CN219041877U - Supervision device - Google Patents

Abstract

The utility model discloses a supervision device, which comprises: the shell is used for being embedded in the wall body, and a display window is arranged on the front side of the shell; the imaging module is used for horizontally arranging the display piece at the bottom of the accommodating space, the negative refractive index optical element is arranged above the display piece, the negative refractive index optical element is obliquely arranged upwards in the front-to-back direction, the light emitted by the display piece is suitable for forming a floating real image on one side, far away from the display piece, of the negative refractive index optical element, and the floating real image corresponds to the display window. The detection module is arranged on the front side of the display piece and is electrically connected with the display piece. From this, inlay the casing through with supervision device and locate the wall body to set up imaging module in the accommodation space of casing, thereby can make supervision device realize aerial formation of image and aerial interaction, can practice thrift supervision device's space, can make supervision device more pleasing to the eye, can promote supervision device's operation security.

Description

Supervision device

Technical Field

The utility model relates to the technical field of safety management, in particular to a supervision device.

Background

With the rapid development of national economy, the improvement of various aspects of people's production and life, the upgrade of the safety management of a core warehouse or a confidential warehouse, and the appearance of novel bacteria and viruses, bring great pressure and disasters to people. For these reasons, contactless development and upgrade of regulatory devices is particularly important.

In the prior art, when the traditional supervision system device inquires supervision parameters, the corresponding button of the entity screen is required to be clicked, the human body and the supervision system are contacted, the risk of virus and bacterial infection is increased for people in an intangible way, and in addition, the traditional supervision system device is non-embedded, occupies a large space and is not attractive.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to propose a supervision device which can promote the safety of the operation.

According to an embodiment of the present utility model, a supervision apparatus includes: the shell is used for being embedded in the wall body, a display window is arranged on the front side of the shell, and an accommodating space is formed in the shell; the imaging module is arranged in the accommodating space, the imaging module comprises a display piece and a negative refractive index optical element, the display piece is horizontally arranged at the bottom of the accommodating space, the negative refractive index optical element is arranged above the display piece, the negative refractive index optical element is obliquely and upwards arranged in the front-to-back direction, light rays emitted by the display piece are suitable for forming a floating real image through the negative refractive index optical element and at one side, away from the display piece, of the negative refractive index optical element, and the floating real image corresponds to the display window. The detection module is arranged on the front side of the display piece and is electrically connected with the display piece.

Therefore, the shell of the supervision device is embedded in the wall body, and the imaging module is arranged in the accommodating space of the shell, so that the supervision device can realize aerial imaging and aerial interaction, the space of the supervision device can be saved, the supervision device is more attractive, and the operation safety of the supervision device can be improved.

According to some embodiments of the utility model, the angle between the negative refractive index optical element and the display element is α, which satisfies the relation: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees.

According to some embodiments of the utility model, the detection module is located at the front side of the negative refractive index optical element, and the light ray emitted by the detection module is located at the front side of the floating real image and is parallel to the plane of the floating real image; or the light rays emitted by the detection module and the plane where the floating real image is located are in the same plane.

According to some embodiments of the utility model, the housing is provided with a control panel at a position corresponding to the top of the display window.

According to some embodiments of the utility model, the control panel is provided with an intercom button, a power button and a fingerprint button, and the intercom button, the power button and the fingerprint button are arranged on the control panel at intervals.

According to some embodiments of the utility model, the control panel is further provided with a camera, which is a binocular camera.

According to some embodiments of the utility model, the monitoring device further comprises a control module electrically connected to the display and the detection module, the control module being electrically connected to the control panel.

According to some embodiments of the utility model, the monitoring device further comprises a monitoring module, the control module is electrically connected with the monitoring module, and the monitoring module monitors at least one of temperature and humidity, vibration, infrared, door magnetism, personnel entering and exiting conditions and alarm information.

According to some embodiments of the utility model, the negative refractive index optical element comprises: the optical waveguide array comprises a plurality of optical waveguides, the optical waveguides are arranged in an array mode, and the optical waveguide array is arranged between the two transparent substrates.

According to some embodiments of the present utility model, the optical waveguide arrays are two groups, each of which is composed of optical waveguides with a rectangular cross section and a single row and multiple rows, wherein the optical waveguides are arranged at an angle of 45 degrees, and the waveguide directions of the mutually corresponding parts of the two groups of optical waveguide arrays are mutually perpendicular; or the optical waveguide array is a group and comprises a plurality of rows and columns of rectangular optical waveguides which are obliquely arranged at 45 degrees.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded schematic view of a supervision device according to an embodiment of the present utility model;

FIG. 2 is a partial schematic view of a supervision apparatus according to an embodiment of the utility model;

FIG. 3 is a schematic view of a portion of a wall and a monitoring device according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a negative refractive index optical element according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective split view of a negative refractive index optical element according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a first optical waveguide array and a second optical waveguide array according to an embodiment of the present utility model;

fig. 7 is a partial schematic view of a reflection unit and a reflection film according to an embodiment of the present utility model;

FIG. 8 is an imaging schematic of a negative refractive index optical element according to an embodiment of the utility model;

FIG. 9 is a schematic diagram of the optical path of light at a negative refractive index optical element according to an embodiment of the present utility model;

fig. 10 is a schematic view of an optical path for imaging a display according to an embodiment of the present utility model.

Reference numerals:

100. a supervision device; 200. a wall body;

10. a housing; 11. displaying a window; 12. an accommodation space; 13. a control panel; 131. a talk-back button; 132. a power button; 133. a fingerprint button; 134. a camera;

20. floating the real image;

30. an imaging module; 31. a display member; 32. a negative refractive index optical element; 321. a first optical waveguide array; 322. a second optical waveguide array; 323. a first transparent substrate; 324. a reflection unit; 325. a reflective film; 326. an adhesive; 327. a second transparent substrate; 33. and a detection module.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

A supervision device 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 10.

As shown in connection with fig. 1 to 10, a supervision apparatus 100 according to an embodiment of the present utility model may mainly include: the device comprises a shell 10, an imaging module 30 and a detection module 33, wherein the shell 10 is used for being embedded in a wall 200. Specifically, the casing 10 of the supervision device 100 is embedded in the wall 200, so that on one hand, the structure of the supervision device 100 at the use position is stable and reliable, the installation strength of the supervision device 100 can be ensured, the installation steps of the supervision device 100 can be saved, and on the other hand, the supervision device 100 and the wall 200 can be integrally formed, the space of the supervision device 100 outside the wall 200 can be saved, the embedded space optimization of the supervision device 100 can be realized, and the structure of the supervision device 100 can be more attractive.

Further, a display window 11 is provided at a front side of the housing 10, an accommodating space 12 is formed inside the housing 10, and the imaging module 30 is provided in the accommodating space 12. Specifically, the display window 11 is disposed at the front side of the housing 10, so that a display position can be provided for display content of the supervision device 100, and a working area can be provided for aerial imaging and aerial interaction of the supervision device 100.

Further, the supervision device 100 comprises an imaging module 30, a detection module 33 and a control module. The imaging module 30 is configured to image and display the screen of the supervision device 100 in the air. The detection module 33 may detect an interactive operation of the user to generate interactive information and transfer the interactive information to the control module. The control module judges the specific operation content of the user according to the internal instruction set and the interaction information, generates a corresponding control signal, and sends the control signal to the main control system of the control module, and the main control system can control the supervision device 100 and the warehouse to complete various operations according to the control signal. Meanwhile, the control module transmits an operation interface or a control result corresponding to the control signal to the imaging module 30, and the imaging module 30 displays images in the air so as to facilitate the next operation or knowledge of the control result of the user.

The imaging module 30 includes an equivalent negative refractive index optical element 32 and a display element 31, in an embodiment, the equivalent negative refractive index optical element 32 may be a plate lens, the display element 31 is disposed on one side of the plate lens, and after the light emitted by the display element 31 passes through the plate lens, a floating real image 20 opposite to the display element 31 is formed on the other side of the plate lens. The detection module 33 is configured to detect an operation of the floating real image 20 by a user, and feed back the detected interaction signal to the control module. Specifically, the supervision apparatus 100 may present information such as status information of the warehouse and operation buttons displayed on the display 31 on the floating real image 20, and the user may know the current status of the warehouse and the supervision apparatus 100 through the floating real image 20 and control the warehouse and the supervision apparatus 100 by clicking virtual buttons of the floating real image 20.

The structure and imaging principle of the negative refractive index optical element 32 of the present utility model will be described below with reference to fig. 4 to 10, which are described in detail below.

As shown in fig. 4-5, the equivalent negative refractive index optical element 32 may employ a plate lens including two transparent substrates, and a first optical waveguide array 321 and a second optical waveguide array 322 interposed between the two transparent substrates. Wherein, the first optical waveguide array 321 and the second optical waveguide array 322 are closely attached on the same plane and are orthogonally arranged. Preferably, first optical waveguide array 321 and second optical waveguide array 322 have the same thickness, facilitating design and production. Specifically, as shown in the drawing, the plate lens includes a first transparent substrate 323, a first optical waveguide array 321, a second optical waveguide array 322, and a second transparent substrate 327 in this order from the display 31 side to the floating real image 20 side.

Wherein the first transparent substrate 323 and the second transparent substrate 327 each have two optical surfaces, and the first transparent substrate 323 and the second transparent substrate 327 have a transmittance of 90% -100% for light having a wavelength between 390nm and 760 nm. The material of the first transparent substrate 323 and the second transparent substrate 327 may be at least one of glass, plastic, polymer, and acrylic for protecting the optical waveguide array and filtering out excessive light. If the strength of the first optical waveguide array 321 and the second optical waveguide array 322 after being closely and orthogonally bonded is sufficient, or if the mounting environment has a thickness limitation, only one transparent substrate may be disposed or no transparent substrate may be disposed at all.

As shown in fig. 5, the first optical waveguide array 321 and the second optical waveguide array 322 are composed of a plurality of reflection units 324 having rectangular cross sections, and the length of each reflection unit 324 is limited by the outer peripheral dimension of the optical waveguide array so as to be different in length. The extending direction of the reflection unit 324 in the first optical waveguide array 321 is X, the extending direction of the reflection unit 324 in the second optical waveguide array 322 is Y, and the Z direction is the thickness direction of the optical waveguide array. The extending directions (optical waveguide array directions) of the reflecting units 324 in the first optical waveguide array 321 and the second optical waveguide array 322 are mutually perpendicular, that is, the first optical waveguide array 321 and the second optical waveguide array 322 are orthogonally arranged when seen from the Z direction (thickness direction), so that two light beams in the orthogonal directions are converged at one point, the object image plane (light source side and imaging side) is ensured to be symmetrical relative to the plate lens, an equivalent negative refraction phenomenon is generated, and aerial imaging is realized.

As shown in fig. 6, the first optical waveguide array 321 or the second optical waveguide array 322 is composed of a plurality of parallel arranged reflection units 324 arranged obliquely with a user's viewing angle being deflected by 45 °. Specifically, the first optical waveguide array 321 may be composed of the reflecting units 324 that are 45 ° side by side and have rectangular cross sections in the lower left direction, the second optical waveguide array 322 may be composed of the reflecting units 324 that are 45 ° side by side and have rectangular cross sections in the lower right direction, and the arrangement directions of the reflecting units 324 in the two sets of optical waveguide arrays may be interchanged. For example, the extending direction of the reflecting unit 324 in the first optical waveguide array 321 is Y, the extending direction of the reflecting unit 324 in the second optical waveguide array 322 is X, the Z direction is the thickness direction of the optical waveguide array, and the first optical waveguide array 321 and the second optical waveguide array 322 are orthogonally arranged, when viewed from the Z direction (thickness direction), so that two light beams in orthogonal directions are converged at one point, and the object image plane (light source side and imaging side) is ensured to be symmetrical relative to the plate lens, and an equivalent negative refraction phenomenon is generated, thereby realizing aerial imaging. Wherein the optical waveguide material has an optical refractive index n1, in some embodiments n1>1.4, e.g., n1 has a value of 1.5, 1.8, 2.0, etc.

As shown in fig. 7, in the first optical waveguide array 321 and the second optical waveguide array 322, two interfaces exist between each reflection unit 324 and its adjacent reflection unit 324, and the interfaces are bonded by an adhesive 326 having good light transmittance. Preferably, adhesive 326 may be a photosensitive adhesive or a thermosetting adhesive, and adhesive 326 has a thickness T1 and satisfies T1>0.001mm, for example, t1=0.002 mm or t1=0.003 mm or t1=0.0015 mm, and the specific thickness may be set according to specific needs. And an adhesive 326 is arranged between the adjacent optical waveguide arrays in the plate lens and between the optical waveguide arrays and the transparent substrate, so that firmness is improved.

In some embodiments, the cross section of the reflection unit 324 may be rectangular, and one or both sides along the arrangement direction of the reflection unit 324 are provided with the reflection film 325. Specifically, in the direction of the array arrangement of the optical waveguides, both sides of each reflection unit 324 are plated with a reflection film 325, and the material of the reflection film 325 may be a metal material such as aluminum or silver or other nonmetallic compound materials for realizing total reflection. The reflective film 325 functions to prevent stray light from entering the adjacent optical waveguide array due to the lack of total reflection from affecting imaging. Alternatively, each reflection unit 324 may be provided with a dielectric film on the reflection film 325, and the dielectric film may serve to increase the light reflectance.

The cross-sectional width a and the cross-sectional length b of the single reflection unit 324 satisfy 0.1mm < a < 5mm,0.1mm < b < 5mm, and further satisfy 0.1mm < a < 2mm,0.1mm < b < 2mm for better imaging effect. For example a=0.2 mm, b=0.2 mm; alternatively, a=0.5 mm and b=0.5 mm. The large-size requirement can be realized by splicing a plurality of optical waveguide arrays during large-screen display. The overall shape of the optical waveguide arrays is set according to the application scene requirement, in this embodiment, the two groups of optical waveguide arrays are in rectangular structures, the two opposite angles of the reflecting units 324 are triangular, and the middle reflecting unit 324 is in a trapezoid structure. The lengths of the individual reflection units 324 are unequal, the reflection units 324 located at the diagonal of the rectangle have the longest length, and the reflection units 324 at both ends have the shortest length. In addition, the plate lens may further include an anti-reflection part and a viewing angle control part, and the anti-reflection part may increase the overall transmittance of the plate lens and increase the sharpness and brightness of the floating real image 20. The viewing angle control means can be used to eliminate the afterimage of the floating real image 20, reduce the feeling of dizziness for the observer, and prevent the observer from peeping into the device from other angles at the same time, thereby improving the overall aesthetic appearance of the device. The anti-reflection component and the visual angle control component can be combined, or can be respectively and independently arranged between the transparent substrate and the waveguide array, between two layers of waveguide arrays or on the outer layer of the transparent substrate.

The principle of aerial imaging is explained below. On the micrometer scale, a mutually orthogonal double-layer waveguide array structure is used to perform orthogonal decomposition on any optical signal. The original signal is projected on the first optical waveguide array 321, a rectangular coordinate system is established for the X-axis by taking the projection point of the original signal as the origin and being perpendicular to the first optical waveguide array 321, and the original signal is decomposed into two paths of mutually orthogonal signals, namely a signal X positioned on the X-axis and a signal Y positioned on the Y-axis in the rectangular coordinate system. Wherein, signal X undergoes total reflection at the surface of reflective film 325 at the same reflection angle as the incident angle while passing through first optical waveguide array 321; at this time, the signal Y is kept parallel to the first optical waveguide array 321, and after passing through the first optical waveguide array 321, the signal Y is totally reflected on the surface of the reflective film 325 according to the same reflection angle as the incident angle on the surface of the second optical waveguide array 322, and the reflected optical signal formed by the reflected signal Y and the signal X is in mirror symmetry with the original optical signal. Therefore, the light rays in any direction can be mirror-symmetrical through the plate lens, the divergent light rays of any light source can be converged into the floating real image 20 again at the symmetrical position through the plate lens, the imaging distance of the floating real image 20 is equal to the distance from the plate lens to the image source, namely the display piece 31, the imaging is equidistant, the position of the floating real image 20 is in the air, a specific carrier is not needed, and the real image is directly presented in the air. Therefore, the image in the space seen by the user is the image emitted from the display member 31.

In the embodiment of the present utility model, the light emitted from the light source of the display element 31 passes through the plate lens, and the above-mentioned process occurs on the plate lens. Specifically, as shown in fig. 9, the incident angles of the light rays on the first optical waveguide array 321 are α1, α2, and α3, respectively, the reflection angles of the light rays on the first optical waveguide array 321 are β1, β2, and β3, wherein α1=β1, α2=β2, and α3=β3, respectively, after being reflected by the first optical waveguide array 321, the incident angles on the second optical waveguide array 322 are γ1, γ2, and γ3, respectively, and the reflection angles on the second optical waveguide array 322 are δ1, δ2, and δ3, respectively, wherein γ1=δ1, γ2=δ2, and γ3=δ3.

Further, the incident angles after the convergence imaging are α1, α2, α3 … … αn, and the distance between the light source of the display element 31 and the plate lens is L, so that the imaging position of the floating real image 20 and the distance between the plate lens are L, and the viewing angle epsilon of the floating real image 20 is 2 times max (α).

It will be appreciated that if the size of the optical waveguide array is small, the image will only be visible at a distance from the imaging side of the optical waveguide array; and if the size of the optical waveguide array becomes larger, a larger imaging distance can be realized, so that the field of view is increased.

Preferably, the angle between the plate lens and the display 31 is set in the range of 45 ° ± 5 °, so that the size of the plate lens can be effectively utilized, the imaging quality can be improved, and the afterimage effect can be reduced. In addition, if there is another need for imaging location, other angles may be selected at the expense of partial imaging quality, preferably the flat lens is sized to display the image of the floating real image 20 presented by the entire display 31. However, if only a part of the screen of the display 31 is required to be seen in actual use, the size and position of the plate lens may be freely adjusted according to the actual display screen, which is not limited.

In addition, the imaging principle of the slab lens adopting the double-layer optical waveguide array structure is mainly described above, in other embodiments, if the four peripheral surfaces are all provided with a plurality of cubic columnar reflection units 324 with reflection films 325, and the plurality of cubic columnar reflection units 324 are all arranged in an array along the X and Y directions in a single-layer optical waveguide array structure, that is, the two layers of optical waveguide arrays are combined into one layer, the imaging principle is the same as that of the double-layer optical waveguide array structure, and the slab lens can also be used as the structure of the slab lens.

In the embodiment, the thicknesses of the first optical waveguide array 321 and the second optical waveguide array 322 are the same, so that the complexity of the structures of the first optical waveguide array 321 and the second optical waveguide array 322 can be simplified, the manufacturing difficulty of the first optical waveguide array 321 and the second optical waveguide array 322 can be reduced, the production efficiency of the first optical waveguide array 321 and the second optical waveguide array 322 can be improved, and the production cost of the first optical waveguide array 321 and the second optical waveguide array 322 can be reduced. It should be noted that the thicknesses are the same in a relative range, and not the same in absolute terms, i.e., for the purpose of improving the production efficiency, a certain thickness difference may exist between the optical waveguide arrays without affecting the aerial imaging quality.

According to some embodiments of the present utility model, the imaging mode of the display 31 may include, without limitation, RGB (red, green, blue) Light Emitting diodes (Light Emitting Diode, LEDs), LCDs (Liquid Crystal Display, liquid crystal displays), LCOS (Liquid Crystal on Silicon ) devices, organic Light-Emitting Diode (OLED) arrays, projections, lasers, laser diodes, or any other suitable display 31 or stereoscopic display.

In the embodiment, the luminance of the display 31 may be set not lower than 500cd/m2, so that the influence caused by the luminance loss in the optical path propagation can be reduced. Of course, in practical application, the display brightness of the display 31 may be adjusted according to the brightness of the ambient light.

In addition, according to some embodiments of the present utility model, the visual angle control process is performed on the surface of the display image of the display element 31, so that the ghost image of the floating real image 20 can be reduced, the picture quality can be improved, and the peeping of other people can be prevented, so that the present utility model is widely applied to other input devices requiring privacy information protection.

According to some embodiments of the present utility model, the detection module 33 may be a far and near infrared sensor, an ultrasonic sensor, a laser interference sensor, a grating sensor, an encoder, a fiber optic sensor, or a CCD sensor. That is, the sensing form of the detection module 33 includes, but is not limited to, far-near infrared, ultrasonic, laser interference, grating, encoder, fiber optic or CCD (charge coupled device), etc. The sensing area of the detection module 33 and the floating real image 20 are located on the same plane and comprise a three-dimensional space where the floating real image 20 is located, and an optimal sensing form can be selected according to the installation space, the viewing angle and the use environment, so that a user can conveniently operate the floating real image 20 in an optimal posture, and the sensitivity and convenience of user operation are improved.

According to some embodiments of the present utility model, the control module may be connected to the imaging module 30 and the detection module 33 in a wired or wireless manner, and transmit digital or analog signals, so that the volume of the supervision device 100 may be flexibly controlled, and the electrical stability of the supervision device 100 may be enhanced.

The second embodiment of the present utility model is described below. The rest of the configuration is the same as the first embodiment except for the difference in the structure of the supervision apparatus 100, and thus a repetitive description will be omitted with the same symbols added to the same configuration.

The structure of the supervision device 100 is characterized in that a total reflection mirror is added on the side of the display element 31 of the flat lens. The light emitted from the display 31 is reflected by the total reflection mirror and then enters the plate lens, and finally is converged on the other side of the plate lens, thereby forming the floating image 20. The functions and structures of the detection module 33 and the control module are the same as those of the first embodiment.

It can be seen that, in this embodiment, after the light of the display element 31 is reflected by the total reflection mirror, a virtual image which is equal in size to the display element 31 and is planar and symmetrical with respect to the total reflection mirror is equivalently formed on the other side of the total reflection mirror, and the floating real image 20 is actually mirror symmetrical with the virtual image with respect to the plate lens. Preferably, the included angle between the flat lens and the virtual image is set to be in the range of 45 degrees plus or minus 5 degrees, so that the size of the flat lens can be more fully utilized, and better imaging quality and smaller afterimage influence can be obtained. But other angles may be selected at the expense of partial imaging quality if there are other requirements for the imaging location. It is also preferable that the size of the plate lens and the total reflection mirror are set so that the user can see the whole picture presented by the display 31 at a glance, but if only a part of the content of the display 31 needs to be seen in actual use, the size of the plate lens can be freely adjusted in size and position according to the actual display picture.

The effect of this embodiment is that the orientation of the display screen in the display 31 can be changed, and the display 31 can be arranged closer to the panel lens, so that the overall thickness of the monitoring device 100 is significantly reduced without changing the distance between the floating real image 20 and the panel lens, and thus the monitoring device 100 can be integrated better.

It will be appreciated that a plurality of total reflection mirrors (not shown) may be provided in the monitor device 100, in which the light of the display 31 is reflected a plurality of times, forming a virtual image farther from the flat lens, so that the thickness of the monitor device 100 may be further reduced.

A third embodiment of the present utility model is described below. The rest of the configuration is the same as the first embodiment except for the difference in the structure of the supervision apparatus 100, and thus a repetitive description will be omitted with the same symbols added to the same configuration.

The structure of the supervision device 100 is characterized in that a retro-reflector is used instead of a flat lens, and a beam splitter is added to cause light from the display 31 to be refocused in the air, so as to present the floating real image 20.

Specifically, the imaging principle of the present embodiment is as follows:

light emitted from the display 31 is first reflected to the surface of the retro-reflector by a beam splitter, which is a half-transmissive beam splitter for visible light, i.e. has characteristics of 50% transmittance and 50% reflectance for visible light. When this portion of the light is incident on the surface of the retro-reflector, it is reflected again by the microstructure within the retro-reflector and the reflected light returns from a direction that is nearly opposite to the incident light, at which point the reflected light is transmitted through the beam splitter, thereby forming a floating real image 20 in the air at a symmetrical position of the display 31 with respect to the beam splitter face.

The beam splitter is used for dividing one beam into two beams, one beam is transmitted and the other beam is reflected, and the beam is formed by a metal film or a dielectric film, wherein the ratio of reflection to transmission is about 1:1 in the embodiment, and the beam splitter can be divided into a polarized type and a non-polarized type according to the principle.

The surface of the retroreflector has an retroreflection effect, and can reflect incident light back from a direction close to the opposite incident direction, and the surface of the retroreflector is covered with micro glass beads or micro prism structures, so that the incident light can be refracted and reflected through the internal micro structure, and the light can be emitted along the opposite incident direction. Since the retro-reflector structure is a relatively conventional structure, it will not be described in any great detail herein.

Furthermore, according to some embodiments of the present utility model, if the light emitted from the display 31 is linearly polarized, reflected by the polarizing beam splitter, and then enters the retro-reflector through the 1/4 wave plate, and the reflected light returns from the direction opposite to the incident light and passes through the 1/4 wave plate again, the polarization plane of the linearly polarized light emitted from the display 31 is rotated by 90 °, so that the light can be emitted from the polarizing beam splitter and collected in the air into the floating real image 20. By this means, the energy utilization of the light of the display 31 can be greatly improved, and the light intensity loss can be reduced, thereby improving the brightness of the floating real image 20. It will be appreciated that if the brightness of display 31 is sufficient, or the light emitted by display 31 is not linearly polarized, a non-polarizing beam splitter may be used without the 1/4 wave plate.

Referring to fig. 1, the angle α between the negative refractive index optical element 32 and the display element 31 satisfies the relationship: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees. Specifically, in the embodiment of the present utility model, the display member 31 is horizontally disposed at the bottom of the housing 10, and the angle between the negative refractive index optical element 32 and the display member 31 is set between 40 ° and 50 °, so that the installation of the negative refractive index optical element 32 in the housing 10 can be facilitated, and the formation of the floating real image 20 can be facilitated for the user.

As shown in fig. 1 to 3, the housing 10 is provided with a control panel 13 at a position corresponding to the top of the display window 11. Specifically, in the embodiment of the present utility model, the supervision device 100 retains the related functions of the conventional device, and the control panel 13 may retain a part of the conventional functions for the supervision device 100, so as to ensure the working reliability of the supervision device 100, and improve the applicability of the supervision device 100. In addition, the control panel 13 is disposed at a position of the housing 10 corresponding to the top of the display window 11, so that not only the working area of the control panel 13 and the working area of the display window 11 are independent, but also the height of the control panel 13 is opposite to the face, and the supervision device 100 can collect face information conveniently.

As shown in fig. 1 to 3, the control panel 13 is provided with an intercom button 131, a power button 132 and a fingerprint button 133, and the intercom button 131, the power button 132 and the fingerprint button 133 are arranged on the control panel 13 at intervals. Specifically, the control panel 13 may provide stable installation positions for the intercom button 131, the power button 132 and the fingerprint button 133, and the installation settings of the intercom button 131, the power button 132 and the fingerprint button 133 may enable the supervision device 100 to have intercom, on-off and fingerprint input functions, so that normal use of intercom, on-off and fingerprint input functions of the supervision device 100 may be ensured, use experience of the supervision device 100 may be enriched, and safety of the supervision device 100 may be improved. In addition, the intercom button 131, the power button 132 and the fingerprint button 133 are arranged at intervals on the control panel 13, so that the working area of the control panel 13 can be orderly and orderly, and the supervision device 100 can be more attractive while retaining basic functions.

As shown in fig. 1-3, the control panel 13 is further provided with a camera 134, and the camera 134 is a binocular camera. Specifically, the control panel 13 may provide a stable installation position for the camera 134, and the installation setting of the camera 134 on the control panel 13 may enable the supervision device 100 to have a face recognition function, so that the face recognition function of the supervision device 100 may be ensured to be used normally. In addition, the camera 134 is a binocular camera, so that the monitoring device 100 can capture face information more accurately, the face recognition function of the monitoring device 100 can be more intelligent, the safety of the monitoring device 100 can be improved, the monitoring device 100 can play an effective monitoring effect on a warehouse, and the use experience of the monitoring device 100 can be enriched.

Further, the control module is electrically connected with the control panel 13, so that the control module can be connected with the intercom button 131, the power button 132, the fingerprint button 133 and the camera 134 on the control panel 13, the control module can control the functions of intercom, on-off, fingerprint input, face recognition and the like of the supervision device 100, automatic supervision of the supervision device 100 can be realized, the supervision device 100 can be more intelligent, further, the use experience of the supervision device 100 can be improved, and the realization of the aerial imaging and aerial interaction functions of the supervision device 100 can be ensured.

According to an embodiment of the present utility model, the supervision device 100 further comprises a supervision module, and the control module is electrically connected with the supervision module, and the supervision module supervises at least one of temperature and humidity, vibration, infrared, door magnetism, personnel access conditions and alarm information. Specifically, the supervision module may integrate functions of function setting, information capturing, information sending, information management and the like of the supervision device 100, and the control module is electrically connected with the supervision module, so that the supervision device 100 may perform supervision on at least one of temperature and humidity, vibration, infrared, door magnet, personnel access conditions and alarm information, and may implement contactless interactive supervision of the supervision device 100, so that use experience of the supervision device 100 may be improved, and security performance of the supervision device 100 may be improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A supervision apparatus, comprising:

the shell is used for being embedded in a wall body, a display window is arranged on the front side of the shell, an accommodating space is formed in the shell, a control panel is arranged at a position corresponding to the top of the display window, an intercom button, a power button and a fingerprint button are arranged on the control panel, and the intercom button, the power button and the fingerprint button are arranged on the control panel at intervals;

the imaging module is arranged in the accommodating space and comprises a display piece and a negative refractive index optical element, the display piece is horizontally arranged at the bottom of the accommodating space, the negative refractive index optical element is arranged above the display piece, the negative refractive index optical element is obliquely and upwards arranged in a extending mode in the front-to-back direction, light rays emitted by the display piece are suitable for forming a floating real image through the negative refractive index optical element and on one side, away from the display piece, of the negative refractive index optical element, and the floating real image corresponds to the display window;

the detection module is arranged on the front side of the display piece and is electrically connected with the display piece.

2. The supervision device according to claim 1, wherein an angle α between the negative refractive index optical element and the display piece satisfies the relation: alpha is more than or equal to 40 degrees and less than or equal to 50 degrees.

3. The surveillance device of claim 1, wherein the detection module is located on a front side of the negative refractive index optical element, and the light rays emitted by the detection module are located on a front side of the floating real image and are parallel to a plane in which the floating real image is located; or (b)

And the light rays emitted by the detection module and the plane where the floating real image is located are positioned on the same plane.

4. The supervision device according to claim 1, wherein the control panel is further provided with a camera, the camera being a binocular camera.

5. The supervision device according to claim 1, further comprising a control module electrically connected to the display and the detection module, the control module electrically connected to the control panel.

6. The device of claim 5, further comprising a supervision module, wherein the control module is electrically connected to the supervision module, wherein the supervision module supervises at least one of temperature and humidity, vibration, infrared, door magnetism, personnel access conditions, and alarm information.

7. The supervision device according to any one of claims 1 to 6, wherein the negative refractive index optical element comprises: the optical waveguide array comprises a plurality of optical waveguides, the optical waveguides are arranged in an array mode, and the optical waveguide array is arranged between the two transparent substrates.

8. The supervision device according to claim 7, wherein the optical waveguide arrays are two groups and each consist of optical waveguides which are arranged obliquely at 45 degrees in a single row and are arranged in multiple rows and have rectangular cross sections, and the waveguide directions of mutually corresponding parts of the two groups of optical waveguide arrays are mutually perpendicular; or (b)

The optical waveguide array is a group and comprises a plurality of rows and columns of rectangular optical waveguides which are obliquely arranged at 45 degrees.

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