CN218298726U - Structured light generator and imaging device - Google Patents

Abstract

The utility model provides a structured light generator and image device, wherein, this structured light generator includes: a first light source, a second light source, a first superlens region, and a second superlens region; the first super lens area is positioned on the light-emitting side of the first light source and corresponds to the first light source, and the first super lens area can project light emitted by the first light source into speckles; the second super-lens area is positioned on the light-emitting side of the second light source and corresponds to the second light source, and the second super-lens area is used for uniformly projecting the light emitted by the second light source and forming floodlight. Through the embodiment of the utility model provides a structured light generator and imaging device through adopting two super lens region to realize throwing the light that first light source sent for the speckle, evenly throw the light that the second light source sent and form floodlight illumination, two kinds of functions combine together, simple structure need not to consider the alignment encapsulation of a plurality of lenses.

Description

Structured light generator and imaging device

Technical Field

The utility model relates to an electron and optical components and parts technical field particularly, relate to a structured light generater and image device.

Background

With the development of hardware and software, more and more mobile phones are equipped with 3D structured light technology. The functions of the system are not limited to facial recognition, and the system can be used for beautifying and self-photographing, virtual shopping, 3D printing (scanning by a mobile phone and then transmitting to a 3D printer), lovely shooting and the like. A typical 3D structured light apparatus mainly includes a dot matrix projector, a floodlight sensor (such as an infrared fill light), and a plurality of discrete components such as an infrared camera. The dot matrix projector projects 3 thousands of invisible light spots to the face to draw a 3D facial makeup; the floodlight sensing element identifies the human face under weak light by means of invisible infrared light; the infrared lens reads the dot matrix pattern, captures the infrared image of the face, and sends the data to the chip database for comparison and matching.

At present, structured light and flood lighting can be combined and spliced to form a structured light generator, but the structured light generator has the defects of more lenses, complex system, thicker thickness, high packaging difficulty and the like, and further has higher requirements on the installation space of a mobile phone, so that the mobile phone is difficult to achieve higher screen occupation ratio and further is lighter and thinner.

SUMMERY OF THE UTILITY MODEL

To solve the above problems, embodiments of the present invention provide a structured light generator and an imaging device.

In a first aspect, embodiments of the present invention provide a structured light generator, comprising: the light source comprises a first light source, a second light source, a first super lens area and a second super lens area, wherein the light emitting directions of the first light source and the second light source are consistent, and the first super lens area and the second super lens area are side-by-side super lens areas; the first super lens area is positioned on the light emitting side of the first light source and corresponds to the first super lens area, and the first super lens area can project light emitted by the first light source into speckles; the second super lens area is located on the light emitting side of the second light source and corresponds to the second light source, and the second super lens area is used for uniformly projecting light emitted by the second light source and forming floodlight illumination.

Optionally, the first superlens region and the second superlens region are different regions of the same superlens.

Optionally, the first light source and the second light source are independently controlled light sources and are alternately illuminated.

Optionally, the first superlens region is further configured to collimate light emitted by the first light source.

Optionally, the light emitted by the first light source and the second light source is infrared light.

Optionally, the first light source comprises one or more vertical cavity lasers; the second light source comprises one or more vertical cavity lasers or one or more light emitting diodes.

Alternatively, in the case where the first light source includes a plurality of vertical cavity lasers, the plurality of vertical cavity lasers are arranged randomly.

Optionally, the first superlens region comprises: a first super-surface nanostructure and a filling material filled around the first super-surface nanostructure; the first super-surface nano structure is used for modulating light rays emitted by the first light source into speckle structure light; the filling material filled around the first super-surface nanostructure is a transparent or semitransparent material in a working waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the first super-surface nanostructure is greater than or equal to 0.5; the second superlens region includes: a second super-surface nanostructure and a filling material filled around the second super-surface nanostructure; the second super-surface nano structure is used for uniformly modulating light rays emitted by the second light source and forming floodlight illumination; the filling material filled around the second super-surface nano structure is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the second super-surface nano structure is greater than or equal to 0.5.

In a second aspect, the embodiment of the present invention further provides an imaging device, including: a structured light generator and receiving means as described in any of the above; the structured light generator is used for projecting speckle structure light and uniform projection light to a target and forming floodlight illumination; the receiving device is used for receiving the speckle structure light and the uniform light reflected from the target at different moments.

Optionally, the imaging device further comprises: and the camera device is used for acquiring the image of the target.

The embodiment of the utility model provides a structured light generator, through adopting two super lens regions to realize throwing the light that first light source sent for the speckle and evenly throwing the light that the second light source sent and form floodlighting, this structured light generator compares in the common dot matrix projector and the floodlighting device that separately set up independently among the prior art, can combine two kinds of functions fine; moreover, compared with the means of directly combining the dot matrix projector and the floodlight device, the embodiment of the invention uses the super lens, and compared with the existing lenses (such as micro lens, ground glass, fresnel lens, etc.), the super lens selected by the structured light generator also has the advantages of light weight, thin overall thickness, simple system, lower price and high productivity, and can ensure that speckles and infrared light are irradiated to the whole target object or the surface of the target area and can be irradiated more uniformly; in addition, the structured light generator manufactured by using the superlens has simpler structure, does not need to consider alignment packaging among a plurality of lenses any more, and has lower cost. The embodiment of the utility model provides a pair of imaging device, owing to used more frivolous structured light generater, make this imaging device itself can directly combine two kinds of functions in an organic whole, for example at face identification's in-process, this imaging device can realize floodlight illumination through the even light of transmission, in order to be used for discerning people's face leading features (such as eyes, mouth etc.), and this imaging device can also be through the speckle structured light of throwing, in order to be used for further acquireing more accurate degree of depth information, and can make more frivolous and miniaturization, and then can reduce installation space, make imaging device's whole weight descend, can be applicable to the very harsh light sensing terminal of space requirement, such as cell-phone, AR/VR equipment etc..

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a structured light generator provided by an embodiment of the present invention;

fig. 2 shows a schematic diagram of a "first superlens region and a second superlens region" in a structured light generator provided by an embodiment of the present invention;

fig. 3 shows a specific structural diagram of "one first super-surface nanostructure in the first super-lens region and the filling material filled around the first super-surface nanostructure" in the embodiment of the present invention;

fig. 4 shows a schematic layout of a "first super-surface nanostructure" in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a "mobile terminal having an imaging device" in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present invention.

Icon:

1-a first light source, 2-a second light source, 3-a first superlens region, 4-a second superlens region, 7-a structured light generator, 8-a receiving device, 9-a camera device, 31-a first supersurface nanostructure, 32-a filling material around the first supersurface nanostructure.

Detailed Description

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

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

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

An embodiment of the present invention provides a structured light generator, as shown in fig. 1, comprising: a first light source 1, a second light source 2, a first superlens region 3, and a second superlens region 4. The light emitting directions of the first light source 1 and the second light source 2 are consistent, and the first super lens region 3 and the second super lens region 4 are super lens regions arranged side by side, namely the first super lens region 3 and the second super lens region 4 are coplanar. Fig. 1 shows an example in which the upper sides of the first light source 1 and the second light source 2 are light exit sides.

As shown in fig. 1, the first superlens area 3 is located on the light-emitting side of the first light source 1, and the first superlens area 3 and the light-emitting side of the first light source 1 correspond to each other, and the first superlens area 3 can project light emitted by the first light source 1 into speckles; the second super lens area 4 is located at the light-emitting side of the second light source 2 and corresponds to the second light source 2, and the second super lens area 4 is used for uniformly projecting the light emitted by the second light source 2 and forming floodlight illumination.

The embodiment of the present invention provides an in structured light generator, can include two light sources, i.e. first light source 1 and second light source 2, these two light sources can be set up side by side, if parallel arrangement is on a horizontal line, and the light-emitting direction of these two light sources is the same, i.e. the light-emitting side of first light source 1 and second light source 2 is in same one side. The structured light generator comprises, in addition to the first light source 1 and the second light source 2, two superlens regions, namely a first superlens region 3 and a second superlens region 4, which are also arranged side by side, wherein a schematic view of the first superlens region 3 and the second superlens region 4 can be seen in fig. 2; the first superlens region 3 may be disposed on a light emitting side of the first light source 1 (e.g., an upper side of the first light source 1 in fig. 1), and corresponds to the first light source 1, so as to project light emitted by the first light source 1 into speckles, where the speckles are a pattern of structured light. The second super-lens region 4 can be disposed on the light emitting side of the second light source 2 (e.g. the upper side of the second light source 2 in fig. 1), and corresponds to the second light source 2 to receive the light emitted from the second light source 2, and uniformly project the light emitted from the second light source 2 to form a flood illumination.

The embodiment of the utility model provides a through adopting two super lens regions to realize throwing the light that first light source 1 sent for the speckle and throwing the light that second light source 2 sent evenly and form floodlight illumination, this structured light generator compares in the common dot matrix projector and the floodlight lighting device that separately sets up independently among the prior art, can combine two kinds of functions fine; moreover, compared with the means of directly combining the dot matrix projector and the floodlight device, the embodiment of the invention uses the super lens, and compared with the existing lenses (such as micro lens, ground glass, fresnel lens, etc.), the super lens selected by the structured light generator also has the advantages of light weight, thin overall thickness, simple system, lower price and high productivity, and can ensure that speckles and infrared light are irradiated to the whole target object or the surface of the target area and can be irradiated more uniformly; in addition, the structured light generator manufactured by using the superlens has simpler structure, does not need to consider alignment packaging among a plurality of lenses any more, and has lower cost.

Optionally, the first superlens region 3 and the second superlens region 4 are different regions of the same superlens.

The embodiment of the utility model provides an in, first super lens area 3 can be a super lens with second super lens area 4, for example, this first super lens area 3 can make the formation with second super lens area 4 on same basement, if adopt lithography process to make on same basement to obtain partly regional first super lens area 3 for having the light that can incide to the speckle, another partly regional second super lens area 4 for having the light that can incide to the floodlight and evenly throw and form floodlight. The embodiment of the utility model provides an adopt super lens to combine together with the floodlight illumination of throwing speckle, simple structure, no longer need consider the alignment encapsulation between a plurality of lenses, the cost is lower.

Alternatively, the first light source 1 and the second light source 2 are independently controlled light sources and are alternately illuminated.

In the embodiment of the present invention, the first light source 1 and the second light source 2 are independently controlled light sources, for example, the first light source 1 can be controlled individually to be turned on or turned off, and the second light source 2 can be controlled individually to be turned on or turned off. The first light source 1 and the second light source 2 may be alternately turned on, for example, the first light source 1 may be turned on and turned off once, and the second light source 2 may be turned on and turned off once again, and this process may be referred to as an alternate turn-on; alternatively, the first light source 1 may be turned on and off once, the second light source 2 may be turned on and off once, and then the alternating process may be repeated a plurality of times from the turning on of the first light source 1, that is, the first light source 1 and the second light source 2 may be cyclically turned on and off a plurality of times. Because first light source 1 and second light source 2 need not lighten simultaneously under the general condition, this utility model embodiment is through two light sources of independent control, and light in turn, can guarantee that the condition of lightening simultaneously can not appear in two light sources, can be used for throwing the light of speckle through the transmission of first light source 1, also can be used for the light of floodlighting through the transmission of second light source 2.

Optionally, the first superlens region 3 is also used to collimate the light emitted by the first light source 1.

The embodiment of the utility model provides an in, before light that first light source 1 sent passes through first super lens area 3, before this light throws into the speckle through this first super lens area 3 promptly, this first super lens area 3 can also carry out collimation to the light that this first light source 1 sent and handle, wherein, this collimation is handled and is aimed at specific direction with light to form parallel light's processing procedure. After the first superlens area 3 collimates the light emitted by the first light source 1, the collimated light may be projected to form speckles, or the first superlens area 3 may collimate the light emitted by the first light source 1 and project the light to form speckles at the same time.

Optionally, the light emitted by the first light source 1 and the second light source 2 is infrared light.

Wherein, the light that first light source 1 and second light source 2 sent can be the infrared light in the invisible light, because the embodiment of the utility model provides a can realize carrying out under dark environment (like night or the weak environment of light) the throwing of speckle and floodlighting (like infrared light filling), consequently, can choose the light that first light source 1 and second light source 2 launched for use as the more suitable infrared light, can be better carry out the speckle and throw and floodlighting.

Optionally, the first light source 1 comprises one or more vertical cavity lasers; the second light source 2 comprises one or more vertical cavity lasers or one or more light emitting diodes.

A vertical cavity laser, which is a laser light source, can be used as the light source. In the embodiment of the present invention, the first light source 1 may be a single vertical cavity laser, that is, a vertical cavity laser emits light for projecting speckle; alternatively, the first light source 1 may be an array including a plurality of vertical cavity lasers, each of the vertical cavity lasers in the array may emit light for projecting speckle, and a plurality of light rays emitted through the array may be used as light for projecting speckle. In the embodiment of the present invention, the second light source 2 may be identical to the first light source, for example, it may be a laser light source including a single vertical cavity laser, i.e. one vertical cavity laser is used to emit light for uniform projection and implement flood lighting; alternatively, the second light source 2 may also be an array including a plurality of vertical cavity lasers, each of the vertical cavity lasers in the array may emit light for uniform projection and flood lighting, and a plurality of light beams emitted by the array may be used as light for uniform projection and flood lighting; in addition, since the second light source 2 needs to implement a function of uniformly projecting light to implement flood lighting, which does not need to generate speckle structure light that can be used for 3D photography, the second light source 2 may further include one or more light emitting diodes, which use light emitted from the one or more light emitting diodes for uniform projection and implement flood lighting, unlike the first light source 1.

The embodiment of the utility model provides an adopt single vertical cavity laser or the array that includes a plurality of vertical cavity lasers as first light source 1 or second light source 2, can collect high output and high conversion efficiency's advantages such as high quality light beam, compare in limit emission laser, in the angle all sides advantages such as accuracy, miniaturization, low-power consumption, reliability. Furthermore, for the second light source 2, a lower cost light emitting diode can be used as the light source, which further reduces the cost of the whole structured light generator.

Alternatively, in the case where the first light source 1 includes a plurality of vertical cavity lasers, the plurality of vertical cavity lasers are randomly arranged.

Wherein, when the first light source 1 is a light source including a plurality of vertical cavity lasers, the vertical cavity lasers may be randomly arranged. Compared with a common light source, the first light source 1 adopted by the embodiment of the utility model is the first light source 1 with a plurality of vertical cavity lasers which are arranged randomly, which can break the limitation that only a plurality of vertical cavity lasers which are arranged uniformly are used as light sources, and can form randomly arranged patterns; moreover, in the case that the first light source 1 includes a plurality of vertical cavity lasers arranged randomly, the random arrangement of the plurality of vertical cavity lasers may further perform an amplification and duplication function on light rays, compared with the case that a single vertical cavity laser is selected as the first light source 1.

Optionally, the first superlens region 3 includes: a first super surface nanostructure 31 and a filler material 32 filled around the first super surface nanostructure 31; the first super-surface nano structure 31 is used for modulating light emitted by the first light source 1 into speckle structure light; the filling material 32 filled around the first super-surface nano-structure 31 is a transparent or semitransparent material in the working waveband, and the absolute value of the difference between the refractive index of the filling material 32 and the refractive index of the first super-surface nano-structure 31 is greater than or equal to 0.5;

and, the second super lens region 4 includes: the second super-surface nano structure and filling material filled around the second super-surface nano structure; the second super-surface nanostructure is used for uniformly modulating light emitted by the second light source 2 and forming floodlight; the filling material filled around the second super-surface nano structure is transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the second super-surface nano structure is greater than or equal to 0.5.

In an embodiment of the present invention, referring to fig. 3, the first superlens region 3 may include one or more first super-surface nanostructures 31 and a filling material 32 filled around the first super-surface nanostructures 31. Wherein, in the working wavelength band of the vertical cavity laser in the first light source 1, each first super-surface nanostructure 31 in the first super-lens region 3 is transparent, i.e. has high transmittance for light in the working wavelength band; for example, if the first light source 1 composed of a vertical cavity laser is used in an imaging system, the operating band may be a visible light band, an infrared band, or the like. The first super-surface nanostructure 31 can modulate the incident light, for example, the incident light can be adjusted to be speckle structure light, and the first super-surface nanostructure 31 is an all-dielectric structure unit; the materials used for the first super-surface nanostructure 31 include: at least one of titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, amorphous silicon, crystalline silicon, and hydrogenated amorphous silicon. The filling material 32 filled around the first super-surface nano-structure 31 is also a material transparent or semi-transparent in the working band, i.e. the filling material 32 has high transmittance or transmittance between 40% and 60% for the light (such as infrared light) in the working band, so as to protect the nano-scale first super-surface nano-structure 31. The absolute value of the difference between the refractive index of the filling material 32 and the refractive index of the first super-surface nano-structure 31 is greater than or equal to 0.5, so as to avoid the filling material 32 from influencing the light modulation effect.

And, the second superlens region 4 may include one or more second supersurface nanostructures and a filling material filled around the second supersurface nanostructures, similar to the first superlens region 3. Wherein, in the working waveband of the vertical cavity laser (or the light emitting diode) in the second light source 2, each second super-surface nanostructure in the second super-lens region 4 is transparent, i.e. has high transmittance for the light in the working waveband; for example, if the second light source 2 formed of a vertical cavity laser is used in an imaging system, the operating band may be a visible light band, an infrared band, or the like. The second super-surface nanostructure can modulate the incident light, for example, the incident light can be modulated to be more uniform light, and flood lighting is formed, and the second super-surface nanostructure is an all-dielectric structural unit and is transparent in a working waveband; the second super-surface nano structure adopts materials comprising: at least one of titanium oxide, silicon nitride, fused silica, aluminum oxide, gallium nitride, gallium phosphide, amorphous silicon, crystalline silicon, and hydrogenated amorphous silicon. The filling material filled around the second super-surface nano-structure is also a material which is transparent or semitransparent in the working waveband, that is, the filling material has high transmittance or transmittance of 40-60% to the light (such as infrared light) in the working waveband, so as to protect the nano-scale second super-surface nano-structure. The absolute value of the difference between the refractive index of the filling material and the refractive index of the second super-surface nano structure is greater than or equal to 0.5, so that the filling material is prevented from influencing the light modulation effect.

In the embodiment of the present invention, the first super-surface nanostructure 31 (or the second super-surface nanostructure) is arranged in an array, the super lens is divided into a plurality of super-surface structure units by dividing, the super-surface structure units can be regular hexagon and/or square, and the central position of each super-surface structure unit, or the central position and the vertex position of each super-surface structure unit are provided with the first super-surface nanostructure 31 (or the second super-surface nanostructure). Referring to fig. 4, two division manners of the super-surface structure unit are schematically shown by dotted lines, in fig. 3, the super-surface structure unit is a square, and includes a first super-surface nanostructure 31 (or a second super-surface nanostructure) and a filling material 32 filled around the first super-surface nanostructure 31 (or a filling material filled around the second super-surface nanostructure), and the first super-surface nanostructure 31 (or the second super-surface nanostructure) is located at a central position of the super-surface structure unit. In addition, the first super surface nanostructure 31 (or the second super surface nanostructure) may be in a shape of a cylinder, a square column, etc., which may be determined based on actual conditions.

The embodiment of the present invention further provides an imaging device, as shown in fig. 5 (fig. 5 is a mobile terminal with a high screen ratio of the imaging device) and fig. 6 (fig. 6 is an upper portion of a mobile terminal with the imaging device), including: any one of the above-described structured light generator 7 and receiving device 8; wherein the structured light generator 7 is used for projecting speckle structured light to the target and for uniformly projecting light to the target and forming floodlight illumination; the receiving means 8 are arranged to receive the speckle structured light and the uniform light reflected from the object at different moments in time.

In the imaging device, when an object (such as a human face) or an area needs to be 3D photographed in a dark environment, the object or the area may be used as a target, the structured light generator 7 projects speckle on the target, and the receiving device 8 receives speckle structured light reflected by the surface of the target; the structured light generator 7 projects uniform light onto the target and forms flood illumination, and the receiving device 8 continues to receive the uniform light reflected back through the target surface.

The embodiment of the utility model provides an imaging device is owing to used more frivolous structured light generater 7, make this imaging device itself can directly combine two kinds of functions in an organic whole, for example at face identification's in-process, this imaging device can be through launching even light and realizing floodlight illumination, with be used for discerning people's face leading particulars (such as eyes, mouth etc.), and this imaging device can also be through the speckle structured light of throwing, with be used for further acquireing more accurate degree of depth information, and can make frivolous and miniaturization more, and then can reduce installation space, make imaging device's whole weight descend, can be applicable to the very harsh light sensing terminal to the space requirement, for example super frivolous high-screen accounts for than cell-phone, AR/VR equipment etc..

Optionally, the imaging device further comprises: and the camera device 9 is used for acquiring a color image of the target by the camera device 9.

The imaging device may further include a camera device 9, which may be used in a mobile terminal device equipped with the imaging device, as shown in fig. 5 or fig. 6. When a target needs to be subjected to 3D shooting in a dark environment (for example, a 3D image of the target needs to be acquired and the 3D image is beautified), the image of the target can be captured by the image capturing device 9 and can be displayed on a display screen of the mobile terminal, and further can be called by an application program inside the mobile terminal to perform image repairing or recognition and the like on the image of the target acquired by the image capturing device 9.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the technical solutions of the changes or replacements within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A structured light generator, comprising: the light source comprises a first light source (1), a second light source (2), a first super lens area (3) and a second super lens area (4), wherein the light emitting directions of the first light source (1) and the second light source (2) are consistent, and the first super lens area (3) and the second super lens area (4) are side-by-side super lens areas;

the first super lens area (3) is positioned on the light emitting side of the first light source (1) and corresponds to the first super lens area, and the first super lens area (3) can project light emitted by the first light source (1) into speckles;

the second super lens area (4) is located on the light emitting side of the second light source (2) and corresponds to the second light source, and the second super lens area (4) is used for uniformly projecting the light emitted by the second light source (2) and forming floodlight illumination.

2. The structured light generator according to claim 1, characterized in that the first superlens area (3) and the second superlens area (4) are different areas of one and the same superlens.

3. A structured light generator according to claim 1, characterized in that the first light source (1) and the second light source (2) are independently controlled light sources and are illuminated alternately.

4. The structured light generator according to claim 1, wherein the first superlens region (3) is further configured to collimate light emitted by the first light source (1).

5. The structured light generator according to claim 1, characterized in that the light emitted by the first light source (1) and the second light source (2) is infrared light.

6. A structured light generator as claimed in claim 1, characterized in that the first light source (1) comprises one or more vertical cavity lasers;

the second light source (2) comprises one or more vertical cavity lasers or one or more light emitting diodes.

7. The structured light generator according to claim 6, wherein, in case the first light source (1) comprises a plurality of vertical cavity lasers, the plurality of vertical cavity lasers are randomly arranged.

8. The structured light generator according to claim 1, wherein the first superlens region (3) comprises: a first super-surface nanostructure (31) and a filling material (32) filled around the first super-surface nanostructure (31);

the first super-surface nano structure (31) is used for modulating light rays emitted by the first light source (1) into speckle structure light;

the filling material (32) filled around the first super-surface nano-structure (31) is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material (32) and the refractive index of the first super-surface nano-structure (31) is greater than or equal to 0.5;

the second superlens region (4) comprises: a second super-surface nanostructure and a filling material filled around the second super-surface nanostructure;

the second super-surface nano structure is used for uniformly modulating the light emitted by the second light source (2) and forming floodlight;

the filling material filled around the second super-surface nano structure is a transparent or semitransparent material in an operating waveband, and the absolute value of the difference between the refractive index of the filling material and the refractive index of the second super-surface nano structure is greater than or equal to 0.5.

9. An image forming apparatus, comprising: a structured light generator (7) according to any of the claims 1 to 8 and receiving means (8);

the structured light generator (7) is used for projecting speckle structure light to a target and for uniformly projecting light to the target and forming floodlight;

the receiving device (8) is used for receiving the speckle structure light and the uniform light reflected from the target at different moments.

10. The imaging apparatus of claim 9, further comprising: a camera device (9), the camera device (9) being used for capturing an image of the target.

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