Aerial imaging device and interaction system

Abstract

The utility model is suitable for the technical field of aerial imaging, and provides an aerial imaging device and an interaction system, and the aerial imaging device comprises a housing, an air imaging plate, a concave mirror and an image display. The shell is provided with an inner cavity, a light outlet communicated with the inner cavity is further formed in the shell, and the air imaging plate covers the light outlet. The concave mirror is installed in the inner cavity, and a quasi-total reflection concave surface is formed on the side, facing the light outlet, of the concave mirror. The image display is mounted in the inner cavity, is provided with a light-emitting surface, is used for generating image information and is positioned on one side, close to the light outlet, of the concave mirror, and the light-emitting surface faces the concave mirror. The quasi-total reflection concave surface can reflect most of light from the light-emitting surface to the air imaging plate, so that the effect similar to total reflection is achieved, the reflection and refraction times of the most of light can be reduced, the light energy loss is reduced, and the definition and the brightness of image information formed in the outside air are effectively improved.

Description

Technical Field

[0001] This application relates to the field of aerial imaging technology, and more specifically, to an aerial imaging device and an interaction system. Background Art

[0002] An aerial imaging device is a device that directly generates an image in the air without relying on any physical screen or other medium. Common aerial imaging devices include holographic projection devices, fog screen imaging devices, and interactive aerial imaging devices, etc. Among them, the interactive aerial imaging device can realize the function of direct interaction between people and the aerial image, so it is applied to many fields such as entertainment, education, medical treatment, and public facilities.

[0003] Currently, most interactive aerial imaging devices on the market mainly consist of a retroreflective plate, an air imaging plate, and a light source. The light source emits light to the air imaging plate, and then the air imaging plate reflects the light to the retroreflective plate. Finally, the retroreflective plate reflects the light source back to the air imaging plate along the original path, so that the light passes through the air imaging plate and converges in the external air to form an image. As can be seen from the above, in the currently common interactive aerial imaging devices, the light emitted by the light source needs to be reflected and refracted multiple times before it can form an image in the air. The light energy loss is relatively high during the multiple reflections and refractions of the light, resulting in a relatively low clarity and brightness of the finally formed image in the air. Utility Model Content

[0004] The purpose of the embodiments of this application is to provide an aerial imaging device and an interaction system, aiming to solve the technical problem of relatively low clarity and brightness of aerial imaging devices in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in this application is: to provide an aerial imaging device, including:

[0006] A housing having an inner cavity, and the housing further forms a light outlet communicating with the inner cavity;

[0007] An air imaging plate covering the light outlet;

[0008] A concave mirror installed in the inner cavity, and a quasi-total reflection concave surface is formed on the side of the concave mirror facing the light outlet;

[0009] An image display installed in the inner cavity, the image display has a light-emitting surface, the image display is used to generate image information, the image display is located on the side of the concave mirror close to the light outlet, and the light-emitting surface is arranged facing the concave mirror;

[0010] The light-emitting surface is configured to emit light containing the image information to the quasi-total reflection concave surface, and the quasi-total reflection concave surface is configured to reflect the light from the light-emitting surface to the air imaging plate, so that the light is emitted to the outside through the air imaging plate and forms the image information in the air outside.

[0011] In a possible design, the housing includes a bottom plate, a first side plate, and a second side plate surrounding the outer periphery of the inner cavity. The bottom plate is arranged parallel to the first direction. The first side plate and the second side plate are arranged on the same side of the bottom plate. The first side plate is arranged perpendicular to the first direction, and the second side plate is respectively arranged at an acute angle with the first side plate and the bottom plate.

[0012] The concave mirror is installed on the side of the first side plate facing the second side plate. The light outlet is provided through the second side plate. The image display is installed on the bottom plate. The light-emitting surface is arranged obliquely with respect to the bottom plate, and the side of the light-emitting surface close to the concave mirror is closer to the bottom plate than the side of the light-emitting surface far from the concave mirror.

[0013] In a possible design, the second side plate and the bottom plate are spaced apart in a second direction perpendicular to the first direction. The housing further includes an extension plate and a first connecting plate. The extension plate is arranged parallel to the bottom plate and connected to the side of the second side plate far from the first side plate in the first direction. The extension plate and the bottom plate are connected by the first connecting plate. The extension plate, the first connecting plate, and the bottom plate enclose an extension cavity, and the extension cavity communicates with the inner cavity. In the first direction, the image display is located on the side of the light outlet far from the concave mirror, and the extension cavity is used to accommodate at least part of the structure of the image display.

[0014] In a possible design, the principal axis of the quasi-total reflection concave surface is parallel to the first direction.

[0015] In a possible design, the light-emitting surface is arranged at a first included angle with the bottom plate, and the angle range of the first included angle is 25 degrees to 35 degrees.

[0016] In a possible design, on the projection plane perpendicular to the first direction, the projection of the quasi-total reflection concave surface and the projection of the air imaging plate at least partially overlap.

[0017] In a possible design, the cross-sectional shape of the quasi-total reflection concave surface is one of an arc line, a parabola, and a free curve.

[0018] In a possible design, the side surface of the concave mirror facing away from the light outlet is a plane.

[0019] The present application also provides an interaction system, including a manipulation recognition device, a control device, and the aerial imaging device provided by any of the above technical solutions. The manipulation recognition device and the control device are both installed on the housing. The control device is respectively connected to the image display and the manipulation recognition device in a signal manner; an induction area is formed in the air by the manipulation recognition device, and the induction area at least covers the area where the aerial imaging device forms the image information in the external air.

[0020] The image display is used to feedback the image information to the control device. The manipulation recognition device is used to obtain the position data of the operation object in the induction area and feedback it to the control device. The control device is used to perform analysis and calculation on the image information feedback by the image display and the position data feedback by the manipulation recognition device to obtain the control instruction of the operation object.

[0021] In a possible design, an extension cavity is formed in the housing of the aerial imaging device, and the control device is installed in the extension cavity.

[0022] The beneficial effects of the aerial imaging device provided by the present application are as follows: Compared with the prior art, the aerial imaging device provided by the present application, by providing a concave mirror with a quasi-total reflection concave surface, and respectively making the light-emitting surface of the image display and the light outlet covered with the air imaging plate face the quasi-total reflection concave surface, so that the light emitted from the light-emitting surface can be directly projected onto the quasi-total reflection concave surface. The quasi-total reflection concave surface can reflect most of the light from the light-emitting surface to the air imaging plate to achieve an effect similar to total reflection, and can reduce the number of reflections and refractions of most of the light, thereby reducing the light energy loss. In this way, when the light emitted from the light-emitting surface is reflected by the total reflection concave surface to the air imaging plate, passes through the air imaging plate and exits to the outside (the outside of the housing), and forms the image information generated by the image display in the external air, the clarity and brightness of the image information formed in the external air can be effectively improved.

[0023] In addition, the concave mirror can also reduce the optical error caused by manufacturing errors, help reduce the distortion of the image information, reduce the aberration phenomenon, and improve the geometric accuracy of the image information formed in the air, that is, improve the clarity and accuracy of the image information. In particular, it can improve the clarity of the edge and high-contrast area of the image information, so that the aerial imaging device provided by the embodiments of the present application can still present a relatively clear image in a bright environment. And the thickness of the central area of the concave mirror is relatively thin. Using the concave mirror can reduce the weight and volume of the aerial imaging device, improve the portability of the aerial imaging device, and enrich the application scenarios of the aerial imaging device.

[0024] The beneficial effects of the interaction system provided by this application are as follows: Compared with the prior art, since the interaction system provided by this application includes the aerial imaging device provided by any of the above technical solutions, it has at least all of the above beneficial effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a partial structural schematic diagram of the interaction system provided by an embodiment of this application;

[0027] Figure 2 It is a cross-sectional structural schematic diagram of a part of the interaction system provided by an embodiment of this application;

[0028] Figure 3 It is a schematic diagram of the propagation path of light when passing through the air imaging plate in the aerial imaging device provided by an embodiment of this application.

[0029] The label details involved in the above drawings are as follows:

[0030] 101, inner cavity; 102, light outlet; 110, bottom plate; 111, mounting table; 112, mounting seat; 1121, first mounting groove; 120, first side plate; 130, second connecting plate; 131, second mounting groove; 140, second side plate; 150, extension plate; 160, first connecting plate; 170, mounting plate;

[0031] 200, air imaging plate; 300, concave mirror; 310, quasi-total reflection concave surface; 400, control and recognition device; 500, virtual screen; 600, image display; 610, light-emitting surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further elaborates on this application in combination with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0033] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0036] In order to illustrate the technical solutions described in the present application, the following will be described in detail with reference to specific drawings and embodiments.

[0037] As Figure 1 and Figure 2 shown, an embodiment of the present application provides an aerial imaging device, including a housing, an air imaging panel 200, a concave mirror 300, and an image display 600. The housing has an inner cavity 101, and the housing further forms a light outlet 102 communicating with the inner cavity 101. The air imaging panel 200 covers the light outlet 102. The concave mirror 300 is installed in the inner cavity 101, and a quasi-total reflection concave surface 310 is formed on the side of the concave mirror 300 facing the light outlet 102. The image display 600 is installed in the inner cavity 101. The image display 600 has a light-emitting surface 610. The image display 600 is used to generate image information. The image display 600 is located on the side of the concave mirror 300 close to the light outlet 102, and the light-emitting surface 610 faces the concave mirror 300. Please refer to Figure 2 , Figure 2 The dotted arrows in show the propagation path of light. The light-emitting surface 610 is used to emit the light containing image information to the quasi-total reflection concave surface 310. The quasi-total reflection concave surface 310 is used to reflect the light from the light-emitting surface 610 to the air imaging panel 200, so that the light is emitted to the outside through the air imaging panel 200 and forms image information in the outside air.

[0038] The aerial imaging device provided by the embodiment of the present application is provided with a concave mirror 300 having a quasi-total reflection concave surface 310, and the light-emitting surface 610 of the image display 600 and the light-emitting port 102 covered with the aerial imaging plate 200 are respectively opposite to the quasi-total reflection concave surface 310, so that the light emitted from the light-emitting surface 610 can be directly projected onto the quasi-total reflection concave surface 310. The quasi-total reflection concave surface 310 can reflect most of the light from the light-emitting surface 610 to the aerial imaging plate 200 to achieve an effect similar to total reflection, reduce the number of reflections and refractions of most of the light, and thus reduce the light energy loss. In this way, when the light emitted from the light-emitting surface 610 is reflected by the total reflection concave surface to the aerial imaging plate 200 and passes through the aerial imaging plate 200 and is emitted to the outside (the outside of the housing), after forming the image information generated by the image display 600 in the outside air, the clarity and brightness of the image information formed in the outside air can be effectively improved.

[0039] In addition, the concave mirror 300 can also reduce the optical error caused by manufacturing errors, help reduce the distortion of the image information, reduce the aberration phenomenon, and improve the geometric accuracy of the image information formed in the air, that is, improve the clarity and accuracy of the image information. In particular, it can improve the clarity of the edge and high-contrast region of the image information, so that the aerial imaging device provided by the embodiment of the present application can still present a relatively clear image in a bright environment. At the same time, the manufacturing difficulty and production cost can be reduced. Moreover, the thickness of the central region of the concave mirror 300 is relatively thin. Using the concave mirror 300 can reduce the weight and volume of the aerial imaging device, improve the portability of the aerial imaging device, and enrich the application scenarios of the aerial imaging device.

[0040] In the manufacturing process, the concave mirror 300 can be first subjected to simulation analysis according to actual requirements to obtain the curvature of the quasi-total reflection concave surface 310 that meets the requirements, and the error analysis of the concave mirror 300 can be carried out. The quasi-total reflection concave surface 310 can be processed by fine polishing or electroplating and other processing methods using CNC (Computerized Numerical Control), so as to obtain a concave mirror 300 that meets the requirements.

[0041] Optionally, the image display 600 with a corresponding size can be selected or manufactured according to the size of the aerial image to be formed. Optionally, a housing with a suitable shape and size can be designed or selected according to the size and installation position of the image display 600 and the concave mirror 300.

[0042] Optionally, the air imaging plate 200 specifically refers to an optical structure that can allow light to pass through. In one example, the air imaging plate 200 is a polarizer, and the polarizer can specifically be a reflective polarizer or other types of polarizers. The polarization axis direction of the air imaging plate 200 is perpendicular to the polarization direction of the linearly polarized light. The image display 600 is specifically a display that can emit linearly polarized light, that is, the light emitted from the light-emitting surface 610 of the image display 600 is linearly polarized light. For example, the image display 600 can be an LCD (Liquid Crystal Display), an LCOS (Liquid Crystal on Silicon) device, or an OLED (Organic Light-Emitting Diode) array, etc. When the linearly polarized light emitted from the light-emitting surface 610 is projected onto the quasi-total reflection concave surface 310, the linearly polarized light is totally reflected by the quasi-total reflection concave surface 310 and changes its polarization direction, so that the polarization direction of the linearly polarized light is parallel to the polarization axis of the air imaging plate 200, thereby enabling a large amount of light to pass through the air imaging plate 200 and be emitted to the outside of the housing, so as to further improve the clarity and brightness of the aerial imaging device in aerial imaging.

[0043] In another example, the air imaging plate 200 can also be other optical structures with refractive functions. For example, the air imaging plate 200 can be a lens. Specifically, the air imaging plate 200 can be a negative refractive flat lens, and when light is emitted to this type of air imaging plate 200, a negative refraction phenomenon will occur. The negative refraction phenomenon specifically refers to when light is incident from a material with a positive refractive index to the interface of a material with a negative refractive index, the incident light and the refracted light are on the same side of the interface. As Figure 3 shown, the straight line L1 refers to the incident light emitted from the light-emitting surface 610 and reflected by the quasi-total reflection concave surface 310 to the air imaging plate 200, the straight line L2 is the negative refracted light with the air imaging plate 200 as the interface, and the dotted line L3 is the normal line with the air imaging plate 200 as the interface.

[0044] In a possible design, as Figure 1 or Figure 2As shown in the figure, the housing includes a bottom plate 110, a first side plate 120, and a second side plate 140 that surround the outer periphery of the inner cavity 101. Any two of the bottom plate 110, the first side plate 120, and the second side plate 140 can be directly or indirectly connected. The bottom plate 110 is arranged parallel to the first direction. The first side plate 120 and the second side plate 140 are arranged on the same side of the bottom plate 110. The first side plate 120 is arranged perpendicular to the first direction, and the second side plate 140 is arranged at an acute angle to both the first side plate 120 and the bottom plate 110. The concave mirror 300 is installed on one side of the first side plate 120 facing the second side plate 140. The light outlet 102 is disposed through the second side plate 140. The image display 600 is installed on the bottom plate 110. The light-emitting surface 610 is inclined with respect to the bottom plate 110. The side of the light-emitting surface 610 close to the concave mirror 300 is closer to the bottom plate 110 than the side of the light-emitting surface 610 far from the concave mirror 300. Such an arrangement is to facilitate the light emitted from the light-emitting surface 610 to be directly projected onto the quasi-total reflection concave surface 310. In this embodiment, the bottom plate 110, the first side plate 120, and the second side plate 140 surround the outer periphery of the inner cavity 101. It can be understood that the plane where the bottom plate 110 is located, the plane where the first side plate 120 is located, and the plane where the second side plate 140 is located surround and form a triangular prism area, and the inner cavity 101 is located in this triangular prism area. Specifically, the second side plate 140 has a first side close to the bottom plate 110 and a second side far from the bottom plate 110. The distance between the first side of the second side plate 140 and the first side plate 120 is greater than the distance between the second side and the first side plate 120. In this way, the second side plate 140 is arranged at an acute angle to both the first side plate 120 and the bottom plate 110. Since the light outlet 102 is disposed through the second side plate 140, the air imaging plate 200 covering the light outlet 102 is also arranged at an acute angle to both the first side plate 120 and the bottom plate 110, so that the light emitted from the light-emitting surface 610 can be smoothly reflected by the quasi-total reflection concave surface 310 to the air imaging plate 200 at the light outlet 102 and pass through the air imaging plate 200 to form image information on the side of the air imaging plate 200 away from the inner cavity 101 (the outside air). Optionally, the second side plate 140 is arranged at a 45-degree angle to both the first side plate 120 and the bottom plate 110.

[0045] In the embodiment of the present application, the first direction can be the horizontal direction, the vertical direction, or any other arbitrary direction. For the convenience of description, the horizontal direction is taken as an example for illustration in the following text. When the first direction is the horizontal direction, as Figure 1 or Figure 2 shown, the bottom plate 110 is horizontally arranged. The first side plate 120 and the second side plate 140 are both located above the bottom plate 110. The side of the air imaging plate 200 on the second side plate 140 away from the inner cavity 101 faces the obliquely upward direction. In this way, it is convenient for the observer to view the displayed image.

[0046] In some embodiments, any two of the bottom plate 110, the first side plate 120, and the second side plate 140 can be directly connected. Exemplarily, the bottom plate 110 is connected to the first side plate 120, one side of the bottom plate 110 away from the first side plate 120 is connected to the first side of the second side plate 140, and one side of the first side plate 120 away from the bottom plate 110 is connected to the second side of the second side plate 140. The bottom plate 110, the first side plate 120, and the second side plate 140 enclose to form a first annular structure. The opposite sides of the first annular structure in the third direction respectively have first openings. The third direction is specifically a horizontal direction perpendicular to the first direction. The inner cavity 101 is located in the inner hole of the first annular structure. In this embodiment, the housing further includes a first front side plate and a first rear side plate, and the first front side plate and the first rear side plate respectively cover the first openings on the opposite sides of the first annular structure in the third direction. The bottom plate 110, the first side plate 120, and the second side plate 140 enclose to form the inner cavity 101.

[0047] In other embodiments, as Figure 1 or Figure 2 shown, the second side plate 140 and the bottom plate 110 are spaced apart in the second direction, and the second direction is perpendicular to the first direction. In the drawings of the embodiments of the present application, the first direction is shown by the arrow A-A, the second direction is shown by the arrow B-B, and the third direction is shown by the arrow C-C. The housing further includes an extension plate 150 and a first connecting plate 160. The extension plate 150 is arranged parallel to the bottom plate 110 and is connected to the side of the second side plate 140 away from the first side plate 120 in the first direction. The extension plate 150 and the bottom plate 110 are connected by the first connecting plate 160. The extension plate 150, the first connecting plate 160, and the bottom plate 110 enclose to form an extension cavity, and the extension cavity communicates with the inner cavity 101. In the first direction, the image display 600 is located on the side of the light outlet 102 away from the concave mirror 300, and the extension cavity is used to accommodate at least part of the structure of the image display 600. In the embodiments of the present application, the second direction is specifically a direction perpendicular to the bottom plate 110. When the bottom plate 110 is horizontally arranged, the second direction is specifically a vertical direction. In this setting method, the extension plate 150 is located on the side of the second side plate 140 away from the first side plate 120. It can be seen that the extension cavity formed by the extension plate 150, the first connecting plate 160, and the bottom plate 110 is located on the side of the inner cavity 101 away from the first side plate 120. In this way, it is convenient to install the image display 600 on the side of the light outlet 102 away from the first side plate 120 in the first direction, so that the light emitting surface 610 can project light onto the quasi-total reflection concave surface 310.

[0048] In the above embodiment, the first side of the second side plate 140 is indirectly connected through the extension plate 150 and the first connecting plate 160 in sequence. Optionally, the second side of the second side plate 140 and the first side plate 120 can be directly connected. Or, as Figure 1 orFigure 2 As shown, the housing further includes a second connecting plate 130. The second side of the second side plate 140 is indirectly connected to the first side plate 120 through the second connecting plate 130. The bottom plate 110, the first side plate 120, the second connecting plate 130, the second side plate 140, the extension plate 150, and the first connecting plate 160 are sequentially connected end to end and enclose a second annular structure. The two opposite sides of the second annular structure in the third direction respectively have second openings. In this embodiment, the housing includes a second front side plate and a second rear side plate (not shown in the figure). The second front side plate and the second rear side plate respectively cover the second openings on the two opposite sides of the second annular structure in the third direction. The bottom plate 110, the first side plate 120, the second connecting plate 130, the second side plate 140, the extension plate 150, the first connecting plate 160, the second front side plate, and the second rear side plate enclose a mutually communicating inner cavity 101 and an extension cavity. The inner cavity 101 is located in the area sandwiched between the first side plate 120 and the second side plate 140, and the extension cavity is located between the extension plate 150 and the bottom plate 110.

[0049] Optionally, the concave mirror 300 can be directly connected to the side of the first side plate 120 facing the second side plate 140. Or, optionally, as Figure 1 or Figure 2 shown, an installation plate 170 is provided in the inner cavity 101. The installation plate 170 is located on the side of the first side plate 120 close to the second side plate 140, and the installation plate 170 is detachably connected to the bottom plate 110 and the second connecting plate 130 respectively. The concave mirror 300 is specifically installed on the installation plate 170. With such a setting, the aerial imaging device can include a plurality of installation plates 170, and different-sized concave mirrors 300 are installed on each installation plate 170. Thus, the installation plate 170 with a suitable-sized concave mirror 300 can be selected and installed in the inner cavity 101 according to actual needs, making the aerial imaging device more flexible. In a specific embodiment, an installation seat 112 is provided on the bottom plate 110, and a first installation groove 1121 extending in the third direction is formed on the installation seat 112. A second installation groove 131 extending in the third direction is formed on the side of the second connecting plate 130 facing the bottom plate 110. The two sides of the installation plate 170 spaced apart in the second direction are respectively inserted into the first installation groove 1121 and the second installation groove 131 in the third direction.

[0050] In a possible design, as Figure 1 or Figure 2 shown, the light-emitting surface 610 is disposed at a first included angle with the bottom plate 110, and the angle range of the first included angle is 25 degrees to 35 degrees. For example, the angle of the first included angle can be 25 degrees, 27 degrees, 30 degrees, 31 degrees, or 35 degrees, etc.

[0051] In a specific embodiment, a mounting platform 111 is protruded from the bottom plate 110, and the length of the mounting platform 111 in the first direction gradually increases along the second direction from the side close to the first side plate 120 to the side away from the first side plate 120, so that a slope is formed on the side of the mounting platform 111 away from the bottom plate 110, and the slope is set at a first angle with the bottom plate 110, and the image display 600 is installed on the slope.

[0052] In some embodiments, the principal axis of the quasi-total reflection concave surface 310 may be arranged at an acute angle to the first direction, or, as Figure 2 As shown, Figure 2 The dot-dash line in represents the main axis of the quasi-total reflection concave surface 310, and the main axis of the quasi-total reflection concave surface 310 can also be set parallel to the first direction. It is worth noting that the main axis of the quasi-total reflection concave surface 310 is specifically an axis that passes through the center point of the quasi-total reflection concave surface 310 and is perpendicular to the area where the center point of the quasi-total reflection concave surface 310 is located, and the focus of the quasi-total reflection concave surface 310 is located on the main axis of the quasi-total reflection concave surface 310.

[0053] Optionally, the focus of the quasi-total reflection concave surface 310 may be located on the side of the air imaging plate 200 away from the inner cavity 101, or on the side of the air imaging plate 200 facing the inner cavity 101, or on the air imaging plate 200, which is not limited here. In an optional embodiment, in the first direction, the maximum distance between the side of the light emitting surface 610 away from the concave mirror 300 and the quasi-total reflection concave surface 310 is less than 2 times the focal length of the concave mirror 300, and the maximum distance between the side of the light emitting surface 610 close to the concave mirror 300 and the quasi-total reflection concave surface 310 is greater than 1 times the focal length of the concave mirror 300. In other words, the distance between the side of the light emitting surface 610 away from the concave mirror 300 and the central area of the quasi-total reflection concave surface 310 is greater than 2 times the focal length of the concave mirror 300, and the distance between the side of the light emitting surface 610 close to the concave mirror 300 and the central area of the quasi-total reflection concave surface 310 is greater than 1 times the focal length of the concave mirror 300.

[0054] Since the image display 600 is located on the side of the concave mirror 300 close to the light outlet 102, and a quasi-total reflection concave surface 310 is formed on the side of the concave mirror 300 facing the light outlet 102. That is to say, both the light-emitting surface 610 of the image display 600 and the light outlet 102 are located on the side of the concave mirror 300 where the quasi-total reflection concave surface 310 is provided. By setting the main axis of the quasi-total reflection concave surface 310 parallel to the first direction, it is possible to maximize the situation that the quasi-total reflection concave surface 310 faces both the light-emitting surface 610 and the air imaging plate 200 at the light outlet 102, so that the light emitted from a larger area of the light-emitting surface 610 can all hit the provided quasi-total reflection concave surface 310, and the quasi-total reflection concave surface 310 can reflect the light from the light-emitting surface 610 to the air imaging plate 200, thereby being able to form a larger area of image information in the air on the premise that the area of the quasi-total reflection concave surface 310 is certain.

[0055] In a possible design, the cross-sectional shape of the quasi-total reflection concave surface 310 is one of an arc line, a parabola, and a free curve. It should be noted that the cross-sectional shape of the quasi-total reflection concave surface 310 specifically refers to that on any cross-section coinciding with the main axis of the quasi-total reflection concave surface 310, the cross-sectional shape of the quasi-total reflection can be one of an arc line, a parabola, and a free curve.

[0056] In some embodiments, the cross-sectional shape of the quasi-total reflection concave surface 310 is an arc line. Specifically, as Figure 1 or Figure 2 shown, the concave mirror 300 is a disc-shaped structure, the axis of the concave mirror 300 is parallel to the first direction, and a spherical crown-shaped quasi-total reflection concave surface 310 is formed on one side of the concave mirror 300 in its own axial direction. In this embodiment, the main axis of the quasi-total reflection concave surface 310 coincides with the axis of the concave mirror 300. In the embodiments of the present application, the size of the concave mirror 300 and the size of the quasi-total reflection concave surface 310 can be designed according to actual needs. In a specific embodiment, the outer diameter of the concave mirror 300 is 315 mm, the thickness of the concave mirror 300 in its own axial direction is 65 mm, the depth of the quasi-total reflection concave surface 310 is 53 mm, the radius of the quasi-total reflection concave surface 310 is 240 mm, and the width of the quasi-total reflection concave surface 310 in any direction perpendicular to the first direction is 300 mm.

[0057] In a possible design, on a projection plane perpendicular to the first direction, the projection of the quasi-total reflection concave surface 310 and the projection of the air imaging plate 200 at least partially overlap, so that the quasi-total reflection concave surface 310 can reflect the light from the light-emitting surface 610 to the air imaging plate 200 and pass through the air imaging plate 200 to form image information in the external air. In some alternative embodiments, the area of the air imaging plate 200 is larger than the area of the light-emitting surface 610, so that all the light emitted from the light-emitting surface 610 can pass through the air imaging plate 200 after being reflected by the quasi-total reflection concave surface 310, ensuring the integrity of the image information formed in the air.

[0058] In a possible design, as Figure 1 or Figure 2 shown, the side surface of the concave mirror 300 facing away from the light outlet 102 is a plane. Such a setting is for facilitating the installation of the concave mirror 300. For example, when the air imaging device further includes a mounting plate 170, the side of the concave mirror 300 facing away from the light outlet 102 is attached to the mounting plate 170, which can improve the fitting degree between the concave mirror 300 and the mounting plate 170, thereby enhancing the installation stability of the concave mirror 300.

[0059] Another embodiment of the present application further provides an interaction system, as Figure 1 shown, including a manipulation recognition device 400, a control device (not shown in the figure), and the air imaging device provided in any of the above embodiments. The manipulation recognition device 400 and the control device are both installed in the housing. The control device is respectively signal-connected to the image display 600 and the manipulation recognition device 400. The manipulation recognition device 400 forms an induction area in the air, and the induction area at least covers the area where the air imaging device forms image information in the external air. The image display 600 is used to feedback the image information to the control device. The manipulation recognition device 400 is used to obtain the position data of the operation object in the induction area and feedback it to the control device. The control device is used to perform analysis and calculation on the image information feedback by the image display 600 and the position data feedback by the manipulation recognition device 400 to obtain the control instruction of the operation object.

[0060] Optionally, the control device can be a microcomputer installed in the housing or other suitable controllers, which is not uniquely limited here. Optionally, the manipulation recognition device 400 can include a depth camera for hand recognition, such as a Leap Motion (a motion controller) or an Inter RealSense (Intel RealSense) camera, etc.

[0061] In the embodiments of the present application, the operation object may specifically be a paintbrush, the user's finger, or other operation objects that can be recognized by the manipulation recognition device 400 to obtain position data. It should be noted that in the embodiments of the present application, the signal connection may specifically be implemented through a wireless communication structure or through a data line signal connection, and this is not limited to a single method here.

[0062] It can be understood that the area where the aerial imaging device forms image information in the air is the virtual screen 500 of the aerial imaging device. Since the sensing area at least covers the area where the aerial imaging device forms image information in the external air, that is, the sensing area at least covers the entire virtual screen 500. In the embodiments of the present application, the control device is signal-connected to the image display 600. The control device is used to analyze and calculate the position information of the virtual screen 500 and the content displayed on the virtual screen 500 according to the image information fed back by the image display 600. When the user manipulates the virtual screen 500 through an operation object such as a finger or a paintbrush, the manipulation recognition device 400 can feed back the user's manipulation information to the control device. The control device can compare and analyze the position data fed back by the manipulation recognition device 400 with the position data of the virtual screen 500 to obtain the specific position where the user operates the virtual screen 500, and then analyze the user's control instruction. The control device is also used to execute corresponding functions according to the user's control instruction. For example, when the user's control instruction is to magnify the image information, the control device can control the image display 600 to magnify the image information. Another example is that when the image information includes a numeric keypad, the user can click on the numeric button pattern on the virtual screen 500, and the control device can store the number corresponding to the numeric button pattern clicked by the user. If the interaction system further includes an external terminal device, the control device can send the number corresponding to the numeric button image clicked by the user to the external terminal device.

[0063] Since the interaction system provided by the embodiments of the present application includes the aerial imaging device provided in any of the above embodiments, it at least has all the beneficial effects of the above aerial imaging device, which will not be elaborated here. In addition, the interaction system provided by the embodiments of the present application is provided with a manipulation recognition device 400 and a control device, so that the user can manipulate the image information formed by the aerial imaging device in the external air, improving the user's interaction experience. At the same time, since the user manipulates the image information in the air, it can effectively reduce the risk of the user contacting viruses or bacteria, and can also avoid the user leaving fingerprint and other information, with higher safety performance. When there are water droplets or dirt remaining on the user's finger, it can also prevent the phenomenon of electric shock or soiling the device caused by the user manipulating with a finger with water droplets or dirt remaining.

[0064] In some application scenarios, the interaction system provided by the embodiments of the present application can be used in scenarios such as drawing, signing, or entering passwords. In one example, the interaction system can be applied to a password input device required in banking business handling. Compared with the physical keyboard in the related art, by using the interaction system provided by the embodiments of the present application, the operation of entering a password can be performed on the virtual screen 500 formed in the air. In this way, the risk of users being infected with viruses or bacteria due to contacting the physical keyboard is effectively reduced. At the same time, the problem that users leave fingerprint information on the physical keyboard is avoided, and the security performance is higher. In another example, the interaction system can be applied to a signature device or a drawing device, enabling users to write their names or draw graphics (two-dimensional or three-dimensional graphics) on the virtual screen 500.

[0065] In a possible design, an extension cavity is formed in the housing of the air imaging device, and the control device is installed in the extension cavity. In this embodiment, the formation of the extension cavity in the housing of the air imaging device specifically means that when the housing of the air imaging device includes a bottom plate 110, an extension plate 150, and a first connecting plate 160, the extension cavity formed by enclosing the bottom plate 110, the extension plate 150, and the first connecting plate 160. Such a setting can prevent the control device from blocking the light emitted from the light-emitting surface 610 to the quasi-total reflection concave surface 310 or the light reflected from the quasi-total reflection concave surface 310 to the air imaging plate 200, and at the same time, it can also protect the control device. Optionally, when the housing of the air imaging device further includes an extension plate 150, the manipulation and recognition device 400 can be installed on the extension plate 150.

[0066] In some embodiments, the interaction system further includes an ultrasonic transmitter, which is used to emit ultrasonic waves to the sensing area to apply a certain pressure to the operation object in the sensing area, so that when the user manipulates the virtual screen 500 through the operation object, a certain pressure feedback can be obtained, improving the user's real feeling of manipulating the virtual screen 500.

[0067] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An aerial imaging device, characterized in that, Comprising: A housing having an inner cavity, and the housing is further formed with a light outlet communicating with the inner cavity; An air imaging plate covering the light outlet; A concave mirror installed in the inner cavity, and a quasi-total reflection concave surface is formed on one side of the concave mirror facing the light outlet; An image display installed in the inner cavity, the image display having a light-emitting surface, the image display being used for generating image information, the image display being located on a side of the concave mirror close to the light outlet, and the light-emitting surface being arranged facing the concave mirror; The light-emitting surface is used for emitting the light containing the image information to the quasi-total reflection concave surface, and the quasi-total reflection concave surface is used for reflecting the light from the light-emitting surface to the air imaging plate, so that the light is emitted to the outside through the air imaging plate and forms the image information in the outside air.

2. The aerial imaging device according to claim 1, wherein The housing includes a bottom plate, a first side plate and a second side plate surrounding the outer periphery of the inner cavity, the bottom plate is arranged parallel to a first direction, the first side plate and the second side plate are arranged on the same side of the bottom plate, the first side plate is arranged perpendicular to the first direction, and the second side plate is respectively arranged at an acute angle with the first side plate and the bottom plate; The concave mirror is installed on a side of the first side plate facing the second side plate, the light outlet penetrates through the second side plate, the image display is installed on the bottom plate, the light-emitting surface is inclined with respect to the bottom plate, and a side of the light-emitting surface close to the concave mirror is closer to the bottom plate than a side of the light-emitting surface far from the concave mirror.

3. The aerial imaging device according to claim 2, wherein, The second side plate and the bottom plate are spaced apart in a second direction, and the second direction is perpendicular to the first direction; the housing further includes an extension plate and a first connecting plate, the extension plate is arranged parallel to the bottom plate and is connected to a side of the second side plate far from the first side plate in the first direction, and the extension plate and the bottom plate are connected by the first connecting plate; an extension cavity is formed by enclosing the extension plate, the first connecting plate and the bottom plate, and the extension cavity communicates with the inner cavity; In the first direction, the image display is located on a side of the light outlet far from the concave mirror, and the extension cavity is used for accommodating at least part of the structure of the image display.

4. The aerial imaging device according to claim 2, wherein, The principal axis of the quasi-total reflection concave surface is parallel to the first direction.

5. The aerial imaging device according to claim 4, wherein, The light-emitting surface is arranged at a first included angle with the bottom plate, and the angle range of the first included angle is 25 degrees to 35 degrees.

6. The aerial imaging device according to claim 2, wherein On a projection plane perpendicular to the first direction, the projection of the quasi-total reflection concave surface and the projection of the air imaging plate at least partially overlap.

7. The aerial imaging device according to any one of claims 1 to 6, characterized in that The cross-sectional shape of the quasi-total reflection concave surface is one of an arc line, a parabola and a free curve.

8. The aerial imaging device according to any one of claims 1 to 6, characterized in that, A side surface of the concave mirror facing away from the light outlet is a plane.

9. An interaction system, characterized in that It includes a manipulation recognition device, a control device, and the aerial imaging device according to any one of claims 1 to 8. Both the manipulation recognition device and the control device are installed on the housing. The control device is respectively signal-connected to the image display and the manipulation recognition device. An induction area is formed in the air by the manipulation recognition device, and the induction area at least covers the area where the aerial imaging device forms the image information in the external air. The image display is used to feedback the image information to the control device. The manipulation recognition device is used to obtain the position data of the operation object in the induction area and feedback it to the control device. The control device is used to perform analysis and calculation on the image information feedback by the image display and the position data feedback by the manipulation recognition device to obtain the control instruction of the operation object.

10. The interactive system according to claim 9, wherein An extension cavity is formed in the housing of the aerial imaging device, and the control device is installed in the extension cavity.

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