . When the distance between the geometric center of the display 11 and the geometric center C2 of the half mirror 124 is greater than twice the focal length of the concave mirror 123, the floating real image 20 is a smaller image than the image displayed on the display 11, as shown in FIG. 10 .

The aerial imaging system 40 of this embodiment includes a concave mirror 123 as an imaging element in the imaging module 12, so that the floating real image 20 formed by the image light L1 is clearly imaged, with high resolution, and the light energy loss of the image light L1 is small.

Embodiment Four

Please refer to FIG. 11 , the main difference between the aerial imaging system 50 of this embodiment and the first embodiment is that in the aerial imaging system 30 , the imaging module 12 further includes at least one mirror 122 . In the following, a reflective mirror 122 is used as an example for illustration. When the aerial imaging system 50 includes a mirror 122, the mirror 122 is located on the optical path of the image light L1. The mirror 122 is used to reflect the received image light L1 to change the transmission direction of the image light L1 , that is, to change the optical path of the image light L1 . The reflection mirror 122 is a metal-coated or dielectric film reflection mirror. When the reflector 122 is an aluminum-plated reflector, it is beneficial to save costs.

The mirror 122 can be arranged at different positions on the optical path of the image light L1, for example, in the aerial imaging system 50 shown in FIG. The image light L1 is reflected to the half mirror 124 . Or for example, in the aerial imaging system 50 shown in FIG. 12 , the mirror 122 is located between the half mirror 124 and the floating real image 20, for reflecting the image light L1 transmitted by the half mirror 124 to the target position for display Floating real image 20.

See also Fig. 10, reflector 122 is not included in the aerial imaging system 30 of embodiment three, in order to display floating real image 20, aerial imaging system 40 is in horizontal direction (with Fig. 10 as the horizontal direction) and vertical direction (with Fig. 10 as the reference vertical direction) is larger in size. In the present embodiment, taking FIG. 11 as an example, the reflection of the reflector 122 between the display 11 and the half mirror 124 changes the distance between the display 11 and the half mirror 124 of the image light L1. The optical path reduces the distance between the display 11 and the half-mirror 124 in the vertical direction (the vertical direction based on FIG. 11 ), that is, reduces the size of the aerial imaging system in the vertical direction. Taking Fig. 12 as an example, by the reflection of the mirror 122 between the half mirror 124 and the floating real image 20, the optical path of the image light L1 between the half mirror 124 and the floating real image 20 is changed, In the horizontal direction (the horizontal direction based on FIG. 12 ), the distance between the half mirror 124 and the floating real image 20 is reduced, that is, the size of the aerial imaging system in the horizontal direction is reduced.

The aerial imaging system 50 of this embodiment can realize all the beneficial effects as described in the third embodiment. On this basis, the aerial imaging system 50 in this embodiment changes the optical path of the image light L1 through the reflection of the mirror 122, which is conducive to reducing the size of a certain dimension of the aerial imaging system, thereby reducing the overall cost of the aerial imaging system. volume.

Embodiment five

Referring to Fig. 13, the main difference between the aerial imaging system 60 of the present embodiment and the third embodiment is that the light-receiving surface S1 of the concave mirror 123 is an ellipsoid or a free-form surface, and the aerial imaging system 60 does not include the half-transparent mirror 124 . Other structures in the aerial imaging system 60 are basically the same as those in the third embodiment, and the following part of this embodiment mainly describes the above-mentioned differences.

When the light-receiving surface S1 of the concave mirror 123 is an ellipsoid, according to the characteristics of the ellipsoid, the light emitted through one focal point will always converge at the other focal point, and then the display 11 is placed at a focal point of the concave mirror 123 (the geometry of the display 11 The center is located at one focal point of the concave mirror 123), and the floating real image 20 will be observed at the other focal point. And by reducing the curvature of the light-receiving surface S1 of the concave mirror 123 or reducing the size of the display 11 , the distortion of the floating real image 20 can be reduced.

When the light-receiving surface S1 of the concave mirror 123 is a free-form surface, it is necessary to design the surface shape of the light-receiving surface S1, which is conducive to obtaining a floating real image 20 with less distortion, but the use of an ellipsoidal light-receiving surface S1 is conducive to saving the cost of the concave mirror 123. Production costs.

The aerial imaging system 60 of this embodiment can realize all the beneficial effects described in the third embodiment.

Embodiment six

Please refer to FIG. 14 , the main difference between the aerial imaging system 70 of this embodiment and the fifth embodiment is that: in the aerial imaging system 70 , the imaging module 12 further includes at least one mirror 122 . In the following, a reflective mirror 122 is used as an example for illustration. When the aerial imaging system 70 includes a mirror 122, the mirror 122 is located on the optical path of the image light L1. The mirror 122 is used to reflect the received image light L1 to change the transmission direction of the image light L1 , that is, to change the optical path of the image light L1 . The reflection mirror 122 is a metal-coated or dielectric film reflection mirror. When the reflector 122 is an aluminum-plated reflector, it is beneficial to save costs.

The mirror 122 can be arranged at different positions on the optical path of the image light L1, for example, in the aerial imaging system 70 shown in FIG. The image light L1 is reflected to the target position to display the floating real image 20 . Or, for example, in the aerial imaging system 70 shown in FIG. 15 , the mirror 122 is located between the concave mirror 123 and the display 11 for reflecting the image light L1 emitted by the display 11 to the light-receiving surface S1 of the concave mirror 123 .

Please refer to FIG. 16. Taking the aerial imaging system 70 in FIG. 15 as an example, when the aerial imaging system 70 is applied to the scene of the head-up display of a car, the floating real image 20 displayed by the aerial imaging system 70 is suspended in the space inside the car. , which can be observed and operated (touch or gesture) by the driver in the car. In the above scenario, there is a coating area 210 on the windshield 200 of the car, and the coating area 210 is coated with an antireflection film, and the image light L1 reflected from the concave mirror 123 is incident on the coating area 210, and is reflected by the coating area 210 to the target position A floating real image 20 is displayed.

The aerial imaging system 70 of this embodiment can realize all the beneficial effects as described in the fourth embodiment. On this basis, similar to the mirror 122 in the second embodiment, the aerial imaging system 70 in this embodiment changes the optical path of the image light L1 through the reflection of the mirror 122, which is beneficial to reduce a certain dimension of the aerial imaging system size, thereby reducing the overall volume of the aerial imaging system.

Embodiment seven

Please refer to FIG. 17 , the aerial imaging-based human-computer interaction system 100 provided in this embodiment includes the aerial imaging system in any of the above-mentioned embodiments. The human-computer interaction system 100 also includes a sensor 80 and a controller 90 . The controller 90 is respectively connected to the sensor 80 and the display 11 in the aerial imaging system.

The sensor 80 is used for sensing a touch or gesture on the floating real image 20 and generating a sensing signal according to the touch or gesture. The controller 90 is used to receive the sensing signal, and to control the display 11 to display an image corresponding to the touch or gesture according to the sensing signal.

The sensor 80 is an optical sensor, including but not limited to far and near infrared, ultrasonic, laser interference, grating, encoder, fiber optic or charge-coupled device, and the like. The best sensor type can be selected according to the installation space, viewing angle and use environment, so that the user can view or operate the floating real image 20 with the best posture, and improve the sensitivity and convenience of the user's operation. The controller 90 can be a control chip, a control chipset, or a computer host. The controller 90 and the sensor 80 can be connected in a wired or wireless manner to transmit digital or analog signals (that is, the sensing signal is a digital or analog signal), so that the volume of the human-computer interaction system 100 can be flexibly controlled.

When the floating real image 20 is projected into the air, the user's hand can operate on the floating real image, such as touch or gesture. The sensor 80 has a sensing area 810 , and the sensing area 810 of the sensor 80 is located on the same plane as the floating real image 20 or includes the three-dimensional space where the floating real image 20 is located. When the user's hand touches the floating real image 20 , the sensor 80 can sense the touch position and feed back the touch position to the controller 90 , and the controller 90 controls the display 11 to display corresponding images according to the touch position. When the user's hand makes a gesture (such as drawing a circle) at a certain distance from the floating real image 20, the sensor 80 can sense the gesture information and feed back the gesture information to the controller 90, and the controller 90 controls the display 11 according to the gesture information The corresponding image is displayed.

The human-computer interaction system 100 based on aerial imaging in this embodiment includes the aerial imaging system (10, 30, 40, 50, 60, 70) in any of the above-mentioned embodiments, and can realize the aerial imaging system in any of the above-mentioned embodiments. Beneficial Effects of Imaging Systems.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Alterations and variations are within the scope of the claimed invention.

Claims

An aerial imaging system is characterized in that it comprises:

a display for emitting image light; and

An imaging module, located on the optical path of the image light, is used to converge the image light, and is used to project the converged image light into the air to present a floating real image;

The imaging module includes a Fresnel lens, and the distance between the display and the Fresnel lens is greater than the focal length of the Fresnel lens so that the floating real image is a real image; or, the imaging module includes A concave mirror, the distance between the display and the concave mirror is greater than the focal length of the concave mirror so that the floating real image is a real image.
The aerial imaging system according to claim 1, wherein when the imaging module includes the Fresnel lens, the distance between the display and the Fresnel lens can be adjusted. Describe the position and size of the floating real image.
The aerial imaging system according to claim 1, wherein the imaging module further comprises at least one reflector, the reflector is located on the optical path of the image light, and is used to change the transmission direction of the image light .
The aerial imaging system according to claim 3, wherein when the imaging module includes the Fresnel lens, the at least one mirror is located between the display and the Fresnel lens, used to reflect the image light emitted by the display to the Fresnel lens.
The aerial imaging system according to claim 3, wherein when the imaging module includes the Fresnel lens, the at least one mirror is located between the Fresnel lens and the floating real image and reflect the image light emitted by the Fresnel lens to a target position to display the floating real image.
The aerial imaging system according to claim 1, wherein when the imaging module includes the Fresnel lens, the geometric center of the display is located on the optical axis of the Fresnel lens.
The aerial imaging system according to claim 1, wherein the imaging module includes a plurality of Fresnel lenses, and the plurality of Fresnel lenses are used to jointly receive and transmit the image light;

Optical axes of the plurality of Fresnel lenses coincide.
The aerial imaging system according to claim 1, wherein when the imaging module includes a concave mirror, the concave mirror includes a light-receiving surface, and the light-receiving surface is used to receive and reflect the image light, and the The light-receiving surface is spherical or parabolic;

The imaging module also includes a half-mirror, and the half-mirror is used for reflecting the image light emitted by the display to the light-receiving surface so as to be reflected by the light-receiving surface, and for transmitting the light-receiving surface. Image light reflected by the surface.
The aerial imaging system according to claim 8, wherein the geometric center of the light-receiving surface has a tangent plane, and the half mirror and the tangent plane have an included angle of 45 degrees.
The aerial imaging system according to claim 8, wherein the geometric center of the light-receiving surface has a tangent plane, and the image light incident on the geometric center is perpendicular to the tangent plane.
The aerial imaging system according to claim 1, wherein when the imaging module includes a concave mirror, the concave mirror includes a light-receiving surface, and the light-receiving surface is used to receive and reflect the image light, and the The light-receiving surface is an ellipsoid or a free-form surface.
11. The aerial imaging system of claim 11, wherein the display is located at the focal point of the geometric center of the concave mirror.
The aerial imaging system according to any one of claims 1-12, wherein the display is a flat display, and the floating real image is a two-dimensional image.
The aerial imaging system according to any one of claims 1-12, wherein the display is a three-dimensional display, and the floating real image is a stereoscopic image.
A human-computer interaction system based on aerial imaging, characterized in that it includes:

The aerial imaging system according to any one of claims 1-14, used for projecting a floating real image;

a sensor for sensing a touch or gesture directed at the floating real image, and generating a sensing signal according to the touch or gesture; and

A controller, connected to the sensor and the display, for receiving the sensing signal, and controlling the display to display an image corresponding to the touch or gesture according to the sensing signal.