CN214151368U - Lens, emission module and electronic device - Google Patents

Abstract

The application provides a lens, which comprises an incident surface, a reflecting surface and an annular emergent surface, wherein the incident surface is used for collimating incident laser and transmitting the laser in the lens along the axial direction; the reflecting surface is arranged opposite to the incident surface along the axial direction and is used for projecting the incident laser along the circumferential direction after being reflected; the annular emergent surface is arranged opposite to the reflecting surface along the circumferential direction and used for projecting the reflected laser along the annular emergent surface. And the collimated laser is reflected out along the circumferential direction of 360 degrees through the reflecting surface. The application simultaneously provides a transmission module and electron device.

Description

Lens, emission module and electronic device

Technical Field

The utility model relates to the field of optical technology, especially, relate to a lens, transmission module and electron device.

Background

Along with the progress of technique, the module of making a video recording is applied to in various electronic product, for example robot, intelligent detection terminal etc. of sweeping the floor, and electronic product acquires the environment image through the module of making a video recording.

However, in the process of implementing the present application, the applicant finds that at least the following problems exist in the prior art: the detection angle of the current module of making a video recording can't reach 360 degrees, can't make a video recording through a module of making a video recording and obtain electronic product's all ring edge border image, and to some detection class electronic product, 360 degrees range finding is necessary condition, especially the robot of sweeping the floor, 360 degrees scans or realizes 360 degrees scans through a plurality of module cooperations of making a video recording through self rotation realization mostly of traditional electronic product, scanning speed is slower, can't satisfy and acquire in real time, realize that the degree of difficulty is higher and the cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a lens, an emission module and an electronic device to solve the above problems.

Embodiments of the present application provide a lens, comprising:

the incident surface is used for collimating incident laser and transmitting the laser in the lens along the axial direction;

the reflecting surface is arranged opposite to the incident surface along the axial direction and is used for reflecting the incident laser and then projecting the reflected incident laser along the axial direction;

the annular emergent surface is opposite to the reflecting surface along the axial direction and is used for projecting the reflected laser along the annular emergent surface.

So, go out along 360 degrees circumference reflections through the laser after the plane of reflection will collimate to promote the detection angle who has the module of making a video recording of this lens.

In some embodiments, the incident surface has an annular convex portion for collimating the incident laser light; the light source is provided with an annular light emitting area, and the annular bulge part corresponds to the annular light emitting area of the light source.

In this way, the incident light is collimated by the incident surface having the annular convex portion.

In some embodiments, the reflecting surface has a triangular or trapezoidal cross section in the axial direction, and the reflecting surface has a circular cross section in the circumferential direction.

Therefore, the collimated light rays are reflected out along the circumferential direction through the conical reflecting surface.

In some embodiments, further comprising:

and a reflective film covering the reflective surface.

Thus, the emission capability of the annular emission surface is improved by the reflection film.

This application provides a transmission module simultaneously, include above-mentioned embodiment lens, the transmission module further includes:

further comprising:

and the annular diffraction optical element is sleeved on the emergent surface of the lens.

Therefore, the laser emitted by the lens is processed through diffraction of the diffraction optical element, and a plurality of linear laser spots are projected by the laser in the direction perpendicular to the axis of the lens, so that the attenuation of the laser energy along with the increase of the distance is reduced, and the depth measurement distance and the resolution of the camera module with the emitting module are increased.

In some embodiments, the following formula is satisfied:

10*P<L；

wherein L is the radial width of the annular convex part of the lens, the diffractive optical element is provided with an array of microstructures, and P is the maximum size of the microstructures.

Therefore, the uniformity of the light spots emitted by the emission module is improved.

Further, the transmitting module further comprises:

the lens comprises a shell, a light source and a lens, wherein the shell is provided with an accommodating cavity, the accommodating cavity is provided with an inlet and an outlet, the light source is positioned at the position of the accommodating cavity close to the inlet, and the lens is positioned at the position of the accommodating cavity close to the outlet and at least partially penetrates through the outlet.

In this manner, the light source and the lens are accommodated by the housing.

This application provides a transmission module simultaneously, include above-mentioned embodiment lens, the transmission module further includes:

and the diffraction microstructure is arranged on at least one of the reflecting surface and the annular emergent surface.

So, set up through diffraction micro-structure and plane of reflection or annular emergent surface integral type to throw out lens after the laser diffraction after will reflecting, throw out multichannel linear laser facula in the direction of perpendicular to lens axis with promoting the transmission module, in order to reduce the decay of laser energy along with the increase of distance.

This application provides an electron device simultaneously, includes:

the transmitting module according to the above embodiment.

Thus, the incident laser is projected along 360 degrees through the transmitting module of the electronic device, so that the detection angle of the electronic device with the transmitting module is 360 degrees.

Drawings

Fig. 1 is a schematic perspective view of a transmitting module according to a first embodiment of the present invention.

Fig. 2 is an exploded perspective view of the transmitter module shown in fig. 1.

Fig. 3 is a perspective view of the lens shown in fig. 1.

Fig. 4 is a schematic view of a ring-shaped distribution of light emitting points of the light source shown in fig. 1.

Fig. 5 is a schematic view of a light efficiency of a transmitting module according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of the lens shown in fig. 3.

Fig. 7 is a schematic optical path diagram of an embodiment of a transmitting module.

Fig. 8 is a schematic diagram of a transmitting module according to a second embodiment of the present invention.

Fig. 9 is a schematic view of an electronic device according to a third embodiment of the present invention.

Description of the main elements

Transmitting module 100

Light source 10

Lens 20

Cylindrical body 21

Incident surface 22

Convex portion 222

Reflecting surface 24

Concave part 242

An exit surface 26

Circuit board 30

Housing 40

Accommodating cavity 42

Inlet 422

Outlet 424

Diffractive optical element 50

Electronic device 200

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, an embodiment of the present disclosure provides a transmitting module 100 applied to various electronic devices, such as a vehicle-mounted device, a home device, and the like, where the transmitting module 100 is used for projecting a laser beam 360 degrees so that a detection angle of the electronic device having the transmitting module 100 is 360 degrees.

Referring to fig. 2, the emission module 100 includes a light source 10 and a lens 20, the light source 10 is located at one side of the lens 20, the light source 10 is used for emitting laser toward the lens 20, and the lens 20 is used for collimating the laser and reflecting the collimated laser, so that the laser is projected along 360 degrees.

Further, the emission module 100 further includes a circuit board 30, the light source 10 is disposed on one side of the circuit board 30 and electrically connected to the circuit board 30, the lens 20 is disposed on one side of the light source 10 away from the circuit board 30, and the circuit board 30 is used for providing current for the light source 10.

Further, the emission module 100 further includes a housing 40, the housing 40 has a receiving cavity 42, the receiving cavity 42 has an inlet 422 and an outlet 424, the housing 40 is disposed on one side of the circuit board 30, the light source 10 is disposed in the receiving cavity 42 and near the inlet 422, the lens 20 is disposed in the receiving cavity 42, and at least a portion of the lens 20 passes through the outlet 424 of the receiving cavity 42, so that the laser reflected by the lens 20 is projected.

Further, the housing 40 has a supporting portion 44, the supporting portion 44 is located in the accommodating cavity 42 and between the light source 10 and the lens 20, and the supporting portion 44 is used for supporting the lens 20 so that the lens 20 at least partially passes through the outlet 424 of the accommodating cavity 42.

Referring to fig. 2 and 3, the lens 20 includes an incident surface 22, a reflecting surface 24, and an exit surface 26, the incident surface 22 and the reflecting surface 24 are disposed opposite to each other along the axial direction, and the exit surface 26 is connected to the incident surface 22 and the reflecting surface 24 respectively and disposed opposite to the reflecting surface 24 along the axial direction. Laser emitted by the light source 10 enters the lens 20 through the incident surface 22, the incident surface 22 collimates the incident laser so that the laser is projected to the reflecting surface 24 along the axial direction, and the reflecting surface 24 reflects the collimated laser along the circumferential direction and projects the laser through the exit surface 26.

In this embodiment, the circumferential direction is perpendicular to the axial direction.

It is understood that the reflecting surface 24 can reflect the collimated laser light by the total reflection principle, the coating of a reflecting film or the emission cross section.

In this embodiment, the incident surface 22 has an annular protrusion 222, the light source 10 emits an annular laser beam corresponding to the protrusion 222 to enter the incident surface 22, and the annular protrusion 222 collimates the laser beam along the axial direction, and the annular protrusion 222 corresponds to the light emitting area of the light source 10.

It will be appreciated that in other embodiments, the incident surface 22 may be arranged in other configurations to achieve collimation of the incident laser light, such as a microstructure, a microlens, a collimating lens, a fresnel collimating structure, or other collimating structure arranged on the incident surface 22.

Referring to fig. 2 and 3 again, the lens 20 includes a cylindrical body 21, one side of the cylindrical body 21 along the axial direction is an incident surface 22, the other side has an inwardly recessed lower recess, an interface between the lower recess and the cylindrical body 20 forms a reflecting surface 24, and a peripheral wall surface of the cylindrical body 21 forms an annular exit surface 26.

Fig. 4 is a schematic view of a ring-shaped distribution of light emitting points of the light source 10 provided in the present application, in which the light source 10 is used for emitting ring-shaped laser light, and the ring-shaped distribution of the ring-shaped laser light corresponds to the ring-shaped protrusion 222.

Referring to fig. 5, which is a schematic view illustrating the light efficiency of the emission module 100 provided in the present application, the emission module 100 can project light along a circumferential direction 360.

It will be appreciated that in other implementations, the light source 10 may be an annular surface to emit an annular surface light source.

Referring to fig. 2 and 6, the reflection surface 24 is disposed opposite to the incident surface 22, the reflection surface 24 is conical, the reflection surface 24 forms a concave portion 242, a cross section of the concave portion 242 along the axial direction of the lens 20 is triangular, and a cross section of the concave portion 242 along the direction perpendicular to the axial direction of the lens 20 is circular. In this manner, the collimated laser light is reflected by the conical recess 242 to be reflected out along 360 degrees.

It is understood that in other embodiments, the reflective surface 24 has a truncated cone shape, that is, the reflective surface 24 forms a concave portion 242, the cross section of the concave portion 242 along the axial direction of the lens 20 is trapezoidal, the cross section of the concave portion 242 along the direction perpendicular to the axial direction of the lens 20 is circular, and the cross section of the concave portion 242 along the axial direction of the lens 20 is isosceles trapezoid.

Referring to fig. 7, which is a schematic optical path diagram of the emission module 100 provided by the present application, the light source 10 emits ring-shaped laser toward the incident surface 22 of the lens 20, the incident surface 22 collimates the laser through the annular protrusion 222 and emits the collimated laser to the reflection surface 24, and the reflection surface 24 reflects the collimated laser through the conical depression 242 so as to reflect the laser along 360 degrees, so as to obtain the schematic optical path diagram shown in fig. 7. It will be appreciated that due to the reflective capability of the reflective surface 24 and the taper angle of the conical depression 242, a laser beam that is not in the horizontal direction as shown in fig. 7 may be obtained in practical applications.

Further, when the triangular shape of the cross section of the concave portion 242 along the axial direction of the lens 20 is an isosceles right triangle, the angle of the collimated laser beam is changed by 90 degrees by the reflecting surface 24 via the conical concave portion 242, and the laser beam emitted through the emitting surface 26 is perpendicular to the axial line of the lens 20.

Further, the lens 20 further includes a reflective film (not shown) covering the recess 242 of the reflective surface 24, so that the collimated laser can be reflected by the reflective film, thereby improving the ability of the reflective surface 24 to reflect the laser.

Referring to fig. 8, a schematic diagram of a transmitting module 100 according to a second embodiment is provided, which is similar to the first embodiment, and the transmitting module 100 includes a light source 10, a lens 20 and a circuit board 30, except that:

the emission module 100 further includes a diffractive optical element 50, wherein the diffractive optical element 50 is annular and is sleeved on the exit surface 26 of the lens 20.

In this way, the laser emitted from the emitting surface 26 through the diffractive optical element 50 projects a plurality of linear laser spots in a direction perpendicular to the axis of the lens 20, so as to reduce the attenuation of the laser energy with the increase of the distance, and to increase the depth measurement distance and the resolution of the camera module with the emitting module 100. Further, the diffractive optical element 50 may be a flexible diffractive optical element, and may adjust the linearly emitted laser light into a plurality of linear spots. Enabling large angle depth detection in a direction perpendicular to the axis of the lens 20.

Further, the transmitting module 100 also satisfies the following formula:

10*P<L；

where L is the radial width of the annular protrusion 222 of the lens 20, the diffractive optical element 50 has an array of microstructures, and P is the maximum dimension of the microstructures.

In another embodiment, the diffractive optical element 50 can be disposed on at least one of the exit surface 26 and the reflective surface 24. For example, the diffractive optical element 50 may be a diffractive microstructure and may be provided integrally with the exit surface 26 and the reflection surface 24, that is, directly on the exit surface 26 and the reflection surface 24, or may be provided separately, that is, on the exit surface 26 and the reflection surface 24.

In this way, the reflected laser beam is diffracted by the diffractive optical element 50 and then projected, so as to improve the projection of a plurality of linear laser spots by the emission module 100 in the direction perpendicular to the axis of the lens 20, thereby reducing the attenuation of the laser energy along with the increase of the distance.

Referring to fig. 9, a third embodiment of the present application provides an electronic device 200 including the transmitting module 100 according to the above embodiment.

In this embodiment, the electronic device 200 is an intelligent terminal, and it can be understood that the electronic device 200 can also be furniture equipment such as a sweeping robot, vehicle-mounted equipment, and the like.

The electronic device 200 projects incident laser along 360-degree circumference through the transmitting module 100, so that the detecting angle of the electronic device 200 with the transmitting module 100 is 360 degrees.

In addition, those skilled in the art should recognize that the above embodiments are illustrative only, and not limiting, and that suitable modifications and variations to the above embodiments are within the spirit and scope of the invention as claimed.

Claims (10)

1. A lens, comprising:

the incident surface is used for collimating incident laser and transmitting the laser in the lens along the axial direction;

the reflecting surface is arranged opposite to the incident surface along the axial direction and is used for projecting the incident laser along the circumferential direction after being reflected;

the annular emergent surface is opposite to the reflecting surface along the circumferential direction and is used for projecting the reflected laser along the emergent surface.

2. The lens of claim 1,

the incident surface is provided with an annular bulge part which is used for collimating incident laser; the light source is provided with an annular light emitting area, and the annular bulge part corresponds to the annular light emitting area of the light source.

3. The lens of claim 1 or 2, wherein the reflecting surface has a triangular or trapezoidal cross section in the axial direction of the lens, and the reflecting surface has a circular cross section in the direction perpendicular to the axial direction of the lens.

4. The lens of claim 3, further comprising:

and a reflective film covering the reflective surface.

5. The lens of claim 1, wherein the lens comprises a cylindrical body, one side of the cylindrical body in the axial direction is the incident surface, the other side has an inwardly recessed undercut, an interface between the undercut and the cylindrical body forms the reflective surface, and a peripheral wall surface of the cylindrical body forms the annular exit surface.

6. An emitter module comprising the lens of any of claims 1-5, the emitter module further comprising:

and the annular diffraction optical element is sleeved on the emergent surface of the lens.

7. The transmit module of claim 6, wherein the following formula is satisfied:

10*P<L；

wherein L is the radial width of the annular convex part of the lens, the diffractive optical element is provided with an array of microstructures, and P is the maximum size of the microstructures.

8. The transmit module of claim 6 or 7, wherein the transmit module further comprises:

the lens comprises a shell, a light source and a lens, wherein the shell is provided with an accommodating cavity, the accommodating cavity is provided with an inlet and an outlet, the light source is positioned at the position of the accommodating cavity close to the inlet, and the lens is positioned at the position of the accommodating cavity close to the outlet and at least partially penetrates through the outlet.

9. An emitter module comprising the lens of any of claims 1-5, the emitter module further comprising:

and the diffraction microstructure is arranged on at least one of the reflecting surface and the annular emergent surface.

10. An electronic device, comprising:

the transmitter module of any one of claims 6 to 8.

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