阅读说明：本技术 医疗系统用空气成像机构及非接触式医疗服务装置 (Air imaging mechanism for medical system and non-contact medical service device ) 是由 许敏 李宗扬 张峰 彭显楚 于 2020-06-04 设计创作，主要内容包括：本发明公开了医疗系统用空气成像机构,安装于对应的医疗服务装置内,包括：用于产生显示画面的图像源；和将图像源产生的画面放大并在空气中成实像的成像放大镜。还公开了非接触式医疗服务装置,采用上述的医疗系统用空气成像装置,所述实像附近还设有手势识别装置。本发明的优点是：由于图像变的更大,显示相同内容的画面也更大,这样手势识别装置就能轻易的识别用户的手势具体是要触碰到哪个命令图案,而且用户在进行手势滑动的操作时,手势滑动距离也相应增大,大大降低了对手势识别装置的精度要求,从而使手势识别装置能更加准确的识别用户的操作,增强用户的体验感。(The invention discloses an air imaging mechanism for a medical system, which is arranged in a corresponding medical service device and comprises: an image source for generating a display picture; and the imaging magnifier magnifies the picture generated by the image source and realizes real image in the air. The non-contact medical service device is also disclosed, the air imaging device for the medical system is adopted, and a gesture recognition device is further arranged near the real image. The invention has the advantages that: the image is larger, and the picture displaying the same content is larger, so that the gesture recognition device can easily recognize which command pattern the gesture of the user is to touch, and when the user performs gesture sliding operation, the gesture sliding distance is correspondingly increased, so that the precision requirement on the gesture recognition device is greatly reduced, the gesture recognition device can more accurately recognize the operation of the user, and the experience of the user is enhanced.)

1. Medical system uses air imaging mechanism installs in corresponding medical service device, its characterized in that: the method comprises the following steps:

an image source for generating a display picture;

and the imaging magnifier magnifies the picture generated by the image source and realizes real image in the air.

2. The air imaging mechanism for a medical system of claim 1, wherein: the imaging magnifier is one of a Fresnel lens, a binary diffractive surface lens, a spherical mirror, an aspheric lens, a free-form surface lens or a flat micro lens.

3. The air imaging mechanism for a medical system of claim 1, wherein: the formation of image magnifying glass is fresnel lens group, including two piece at least parallel arrangement's fresnel lens, every fresnel lens all includes base plate and parallel arrangement at the straight-tooth on the base plate, and adjacent fresnel lens's straight-tooth is all not parallel.

4. The air imaging mechanism for a medical system of claim 3, wherein: the straight teeth of the adjacent Fresnel lenses are perpendicular to each other.

5. The air imaging mechanism for a medical system of claim 3, wherein: the top end of the straight tooth far away from the substrate is provided with a ridge line, and the ridge line is parallel to the straight line of the substrate.

6. The air imaging mechanism for a medical system of claim 5, wherein: the straight teeth are triangular prisms, and one side surface of each straight tooth is tightly attached to the substrate.

7. The air imaging mechanism for a medical system of claim 5, wherein: the cross section of straight tooth includes end to end's base and two hypotenuses in proper order, the base hugs closely on the base plate, one the hypotenuse is the pitch arc, another the hypotenuse is pitch arc or straight line.

8. The air imaging mechanism for a medical system of claim 3, wherein: two adjacent Fresnel lenses are arranged oppositely; or two adjacent Fresnel lenses are arranged in the same direction; or two adjacent Fresnel lenses are arranged in a back direction.

9. The air imaging mechanism for a medical system of claim 3, wherein: the two Fresnel lenses are tightly attached together; or a gap is reserved between the two Fresnel lenses.

10. The air imaging mechanism for a medical system of claim 1, wherein: the imaging magnifier is an array lens group, the array lens group comprises a plurality of lenses, and all the lenses are arranged in a matrix mode.

11. The air imaging mechanism for a medical system of claim 10, wherein: the lens is a micro lens or a Fresnel lens.

12. The air imaging mechanism for a medical system of claim 1, wherein: the imaging magnifier is one of a Fresnel reflector, a binary diffraction surface reflector, a spherical reflector, an aspheric reflector or a free-form surface reflector.

13. The air imaging mechanism for medical systems of any one of claims 1 to 12, wherein: a first reflector is further arranged on a light path between the image source and the imaging magnifier; and/or a second reflecting mirror is arranged on a light path between the imaging magnifier and the real image.

14. The air imaging mechanism for medical systems of any one of claims 1 to 12, wherein: the image source is one or more light emitting sources.

15. The air imaging mechanism for a medical system of claim 14, wherein: when the image source is a plurality of luminous sources, the luminous sources are arranged in a matrix form.

16. The air imaging mechanism for a medical system of claim 14, wherein: the light emitting source is one of an LCD, an LED, an OLED, an LCOS or a projector.

17. The air imaging mechanism for a medical system of claim 16, wherein: the projector is a DLP projector or a laser MEMS module, and a diffusion sheet is further arranged between the projector and the imaging magnifier.

18. The air imaging mechanism for a medical system of claim 17, wherein: the light transmittance of the diffusion sheet is 70% +/-10%.

19. The air imaging mechanism for medical systems of any one of claims 1 to 12, wherein: the size of the imaging magnifier is larger than that of the real image.

20. A non-contact medical service device, characterized by: the air imaging mechanism for the medical system according to any one of claims 1 to 19, wherein a gesture recognition device is further provided near the real image.

21. The contactless medical service device of claim 20, wherein: the non-contact medical service device comprises a voice recognition device which collects the voice of a user and combines the voice with the real image display content.

22. The contactless medical service device of claim 20, wherein: the image source and the imaging magnifier are installed in a shell of the medical service device, a transparent window for emitting light passing through the imaging magnifier is formed in the shell, and the gesture recognition device is arranged in the shell near the real image.

23. The contactless medical service device of claim 20, wherein: a plurality of air imaging mechanisms for medical systems are arranged in the medical service device.

24. The contactless medical service device of claim 20, wherein: an imaging position adjusting device is further arranged in the shell, and the air imaging mechanism for the medical system is installed on the imaging position adjusting device.

Technical Field

The invention relates to an air imaging mechanism for a medical system and a non-contact medical service device.

Background

The air imaging mechanism has wide application in many fields, for example, in a medical system, the air imaging mechanism is installed on a medical service device, real images are formed in the air, and then the air imaging mechanism is combined with a gesture recognition device, so that a patient or medical staff can operate under the condition of not contacting a service cabinet, the risk of cross infection is greatly reduced, and the safety of the medical staff and the patient can be effectively protected.

However, in the existing non-contact medical self-help system, the imaging element of the non-contact medical self-help system adopts a dihedral corner reflector or a strip-shaped reflector to form real images so as to achieve the purpose of human-computer interaction. But the dihedral corner reflector and the strip-shaped reflector both use the reflection principle of light rays, the real image formed by the dihedral corner reflector and the strip-shaped reflector is as large as the picture displayed by an image source, the image source is not very large from a cost point of view, which results in a smaller final imaging, the accuracy of the gesture recognition device is not high enough, so that a user often finds that the recognition is wrong or the gesture of the user cannot be recognized when the gesture recognition device is used, for example when a picture needing to be executed is clicked, because the picture is too small or the finger of the user is thick, the user can touch the adjacent picture at the same time, and the gesture recognition device can not judge which command the user clicks at all, for example, the user needs to turn the page to make a sliding gesture, because the picture is smaller, the sliding distance of the fingers of the user is smaller, and the gesture recognition device can possibly not recognize that the hands of the user slide, so that the experience of the user is greatly reduced.

Disclosure of Invention

The invention aims to provide an air imaging mechanism for a medical system and a non-contact medical service device, which can effectively solve the problem of low gesture recognition rate of the existing non-contact medical system.

In order to solve the technical problems, the invention is realized by the following technical scheme: the air imaging mechanism for the medical system is arranged in a corresponding medical service device and comprises:

an image source for generating a display picture;

and the imaging magnifier magnifies the picture generated by the image source and realizes real image in the air.

Preferably, the imaging magnifier is one of a fresnel lens, a binary diffractive surface lens, a spherical mirror, an aspheric lens, a free-form surface lens or a flat plate microlens. Can obtain a single-chip imaging magnifier with higher imaging quality.

Preferably, the imaging magnifier is a Fresnel lens group, and comprises at least two pieces of Fresnel lenses arranged in parallel, wherein each piece of Fresnel lens comprises a substrate and straight teeth arranged on the substrate in parallel, and the straight teeth of the adjacent Fresnel lenses are not parallel. The Fresnel lens group is adopted, the principle that a long-strip reflector or a dihedral corner reflector is adopted for imaging by reflection in the prior art is changed, and the real image amplified in the air by the refraction principle of the Fresnel lens group is utilized, so that the image which is much larger than an image source can be obtained under the condition that the image source is smaller, the weight of the whole device can be effectively reduced compared with the traditional air imaging system, and the production cost can be effectively reduced. For ordinary annular tooth and the fresnel lens that stacks in parallel only carry out the magnification, fresnel lens group in this system adopts the straight tooth structure to adjacent fresnel lens's straight tooth nonparallel, the light that passes first fresnel lens is revised through second fresnel lens, can effectively reduce the aberration, obtains clearer image, is favorable to correcting the distortion simultaneously, ensures that the image periphery also has higher definition.

Preferably, the straight teeth of adjacent fresnel lenses are perpendicular to each other, and the vertical state image is the best, so that the image tilt rotation can be avoided.

Preferably, the straight teeth are far away from the top end of the substrate and are provided with edge lines, the edge lines are parallel to the straight lines of the substrate, refraction and convergence of light rays are facilitated, a better image correction effect is achieved, and a clearer image is formed.

Preferably, the straight teeth are triangular prisms, one side face of each straight tooth is tightly attached to the substrate, the straight teeth of the triangular prisms are easy to manufacture, the good aberration eliminating effect is achieved, and meanwhile the yield is high.

Preferably, the cross section of straight-tooth includes end to end's base and two hypotenuses in proper order, the base is hugged closely on the base plate, one the hypotenuse is the pitch arc, and another the hypotenuse is pitch arc or straight line, and the pitch arc is better than straight line aberration elimination effect, and the best is that two hypotenuses all are the pitch arc.

Preferably, two adjacent fresnel lenses are arranged oppositely; or two adjacent Fresnel lenses are arranged in the same direction; or two adjacent Fresnel lenses are arranged in a back direction; the best optical performance can be obtained by the opposite arrangement, the opposite position between the two Fresnel lenses can be better fixed by the back arrangement, a better optical effect can be obtained by the same-direction arrangement, and the Fresnel lenses are arranged in the same direction to be beneficial to the superposition of the Fresnel lenses.

Preferably, the two Fresnel lenses are tightly attached together; or a gap is reserved between the two Fresnel lenses. The Fresnel lens group is tightly attached to the lens holder, so that the thickness of the Fresnel lens group can be reduced as much as possible, and the whole device is thinner.

Preferably, the imaging magnifier is an array lens assembly, the array lens assembly comprises a plurality of lenses, and all the lenses are arranged in a matrix manner. Compared with the single Fresnel lens adopted as an imaging unit, the array lens group is composed of a plurality of lenses arranged in a matrix mode, so that an imaged real image is finer and finer, aberration can be effectively reduced, and a clearer image can be obtained.

Preferably, the lens is a micro lens or a fresnel lens. The micro lens can enable the array lens group to have more lens units, so that the fineness of the picture is improved; fresnel lens, Fresnel lens low price easily makes to can be with the lighter and thinner that whole array lens group did.

Preferably, the imaging magnifier is one of a fresnel reflector, a binary diffractive surface reflector, a spherical reflector, an aspheric reflector or a free-form surface reflector. By utilizing the principle of reflection and amplification, the position between the image source and the imaging magnifier can be more flexibly arranged.

Preferably, a first reflector is further arranged on a light path between the image source and the imaging magnifier. The position relation between the image source and the imaging magnifier is changed, and the imaging magnifier can be arranged in a narrow space more easily.

Preferably, a second reflecting mirror is arranged on a light path between the imaging magnifier and the real image, so that the position between the real image and the imaging magnifier can be conveniently adjusted.

Preferably, the image source is one or more light-emitting sources, and the appropriate image source is selected according to the accuracy of the image to be displayed.

Preferably, when the image source is a plurality of light sources, the light sources are arranged in a matrix form, so that contents to be displayed by different light sources can be edited more easily.

Preferably, the image source is one of an LCD, an LED, an OLED, an LCOS or a projector, so that the cost and the threshold of the image source are reduced, and the adaptability is wider.

Preferably, the projector is a DLP projector or a laser MEMS module, a diffusion sheet is further arranged between the projector and the imaging magnifier, the diffusion sheet is added to improve the divergence angle of an image source, and the angle of observing a real image by human eyes is enlarged.

Preferably, the diffusion sheet has a light transmittance of 70% ± 10%, which is too high, so that an observer can see bright projected spots of the projector, and the light transmittance is too low, which may cause image blur and insufficient brightness.

Preferably, the size of the imaging magnifier is larger than that of the real image, so that a user can watch the complete image.

The non-contact medical service device adopts the air imaging mechanism for the medical system, and a gesture recognition device is arranged near the real image.

Preferably, the non-contact medical service device comprises a voice recognition device which collects the combination of the voice of the user and the real image display content, and the voice recognition device recognizes the combination of the voice command of the user and the real image content, so that the user experience is improved.

Preferably, the image source and the formation of image magnifying glass are installed in medical service device's casing, it has the transparent window that lets the light through the formation of image magnifying glass shoot out to open on the casing, gesture recognition device sets up in near the casing of real image, and such arrangement does benefit to the protection image source and does not receive accidental damage, can not shelter from the position of formation of image magnifying glass simultaneously, and gesture recognition device also can not receive the instruction of the discernment user that blocks, easily user operation.

Preferably, a plurality of air imaging mechanisms for the medical system are arranged in the medical service device, the advantage of small size of the air imaging mechanism for the medical system is fully utilized, a plurality of service pictures share one medical service device, and space is further saved.

Preferably, an imaging position adjusting device is further arranged in the air imaging mechanism for the medical system, the air imaging mechanism for the medical system is mounted on the imaging position adjusting device, and the position of the whole air imaging mechanism for the medical system is adjusted through the imaging position adjusting device, so that the requirements of users with different heights can be met.

Compared with the prior art, the invention has the advantages that: adopt the formation of image magnifying glass as the imaging element, make the image through the formation of image magnifying glass become the real image of enlargeing to realize that less image source presents great image, also can be under the prerequisite that does not change original air imaging mechanism volume, can obtain bigger image, like some portable medical system, usable space is little itself, can become great image, and the content of demonstration also can be abundanter. The larger image can make the user see more clearly, and can be identified more conveniently for some users with poor eyesight.

And the gesture recognition device is matched, because the image becomes larger, the picture displaying the same content is also larger, so that the gesture recognition device can easily recognize which command pattern the gesture of the user specifically touches, and when the user performs gesture sliding operation, the gesture sliding distance is correspondingly increased, so that the precision requirement on the gesture recognition device is greatly reduced, the gesture recognition device can more accurately recognize the operation of the user, and the experience of the user is enhanced. The device can be made into a portable non-contact medical service device, so that doctors can use the device conveniently in special occasions. Because the mode of imaging in the air and recognizing the gestures of the user is interacted with the system, no entity contact exists, the infection of germs is avoided, the safety of the user can be effectively protected when the user deals with contact type infectious diseases, and the virus propagation is blocked.

Drawings

FIG. 1 is a schematic structural diagram of an air imaging mechanism for a medical system according to a first embodiment of the present invention;

FIG. 2 is a schematic diagram of an air imaging mechanism for a medical system according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a second embodiment of an air imaging mechanism for a medical system according to the present invention;

FIG. 4 is a schematic view of an air imaging mechanism of a medical system according to a second embodiment of the present invention;

FIG. 5 is a first combination of adjacent Fresnel lenses according to an embodiment of the air imaging mechanism for a medical system of the present invention;

FIG. 6 is a second combination of adjacent Fresnel lenses in an embodiment of an air imaging mechanism for a medical system according to the present invention;

FIG. 7 is a third combination of adjacent Fresnel lenses according to an embodiment of the air imaging mechanism for a medical system of the present invention;

FIG. 8 is a first example of the straight teeth of the Fresnel lens in the first embodiment of the air imaging mechanism for medical systems according to the present invention;

FIG. 9 is a second form of the straight teeth of the Fresnel lens in the first embodiment of the air imaging mechanism for medical systems according to the present invention;

FIG. 10 is a third form of the straight teeth of the Fresnel lens in the first embodiment of the air imaging mechanism for medical systems according to the present invention;

FIG. 11 is a schematic structural diagram of a single Fresnel lens in an embodiment of the air imaging mechanism for a medical system according to the present invention;

FIG. 12 is a schematic view of an air imaging mechanism for a medical system according to a third embodiment of the present invention;

FIG. 13 is a schematic view of an array lens assembly formed by microlenses according to a third embodiment of the air imaging mechanism for a medical system of the present invention;

FIG. 14 is a schematic structural diagram of an array lens assembly formed by Fresnel lenses according to a third embodiment of the air imaging mechanism for a medical system of the present invention;

FIG. 15 is a schematic diagram of an air imaging mechanism for a medical system according to a fourth embodiment of the present invention using LCD, LED, OLED or LCOS imaging;

FIG. 16 is a schematic view of an air imaging mechanism for medical system according to a fourth embodiment of the present invention, in which a projector is used as a light source;

FIG. 17 is a schematic diagram of an air imaging mechanism for a medical system according to a fifth embodiment of the present invention using LCD, LED, OLED or LCOS imaging;

FIG. 18 is a schematic view of an air imaging mechanism for medical system according to a fifth embodiment of the present invention, in which a projector is used as a light source;

FIG. 19 is a schematic view of an air imaging mechanism of an embodiment of the medical system of the present invention;

FIG. 20 is an imaging schematic of the non-contact medical services device of the present invention;

FIG. 21 is an imaging schematic diagram of the non-contact medical services device of the present invention using a reflective imaging magnifier;

fig. 22 is a schematic structural diagram of the contactless medical service device of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The first embodiment is as follows:

referring to fig. 1 and 2, a first embodiment of the air imaging mechanism for a medical system according to the present invention is an air imaging mechanism for a medical system, which is installed in a medical service device, and includes: an image source 1 for generating a display picture; and an image magnifier 3 for magnifying the picture generated by the image source 1 and making the picture be real-imaged 5 in the air.

The medical service device adopted in the scheme comprises a medical service cabinet or a medical server, such as a self-service registration machine, a self-service image film taking machine or other portable medical equipment in an outpatient service hall, and can also be an existing medical instrument with keys, and an air imaging mechanism is adopted to replace all or part of the entity keys or replace the original touch screen. The imaging magnifier 3 is adopted as an imaging unit, so that the image passing through the imaging magnifier 3 is changed into an amplified real image 5, and a smaller image source 1 presents a larger image, namely the larger image can be obtained on the premise of not changing the volume of the original air imaging mechanism, the image as large as possible can be obtained in a limited space, thus a clearer picture can be provided, more contents can be displayed on the picture, and more services are provided. It is generally preferred that the size of the fresnel lens group be larger than the size of the real image 5 to allow the user to see the complete image.

Generally speaking, to form the enlarged real image 5, the distance from the image source 1 to the imaging magnifier 3 is between one time and two times of the focal length of the imaging magnifier 3, the imaging lens in this embodiment is a fresnel lens group, and includes at least two pieces of fresnel lenses arranged in parallel, each piece of fresnel lens includes a substrate 8 and straight teeth 9 arranged in parallel on the substrate 8, and the straight teeth 9 of adjacent fresnel lenses are not parallel. The two fresnel lenses arranged in parallel mean that the substrates 8 of the two fresnel lenses are parallel to each other, and the straight teeth 9 on each substrate 8 are also parallel to each other, that is, the length directions of the straight teeth 9 are all arranged in parallel, as shown in fig. 11; by straight teeth 9 is meant that the two end faces are identical in shape and that each ridge 93 is parallel to each other as shown in figures 8 to 10.

Light is emitted from an image source 1, an enlarged real image 5 is formed in the air after being refracted by the Fresnel lens group, the Fresnel lens group is adopted, the principle that a long-strip reflector or a dihedral angle reflector is adopted for imaging by reflection in the prior art is changed, the enlarged real image 5 is formed in the air by utilizing the refraction principle of the Fresnel lens group, and therefore an image which is much larger than the image source 1 can be obtained under the condition that the image source 1 is smaller, the weight of the whole device can be effectively reduced compared with a traditional air imaging system, and the production cost can be effectively reduced.

The Fresnel lens group in the system adopts the straight teeth 9, and the straight teeth 9 of the adjacent Fresnel lenses are not parallel, so that the aberration can be effectively reduced, a clearer image can be obtained, the distortion can be corrected, and the higher definition of the periphery of the image can be ensured compared with the Fresnel lenses which are stacked in parallel by common annular teeth.

The image source 1 of the above system is a light source 32 which can adopt one of LCD, LED, OLED or LCOS, the image source 1 has mature display technology, is easy to obtain, has easy to control cost, and is suitable for the condition that the image source 1 is not too large.

As shown in fig. 5, the fresnel lens group includes two fresnel lenses, and the two fresnel lenses are preferably arranged in opposite directions, that is, the straight teeth 9 of the two fresnel lenses are opposite to the straight teeth 9, and the two fresnel lenses are preferably adhered to each other, so as to reduce the thickness of the entire fresnel lens group, and obtain better optical performance, or certainly, a certain gap may be provided, and the gap is fixed by using glue with good light transmittance. Certainly, the fresnel lens group may also include more than two fresnel lenses, the number of the fresnel lenses used is determined according to the actual imaging requirement, and two adjacent fresnel lenses may also be arranged in an opposite and back combination manner.

The straight teeth 9 of the adjacent fresnel lenses are preferably perpendicular to each other, may be perpendicular to each other in contact, or may be perpendicular in space, that is, the projections on a plane parallel to the substrate 8 are perpendicular to each other, for example, all the straight teeth 9 on one fresnel lens are arranged in the transverse direction, and all the straight teeth 9 on the other adjacent fresnel lens are arranged in the longitudinal direction, so that the adjustment and control are easy, and the enlarged real image 5 is obtained and the image quality is good. Certainly, an acute angle can also be formed between the straight teeth 9 of the two fresnel lenses, and the acute angle is an included angle formed by the projections of the teeth on the two fresnel lenses on the surface parallel to the fresnel lenses, so that the obtained image can rotate obliquely, and some special scene requirements can be met.

As shown in fig. 11, the size and parameters of each fresnel lens are preferably the same, so that the relevant parameters can be easily adjusted and calculated, but fresnel lenses with different sizes and parameters can be selected to be combined according to actual needs, but the general structure of the fresnel lenses is the same, i.e. each fresnel lens comprises a base plate 8 and straight teeth 9 arranged on the base plate 8, the fresnel lens adopted by the present scheme is different from a common fresnel lens, the conventional fresnel lens is provided with a plurality of concentric circular teeth on the base plate 8, the present scheme adopts the straight teeth 9, and the straight teeth 9 are arranged in parallel, i.e. the teeth are not circular, but are elongated, the top end of the straight teeth 9 far from the base plate 8 is provided with a ridge line 93, and the ridge line 93 is parallel to the straight line of the base plate 8, as shown in fig. 8 to fig. 10, the cross-sectional shape of the straight teeth 9 is preferably triangular or similar triangular, the cross section is a triangle, namely a triangular prism, preferably the cross section is a right triangle, the similar triangle consists of a base 91 and two oblique sides 92 which are connected end to end, the base 91 is attached to or coincided with the substrate 8, the two oblique sides 92 can be both arc-shaped, one oblique side 92 can be arc-shaped, the other oblique side 92 can be a straight line, if the two oblique sides 92 are both arc-shaped, the intersection of the two oblique sides is not smooth transition, the intersection is kept to form a ridge line 93, and better optical performance can be obtained.

The height of the straight teeth 9 on the same substrate 8 follows the requirement of a Fresnel lens, the height gradually decreases from the center to two sides, namely the height of the straight tooth 9 in the middle is the highest, the height of the straight tooth 9 on two sides gradually decreases, the angle between the bevel edge 92 of the straight tooth 9 and the substrate 8 can also be different, and the parameters are correspondingly adjusted according to the actual imaging effect. The base plate 8 can be rectangular or circular, or can be in other shapes, and is determined according to actual layout and display requirements, edges of the straight teeth 9 can be parallel or not parallel to edges of the base plate 8, the base plate 8 and the straight teeth 9 are integrally manufactured, and the base plate 8 and the straight teeth 9 are manufactured by adopting materials such as glass or plastics.

For the whole optical system, in order to achieve reasonable layout and improve space utilization, a first reflecting mirror 2 may be added between the image source 1 and the fresnel lens, a second reflecting mirror 4 may also be added on the light path between the fresnel lens group and the real image 5, and the second reflecting mirror 4 may be a reflective lens.

As shown in fig. 2, the image source 1 is vertically arranged, the fresnel lens group is horizontally arranged, the first reflector 2 and the second reflector 4 are both at an angle of 45 degrees with the horizontal plane, light emitted from the image source 1 is reflected by the first reflector 2 to vertically enter the fresnel lens group, the light is refracted by the fresnel lens group and then irradiates the second reflector 4, the light is reflected by the second reflector 4 to form a real image 5 in the air, and the image suspended in the air is seen by a user, and the size of the real image 5 is larger than that of the image source 1, so that the real image 5 is obtained in an enlarged manner.

As shown in fig. 6 and 7, the two pieces of fresnel lenses may be arranged in the same direction or in a back direction, and the arrangement in the same direction is beneficial to the parallel arrangement of the multiple pieces of fresnel lenses, so that the fresnel lenses can be conveniently installed during manufacturing and arranged in the same direction; the Fresnel lens is arranged in a back mode, namely the base plate 8 and the base plate 8 of the two Fresnel lenses are close to each other, so that the two Fresnel lenses are positioned easily, and the assembly precision can be improved better.

Example two:

as shown in fig. 3 and 4, the difference from the first embodiment is that the image source 1 is changed into a projector 6, such as a DLP projector 6 or a laser MEMS module, because the light emitting characteristic of the image source 1 is changed, a diffusion sheet 7 is added between the projector 6 and a fresnel lens group, the diffusion angle of the image source 1 is increased, and the angle of the real image 5 observed by human eyes is enlarged, generally, the light transmittance of the diffusion sheet 7 is 70% ± 10%, the light transmittance is higher than 80%, an observer can see a bright projection point of the projector 6, and the light transmittance lower than 60% can cause image blurring and insufficient brightness, which affects the use of the user.

Example three:

as shown in fig. 12, 13 and 14, the difference from the first and second embodiments is that the magnifying lens 3 is an array lens assembly including a plurality of lenses 31, and all the lenses 31 are arranged in a matrix.

The array lens group is to be realized into an enlarged real image 5, the principle of a convex lens is generally adopted, the distance between an image source 1 and the array lens group is kept between one time and two times of focal length, a plurality of lenses can be understood as a plurality of independent lens combinations, and each lens can be made into a square shape for better imaging effect, so that seamless splicing between adjacent lenses can be realized. The array arrangement is basically a form in which rows and columns are distributed, and generally the number of rows is equal to or greater than two rows, and the number of columns is equal to or greater than two columns.

As shown in fig. 13 and 14, the lens may be a microlens or a fresnel lens, which is freely selected according to the design cost of the product, or may be a glass convex lens, each lens unit may be directly and integrally manufactured on one substrate 8 during processing, so as to reduce the influence of the gap between the lenses on the imaging quality, the parameters of each lens may be completely the same, and the parameters of the lenses at different positions may be correspondingly adjusted according to the characteristics of the real image.

Example four:

as shown in fig. 15 and 16, the difference from the first and second embodiments is that the imaging magnifier 3 is one of a fresnel lens, a binary diffractive surface lens, a spherical mirror, an aspherical lens, a free-form surface lens or a flat plate microlens. The imaging magnifier 3 may be the single lens or a lens group formed by overlapping the lenses. Compared with the imaging magnifier 3 adopted in the first embodiment and the third embodiment, the lens is simpler in structure, is suitable for occasions with imaging effect requirements which are not too high-grade, and is beneficial to reducing the production cost.

Example five:

as shown in fig. 17 and 18, the difference from the first and second embodiments is that the imaging magnifier 3 is one of a fresnel reflector, a binary diffractive surface reflector, a spherical reflector, an aspherical reflector, or a free-form surface reflector. Compared with the lenses in the first four embodiments, the reflector has the advantages that the image source 1 and the image can be positioned on the same side of the reflector, so that the position relations of various different forms are increased, and the selection is convenient according to different conditions.

Example six:

compared with the first five embodiments, the difference is that the image source 1 has more than one light source 32, and the plurality of light sources 32 are arranged in an array, so that the actual pictures of different light sources 32 can be adjusted according to the actual pictures in the using process, and a better display effect can be obtained. When the plurality of light sources 32 are combined with the arrayed lens assembly in the third embodiment, as shown in fig. 19, for example, in a display group consisting of a plurality of LCD displays, the plurality of light sources 32 may also be arranged in an array, and the number of the light sources 32 may be equal to or different from the number of the lenses.

Example seven:

as shown in fig. 20 to 22, the non-contact medical service device adopts the air imaging mechanism for medical systems according to any one of the first to sixth embodiments, the gesture recognition device 10 is disposed near the real image 5, and the gesture recognition device 10 determines which command operation in the current image the user specifically wants to execute, and as the image becomes larger, the position occupied by the displayed same content is also larger, so that the gesture recognition device 10 can easily recognize which command pattern the user's gesture specifically wants to touch, and when the user performs the gesture sliding operation, the gesture sliding distance is correspondingly increased, which greatly reduces the precision requirement on the gesture recognition device 10, thereby enabling the gesture recognition device 10 to recognize the user's operation more accurately, and enhancing the user's experience.

In addition, a voice recognition device can be added, and after a user sees the real image 5 formed by the air imaging mechanism for the medical system, the user expresses the operation command to be executed through voice, so that an additional command expression mode is added, and the experience of the user is enhanced.

Generally speaking, the image source 1 and the imaging magnifier 3 should be protected, and installed in the housing 11 of the medical service device, the front of the housing 11 may be opened, the opening is provided with transparent glass or other light-transmitting elements for blocking, so that the light passing through the imaging magnifier can be transmitted out of the housing 11 near the real image 5 to form a real image, and the gesture recognition device 10 is generally installed in the housing 11 near the real image 5 for recognizing the hand operation instruction of the user.

In order to adapt to users with different heights, an imaging position adjusting device can be arranged in the shell, the adjusting device can utilize some existing height adjusting mechanisms, for example, a sliding rod and a sliding block are adopted, the sliding block is driven by a stepping motor to move up and down along the sliding rod, the whole medical system is fixed on the sliding block by an air imaging mechanism, and of course, other adjusting devices capable of moving up and down can also be adopted.

Moreover, in order to further save space, the advantage of small volume of the air imaging mechanism for the medical system in the invention is fully utilized, a plurality of air imaging mechanism devices for the medical system facing different directions can be arranged in the shell of the same medical service device, so as to greatly save the space occupied by the medical service device, for example, the shell is arranged in a regular quadrangular mode, and a group of air imaging mechanisms for the medical system are respectively and correspondingly arranged on four different side surfaces, so that the air imaging mechanism for the medical system can provide service for four users at the same time.

The medical service device can be portable equipment or existing medical instruments except a common registering machine and an image film taking machine in an outpatient service hall, and an actual image formed by the air imaging mechanism for the medical system is combined with the gesture recognition device to replace an existing entity key or a touch screen, so that a user does not need to actually contact the medical service device and can interact with the medical service device, and the risk that the user infects germs by touching the medical service device in a high-risk place like a hospital is greatly reduced.

The first scheme of the gesture recognition device adopts an infrared camera, light emitted from an image source passes through an imaging magnifying lens and is refocused into a real image in the air, the sensing gesture range of the infrared camera is overlapped with the real image through debugging of distance and direction, then the gesture is recognized through the infrared camera, and then the image of the image source is controlled to perform corresponding actions through an MCU (microprogrammed control unit), such as amplification, reduction, left-right up-down rotation, selection, return and the like.

In the embodiment of the invention, the infrared camera can adopt a leaf motion gesture recognition camera in the prior art. Of course, the infrared camera can select any other type of gesture recognition camera, recognize the gesture of the operator, and send the type to the central processing unit.

The Leap Motion is a physical controller issued by Leap, 2013, 2 and 27 days by physical controller manufacturing company Leap facing PCs and macs, and the Leap Motion controller does not replace a keyboard, a mouse, a stylus pen or a touch pad, but instead works in cooperation with them. When the Leap Motion software is running, it is simply plugged into the Mac or PC, all that is ready. The operation can be completed by waving one finger without changing or editing the program.

The second scheme of the gesture recognition device adopts a 3D capacitive gesture recognition module, light emitted from an image source is refocused into a real image in the air after passing through an imaging magnifying lens, the sensing gesture range of the 3D capacitive gesture recognition module is overlapped with the real image after debugging of distance and direction, then the gesture is recognized through the 3D capacitive gesture recognition module, and then the image of the image source is controlled through an MCU to perform corresponding actions, such as amplification, reduction, left-right up-down rotation, selection, return and the like.

In the embodiment of the invention, the 3D capacitive gesture recognition module adopts a mcg3130 chip of microchip company. The MCU is a system controller, and can also be a computer with a high-definition video output interface and a usb port in the prior art.

The mcg3130 chip is a gesture recognition chip designed by microchip company specially for the industrial medical field. The detection distance is about 30cm, and the system requirements can be completely met under the appropriate design.

The third scheme of the gesture recognition device is that a millimeter wave radar gesture recognition module is adopted, light emitted from an image source is refocused into a real image in the air after passing through an imaging magnifying lens, the sensing gesture range and the real image of the millimeter wave radar gesture recognition module are overlapped through debugging of distance and direction, then the gesture is recognized through the millimeter wave radar gesture recognition module, and then the image of the image source is controlled through an MCU to perform corresponding actions, such as amplification, reduction, left-right up-down rotation, selection, return and the like.

In the embodiment of the invention, the millimeter wave radar gesture recognition module adopts awr1642 chips of TI company. The MCU is a system controller, and can also be a computer with a high-definition video output interface and a usb port in the prior art.

The awr1642 chip is a gesture recognition chip designed specifically for the industry by Ti corporation. The chip is not easily affected by ambient light, severe weather and the like, and can be used in all weather.

The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.