WO2019134672A1

WO2019134672A1 - Laser emitter, optoelectronic device, and depth camera

Info

Publication number: WO2019134672A1
Application number: PCT/CN2019/070387
Authority: WO
Inventors: 白剑
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-01-06
Filing date: 2019-01-04
Publication date: 2019-07-11

Abstract

A laser emitter (10), an optoelectronic device (100), and a depth camera (1000). The laser emitter (10) comprises a light-emitting element array (12). The light-emitting element array (12) comprises multiple light-emitting elements (122) which are regularly arranged. The multiple light-emitting elements (122) are divided into multiple groups. Each group comprises at least one light-emitting element (122). Each light-emitting element (122) belongs to one of the multiple groups. The groups of light-emitting elements (122) are independently and simultaneously driven to emit light beams.

Description

Laser emitters, optoelectronic devices and depth cameras

Priority information

The present application claims priority to and the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the disclosure.

Technical field

The present application relates to the field of optics, and in particular to a laser emitter, an optoelectronic device, and a depth camera.

Background technique

Optoelectronic devices such as laser projectors are used to emit a set optical pattern to a target space, and optoelectronic devices are widely used in the field of optical-based three-dimensional measurement. The photoelectric device generally comprises a light source, a collimating element and a diffractive optical element, wherein the light source may be a single edge emitting laser light source, or an area array laser light source composed of a plurality of vertical cavity surface emitting lasers.

Summary of the invention

Embodiments of the present application provide a laser emitter, an optoelectronic device, and a depth camera.

A laser emitter of an embodiment of the present application includes an array of light emitting elements, the array of light emitting elements including a plurality of light emitting elements regularly distributed, the plurality of the light emitting elements being divided into a plurality of groups, each group comprising at least one light emitting element, each of the The light-emitting elements belong to one of the groups, and at the same time, the light-emitting elements are individually driven in groups to emit a light beam.

The photovoltaic device of the embodiment of the present application includes a substrate and the laser emitter described in the above embodiment, and the laser emitter is disposed on the substrate.

The depth camera of the embodiment of the present application includes the optoelectronic device, the image collector, and the processor according to the above embodiments; the image collector is configured to collect a laser pattern projected by the optoelectronic device into the target space; Connected to the optoelectronic device and the image collector, the processor for processing the laser pattern to obtain a depth image.

Additional aspects and advantages of the embodiments of the present invention will be set forth in part in the description which follows

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of a laser emitter according to some embodiments of the present application;

2 is a schematic structural view of an optoelectronic device according to some embodiments of the present application;

3 is a schematic structural diagram of an optoelectronic device according to some embodiments of the present application;

4 is a schematic diagram of a partial laser pattern generated by an optoelectronic device according to some embodiments of the present application;

5 is a schematic structural view of a laser emitter according to some embodiments of the present application;

6 is a schematic structural view of a laser emitter according to some embodiments of the present application;

7 is a partial structural schematic view of a laser emitter of some embodiments of the present application;

8 is a schematic structural view of a laser emitter according to some embodiments of the present application;

9 is a block diagram of a depth camera of certain embodiments of the present application.

Detailed ways

The embodiments of the present application are further described below in conjunction with the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions.

In addition, the embodiments of the present application, which are described below with reference to the accompanying drawings, are merely illustrative of the embodiments of the present invention, and are not to be construed as limiting.

In the present application, the first feature "on" or "below" the second feature may be the direct contact of the first and second features, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

Referring to FIG. 1, a laser emitter 10 of an embodiment of the present application includes an array of light emitting elements 12. The light emitting element array 12 includes a plurality of light emitting elements 122 that are regularly distributed, and the plurality of light emitting elements 122 are divided into a plurality of groups. Each group includes at least one light-emitting element 122, each light-emitting element 122 belonging to one of the groups, and at the same time, the light-emitting elements 122 are individually driven in groups to emit a light beam.

Referring to FIG. 1, the laser emitter 10 may further include a substrate 11, such as a semiconductor substrate, on which the light emitting element array 12 is disposed.

Referring to FIG. 1, in some embodiments, the plurality of sets of light emitting elements 122 includes a first set of light emitting elements 122 and a second set of light emitting elements 122. The first set of light-emitting elements 122 are regularly or irregularly distributed, and the second set of light-emitting elements 122 are regularly or irregularly distributed.

Referring to FIG. 1, in some embodiments, light emitting element 122 includes a point source light emitting device.

Referring to Figure 8, in some embodiments, each set of light emitting elements 122 is used to be driven to emit light beams of different light intensities.

Referring to Figure 8, in some embodiments, each set of light emitting elements 122 is used to be driven to emit light beams of different wavelengths.

Referring to Figure 8, in some embodiments, each set of light emitting elements 122 has a different light emitting area.

Referring to FIG. 1, in some embodiments, the point source illumination device is a vertical cavity surface emitting laser.

Referring to FIGS. 2 and 3 , the optoelectronic device 100 of the embodiment of the present application includes a substrate 20 and a laser emitter 10 disposed on the substrate 20 .

Referring to FIGS. 2 and 3 , in some embodiments, optoelectronic device 100 further includes a collimating element 30 and a diffractive optical element 40 . The collimating element 30 is disposed on a side of the substrate 20 that is adjacent to the laser emitter 10. The collimating element 30 is located between the laser emitter 10 and the diffractive optical element 40 for projecting the beam of light emitted by the illuminating element 122 to generate a laser pattern.

Referring to FIGS. 2 and 3, in some embodiments, each of the collimating elements 30 includes a lens; or each collimating element 30 includes a plurality of lenses that are sequentially disposed along the direction of illumination of the light-emitting elements 122.

Referring to FIG. 2 and FIG. 3, in some embodiments, the number of collimating elements 30 is one, one collimating element 30 corresponds to the light emitting element array 12; or the number of collimating elements 30 is plural, a plurality of The straight elements 30 are divided into groups, and each set of collimating elements 30 corresponds to each set of light emitting elements 122.

Referring to FIG. 2 and FIG. 3, in some embodiments, the number of collimating elements 30 is one, one collimating element 30 corresponds to the light emitting element array 12, and the collimating elements 30 are spaced apart from the corresponding light emitting element array 12; or The number of the collimating elements 30 is plural, and the plurality of collimating elements 30 are divided into a plurality of groups, each of which is corresponding to each of the light-emitting elements 122, and the collimating elements 30 are respectively integrated with the corresponding light-emitting elements 122 on the substrate. 11 on.

Referring to FIG. 3, in some embodiments, when the number of collimating elements 30 is plural, each set of collimating elements 30 has a different focal length.

Referring to FIG. 9 , the depth camera of the embodiment of the present application includes an optoelectronic device 100 , an image collector 200 , and a processor 300 . The image collector 200 is used to capture a laser pattern projected by the optoelectronic device 100 into the target space. The processor 300 is connected to the optoelectronic device 100 and the image collector 200, respectively, and the processor 300 is configured to process the laser pattern to obtain a depth image.

Referring to FIG. 1, a laser emitter 10 of an embodiment of the present application includes a semiconductor substrate 11 and a light emitting element array 12 disposed on the substrate 11. The array of light-emitting elements 12 includes a plurality of light-emitting elements 122 that are regularly distributed, the plurality of light-emitting elements 122 being divided into groups, each group comprising at least one light-emitting element 122, each light-emitting element 122 being attributed to one of the groups. Each group of light-emitting elements 122 is individually and simultaneously driven to emit a light beam, i.e., at the same time, the light-emitting elements 122 are individually driven in groups to emit a light beam.

Referring to FIG. 2 and FIG. 3 together, the laser emitter 10 of the embodiment of the present application can be used for the optoelectronic device 100. The optoelectronic device 100 includes a substrate 20, a laser emitter 10, a collimating element 30, and a diffractive optical element 40. The laser emitter 10 is disposed on the substrate 20, the collimating element 30 is disposed on a side of the substrate 20 adjacent to the laser emitter 10, the collimating element 30 is located between the laser emitter 10 and the diffractive optical element 40, and the diffractive optical element 40 is used The light beam emitted by the light emitting element 122 is projected to generate a laser pattern. That is, the laser emitter 10 of the embodiment of the present application can be applied to the optoelectronic device 100 including the collimating element 30 and the diffractive optical element 40 to emit a light beam to generate a laser pattern; the laser emitter 10 of the embodiment of the present application also It can be applied to any photovoltaic device 100 that uses a laser emitter 10 to emit a light beam. At this time, the photovoltaic device 100 includes a substrate 20 and a laser emitter 10, and the laser emitter 10 is disposed on the substrate 20.

It will be appreciated that optoelectronic devices such as laser projectors are used to transmit a set optical pattern to a target space, and optoelectronic devices are widely used in the field of optical based three-dimensional measurement. The photoelectric device generally comprises a light source, a collimating element and a diffractive optical element, wherein the light source may be a single edge emitting laser light source, or an area array laser light source composed of a plurality of vertical cavity surface emitting lasers. An optoelectronic device based on a single edge emitting laser source can emit a laser pattern with higher correlation, but its volume will increase significantly as the output power increases, and the uniformity of the laser pattern is poor; Two optoelectronic devices that emit a laser source with a vertical cavity surface can emit a laser pattern of the same power and higher uniformity in a smaller volume, but the laser pattern is less correlated, and the laser pattern is uncorrelated. The height directly affects the depth of the depth image and the speed of the depth image.

In the laser emitter 10 and the optoelectronic device 100 of the embodiments of the present application, the plurality of light-emitting elements 122 are regularly distributed to form a highly uniform laser pattern, and each group of the light-emitting elements 122 is separately and simultaneously driven to emit a light beam to improve the laser pattern. Correlation, thereby increasing the speed and accuracy of obtaining a depth image of the laser pattern.

Specifically, the plurality of light emitting elements 122 are at least two light emitting elements 122, and the plurality of sets of light emitting elements 122 are at least two sets of light emitting elements 122. A light source comprising at least two light-emitting elements 122 can increase the output power of the photovoltaic device 100 and meet the volume requirements of the photovoltaic device 100; at the same time, the irrelevance of the laser pattern produced by the photovoltaic device 100 based on the at least two sets of light-emitting elements 122 is more high.

It should be noted that the irrelevance of the laser pattern refers to the uniqueness of the laser pattern generated by the light beam emitted by each of the light-emitting elements 122, and the uniqueness includes the uniqueness of the shape, size, arrangement position, and the like of the laser pattern. For example, the irrelevance of the laser pattern a and the laser pattern b in FIG. 4 is smaller than the irrelevance of the laser pattern a and the laser pattern c.

The plurality of light-emitting elements 122 are regularly distributed as a whole, and the regular distribution may be a matrix distribution as shown in FIG. 1 (the rows and columns are criss-crossed, and the rows and columns are perpendicular to each other), or are arranged in an annular shape as shown in FIG. 5. Or a parallelogram distribution as shown in FIG. 6 (the rows and columns are criss-crossed, and the angle between the rows and columns is not 90 degrees), or equally spaced along a predetermined direction; or any distribution having a certain regularity. No restrictions. It can be understood that manufacturing a plurality of regularly arranged light-emitting elements 122 on the same semiconductor substrate 11 can greatly improve manufacturing efficiency. For example, the plurality of light-emitting elements 122 are m*n lattices, wherein m and n are integers greater than or equal to one. The plurality of light emitting elements 122 are divided into a plurality of groups, and each of the light emitting elements 122 may be regularly distributed or irregularly distributed. In the laser emitter 10 shown in Fig. 1, m = 8, n = 12, and a plurality of light-emitting elements 122 are divided into two groups. The first set of light emitting elements 122 and the second set of light emitting elements 122 are each randomly distributed. Of course, in other examples, the first group of light-emitting elements 122 and the second group of light-emitting elements 122 may each be regularly distributed; or the first group of light-emitting elements 122 are regularly distributed, and the second group of light-emitting elements 122 are irregularly distributed; The first group of light-emitting elements 122 are irregularly distributed, and the second group of light-emitting elements 122 are regularly distributed or the like. The first group of light-emitting elements 122 and the second group of light-emitting elements 122 may be the same or different light-emitting elements 122, for example, the first group of the plurality of light-emitting elements 122 are the same, the second group of the plurality of light-emitting elements 122 are the same, the first group The light-emitting element 122 and the second group of light-emitting elements 122 are different light-emitting elements 122 (as shown in FIG. 1); or the plurality of light-emitting elements 122 of the first group are identical to the plurality of light-emitting elements 122 of the second group (see FIG. 5). Or a plurality of light-emitting elements 122 of the first group are not identical, the plurality of light-emitting elements 122 of the second group are not identical, and the plurality of light-emitting elements 122 of the first group and the plurality of light-emitting elements 122 of the second group Corresponding to the same (as shown in FIG. 6); or the plurality of light-emitting elements 122 of the first group are completely different, the plurality of light-emitting elements 122 of the second group are completely different, and the plurality of light-emitting elements 122 of the first group are more than the second group The light-emitting elements 122 correspond to the same (as shown in FIG. 7) and the like, and are not limited herein.

The number of each group of light-emitting elements 122 may be identical, partially identical, or completely different. For example, the plurality of light-emitting elements 122 are divided into four groups, and the number of the first group of light-emitting elements 122, the second group of light-emitting elements 122, the third group of light-emitting elements 122, and the fourth group of light-emitting elements 122 are both N1 (see FIG. 8). As shown, N1 = 24); or the number of the first group of light-emitting elements 122 is N1, the number of the second group of light-emitting elements 122 and the third group of light-emitting elements 122 are N2, the number of the fourth group of light-emitting elements 122 is N3; Or the number of the first group of light-emitting elements 122 is N1, the number of the second group of light-emitting elements 122 is N2, the number of the third group of light-emitting elements 122 is N3, and the number of the fourth group of light-emitting elements 122 is N4, where N1≠N2 ≠N3≠N4.

The spacing between the plurality of light emitting elements 122 can be determined according to the density of the laser pattern to be formed. For example, the spacing between the plurality of light emitting elements 122 may be configured such that the gaps between the formed laser patterns are small and do not overlap.

In some embodiments, the illuminating element 122 comprises a point source illuminating device, and the point source illuminating device can be a Vertical-Cavity Surface-Emitting Laser (VCSEL) or other type of point source illuminating device.

Specifically, the VCSEL is a novel laser that emits light on a vertical surface. Compared with a conventional edge-emitting laser such as a Distributed Feedback Laser (DFB), the VCSEL has a light-emitting direction perpendicular to the substrate 11, which is relatively easy. Realize high-density two-dimensional array integration for higher power output, and because it has a smaller volume than edge-emitting lasers, it is easier to integrate into small electronic components; VCSEL and fiber optic The coupling efficiency is high, so that a complicated and expensive beam shaping system is not required, and the manufacturing process is compatible with the light emitting diode, which greatly reduces the production cost.

The plurality of groups of light-emitting elements 122 can be respectively controlled by the same controller, or the plurality of groups of light-emitting elements 122 are respectively controlled by a plurality of controllers, that is, each group of light-emitting elements 122 is correspondingly controlled by one controller. The controller is for directly driving the light emitting element 122 to emit a light beam, or driving the light emitting element 122 by a plurality of conductors respectively connected to the plurality of sets of the light emitting elements 122 to emit a light beam. When the controller drives the light emitting element 122 through the conductor, a plurality of conductors are formed on the substrate 11 and connected to the light emitting element 122. For example, the laser emitter 10 includes six sets of light-emitting elements 122, and the number of conductors is six, each conductor is connected to a group of light-emitting elements 122, and the controller is configured to apply a control signal on the conductors to drive a group of light-emitting lights corresponding to the conductors. Element 122 emits a beam of light. In the embodiment of the present application, the controller simultaneously applies control signals to the respective conductors, but the control signals applied to the respective conductors may be different, so that the irrelevance of the laser pattern can be improved.

In some embodiments, each set of light emitting elements 122 is used to be driven to emit light beams of different light intensities.

Specifically, in the embodiment of the present application, the plurality of sets of the light-emitting elements 122 emit light at the same time, and the intensity of the light beam emitted by each set of the light-emitting elements 122 can be freely controlled. For example, referring to FIG. 8, a plurality of light-emitting elements 122 are divided into four groups, a first group of light-emitting elements 122 for emitting a light beam having a light intensity of L1, and a second group of light-emitting elements 122 for emitting a light beam having a light intensity of L2. The third group of light-emitting elements 122 is for emitting a light beam having a light intensity of L3, and the fourth group of light-emitting elements 122 is for emitting a light beam having a light intensity of L4, wherein L1 ≠ L2 ≠ L3 ≠ L4. In this manner, by controlling the intensity ratios of the light beams of the different groups of the light-emitting elements 122, the light beams can sequentially obtain the spots of different shapes after passing through the collimating elements 30 and the diffractive optical elements 40, thereby generating a laser pattern having a high degree of correlation. Of course, in other embodiments, the first group of light-emitting elements 122 can be used to emit a light beam having a light intensity of L1, the second group of light-emitting elements 122 and the third group of light-emitting elements 122 are used to emit a light beam having a light intensity of L2, the fourth group The light-emitting element 122 is for emitting a light beam having a light intensity of L3. That is, at least one set of light-emitting elements 122 is used to be driven to emit light beams of different light intensities.

In some embodiments, each set of light emitting elements 122 is used to be driven to emit light beams of different wavelengths.

Specifically, in the embodiment of the present application, the plurality of sets of the light-emitting elements 122 emit light at the same time, and the wavelength of the light beam emitted by each set of the light-emitting elements 122 can be freely controlled. For example, referring to FIG. 8, a plurality of light-emitting elements 122 are divided into four groups, a first group of light-emitting elements 122 for emitting a light beam of wavelength λ1, a second group of light-emitting elements 122 for emitting a light beam of wavelength λ2, and a third The group of light-emitting elements 122 are for emitting light beams of wavelength λ3, and the fourth group of light-emitting elements 122 are for emitting light beams of wavelength λ4, where λ1 ≠ λ2 ≠ λ3 ≠ λ4. As described above, by controlling the wavelength ratios of the light beams of the different groups of the light-emitting elements 122, the light beams are sequentially passed through the collimating elements 30 and the diffractive optical elements 40, and light spots of different shapes can be obtained, and a laser pattern having high correlation is generated. Of course, in other embodiments, the first set of light-emitting elements 122 can be used to emit light beams of wavelength λ1, the second set of light-emitting elements 122 and the third set of light-emitting elements 122 are used to emit light beams of wavelength λ2, and the fourth set of light-emitting elements 122 is for emitting a light beam having a wavelength of λ3. That is, at least one set of light emitting elements 122 is used to be driven to emit light beams of different wavelengths.

Wherein, in the process of using the laser emitter 10, the light-emitting element 122 can emit light beams of different wavelengths by changing the temperature of the light-emitting element 122. In general, the higher the temperature of the light-emitting element 122, the higher the wavelength of the emitted light beam. Long; when the laser emitter 10 is manufactured, the plurality of groups of the light-emitting elements 122 are configured to emit light beams of different wavelengths. Thus, the control signals applied by the controller to the respective conductors can be the same, and the control logic of the light-emitting elements 122 is relatively simple. .

In some embodiments, each set of light emitting elements 122 has a different light emitting area.

Specifically, in the embodiment of the present application, the plurality of sets of the light-emitting elements 122 emit light at the same time, and each set of the light-emitting elements 122 has a different light-emitting area. For example, referring to FIG. 8 , the plurality of light-emitting elements 122 are divided into four groups, the light-emitting area of the first group of light-emitting elements 122 is S1, the light-emitting area of the second group of light-emitting elements 122 is S2, and the light of the third group of light-emitting elements 122 is emitted. The area is S3, and the light-emitting area of the fourth group of light-emitting elements 122 is S4, where S1≠S2≠S3≠S4. As described above, by arranging the different groups of the light-emitting elements 122 to have different light-emitting areas, the light beams are sequentially passed through the collimating elements 30 and the diffractive optical elements 40, and light spots of different shapes can be obtained, and a laser pattern having high correlation is generated. Of course, in other embodiments, the light emitting area of the first group of light emitting elements 122 is S1, the light emitting area of the second group of light emitting elements 122 and the third group of light emitting elements 122 is S2, and the light emitting area of the fourth group of light emitting elements 122 is S3. . That is, at least one set of light emitting elements 122 has different light emitting areas.

In some embodiments, each set of light-emitting elements 122 is used to be driven to emit light beams of different light intensities, different wavelengths, and have different light-emitting areas; or each set of light-emitting elements 122 is used to be driven to emit different light intensities, Light beams of different wavelengths and having the same light-emitting area; or each set of light-emitting elements 122 for being driven to emit light beams of different light intensities, of the same wavelength, and having different light-emitting areas; or each set of light-emitting elements 122 for being driven To emit light beams of the same light intensity and different wavelengths, and have different light-emitting areas.

Referring to FIG. 2, in some embodiments, the number of collimating elements 30 is one, and one collimating element 30 corresponds to the array of light emitting elements 12. Thus, the manufacturing process is relatively simple. The light beams emitted by the plurality of light-emitting elements 122 pass through the collimating element 30 and are then projected by the diffractive optical element 40 to the target space to generate a laser pattern.

Referring to FIG. 3, in some embodiments, the number of collimating elements 30 is plural, and the plurality of collimating elements 30 are divided into a plurality of groups, and each set of collimating elements 30 corresponds to each set of light emitting elements 122. The light beams emitted by each set of light-emitting elements 122 first pass through collimating elements 30 corresponding to the set of light-emitting elements 122, and are then projected by the diffractive optical elements 40 to the target space to generate a laser pattern. Further, when the number of the collimating elements 30 is plural, each of the collimating elements 30 may have a different focal length. Among them, different focal lengths include the positive and negative and/or the size of the focal length. That is, each set of collimating elements 30 is capable of producing different diverging or converging beams. In this way, the irrelevance of the generated laser pattern can be further improved.

In the above embodiment, the collimating element 30 may be a lens, which is a convex lens or a concave lens, and the surface of the lens may be an aspherical surface, a spherical surface, a Fresnel surface, or a binary optical surface; or the collimating element 30 For a lens group consisting of a plurality of lenses arranged in sequence along the light-emitting direction of the light-emitting element 122, the plurality of lenses may be convex lenses or concave lenses, or partially convex lenses, and partially concave lenses, and the surface shape of each lens may be aspherical, Any of a spherical surface, a Fresnel surface, and a binary optical surface.

In some embodiments, when the number of the collimating elements 30 is one, the collimating elements 30 are spaced apart from the light emitting element array 12 (as shown in FIG. 2); when the number of the collimating elements 30 is plural, a plurality of The collimating elements 30 are integrated with the plurality of light emitting elements 122, respectively, on the substrate 11 (as shown in FIG. 3). As such, a plurality of collimating elements 30 and a plurality of light emitting elements 122 are integrated on the substrate 11 to facilitate reducing the volume of the optoelectronic device 100.

Referring to FIG. 9, a depth camera 1000 of an embodiment of the present application includes an optoelectronic device 100, an image collector 200, and a processor 300. The image collector 200 is used to capture a laser pattern projected by the optoelectronic device 100 into the target space. The processor 300 is connected to the optoelectronic device 100 and the image collector 200, respectively, and the processor 300 is configured to process the laser pattern to obtain a depth image.

Specifically, the image collector 200 may be an infrared camera, and the processor 300 calculates an offset value of each pixel point in the laser pattern and a corresponding pixel point in the reference pattern by using an image matching algorithm, and further obtains the laser according to the deviation value. The depth image of the pattern. The image matching algorithm may be a Digital Image Correlation (DIC) algorithm. Of course, other image matching algorithms can be used instead of the DIC algorithm.

In the depth camera 1000 of the embodiment of the present application, the plurality of light-emitting elements 122 are regularly distributed to form a highly uniform laser pattern, and each group of the light-emitting elements 122 is separately and simultaneously driven to emit a light beam, which can improve the irrelevance of the laser pattern, thereby improving Obtain the speed and accuracy of the depth image of the laser pattern.

In the description of the present specification, reference is made to the terms "some embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific examples", or "some examples" The description means that specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example two, three, unless specifically defined otherwise.

While the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

A laser emitter, comprising:

An array of light-emitting elements, the light-emitting element array comprising a plurality of light-emitting elements regularly distributed, the plurality of light-emitting elements being divided into a plurality of groups, each group comprising at least one light-emitting element, each of the light-emitting elements belonging to one of the groups At the same time, the light-emitting elements are individually driven in units of groups to emit a light beam.
The laser emitter of claim 1 wherein said laser emitter further comprises a substrate, said array of light emitting elements being disposed on said substrate.
The laser emitter according to claim 1, wherein the plurality of sets of the light-emitting elements comprise a first group of light-emitting elements and a second group of light-emitting elements, the first group of light-emitting elements being regularly distributed or irregularly distributed, The second group of illuminating elements are regularly distributed or irregularly distributed.
The laser emitter of claim 1 wherein said illuminating element comprises a point source illuminating device.
A laser emitter according to claim 1 wherein each set of said light emitting elements is adapted to be driven to emit light beams of different light intensities.
A laser emitter according to claim 1 wherein each set of said light emitting elements is adapted to be driven to emit light beams of different wavelengths.
The laser emitter of claim 1 wherein each set of said light emitting elements has a different light emitting area.
An optoelectronic device, comprising:

Substrate; and

a laser emitter, the laser emitter being disposed on the substrate, the laser emitter comprising:

An array of light-emitting elements, the light-emitting element array comprising a plurality of light-emitting elements regularly distributed, the plurality of light-emitting elements being divided into a plurality of groups, each group comprising at least one light-emitting element, each of the light-emitting elements belonging to one of the groups At the same time, the light-emitting elements are individually driven in units of groups to emit a light beam.
The photovoltaic device according to claim 8, wherein said laser emitter further comprises a substrate, and said array of light emitting elements is disposed on said substrate.
The optoelectronic device according to claim 8, wherein the optoelectronic device further comprises:

a collimating element disposed on a side of the substrate proximate the laser emitter; and

A diffractive optical element, the collimating element being located between the laser emitter and the diffractive optical element, the diffractive optical element for projecting a light beam emitted by the light emitting element to generate a laser pattern.
The photovoltaic device according to claim 8 or 10, wherein the plurality of sets of the light-emitting elements comprise a first group of light-emitting elements and a second group of light-emitting elements, the first group of light-emitting elements being regularly distributed or irregularly distributed, The second group of light emitting elements are regularly distributed or irregularly distributed.
The photovoltaic device according to claim 8 or 10, characterized in that the light-emitting element comprises a point source light-emitting device.
The optoelectronic device according to claim 8 or 10, characterized in that each set of said light-emitting elements is used to be driven to emit light beams of different light intensities.
An optoelectronic device according to claim 8 or 10, wherein each set of said light-emitting elements is adapted to be driven to emit light beams of different wavelengths.
The photovoltaic device according to claim 8 or 10, wherein each of said light-emitting elements has a different light-emitting area.
The photovoltaic device according to claim 10, wherein each of said collimating elements comprises a lens; or each of said collimating elements comprises a plurality of lenses, and said plurality of lenses emit light along said light emitting elements The directions are set in order.
The photovoltaic device according to claim 10, wherein the number of the collimating elements is one, and one of the collimating elements corresponds to the array of light emitting elements; or

The number of the collimating elements is plural, and the plurality of collimating elements are divided into a plurality of groups, and each of the collimating elements corresponds to each of the groups of the light emitting elements.
The photovoltaic device according to claim 10, wherein the number of the collimating elements is one, and one of the collimating elements corresponds to the array of light emitting elements, and the collimating elements and corresponding light emitting elements Array spacing; or the number of the collimating elements is plural, and the plurality of collimating elements are divided into a plurality of groups, each set of the collimating elements corresponding to each set of the light emitting elements, and the collimating elements respectively The corresponding light-emitting elements are integrated on the substrate.
The photovoltaic device according to claim 17 or 18, wherein each of said sets of collimating elements has a different focal length when said number of said collimating elements is plural.
A depth camera, comprising:

An optoelectronic device according to any of claims 8-19;

An image collector for collecting a laser pattern projected by the optoelectronic device into a target space; and

a processor coupled to the optoelectronic device and the image collector, respectively, the processor for processing the laser pattern to obtain a depth image.