CN217820943U - ToF emission module and electronic equipment comprising same - Google Patents
ToF emission module and electronic equipment comprising same Download PDFInfo
- Publication number
- CN217820943U CN217820943U CN202222124739.6U CN202222124739U CN217820943U CN 217820943 U CN217820943 U CN 217820943U CN 202222124739 U CN202222124739 U CN 202222124739U CN 217820943 U CN217820943 U CN 217820943U
- Authority
- CN
- China
- Prior art keywords
- light source
- superlens
- light
- tof
- transmitting module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The embodiment of the application provides a ToF emission module and contain its electronic equipment, belongs to three-dimensional measuring's technical field. The ToF emission module comprises a first light source, a second light source, a first super lens and a second super lens; the first light source and the second light source are arranged in parallel; the first super lens is arranged on the light emitting side of the first light source; the second super lens is arranged on the light emitting side of the second light source; wherein the first light source is a point cloud projection light source; the second light source is an illumination light source; the first superlens is configured to reflect the emergent light beam of the first light source and directly project the reflected light beam to form a point cloud; the second superlens is configured to reflect an exit beam of the second light source to form flood lighting. The ToF emission module integrates two functions of point cloud projection and flood lighting, and the miniaturization of the ToF emission module and the popularization and application of the ToF emission module in consumer-grade electronic equipment are promoted through a reflective design.
Description
Technical Field
The application relates to the technical field of three-dimensional measurement, specifically, the application relates to a ToF emission module and contain its electronic equipment.
Background
ToF, time of Flight (Time of Flight), is one of the three-dimensional measurement techniques. The principle is that the transmitting module transmits light pulses to an object to be measured, then receives the light pulses returned from the object, and calculates the depth information of the object to be measured by calculating the flight time of the light pulses.
With the generalization of the functions of electronic devices, more and more electronic devices have demanded three-dimensional measurement. In some consumer electronic devices (e.g., mobile phones), the ToF module is required to be used with a camera module, especially in low light conditions. The ToF transmitting module in the existing ToF module comprises a collimating lens group and a diffractive optical element, wherein the collimating lens group is based on a plurality of traditional refractive lenses, which is not beneficial to the miniaturization of the ToF transmitting module.
In the flash lamp in the prior art, at least one of a light reflecting bowl or a fresnel lens is generally adopted to complete the light distribution of the flash lamp. The flash lamp adopting the reflector for Light distribution has the advantages of high cost, high requirement on assembly precision, thicker thickness along the direction of an emergent optical axis of the flash lamp and influence on attractiveness due to exposure of a Light Emitting Diode (LED); the flash lamp adopting the Fresnel lens for light distribution is not light and thin enough, has low brightness and is imaged by stray light incidence interference at the edge part of the Fresnel lens.
Therefore, the ToF transmitting module and the flash lamp in the prior art are difficult to be miniaturized, and are not suitable for being used in consumer-grade electronic devices.
SUMMERY OF THE UTILITY MODEL
In view of this, in order to solve the technical problems that the ToF transmitting module and the flash lamp in the existing electronic device are difficult to be miniaturized and are not beneficial to the matching use of the ToF transmitting module and the flash lamp in the consumer-grade electronic device, the present disclosure provides the following technical solutions. The utility model discloses technical scheme is too single technical problem to prior art solution, provides showing and is different from prior art's solution.
In one aspect, an embodiment of the present application provides a ToF transmitting module, where the ToF transmitting module includes a first light source, a second light source, a first superlens and a second superlens;
the first light source and the second light source are arranged in parallel; the first super lens is arranged on the light-emitting side of the first light source; the second super lens is arranged on the light-emitting side of the second light source;
wherein the first light source is a point cloud projection light source; the second light source is an illumination light source; the first superlens is configured to reflect the emergent light beam of the first light source and directly project the reflected light beam to form a point cloud; the second superlens is configured to reflect an exit beam of the second light source to form flood illumination.
Optionally, a distance between the mounting reference surface of the first light source and the mounting reference surface of the second light source along a direction perpendicular to the mounting reference surface of the first light source is greater than or equal to zero.
Optionally, the first superlens is configured to receive only light emitted by the first light source; and also,
the second superlens is configured to receive only light emitted by the second light source.
Optionally, a distance from a center of the first superlens to a center of the first light source is less than or equal to a focal length of the first superlens.
Optionally, a distance from a center of the second superlens to a center of the second light source is smaller than a focal length of the second superlens.
Optionally, the ToF transmitting module further comprises a beam splitter; the beam splitter is disposed on a side of the first superlens facing the first light source, and the beam splitter is configured to receive only the light reflected by the first superlens to split the light reflected by the first superlens.
Optionally, the beam splitter comprises a diffractive optical element or a third superlens.
Optionally, the first light source is located in an object focal plane of the first superlens.
Optionally, the first light source comprises an area array light source based on a vertical cavity surface emitting laser or an area array light source based on an edge emitting laser.
Optionally, the second light source comprises a light emitting diode.
On the other hand, the embodiment of the present application further provides an electronic device, where the electronic device includes the ToF transmitting module provided in any of the above embodiments.
The technical method provided by the embodiment of the application at least has the following beneficial effects:
according to the ToF emission module provided by the embodiment of the application, a first light source and a second light source are arranged in parallel, wherein the first light source is a point cloud projection light source, and the second light source is an illumination light source; the first super lens is arranged on the light-emitting side of the first light source, and the second super lens is arranged on the light-emitting side of the second light source, so that the ToF transmitting module with the lighting function is realized, the miniaturization of the ToF transmitting module and the lighting device is promoted, and the ToF transmitting module and the lighting device are favorably matched for use; and first super lens and second super lens are the reflective, fold the light path through reflective super lens, have further compressed the volume of ToF emission module.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.
Fig. 1 is a schematic diagram illustrating an alternative structure of a ToF transmitting module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram illustrating yet another alternative ToF transmitting module provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram illustrating yet another alternative ToF transmitting module provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram illustrating yet another alternative ToF transmitting module provided in an embodiment of the present application;
fig. 5 is a schematic structural diagram illustrating yet another alternative ToF transmitting module provided in an embodiment of the present application;
FIG. 6 shows an alternative structure of a ToF emission module using a transmission-type superlens;
FIG. 7 is a schematic diagram illustrating an alternative structure of a point cloud projecting element of a ToF emitting module according to an embodiment of the present disclosure;
FIG. 8 is an alternative schematic diagram of the point cloud and flood illumination of the ToF emitter module provided by the embodiments of the present application;
FIG. 9 is a schematic diagram illustrating an alternative arrangement of a superlens provided by an embodiment of the present application;
FIG. 10 is a schematic diagram illustrating an alternative structure of a nanostructure provided by an embodiment of the present application;
FIG. 11 shows a schematic structural diagram of yet another alternative nanostructure provided by an embodiment of the present application;
FIG. 12 is a schematic diagram illustrating an alternative arrangement of nanostructures provided by embodiments of the present application;
FIG. 13 is a schematic diagram illustrating yet another alternative arrangement of nanostructures provided by embodiments of the present application;
fig. 14 shows a schematic diagram of another alternative arrangement of the nanostructures provided by the embodiments of the present application.
In the drawings, the figures respectively show:
10-a first light source; 20-a second light source; 30-a first superlens; 40-a second superlens; 50-a beam splitter;
101-point light source; 301-a substrate; 302-a nanostructure layer; 3021-nanostructures; 3022-filling.
Detailed Description
The present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments are shown. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals refer to like parts throughout. Also, in the drawings, the thickness, ratio and size of the components are exaggerated for clarity of illustration.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, "a," "an," "the," and "at least one" do not denote a limitation of quantity, but rather are intended to include both the singular and the plural, unless the context clearly dictates otherwise. For example, "a component" means the same as "at least one component" unless the context clearly dictates otherwise. "at least one of" should not be construed as limited to the quantity "one". "or" means "and/or". The term "and/or" includes any and all combinations of one or more of the associated listed items.
Unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms defined in commonly used dictionaries should be interpreted as having the same meaning as is in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "comprising" or "comprises" indicates the property, quantity, step, operation, component, part or combination thereof, but does not exclude other properties, quantities, steps, operations, components, parts or combination thereof.
Embodiments are described herein with reference to cross-sectional views that are idealized embodiments. Thus, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region shown or described as flat may typically have rough and/or nonlinear features. Also, the acute angles shown may be rounded. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.
Hereinafter, exemplary embodiments according to the present application will be described with reference to the accompanying drawings.
The miniaturization difficulty of the ToF module and the flash lamp in the prior art hinders the miniaturization of the ToF module and the popularization of the flash lamp in consumer-grade electronic equipment. The inventor of the present application has also found that, in the electronic device equipped with the ToF module in the prior art, only one additional ToF module is added on the basis of the original hardware. In other words, the ToF module and the flash lamp (or the fill light) are two modules that are independently installed respectively. This design approach results in the ToF module and the flash occupying an excessive amount of space in the electronic device. Such separate modules occupy an excessive amount of installation space, and obviously do not satisfy the requirements for miniaturization and lightness of electronic devices (e.g., mobile phones, wearable devices, unmanned aerial vehicles, etc.). For example, the ToF transmitting module and the flash lamp module that need to be separately assembled in the smart phone occupy too much installation space, and corresponding accommodating holes need to be reserved in the area of the back plate of the phone, which damages the integrity of the back plate and reduces the strength of the back plate.
In view of this, the present application provides a ToF transmitting module, which integrates two functions of ToF transmitting and flood lighting. As shown in fig. 1 to 5, the Tof emitting module includes a first light source 10 for projecting a point cloud and a second light source 20 for flood lighting.
Specifically, the first light source 10 and the second light source 20 are arranged in parallel. Further, a first superlens 30 is provided on the light exit side of the first light source 10. The first super lens 30 is reflective and is used for reflecting the emergent light beam of the first light source 10 and directly projecting the reflected light beam on the surface of the target object to form a point cloud. The light exit side of the second light source 20 is provided with a second superlens 40. The second superlens 40 is reflective and is used for reflecting the outgoing light beam of the second light source 20, so that the reflected light beam outgoing from the second superlens forms flood illumination on the surface of an object. The left diagram in fig. 8 shows an alternative schematic diagram of the point cloud directly projected by the reflected light rays of the first superlens 30. The right drawing in fig. 8 shows a schematic view of the flood lighting formed by reflection by the second superlens 40. In some alternative embodiments, the second superlens 40 is preferably an achromatic superlens to provide uniform illumination of the target object.
The projection range of the reflected light of the first superlens 30 and the projection range of the reflected light of the second superlens 40 at least partially overlap. The projection ranges of the reflected light rays of the first and second superlenses 30 and 40 are affected by the phase distribution of the superlens surface, the position of the superlens, and the posture of the superlens. The posture of the superlens may refer to an inclination angle of the superlens about a direction perpendicular to the light source installation. Preferably, the first superlens 30 is configured to receive only light emitted from the first light source 10, and the second superlens 40 is configured to receive only light emitted from the second light source 20.
Note that, the first light source 10 and the second light source 20 are arranged side by side in the embodiment of the present application does not mean that only the first light source and the second light source are arranged side by side on the same mounting reference surface. As shown in fig. 2 and 4, the juxtaposition of the first light source 10 and the second light source 20 further includes disposition in a direction spaced from the mounting reference plane of the first light source (or the second light source). Along the emergent direction of the light rays, the first light source and the second light source are arranged at the same height, and compared with the first light source and the second light source which are arranged at different heights, the process is simple. However, along the direction of light emergence, the heights of the first light source and the second light source are independently set, so that the ToF emitting module provided by the embodiment of the application can be adapted to more installation spaces. In the present specification, the second light source is higher than the first light source, and the installation positions of the first light source and the second light source are not limited thereto.
It should also be noted that, in the embodiment of the present application, the first light source 10 and the second light source 20 are arranged side by side, and the installation reference plane of the first light source 10 is parallel to the installation reference plane of the second light source 20, which can reduce the difficulty of the process. Here, the parallelism of the mounting reference surfaces means a generalized parallelism, that is, the mounting reference surface of the first light source and the mounting reference surface of the second light source may be overlapped with each other or may be provided at intervals in a direction perpendicular to the mounting reference surfaces. In some alternative embodiments, the mounting reference plane of the first light source 10 and the mounting reference plane of the second light source 20 may also be arranged non-parallel. The angle between the installation reference plane of the first light source 10 and the installation reference plane of the second light source 20 is not particularly limited as long as the point cloud view field and the flood lighting view field of the ToF emission module provided by the embodiment of the present application at least partially overlap.
According to the embodiment of the present application, as shown in fig. 1, the first light source 10 is a point cloud projection light source, and as shown in the partial schematic view of the first light source 10 in fig. 1, the first light source 10 includes an array of point light sources 101. Alternatively, the first light source 10 includes a Vertical Cavity Surface Emitting Laser (VCSEL) based area array light source or an Edge Emitting Laser (EEL) based area array light source. According to an embodiment of the present application, the second Light source 20 comprises a Light Emitting Diode (LED), or an LED array. In other words, the second light source 20 may be a single LED, a dual-lamp LED, or a multi-lamp LED. It will be appreciated that the infrared component contained in the LED spectrum has little or negligible interference with the infrared signal of the first light source 10.
According to an alternative embodiment of the present application, optionally, as shown in fig. 1, the first light source 10 and the second light source 20 are located on the same mounting reference plane. According to yet another alternative embodiment of the present application, as shown in fig. 2, the first light source 10 and the second light source 20 are located on different installation reference planes. Optionally, the elevation difference between the first light source 10 and the second light source 20 is greater than or equal to zero along the optical axis direction of the first light source or the second light source. Preferably, the second light source 20 is closer to the first superlens 30 than the first light source 10 in the optical axis direction of the first light source 10. In one embodiment, the distance between the center of the first light source 10 and the center of the first superlens 30 is less than or equal to the focal length of the first superlens. In yet another embodiment, the center of the second light source 20 is spaced from the center of the second superlens 40 by a distance less than or equal to the focal length of the second superlens 40. As shown in fig. 1 and 2, the first and second superlenses 30 and 40 are located on the same mounting reference plane. It is understood that the first superlens and the second superlens may have their own independent supports, or may share a common support.
It should be understood that the above parameters ensure the imaging accuracy of the ToF transmitting module provided in the embodiments of the present application, and the shape and size of the package structure of the ToF transmitting module are determined by the design requirements based on the above parameters.
The measurement accuracy is insufficient because the number of light spots in the point cloud generated by the reflection projection of the light emitted from the first light source 10 by only the first superlens 30 is small. In some alternative embodiments, the number of light points in the point cloud is increased by increasing the number of point light sources in the first light source 10, thereby increasing the measurement accuracy, but this approach is costly, power consuming and faces greater heat dissipation pressure during use. In this regard, the embodiments of the present application provide still another solution, see fig. 3 to 5.
Fig. 3 to fig. 5 are schematic structural diagrams illustrating an alternative ToF transmitting module according to an embodiment of the present application. In some optional embodiments, the ToF transmitting module further comprises a beam splitter 50. The beam splitter 50 is disposed at a side of the first superlens 30 facing the first light source 10, and the beam splitter 50 is configured to receive only the reflected light of the first superlens 30 to split the light reflected by the first superlens to form a point cloud array. The point cloud array is equivalent to a point cloud reconstructed array formed by directly projecting the first superlens 30. Preferably, in order to ensure that a perfect image exists in the middle of the generated point cloud image and obtain a more accurate point cloud image, the array is formed by arranging odd number of point clouds, and each point cloud in the array is a similar graph of the point light source array in the first light source. Namely, each point cloud is an array unit, and each array unit comprises a plurality of light spots for three-dimensional measurement.
It is understood that the shape of the emergent light of the first light source 10 and the second light source 20 in space is a cone. Optionally, the beam splitter 50 is located between a first cone of light formed by the exit beam of the first light source and a second cone of light formed by the exit beam of the second light source 20. Illustratively, the third superlens is positioned not to exceed a boundary of the second superlens and the first superlens in a direction perpendicular to the optical axis of the first light source. Therefore, the ToF transmitting module realizes that the measurement precision is improved under the conditions of not increasing the cost and not increasing the power consumption. As shown in fig. 3 and 4, the beam splitter 50 is a Diffractive Optical Element (DOE). As another example, FIG. 5 shows a schematic diagram where the beam splitter 50 is a third superlens. Compared with the stray light interference of DOE high-order diffraction, which causes low diffraction efficiency (generally not more than 50%), the third superlens has higher diffraction efficiency (up to 90% and above).
Fig. 6 shows a schematic structural diagram of a ToF emission module using a transmissive superlens, for ensuring the detection distance of the ToF emission module, a transmissive superlens with a long focal length is usually used, and the first light source 10 for point cloud projection needs to be disposed on the focal plane of the transmissive superlens, which makes the volume of the ToF emission module difficult to compress. In contrast, as shown in fig. 7, the first superlens provided in the embodiment of the present application is a reflective superlens, and a distance between the first light source and the first superlens is not limited by a focal length of the transmissive superlens. Therefore, the first superlens folds the light path, and the volume of the ToF emission module is compressed.
The superlens provided by the embodiment of the present application will be described in detail with reference to fig. 9 to 14. The superlens is a specific application of the super-surface technology, and the amplitude, the phase and the polarization of incident light are modulated by nano structures periodically arranged on a substrate. As shown in fig. 9, the superlenses provided by the embodiments of the present application each include a substrate 301 and a nanostructure layer 302. The nanostructure layer 302 includes nanostructures 3021 periodically arranged on one side of the substrate 301. And, the surface of the substrate 301 near one side of the nanostructure layer is a reflective surface for emitting incident light.
According to an embodiment of the present application, optionally, in the nanostructure layer, the arrangement period of the nanostructures is greater than or equal to 0.3 λ c And is less than or equal to 2 lambda c (ii) a Wherein λ is c The center wavelength of the operating band. According to an embodiment of the present application, optionally, the height of the nanostructures in the nanostructure layer is greater than or equal to 0.3 λ c And is less than or equal to 5 lambda c (ii) a Wherein λ is c The center wavelength of the operating band.
FIGS. 10 and 11 show perspective views of nanostructures in a superlens. Optionally, the nanostructure in fig. 10 is a nanofin. Alternatively, the nanostructures in fig. 11 are cylindrical structures. Optionally, as shown in fig. 10 and 11, the superlens further includes fillers 3022, the fillers are filled between the nanostructures 3021, and an extinction coefficient of a material of the fillers 3022 to an operating wavelength band is less than 0.01. Optionally, filler 3022 includes air or other material that is transparent or translucent in the operating band. According to embodiments of the present application, the absolute value of the difference between the refractive index of the material of the filler 3022 and the refractive index of the nanostructures 3021 should be greater than or equal to 0.5.
In some alternative embodiments of the present application, as shown in fig. 12-14, the nanostructures included in the nanostructure layer 302 are arranged in an array in a close-packed pattern. The densely packed pattern is provided with nanostructures 3021 at vertices and/or central locations. In the embodiments of the present application, the close-packable pattern refers to one or more patterns that can fill the entire plane without gaps and overlapping.
As shown in fig. 12, according to an embodiment of the present application, the nanostructures 3021 may be arranged in a fan shape arranged in an array. As shown in fig. 13, the nanostructures 3021 may be arranged in regular hexagons in an array arrangement according to embodiments of the present application. In addition, as shown in fig. 14, according to an embodiment of the present application, the nanostructures 3021 may be arranged in a square array. Those skilled in the art will recognize that the superstructure units included in the nanostructure layer may also include other forms of array arrangements, and all such variations are contemplated within the scope of the present application.
Illustratively, the nanostructures provided by the embodiments of the present application may be polarization-independent structures, which impose a propagation phase on incident light. According to embodiments of the present application, the nanostructure may be a positive structure, and exemplary shapes of the nanostructure include a cylinder, a hollow cylinder, a square pillar, and a hollow square pillar. Optionally, the nanostructure is disposed in a central position of the superstructure unit. Optionally, the nanostructure is a negative nanostructure, such as a square pore column, a circular pore column, a square ring column, and a circular ring column.
In an alternative implementation, the superlens provided in the embodiments of the present application further includes an antireflection film. The antireflection film is arranged on one side of the substrate far away from the nanostructure layer; alternatively, an antireflection coating is disposed on a side of the nanostructure layer adjacent to air. The antireflection film plays a role in antireflection and reflection reduction on incident radiation.
According to an embodiment of the present application, the material of the nanostructure is a material having an extinction coefficient of less than 0.01 with respect to the operating band. For example, nanostructured materials include fused silica, quartz glass, crown glass, flint glass, sapphire, crystalline silicon, amorphous silicon, and hydrogenated amorphous silicon. For another example, when the operating wavelength band of the superlens is the near-infrared wavelength band, the material of the nanostructure includes one or more of silicon nitride, titanium oxide, gallium nitride, gallium phosphide, hydrogenated amorphous silicon, and crystalline silicon. For another example, when the working wavelength band of the superlens is visible light, the material of the nano-structure includes fused silica, quartz glass, crown glass, flint glass, sapphire and alkali glass. For another example, when the operating wavelength band of the superlens is the far infrared wavelength band, the material of the nanostructure includes one or more of crystalline silicon, crystalline germanium, zinc sulfide and zinc selenide.
For example, the material of the substrate includes fused silica, quartz glass, crown glass, flint glass, sapphire, crystalline silicon, amorphous silicon, and hydrogenated amorphous silicon. For another example, when the operating wavelength band of the superlens is the near infrared wavelength band, the material of the substrate includes one or more of silicon nitride, titanium oxide, gallium nitride, gallium phosphide, hydrogenated amorphous silicon, amorphous silicon and crystalline silicon. As another example, when the working wavelength band of the superlens is the visible wavelength band, the material of the substrate includes fused silica, quartz glass, crown glass, flint glass, sapphire, and alkali glass. For another example, when the operating wavelength band of the superlens is the far infrared wavelength band, the material of the substrate includes one or more of crystalline silicon, crystalline germanium, zinc sulfide, and zinc selenide.
In some embodiments of the present application, the material of the nanostructure is the same as the material of the substrate. In still other embodiments of the present application, the material of the nanostructure is different from the material of the substrate. Optionally, the material of the filler is the same as the material of the substrate. Optionally, the material of the filler is different from the material of the substrate.
It should be understood that in some alternative embodiments of the present application, the filler is a different material than the nanostructures. Illustratively, the material of the filler is a high-transmittance material in the working band, and the extinction coefficient of the high-transmittance material is less than 0.01. Exemplary materials for the filler include fused silica, quartz glass, crown glass, flint glass, sapphire, crystalline silicon, amorphous silicon, and hydrogenated amorphous silicon.
According to an embodiment of the present application, the phase of the superlens satisfies at least one of the following equations (1-1) to (1-6):
wherein r is the distance from the center of the superlens to the center of any nanostructure; lambda is the wavelength of operation and,
x, y are the mirror coordinates of the superlens, and f is the focal length of the first superlens.
The phase of the superlens may be expressed in higher order polynomials, including odd and even polynomials. In order not to destroy the rotational symmetry of the phase of the superlens, the phase corresponding to the even-order polynomial can be optimized, which greatly reduces the degree of freedom of the design of the superlens. In the formulas (1-1) to (1-6), compared with the other formulas (1-3) and (1-4), the phase satisfying the odd polynomial can be optimized without destroying the rotational symmetry of the phase of the superlens, so that the optimization degree of freedom of the superlens is greatly improved.
The superlens compatible semiconductor process provided by the embodiment of the application can be used for wafer-level packaging with a light source, so that the assembly precision and the system robustness of the ToF transmitting module are improved, and the overall size of the ToF transmitting module is further reduced.
The embodiment of the application further provides electronic equipment, which comprises the ToF transmitting module provided by any one of the above embodiments.
To sum up, in the ToF transmitting module provided by the embodiment of the present application, the first light source and the second light source are arranged in parallel, wherein the first light source is a point cloud projection light source, and the second light source is an illumination light source; and set up first super lens in the light-emitting side of first light source, set up the super lens of second in the light-emitting side of second light source, realized possessing the ToF emission module of illumination function, promoted ToF emission module and lighting device's miniaturization, be favorable to ToF emission module and lighting device's cooperation to be used. The point cloud projection element in the ToF emission module is integrated with the illumination element, so that the installation space is further saved, the number of installation holes in the backboard of the electronic equipment is reduced, the integrity of the backboard is ensured, and the strength of the backboard is increased. The first super lens and the second super lens of the ToF transmitting module are both reflective super lenses, so that the size of the ToF transmitting module is not limited by the focal length of the super lenses, and the size of the ToF transmitting module is further compressed in a folded light path mode.
The electronic equipment provided by the embodiment of the application integrates point cloud projection and floodlighting in the ToF emission module, realizes miniaturization, and promotes the landing application of the ToF module in the consumer-grade electronic equipment. The ToF transmitting module of the electronic equipment adopts a reflective design, greatly promotes the miniaturization of the ToF transmitting module, eliminates the protrusion on the back of the electronic equipment, and ensures the integrity and the strength of the back panel of the electronic equipment.
The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments disclosed in the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A ToF emission module is characterized in that the ToF emission module comprises a first light source (10), a second light source (20), a first superlens (30) and a second superlens (40);
the first light source (10) and the second light source (20) are arranged in parallel; the first superlens (30) is arranged on the light-emitting side of the first light source (10); the second superlens is arranged on the light-emitting side of the second light source (20);
wherein the first light source (10) is a point cloud projection light source; the second light source (20) is an illumination light source; the first superlens (30) is configured to reflect the outgoing light beam of the first light source (10) and directly project the reflected light beam to form a point cloud; the second superlens (40) is configured to reflect an outgoing light beam of the second light source (20) to form a flood illumination.
2. The ToF transmitting module according to claim 1, wherein the distance between the mounting reference plane of the first light source (10) and the mounting reference plane of the second light source (20) along a direction perpendicular to the mounting reference plane of the first light source (10) is greater than or equal to zero.
3. The ToF transmitting module according to claim 1, wherein said first superlens (30) is configured to receive only light rays emitted by said first light source (10); and also,
the second superlens (40) is configured to receive only light emitted by the second light source (20).
4. The ToF transmitting module according to claim 3, wherein the distance from the center of the first superlens (30) to the center of the first light source (10) is less than or equal to the focal length of the first superlens (30).
5. The ToF transmitting module according to claim 3, wherein the distance from the center of the second superlens (40) to the center of the second light source (20) is less than or equal to the focal length of the second superlens (40).
6. The ToF transmitting module according to any of the claims 1 to 4, wherein said ToF transmitting module further comprises a beam splitter (50); the beam splitter (50) is disposed at a side of the first superlens (30) facing the first light source (10), and the beam splitter (50) is configured to receive only the light reflected by the first superlens (30) to split the light reflected by the first superlens (30).
7. The ToF transmitting module according to claim 6, wherein said beam splitter (50) comprises a diffractive optical element or a third superlens.
8. The ToF transmitting module according to any of claims 1 to 4, wherein the first light source (10) is located in the object focal plane of the first superlens (30).
9. The ToF transmitting module according to any of the claims 1 to 4 wherein the first light source (10) comprises a vertical cavity surface emitting laser based area array light source or an edge emitting laser based area array light source.
10. The ToF emitting module according to any of the claims 1 to 3 or 5, wherein said second light source (20) comprises a light emitting diode.
11. An electronic device, characterized in that it comprises a ToF emitting module according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222124739.6U CN217820943U (en) | 2022-08-12 | 2022-08-12 | ToF emission module and electronic equipment comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222124739.6U CN217820943U (en) | 2022-08-12 | 2022-08-12 | ToF emission module and electronic equipment comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217820943U true CN217820943U (en) | 2022-11-15 |
Family
ID=83973943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222124739.6U Active CN217820943U (en) | 2022-08-12 | 2022-08-12 | ToF emission module and electronic equipment comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217820943U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
-
2022
- 2022-08-12 CN CN202222124739.6U patent/CN217820943U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11988844B2 (en) | 2017-08-31 | 2024-05-21 | Metalenz, Inc. | Transmissive metasurface lens integration |
| US11978752B2 (en) | 2019-07-26 | 2024-05-07 | Metalenz, Inc. | Aperture-metasurface and hybrid refractive-metasurface imaging systems |
| US11927769B2 (en) | 2022-03-31 | 2024-03-12 | Metalenz, Inc. | Polarization sorting metasurface microlens array device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217820943U (en) | ToF emission module and electronic equipment comprising same | |
| CN217981833U (en) | ToF emission module and electronic equipment comprising same | |
| JP4478028B2 (en) | Method for manufacturing a diffractive optical structure used in a light emitting device | |
| US7648256B2 (en) | Lighting system having lenses for light sources emitting rays at different wavelengths | |
| CN217820839U (en) | 3D-ToF emission module and depth camera comprising same | |
| WO2023093551A1 (en) | Point cloud projection system | |
| CN104360571A (en) | Optical apparatus and imaging system | |
| CN216896898U (en) | Automobile projection lamp based on super lens | |
| KR20040018327A (en) | Image display system | |
| WO2022183804A1 (en) | Optical element and optical module | |
| CN217982089U (en) | Light filling lamp and monitoring system comprising same | |
| ITTO940773A1 (en) | LIGHT GUIDE LIGHTING SYSTEM SUITABLE TO REALIZE A THIN LIGHTING DEVICE | |
| US20060279816A1 (en) | Holographic Combiners for Illumination of Spatial Light Modulators in Projection Systems | |
| EP3255687B1 (en) | Light emitting device | |
| EP3492960B1 (en) | Arched collimating lens forming a disk-like illumination | |
| CN113922204A (en) | Laser and projection equipment | |
| ITTO950764A1 (en) | MICROTELESCOPE LIGHTING SYSTEM INTEGRATED IN A TRANSPARENT SHEET | |
| CN101903819B (en) | Optoelectronic device, and image recording apparatus | |
| CN101619832A (en) | Lighting device | |
| EP1631855B1 (en) | Compact led module and projection display adopting the same | |
| RU2762176C1 (en) | Device for expanding an optical radiation beam and method for expanding an optical radiation beam for coherent illumination | |
| RU120747U1 (en) | LIGHT-Emitting DIODE MODULE | |
| EP3567426B1 (en) | Laser projection module, depth camera, and electronic device | |
| JP6822452B2 (en) | Light source device and projector | |
| JP2016186601A (en) | Reflection type diffusion plate and optical apparatus using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |