CN212623374U - Integrated optical device and integrated projection module - Google Patents

Abstract

The utility model provides an integrated optical device and integrated module of throwing. Integrated optical device still includes including protective layer, first glue film, second glue film and the fixed bed of superpose in proper order: a diffractive structure; a light uniformizing structure; the diffraction structure is arranged on the first adhesive layer, the light uniformizing structure is arranged on the second adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped; or the diffraction structure is arranged on the second adhesive layer, the light uniformizing structure is arranged on the first adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped. The utility model provides a different scene structure light that uses throw the problem that the mode switches the difficulty with the time of flight throws among the prior art.

Description

Integrated optical device and integrated projection module

Technical Field

The utility model relates to an optical imaging equipment technical field particularly, relates to an integrated optical device and integrated module of throwing.

Background

With the rapid development of the optical industry, the 3D sensing system becomes more and more powerful, which has become a large industrial trend in the coming years. The structured light projection module is used for projecting the structured pattern outwards, and is an important component of the 3D sensing system. The module mainly comprises a vertical cavity surface emitting laser and a projection end lens, and the lens comprises a collimating mirror and a diffraction optical component. The laser forms uniform and parallel light beams after passing through the collimating mirror, and forms speckle point cloud after being modulated by a diffraction optical component and is projected on a measured object; unlike structured light projection modules, time-of-flight projection modules are mainly used to project a uniform light field outward, and are also a major component of emerging 3D sensing schemes. The component mainly comprises a vertical cavity surface emitting laser and a light homogenizing sheet. The laser emitted by the vertical cavity surface emitting laser is modulated by the dodging sheet to form a uniform light field which is projected on an object. The structured light scheme and the flight time scheme have respective advantages and disadvantages, different scene applications are different, and the mutual switching of the two projection modes is difficult to realize according to different application scenes.

That is to say, there is the problem in the prior art that the switching between the structured light projection mode and the time-of-flight projection mode is difficult in different application scenarios.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an integrated optical device and an integrated projection module to solve the problem of different application scene structure light projection modes and flight time projection mode switching difficulties in the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an integrated optical device, including a protective layer, a first adhesive layer, a second adhesive layer and a fixing layer which are stacked in sequence, further including: a diffractive structure; a light uniformizing structure; the diffraction structure is arranged on the first adhesive layer, the light uniformizing structure is arranged on the second adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped; or the diffraction structure is arranged on the second adhesive layer, the light uniformizing structure is arranged on the first adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped.

Further, the fixing layer includes: connecting the adhesive layer; the second adhesive layer is connected with the base layer through the connecting adhesive layer.

Further, the material of the protective layer comprises one of polyethylene terephthalate or glass; and/or the material of the substrate layer comprises one of polyethylene terephthalate or glass.

Further, the refractive index n1 of the first glue layer is greater than the refractive index n2 of the second glue layer; and/or the refractive index n2 of the second glue layer is smaller than the refractive index n3 of the third glue layer.

Further, the thickness of the first glue layer is more than or equal to 1 micrometer and less than or equal to 10 micrometers; and/or the thickness of the second glue layer is more than or equal to 10 micrometers and less than or equal to 100 micrometers; and/or the thickness of the connecting glue layer is more than or equal to 10 microns and less than or equal to 100 microns.

Furthermore, the diffraction structure is a diffraction grating, and the line width of the diffraction grating is more than or equal to 100 nanometers and less than or equal to 500 nanometers; and/or the depth of the diffraction grating is greater than or equal to 500 nanometers and less than or equal to 1500 nanometers.

Further, the light homogenizing structure is arranged on the second adhesive layer and comprises a plurality of micro lenses, the micro lenses are arranged on one side, close to the fixed layer, of the second adhesive layer and connected with the fixed layer, and the height of each micro lens is greater than or equal to 3 micrometers and less than or equal to 50 micrometers; and/or the diameter of the micro lens is more than or equal to 3 microns and less than or equal to 50 microns.

According to the utility model discloses an on the other hand provides an integrated module of throwing, include: the integrated optical device described above; the laser structure is arranged on one side, away from the protective layer of the integrated optical device, of the fixing layer of the integrated optical device; the lens is arranged between the integrated optical device and the laser structure, and at least part of the projection of the lens and the diffraction structure of the integrated optical device to the laser structure is overlapped; the projection structure is electrically connected with the laser structure, the projection structure is used for emitting light to an object and receiving reflected light of the object, the integrated projection module measures the distance L between the integrated projection module and the object, the distance L is fed back to the laser structure, and the laser structure emits laser to the dodging structure or the diffraction structure of the integrated optical device according to the size of the distance L.

Further, the laser structure includes: the first vertical cavity surface emitting laser is at least partially overlapped with the projection of the diffraction structure to the laser structure; the second vertical cavity surface emitting laser is at least partially overlapped with the projection of the light homogenizing structure to the laser structure; when the distance L is greater than the preset distance L0, the second vertical cavity surface emitting laser emits laser to the light uniformizing structure, and when the distance L is less than the preset distance L0, the first vertical cavity surface emitting laser emits laser to the diffraction structure.

Further, the laser structure includes: a laser; the laser device is arranged on the mobile device.

Further, the projection structure includes: an emission end lens for emitting light to an object; the receiving end lens is used for receiving the light reflected by the object; the integrated projection module further comprises a calculation module, the calculation module is electrically connected with the transmitting end lens and the receiving end lens, and the calculation module is used for calculating the distance L according to the transmitting time of the transmitting end lens and the receiving time of the receiving end lens.

By applying the technical scheme of the utility model, the integrated optical device comprises a protective layer, a first adhesive layer, a second adhesive layer and a fixed layer which are sequentially superposed, and also comprises a diffraction structure and a light uniformization structure; the diffraction structure is arranged on the first adhesive layer, the light uniformizing structure is arranged on the second adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped; or the diffraction structure is arranged on the second adhesive layer, the light uniformizing structure is arranged on the first adhesive layer, and the projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped.

The diffraction structure is arranged on the first adhesive layer, and the dodging structure is arranged on the second adhesive layer, so that an integrated optical device has the diffraction function and the dodging function. Therefore, one integrated optical device can perform structured light projection and flight time projection, the volumes of the two devices are effectively reduced, and the devices meet the requirement of miniaturization. The projections of the diffraction structure and the light uniformizing structure to the fixed layer are not overlapped, so that the diffraction structure and the light uniformizing structure are separately arranged, the diffraction structure and the light uniformizing structure can be independently used, and the interference between the diffraction structure and the light uniformizing structure is avoided. Meanwhile, the switching between the structured light projection and the flight time projection is more convenient. Of course, the diffraction structure can also be arranged on the second adhesive layer, and the dodging structure is arranged on the first adhesive layer.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic diagram of an integrated optical device according to the present invention;

fig. 2 shows a schematic structural diagram of the integrated projection module of the present invention;

fig. 3 is a schematic structural diagram of a diffraction structure mother board in the process for manufacturing an integrated optical device according to the present invention;

FIG. 4 is a schematic diagram of the diffractive structure master spin coating of the integrated optical element fabrication process of the present invention;

FIG. 5 is a schematic diagram illustrating the reverse imprint of the integrated optical component fabrication process of the present invention;

fig. 6 shows a schematic structural diagram of the diffractive structure soft film daughter board of the manufacturing process of the integrated optical element of the present invention;

fig. 7 is a schematic structural diagram of a light uniformizing structure of the integrated optical element manufacturing process of the present invention;

fig. 8 shows a schematic view of the light homogenizing structure glue homogenizing of the fabrication process of the integrated optical element of the present invention;

fig. 9 shows a combined schematic diagram of the light uniformizing structure of the glue uniformizing and the soft film daughter board with the diffraction structure of the manufacturing process of the integrated optical element of the present invention;

figure 10 shows a schematic view of the imprint exposure of the integrated optical element fabrication process of the present invention.

Wherein the figures include the following reference numerals:

10. a protective layer; 20. a first glue layer; 21. a diffractive structure; 211. diffraction structure master mask; 212. a diffraction structure soft film daughter board; 30. a second adhesive layer; 31. a light uniformizing structure; 311. a microlens; 40. a fixed layer; 41. connecting the adhesive layer; 42. a base layer; 50. an integrated optical device; 60. a lens; 70. a laser structure; 71. a first vertical cavity surface emitting laser; 72. a second vertical cavity surface emitting laser; 80. a projection structure; 81. a transmitting end lens; 82. a receiving end lens; 90. an object.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, 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 application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that different scene structure light projection modes and flight time projection mode switch the difficulty among the prior art, the utility model provides an integrated device and throw the module.

As shown in fig. 1, the integrated optical device includes a protective layer 10, a first adhesive layer 20, a second adhesive layer 30 and a fixing layer 40, which are sequentially stacked, and further includes a diffraction structure 21 and a light uniformizing structure 31; wherein, the diffraction structure 21 is arranged on the first glue layer 20, the light uniformizing structure 31 is arranged on the second glue layer 30, and the projections of the diffraction structure 21 and the light uniformizing structure 31 to the fixed layer 40 are not overlapped; or the diffraction structure 21 is arranged on the second glue layer 30, the dodging structure 31 is arranged on the first glue layer 20, and the projections of the diffraction structure 21 and the dodging structure 31 to the fixed layer 40 are not overlapped.

By arranging the diffraction structure 21 on the first adhesive layer 20 and the light uniformizing structure 31 on the second adhesive layer 30, an integrated optical device has both diffraction function and light uniformizing function. Therefore, one integrated optical device can perform structured light projection and flight time projection, the volumes of the two devices are effectively reduced, and the devices meet the requirement of miniaturization. The projections of the diffraction structure 21 and the dodging structure 31 to the fixed layer 40 are not coincident, so that the diffraction structure 21 and the dodging structure 31 are separately arranged, and the diffraction structure 21 and the dodging structure 31 can be used independently to avoid interference between the two. Meanwhile, the switching between the structured light projection and the flight time projection is more convenient. Of course, the diffractive structure 21 may also be arranged on the second glue layer 30 and the light unifying structure 31 on the first glue layer 20.

Specifically, fixing layer 40 includes a connecting adhesive layer 41 and a base layer 42, and second adhesive layer 30 is connected to base layer 42 through connecting adhesive layer 41. Through setting up connection glue film 41 for second glue film 30 is more firm with being connected of stratum basale 42, increases overall structure intensity, plays the effect of accepting the device simultaneously, makes the device more stable in the use, reduces the risk that second glue film 30 and stratum basale 42 break away from.

Specifically, the material of the protective layer 10 includes one of polyethylene terephthalate or glass. Through being polyethylene terephthalate or glass with the material of protective layer 10, can make polyethylene terephthalate or glass play the effect of bearing and protecting to the device for the device is more firm, can effectively reduce the wearing and tearing to first glue film 20, effectively prolongs device life, has reduced the encapsulation process simultaneously, has practiced thrift process time. Of course, the protective layer 10 may be made of other materials having bearing and protecting functions.

Specifically, the material of substrate layer 42 includes one of polyethylene terephthalate or glass. Through being polyethylene terephthalate or glass with the material of stratum basale 42 for stratum basale 42 can play the effect of bearing the weight of the device, can effectively fix the device, makes the device more stable in the use. Of course, base layer 42 may be formed of other materials that carry the devices.

Specifically, the refractive index n1 of the first glue layer 20 is greater than the refractive index n2 of the second glue layer 30. By controlling the difference between the refractive index n1 of the first glue layer 20 and the refractive index n2 of the second glue layer 30, it can be ensured that all effective light rays are incident into the diffraction structure 21, so that the diffraction structure 21 has good diffraction performance, and the integrated optical device 50 can be ensured to have good structured light projection performance.

Specifically, the refractive index n2 of the second glue layer 30 is smaller than the refractive index n3 of the connection glue layer 41. By controlling the difference between the refractive index n2 of the second adhesive layer 30 and the refractive index n3 of the connection adhesive layer 41, it can be ensured that all effective light rays are incident into the light uniformizing structure 31, so that the light uniformizing structure 31 has good light uniformizing performance, and the integrated optical device 50 can be ensured to have good flight time projection performance.

Specifically, the thickness of the first glue layer 20 is greater than or equal to 1 micrometer and less than or equal to 10 micrometers. If the thickness of first glue film 20 is less than 1 micron for diffraction structure 21 is difficult for assembling in first glue film 20, also can not play the effect of connecting protective layer 10 and second glue film 30 simultaneously, if the thickness of first glue film 20 is greater than 10 microns, makes the thickness of first glue film 20 increase, easily makes first glue film 20 cause the influence to the transmission of light, can not satisfy miniaturized requirement simultaneously. Limiting the thickness of the first glue layer 20 to a range of 1 micron to 10 microns ensures that the diffractive structure 21 can stably fit into the first glue layer 20 while serving to connect the protective layer 10 and the second glue layer 30.

Specifically, the thickness of the second adhesive layer 30 is greater than or equal to 10 micrometers and less than or equal to 100 micrometers. If the thickness of second glue film 30 is less than 10 microns for even light structure 31 is difficult for assembling in second glue film 30, also can not play the effect of connecting first glue film 20 and connecting glue film 41 simultaneously, if the thickness of second glue film 30 is greater than 100 microns, makes the thickness of second glue film 30 increase, easily makes second glue film 30 cause the influence to the transmission of light, can not satisfy miniaturized requirement simultaneously. Limiting the thickness of the second glue layer 30 to be in the range of 10 micrometers to 100 micrometers can ensure that the light unifying structure 31 can stably fit into the second glue layer 30 while serving to connect the first glue layer 20 and the connection glue layer 41.

Specifically, the thickness of the connection adhesive layer 41 is greater than or equal to 10 micrometers and less than or equal to 100 micrometers. If the thickness of the connection glue layer 41 is less than 10 micrometers, the connection glue layer 30 and the substrate layer 42 cannot be connected, and if the thickness of the connection glue layer 41 is greater than 100 micrometers, the thickness of the connection glue layer is increased, so that the connection glue layer 41 is prone to influence the transmission of light, and the requirement of miniaturization cannot be met. Limiting the thickness of the connection adhesive layer 41 within a range of 10 micrometers to 100 micrometers can effectively ensure transmission of light in the connection adhesive layer 41 and simultaneously play a role in connecting the second adhesive layer 30 and the substrate layer 42.

Specifically, the diffraction structure 21 is a diffraction grating, and the line width of the diffraction grating is equal to or greater than 100 nm and equal to or less than 500 nm. If the line width of the diffraction grating is less than 100 nanometers, the brightness of the diffraction result is not obvious and is not easy to observe, and if the line width of the diffraction grating is more than 500 nanometers, the brightness distribution of the diffraction result is not uniform. The line width of the diffraction grating is limited within the range of 100 nanometers and 500 nanometers, so that the diffraction result with obvious brightness and uniform distribution can be obtained, and the performance of the diffraction structure 21 is ensured.

Specifically, the depth of the diffraction grating is not less than 500 nm and not more than 1500 nm. If the depth of the diffraction grating is less than 500 nm, the diffraction grating is not suitable for processing, which increases the processing cost, and if the depth of the diffraction grating is greater than 1500 nm, the assembling property of the diffraction structure 21 and the first adhesive layer 20 is affected. Limiting the depth of the diffraction grating to be within a range of 500 nm and equal to 1500 nm enables the diffraction structure 21 to be stably assembled in the first glue layer 20, and simultaneously reduces the processing difficulty.

Note that the diffraction grating is uniformly distributed on the first adhesive layer 20.

Specifically, the light uniformizing structure 31 is disposed on the second adhesive layer 30, the light uniformizing structure 31 includes a plurality of microlenses 311, the plurality of microlenses 311 are disposed on a side of the second adhesive layer 30 close to the fixing layer 40, and the microlenses 311 are connected to the fixing layer 40. By connecting the micro lens 311 with the fixed layer 40, the fixed layer 40 plays a role in bearing and protecting the micro lens 311, and the stability of the structure is increased.

It should be noted that the plurality of microlenses 311 are uniformly and continuously distributed on the second adhesive layer 30.

Specifically, the height of the microlens 311 is 3 micrometers or more and 50 micrometers or less. If the height of the microlens 311 is less than 3 micrometers, the difficulty of processing the microlens is increased, and if the height of the microlens 311 is greater than 50 micrometers, the difficulty of assembling the microlens 311 and the second adhesive layer 30 is increased. The height of the micro lens 311 is limited within the range of 3 micrometers and 50 micrometers, so that the processing difficulty is reduced while the stability of the micro lens 311 on the second adhesive layer 30 is ensured, and the performance stability of the micro lens 311 is further improved.

The height of the microlens 311 is the farthest distance between the microlens 311 and the fixed layer 40.

Specifically, the diameter of the microlens 311 is not less than 3 micrometers and not more than 50 micrometers. If the diameter of the microlens 311 is smaller than 3 microns, the difficulty in processing the microlens is increased, and if the diameter of the microlens 311 is larger than 50 microns, the difficulty in assembling the microlens 311 and the second adhesive layer 30 is increased, and meanwhile, the light uniformizing effect of the light uniformizing structure 31 is poor. The diameter of the micro lens 311 is limited within the range of 3 micrometers and 50 micrometers, so that the processing difficulty can be reduced while the stability of the micro lens 311 on the second adhesive layer 30 is ensured, and the performance stability of the micro lens 311 is improved to ensure the light uniformizing effect of the light uniformizing structure 31.

As shown in fig. 2, the integrated projection module includes the above-mentioned integrated optical device 50, a laser structure 70, a lens 60 and a projection structure 80, wherein the laser structure 70 is disposed on a side of the fixing layer 40 of the integrated optical device 50 away from the protective layer 10; lens 60 sets up between integrated optical device 50 and laser structure 70, and lens 60 and integrated optical device 50's diffraction structure 21 at least partly coincide to the projection of laser structure 70 and throw structure 80 and laser structure 70 electricity and be connected, throw structure 80 and be used for object 90 to launch light and receive the reflection light of object 90, integrated throw the module and measure the distance L between integrated projection module and the object 90, and feed back distance L to laser structure 70, laser structure 70 is according to the size of distance L to the even light structure 31 or the diffraction structure 21 transmission laser of integrated optical device 50. Through set up integrated optical device 50 in integrated module of throwing for structured light throws mode and time of flight and throws the mode and can switch over each other, and it is more convenient to use, can guarantee the miniaturization of integrated module of throwing simultaneously. By disposing the lens 60 between the integrating optical device 50 and the laser structure 70, and at least partially coinciding the projection of the lens 60 and the diffraction structure 21 of the integrating optical device 50 onto the laser structure 70, the laser light emitted by the laser structure 70 can reach the diffraction structure 21 of the integrating optical device 50 through the lens 60, so that the image can be formed through the diffraction structure 21 to realize the structured light projection mode. Through setting up projection structure 80 and laser structure 70 and being connected, make projection structure 80 can be to object 90 emission light and receive object 90's reflection light, so that integrated projection module can be according to projection structure 80 emission light and receive the time difference of light and measure distance L, and with distance L feedback to laser structure 70 in, realize laser structure 70 according to distance L and to the even light structure 31 or the diffraction structure 21 emission laser of integrated optical device 50, and then realize the interconversion of structured light projection mode and flight time projection mode.

Preferably, the lens 60 coincides completely with the projection of the diffractive structure 21 of the integrating optics 50 onto the laser structure 70. Of course, the lens 60 may also be located within the projection of the diffractive structure 21 of the integrating optics 50 onto the laser structure 70.

Specifically, the laser structure 70 includes a first vertical cavity surface emitting laser 71 and a second vertical cavity surface emitting laser 72, the first vertical cavity surface emitting laser 71 and the projection of the diffraction structure 21 to the laser structure 70 at least partially coincide; the second vertical cavity surface emitting laser 72 is at least partially overlapped with the projection of the dodging structure 31 to the laser structure 70; when the distance L is greater than the preset distance L0, the second vertical cavity surface emitting laser 72 emits laser light to the dodging structure 31, and when the distance L is less than the preset distance L0, the first vertical cavity surface emitting laser 71 emits laser light to the diffraction structure 21. By providing the first vertical cavity surface emitting laser 71 to at least partially coincide with the projection of the diffractive structure 21 onto the laser structure 70, the laser light emitted by the first vertical cavity surface emitting laser 71 is made to impinge on the diffractive structure 21, thereby constituting a structured light projection module. The second vertical cavity surface emitting laser 72 is at least partially overlapped with the projection of the dodging structure 31 to the laser structure 70, so that the laser emitted by the second vertical cavity surface emitting laser 72 is irradiated on the dodging structure 31, thereby constituting a time-of-flight projection module. When the distance L is greater than the preset distance L0, the second vcsel 72 emits laser light to the dodging structure 31, which is a time-of-flight projection module. When the distance L is smaller than the preset distance L0, the first vertical cavity surface emitting laser 71 emits laser light to the diffraction structure 21, which is the structured light projection module. Through judging the big or small relation of distance L and preset distance L0, realize the mutual switch-over between time of flight projection module and the structured light projection module for integrated projection module uses more extensively, and the practicality is stronger.

It should be noted that, in the present embodiment, the switching between the time-of-flight projection module and the structured light projection module is realized by controlling the operation of the first vertical cavity surface emitting laser 71 and the second vertical cavity surface emitting laser 72.

Specifically, the projection structure 80 includes an emission end lens 81 and a reception end lens 82, the emission end lens 81 being configured to emit light toward the object 90; the receiving end lens 82 is used for receiving the light reflected by the object 90; the integrated projection module further includes a calculating module electrically connected to the transmitting end lens 81 and the receiving end lens 82, and the calculating module is configured to calculate the distance L according to the transmitting time of the transmitting end lens 81 and the receiving time of the receiving end lens 82. Meanwhile, after the distance L is known, the calculation module determines the relationship between the distance L and the preset distance L0 to control the operation of the first vcsel 71 and the second vcsel 72.

As shown in fig. 3 to 10, the integrated optical device 50 is manufactured by the integrated optical device 50 manufacturing process, and the integrated optical device 50 manufacturing process includes the following steps: coating glue on the diffraction structure master 211 to form a first glue layer 20; arranging a protective layer 10 on the diffraction structure master 211 coated with the glue; reversely impressing the diffraction structure master 211, and separating the first glue layer 20 and the protective layer 10 from the diffraction structure master 211 to obtain a diffraction structure soft film daughter board 212; the light uniformizing structure 31 is connected to the fixing layer 40; coating glue on the light uniformizing structure 31 to form a second glue layer 30; a diffractive structure soft film daughter board 212 is attached to the side of the second glue layer 30 remote from the fixed layer 40 and is imprint exposed to form the integrated optical device 50. The integrated optical device 50 having the switching function between the time-of-flight projection module and the structured light projection module is manufactured by using the manufacturing process of the integrated optical device.

Example two

The difference from the first embodiment is that the specific structure of the laser structure 70 is different.

In this embodiment, the laser structure 70 includes a laser and a moving device, the laser is disposed on the moving device, the moving device changes the position of the moving device according to a distance L, when the distance L is greater than a preset distance L0, the moving device sends the laser below the light uniformizing structure 31, and when the distance L is less than a preset distance L0, the moving device sends the laser below the diffracting structure 21. The laser is arranged on the mobile device, so that the mobile device can change the position of the mobile device according to the distance L, the mutual switching between the structured light projection mode and the flight time projection mode is realized, only one laser is adopted, and the cost is reduced. In this embodiment, the time-of-flight projection module and the structured light projection module are switched by changing the position of the mobile device.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. An integrated optical device, comprising a protective layer (10), a first glue layer (20), a second glue layer (30) and a fixing layer (40) stacked in sequence, the integrated optical device further comprising:

a diffractive structure (21);

a light unifying structure (31);

wherein the diffraction structure (21) is arranged on the first glue layer (20), the dodging structure (31) is arranged on the second glue layer (30), and the projections of the diffraction structure (21) and the dodging structure (31) to the fixed layer (40) are not coincident; or the diffraction structure (21) is arranged on the second adhesive layer (30), the light uniformizing structure (31) is arranged on the first adhesive layer (20), and the projections of the diffraction structure (21) and the light uniformizing structure (31) to the fixed layer (40) are not overlapped.

2. The integrated optical device according to claim 1, wherein the fixed layer (40) comprises:

a connection glue layer (41);

a base layer (42), the second glue layer (30) being connected to the base layer (42) by the connecting glue layer (41).

3. The integrated optical device of claim 2,

the material of the protective layer (10) comprises one of polyethylene terephthalate or glass; and/or

The material of the base layer (42) comprises one of polyethylene terephthalate or glass.

4. The integrated optical device of claim 2,

the refractive index n1 of the first glue layer (20) is greater than the refractive index n2 of the second glue layer (30); and/or

The refractive index n2 of the second glue layer (30) is smaller than the refractive index n3 of the connection glue layer (41).

5. The integrated optical device of claim 2,

the thickness of the first glue layer (20) is more than or equal to 1 micrometer and less than or equal to 10 micrometers; and/or

The thickness of the second glue layer (30) is more than or equal to 10 micrometers and less than or equal to 100 micrometers; and/or

The thickness of the connecting glue layer (41) is more than or equal to 10 micrometers and less than or equal to 100 micrometers.

6. The integrated optical device according to any one of claims 1 to 5, characterized in that the diffractive structure (21) is a diffraction grating,

the line width of the diffraction grating is more than or equal to 100 nanometers and less than or equal to 500 nanometers; and/or

The depth of the diffraction grating is greater than or equal to 500 nanometers and less than or equal to 1500 nanometers.

7. The integrated optical device according to any one of claims 1 to 5, characterized in that the light unifying structure (31) is arranged on the second glue layer (30), the light unifying structure (31) comprising a plurality of microlenses (311), a plurality of the microlenses (311) being arranged on a side of the second glue layer (30) close to the fixed layer (40), and the microlenses (311) being connected with the fixed layer (40),

the height of the micro lens (311) is more than or equal to 3 micrometers and less than or equal to 50 micrometers; and/or

The diameter of the micro lens (311) is more than or equal to 3 micrometers and less than or equal to 50 micrometers.

8. An integrated projection module, comprising:

-an integrating optical device (50) according to any one of claims 1 to 7;

a laser structure (70), the laser structure (70) being arranged on a side of the fixation layer (40) of the integrating optics (50) facing away from the protection layer (10) of the integrating optics (50);

a lens (60), the lens (60) being arranged between the integrating optics (50) and the laser structure (70), and the lens (60) at least partially coinciding with a projection of the diffractive structure (21) of the integrating optics (50) onto the laser structure (70);

the projection structure (80), the projection structure (80) is electrically connected with the laser structure (70), the projection structure (80) is used for emitting light to an object (90) and receiving reflected light of the object (90), the integrated projection module is used for measuring a distance L between the integrated projection module and the object (90) and feeding back the distance L to the laser structure (70), and the laser structure (70) emits laser to the dodging structure (31) or the diffraction structure (21) of the integrated optical device (50) according to the size of the distance L.

9. The integrated projection module according to claim 8, wherein the laser structure (70) comprises:

a first VCSEL (71), the first VCSEL (71) being at least partially coincident with a projection of the diffractive structure (21) onto the laser structure (70);

a second vertical cavity surface emitting laser (72), the second vertical cavity surface emitting laser (72) being at least partially coincident with a projection of the dodging structure (31) onto the laser structure (70);

when the distance L is greater than a preset distance L0, the second vertical cavity surface emitting laser (72) emits laser to the dodging structure (31), and when the distance L is smaller than the preset distance L0, the first vertical cavity surface emitting laser (71) emits laser to the diffraction structure (21).

10. The integrated projection module according to claim 8, wherein the laser structure (70) comprises:

a laser;

a mobile device on which the laser is disposed.

11. The integrated projection module according to any of the claims 8 to 10, wherein the projection structure (80) comprises:

an emission end lens (81), the emission end lens (81) for emitting light to the object (90);

the receiving end lens (82), the receiving end lens (82) is used for receiving the light reflected by the object (90);

the integrated projection module further comprises a calculation module, the calculation module is electrically connected with the transmitting end lens (81) and the receiving end lens (82), and the calculation module is used for calculating the distance L according to the transmitting time of the transmitting end lens (81) and the receiving time of the receiving end lens (82).

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