WO2021142610A1

WO2021142610A1 - Microlens array, lens array, tof transmitting module, and electronic device having same

Info

Publication number: WO2021142610A1
Application number: PCT/CN2020/071958
Authority: WO
Inventors: 陈冠宏; 李宗政
Original assignee: 南昌欧菲生物识别技术有限公司
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2021-07-22

Abstract

A microlens array (100), comprising at least one basic lens (10) and at least one anamorphic lens (20). The basic lens (10) is constructed as a rectangular lens, and a plurality of anamorphic lenses (20) each perform zoom-in or zoom-out in proportion to the basic lens (10). The basic lens (10) and the anamorphic lens (20) are arranged in a non-periodic manner to form the microlens array (100) having a rectangular contour. The microlens array (100) is convenient to arrange and simple to manufacture, can effectively solve the problem of ghosting, and has a good optical effect.

Description

Micro lens array, lens array, TOF emission module and electronic equipment with the same

Technical field

The present disclosure relates to the field of optics, and in particular, to a microlens array, a lens array, and a TOF emission module and electronic equipment having the microlens array.

Background technique

The TOF (Time of Flight) emitting device in the related technology is composed of a VCSEL (vertical cavity surface emitting laser) plus an optical diffuser. The microstructure of the optical diffuser can be used to refract the laser energy emitted by the VCSEL and project A variety of light field distributions. At present, the main design scheme of the optical microstructure of the optical diffuser is a microlens array, which mainly arranges the lenses into a neat array.

When the microlens is made, the units are usually arranged in an orderly array. However, in actual work, the light field projected by such a microlens product will have a double shadow fringe phenomenon. The main cause is that the VCSEL light-emitting points are also distributed in an array, so the cycle of the VCSEL array and the microlens array appears to resonate. , There will be a strong optical energy distribution in some positions, resulting in a double shadow phenomenon.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art. For this reason, the present disclosure proposes a microlens array, which can effectively solve the problem of ghosting.

The present disclosure also proposes a lens array including the micro lens array.

The present disclosure also proposes a TOF emission module with the micro lens array or the lens series.

The present disclosure also proposes an electronic device including the TOF transmitting module.

A micro lens array according to an embodiment of the first aspect of the present disclosure includes: at least one basic lens configured as a rectangular lens; at least one anamorphic lens, and a plurality of the anamorphic lenses are respectively opposed to the basic lens Zoom in or zoom out in equal proportion; the basic lens and the anamorphic lens are arranged aperiodically to form the micro lens array with a rectangular outer contour.

According to the microlens array of the embodiments of the present disclosure, through the aperiodic and random combination of at least two lenses of the same proportion but different sizes, the existing optical performance can be effectively solved in a simple manner without affecting the optical performance. The double shadow problem caused by the micro lens array.

According to some examples of the present disclosure, the ratio of the length L to the width W of the basic lens is 4:3. The basic lens of this size ratio is easier to arrange, so that the imaging effect is better.

According to some examples of the present disclosure, when the basic lens and the anamorphic lens are arranged, the edges of any two adjacent lenses are arranged to coincide. In this way, only the edges overlap and the actual imaging part of the lens does not overlap, and there is no gap between adjacent lenses. Therefore, the complete and effective optical aperture of the lens is ensured, and the loss of the field of view (FOV) of the illuminated area is avoided. The microlens array of the embodiment of the present disclosure has simple and convenient design and strong optical stability.

According to some examples of the present disclosure, the reduction ratio of each anamorphic lens relative to the basic lens is: 1/4, 1/3, 1/2, 2/3, or 3/4. According to other embodiments of the present disclosure, the magnification ratio of each anamorphic lens relative to the basic lens is: 4/1, 3/1, 2/1, 3/2, or 4/3. The anamorphic lens with enlarged or reduced ratio is arranged in this way, which is convenient for arrangement with the basic lens, is simple to manufacture, and can achieve better optical stability.

According to some examples of the present disclosure, the anamorphic lens includes m first lenses and n second lenses;

The microlens array is configured as follows: in an s*t array arranged in a unit of area, u first array areas, v second array areas, and y third array areas are divided, wherein The size of the area unit is the same as the smallest one of the first lens, the second lens, and the basic lens,

Wherein, the first lens is arranged in the first array area, the second lens is arranged in the second array area, and the basic lens is arranged in the third array area, wherein any two of the first arrays The overlapping length of the edges between the regions is less than or equal to the edge length of the first array region; the overlapping length of the edges between any two second array regions is less than or equal to the edge length of the second array region;

Among them, m, n, s, t, u, v, and y are integers greater than or equal to 0. The microlens array set up in this way is simple to set up and has good optical effects.

According to the microlens array of the embodiment of the present disclosure, through such an arrangement, without affecting the optical performance, it can effectively solve the overlap problem caused by the existing microlens array in a simple manner, and the design is Optimization is simple.

According to some examples of the present disclosure, the m is an integer greater than or equal to 1, and n=0, the first lens is reduced by 1/2 in proportion to the basic lens; the size of the area unit is the same as that of the first lens, The microlens array is configured in the following arrangement:

In the s*t array with the area unit as the arrangement unit, a plurality of first array areas are selected to be set as basic lenses, the first array area is a 2*2 array area, and any two of the first array areas are The overlapping length between the edges is less than or equal to the side length of the second lens extending along the edge direction. Through the micro lens array specifically arranged in this way, the arrangement is convenient and the manufacturing is simple, can effectively solve the problem of double-image, and has a good optical effect.

Optionally, the s and t are both 5, and the first array area includes four.

According to some examples of the present disclosure, the m and n are integers greater than or equal to 1, the first lens is proportionally reduced by 2/3 relative to the basic lens, and the second lens is proportionally reduced by 1/3 relative to the basic lens; the area The unit is the same size as the second lens, and the micro lens array is configured as follows:

In the s*t array arranged in area units, u first array areas are selected as the first lens, where the first array area is a 2*2 array area, and v second array areas are selected as the basic lens. The second array area is a 3*3 array area, u and v are integers greater than or equal to 1, wherein the edge overlap length between any two first array areas is less than or equal to the edge length of the first array area; The overlapping length of the edges between any two second array regions is less than or equal to the edge length of the second array regions. Through the micro lens array specifically arranged in this way, the arrangement is convenient and the manufacturing is simple, can effectively solve the problem of double-image, and has a good optical effect.

In some optional examples, s=12, t=10, u=11, and v=6. In other optional examples, s=12, t=10, u=14, and v=5.

A lens array according to an embodiment of the second aspect of the present disclosure includes a plurality of microlens arrays according to the embodiment of the first aspect of the present disclosure, and the plurality of microlens arrays are arranged aperiodically to form a rectangular shape. The outer contour of the lens array.

According to some examples of the present disclosure, the lens array is arranged in the following manner: S1, any of 1/a, 2/a,..., (a-1/a) is selected from the length or width direction of the lens array At least one obtains a partial lens, a is an integer;

S2. Repeat the above step S1, wherein a uses different values to obtain a plurality of the partial lenses;

S3. At least one partial lens and at least one microlens array are arranged and combined in a length direction and a width direction to form the lens array with a rectangular outer contour.

Through such an arrangement, under the premise of not affecting the optical performance, the overlap problem caused by the existing micro lens array can be effectively solved in a simple manner, and the design optimization is simple.

A TOF emission module according to an embodiment of the third aspect of the present disclosure includes: the microlens array according to the embodiment of the first aspect of the present disclosure or the microlens array according to the embodiment of the second aspect of the present disclosure; a laser transmitter, The laser transmitter is arranged corresponding to the micro lens array to refract the laser energy emitted by the laser transmitter through the micro lens array.

According to the TOF transmitter module of the embodiment of the present disclosure, since the randomly arranged microlens array is used as the optical diffuser, after the laser energy emitted by the laser transmitter is refracted by the microlens array, the projected light field does not appear to overlap. Streak phenomenon, the optical effect is better.

According to some examples of the present disclosure, the lenses in the microlens array are all convex or concave lenses, and the laser transmitter is arranged on the convex or concave side of the lens. In this way, the laser energy is refracted and projected to obtain a better imaging effect.

An electronic device according to an embodiment of the fourth aspect of the present disclosure includes a TOF transmitting module according to an embodiment of the third aspect of the present disclosure.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1a is a simple schematic diagram of the arrangement of a microlens array according to an embodiment of the present disclosure;

Fig. 1b is a schematic diagram of the arrangement array of the area units of the microlens array in Fig. 1a;

Fig. 2 is a view of a microlens array according to a first specific embodiment of the present disclosure;

Fig. 3 is a view of a microlens array according to a second specific embodiment of the present disclosure;

Fig. 4 is a view of a microlens array according to a third specific embodiment of the present disclosure;

Fig. 5 is an exploded schematic diagram of a lens array according to an embodiment of the present disclosure.

Reference signs:

Micro lens array 100, basic lens 10; anamorphic lens 20;

Area unit A; first array area B1; second array area B2;

First embodiment: basic lens 110; first lens 121;

The second embodiment: the basic lens 210; the first lens is 221; the second lens is 222;

The third embodiment: the basic lens 310; the first lens is 321; the second lens is 322;

Lens array 1000

Detailed ways

The embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present disclosure, and cannot be understood as a limitation to the present disclosure.

In the description of the present disclosure, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying The device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

It should be noted that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. Further, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

Hereinafter, a microlens array according to an embodiment of the present disclosure will be described with reference to FIGS. 1-4.

A micro lens array 100 according to an embodiment of the present disclosure includes: at least one basic lens 10 and at least one anamorphic lens 20.

As shown in FIG. 1, the basic lens 10 is configured as a rectangular lens, and a plurality of anamorphic lenses 20 are respectively enlarged or reduced in equal proportions with respect to the basic lens 10. The basic lens 10 and the anamorphic lens 20 are arranged aperiodically to form a microlens array 100 having a rectangular outer contour.

The above-mentioned "non-periodical arrangement" refers to the arrangement in a random manner to fill a specific rectangular area, avoiding periodic arrangement of lenses of the same size, so as to make various Lenses of different sizes are arranged randomly in a certain area. In other words, under this non-periodical arrangement, rectangular lenses of various sizes can have a certain probability of use, and the ratios of appearance are not exactly the same.

Therefore, in order to form a certain area, various lenses have various splicing possibilities. However, since the various optical parameters of each lens are the same, and the size parameters such as the aspect ratio are scaled proportionally, a similar light refraction function can be achieved. Therefore, the light field projected by each lens is also close to the same, that is to say, When in use, since each lens has a similar optical performance, the entire microlens array avoids overlapping images and achieves design optimization without any influence on the optical performance.

According to the microlens array of the embodiment of the present disclosure, through the aperiodic and random combination of at least two lenses of the same proportion but different sizes, the existing optical performance can be effectively solved in a simple manner without affecting the optical performance. The double shadow problem caused by the micro lens array.

According to some embodiments of the present disclosure, the ratio of the length L to the width W of the basic lens is 4:3. The basic lens of this size ratio is easier to arrange. Of course, the present disclosure is not limited to this. Based on the ease of arrangement and the ability to solve the problem of double-image, the basic lens can also be set to shapes of other size ratios, such as 1:1, 3:2, etc.

As shown in FIGS. 1-5, according to some embodiments of the present disclosure, when the basic lens and the anamorphic lens are arranged, the edges of every two adjacent lenses overlap each other. In this way, only the edges overlap and the actual imaging part of the lens does not overlap, and there is no gap between adjacent lenses. Therefore, the complete and effective optical aperture of the lens is ensured, and the loss of the field of view (FOV) of the illuminated area is avoided. The microlens array of the embodiment of the present disclosure has simple and convenient design and strong optical stability.

According to some embodiments of the present disclosure, the reduction ratio of each anamorphic lens 20 relative to the basic lens 10 is: 1/4, 1/3, 1/2, 2/3, or 3/4. Of course, the present disclosure is not limited to this, and the magnification ratio of each anamorphic lens 20 relative to the basic lens 10 may also be: 4/1, 3/1, 2/1, 3/2, or 4/3. Those skilled in the art should understand that in the same specific area of the microlens array, there are no restrictions on the types and sizes of various anamorphic lenses, as long as the edges of the lenses are overlapped, and random combinations of the same proportions but different sizes can be guaranteed. Can. The anamorphic lens with enlarged or reduced ratio is arranged in this way, which is convenient for arrangement with the basic lens, is simple to manufacture, and can achieve better optical stability.

As shown in FIGS. 1-4, according to the micro lens array of some embodiments of the present disclosure, the anamorphic lens 20 may include at least m first lenses 21 and n second lenses 22;

The microlens array 100 is configured to be arranged as follows:

In the s*t array arranged in one area unit A, u first array areas, v second array areas, and y third array areas are divided. The size of the area unit A is the same as that of the first lens 21 and the second lens 21. The lens 22 and the smallest one of the basic lens 10 are the same,

The first lens 21 is provided in the first array area B1, the second lens 22 is provided in the second array area B2, and the basic lens 10 is provided in the third array area B3.

The overlapping length of the edges between any two first array areas B1 is less than or equal to the edge length of the first array area B1; the overlapping lengths between any two second array areas B2 are less than or equal to the edge length of the second array area B2 . Among them, m, n, s, t, u, v, and y are integers greater than or equal to 0.

The microlens array according to the embodiment of the present disclosure is simple to set up and has good optical effects.

In the above design, when m or n is 0, it means that only the first lens 21 or the second lens 22 exists in the anamorphic lens. Then in the entire microlens array, there are at least two types of lenses, that is, the basic lens 10, The first lens or the second lens. When both m and n are not 0, it means that there are at least two anamorphic lenses 21. In the entire microlens array, there are at least three types of lenses. Those skilled in the art can understand that the first lens 21 here may only represent one kind of lens, of course, it may also include two or more lenses of different sizes, which is not limited here; the second lens 22 should also do the same. understand.

Hereinafter, the above arrangement will be briefly explained by taking Fig. 1a-Fig. 1b as an example. 3 types of lenses are shown in FIG. 1a, in which the first lens 21 is scaled down by 1/2 relative to the basic lens 10, and the second lens 22 is scaled up by 3/2 times relative to the basic lens. In this way, the first lens 21 is the lens with the smallest size among the three lenses, that is, the area unit A.

As shown in Figure 1b, the first lens 21 (area unit A) is arranged in a 5*3 array, a first array area B1 (four unit areas on the upper left) is selected as the basic lens 10, and the second array is selected The area B2 (six unit areas on the right) is set as the second lens 22 to obtain the micro lens array of FIG. 1a.

In the arrangement of the embodiments of the present disclosure, if there are multiple first array regions B1, the overlapping length of the edges between any two first array regions B1 should be less than the edge length of the first array region B1, as The area marked 121 in Figure 2. Similarly, if there are multiple second array areas B2, the overlapping length of the edges between any two second array areas B2 should be less than the edge length of the second array area B2.

The microlens array according to various embodiments of the present disclosure will be described below with reference to FIGS. 1-5.

Example one,

As shown in FIG. 2, in this embodiment, the basic lens is marked as 110, and the first lens is marked as 121. In the embodiment shown in FIG. 2, both s and t are selected as 5, m is an integer greater than or equal to 1, n=0, and the first lens 21 is reduced by 1/2 relative to the basic lens 10 in equal proportion. The area unit A has the same size as the first lens 21.

The microlens array 100 is configured to be arranged as follows:

In the 5*5 array with the area unit A as the arrangement unit, a plurality of first array areas B1 are selected as the basic lens 10, and the first array area B1 is a 2*2 array area, of which any two first array areas B1 The overlapping length between the edges is less than or equal to the side length of the second lens 22 extending along the edge direction. Specifically, as shown in FIG. 2, in the length direction, the overlapping length of the edges between the two first array regions B1 is less than or equal to the length of the first array region B1. When the edge overlapping length is 0, the two first array regions B1 An array area B1 does not overlap at all in the length direction. In the width direction, the overlapping length of the edges between the two first array regions B1 is less than or equal to the width of the first array region B1. When the edge overlapping length is 0, the two first array regions B1 are It doesn't overlap at all.

Through the micro lens array specifically arranged in this way, the arrangement is convenient and the manufacturing is simple, can effectively solve the problem of double-image, and has a good optical effect.

Of course, in the embodiment of FIG. 2, only an example of four first array regions in a 5*5 array is shown. However, those skilled in the art should understand that in a 5*5 array, other settings The method can set three or five, or even other numbers of first array areas, which will not be shown here. In addition, it is worth noting that FIG. 2 shows an optional embodiment of the basic lens 210 and an anamorphic lens 20, that is, the first lens 21. In this embodiment, the size of the first lens 21 is basically 1/2 of the lens, but based on the above arrangement, those skilled in the art can also use other arrangements not shown in the figure for the two sizes of lenses, which will not be shown one by one here.

Example two,

According to some embodiments of the present disclosure, m and n are integers greater than or equal to 1, the first lens 21 is proportionally reduced by 2/3 relative to the basic lens 10, and the second lens 22 is proportionally reduced by 1/3 relative to the basic lens 10;

The area unit A has the same size as the second lens 22, and the micro lens array 100 is configured to be arranged as follows:

In the s*t array arranged in the area unit A, u first array areas B1 are selected to be set as the first lens 21, wherein the first array area B1 is a 2*2 array area, and v second array areas B2 are selected Set as the basic lens 10, where the second array area B2 is a 3*3 array area, u and v are integers greater than or equal to 1, and the rest are the third array area B3, which is set as the second lens 322, which is the area unit Waiting for a large area.

The overlapping length of the edges between any two first array areas B1 is less than or equal to the edge length of the first array area B1; the overlapping lengths between any two second array areas B2 are less than or equal to the edge length of the second array area B2 .

In a specific embodiment as shown in FIG. 3, the basic lens is marked as 210, the first lens is marked as 221, and the second lens is marked as 222.

As shown in FIG. 3, the area unit A and the second lens 222 have the same size, and the second lens 222 is used as an array for a 12*10 arrangement. Eleven first array areas B1 are selected and set as the first lens 221. Six second array regions B2 are provided as basic lenses 210. Wherein, it can be seen from FIG. 3 that the overlapping length of the edges of any two first array areas B1 is less than or equal to the corresponding edge length of the first array area B1, and when the edge overlapping lengths are less than 0, it indicates that the two first array areas B1 Do not coincide in this direction. For example, in the length direction, the overlapping length between the two first array regions B1 will not exceed its length, even if the overlapping length is 0, it does not overlap at all, such as the two first array regions on the far left and right. B1; The same is understood in the width direction, that is, even if there is an overlap between the two first array regions B1, the overlap length will not exceed its width. Correspondingly, the overlapping length of the edges of any two second array regions B2 is less than or equal to the edge length of the second array region B2.

Example three,

In another specific embodiment of FIG. 4, the basic lens is labeled 310, the first lens is labeled 321, and the second lens is labeled 322. The difference between this embodiment and the above-mentioned embodiment in FIG. 3 is that 14 first array regions B1 are selected as the first lens 321, 5 second array regions B2 are selected as the basic lens 310, and the rest are the third array The area B3 is set as the second lens 322.

A lens array 1000 according to an embodiment of the second aspect of the present disclosure includes the microlens array 100 according to the embodiment of the first aspect of the present disclosure, and a plurality of microlens arrays 100 are arranged aperiodically to form a rectangular outer contour. The lens array 1000.

In some embodiments of the present disclosure, the lens array may be arranged in the following manner: any at least one of 1/a, 2/a, ..., (a-1/a) is selected from the lens array to obtain a partial lens, Where a is an integer; repeat the above step S1, where a uses different values to obtain a plurality of the partial lenses; at least one partial lens and at least one lens array are arranged and combined in the length direction and the width direction to form a rectangular outer contour Lens array. Through such an arrangement, under the premise of not affecting the optical performance, the overlap problem caused by the existing micro lens array can be effectively solved in a simple manner, and the design optimization is simple.

In the specific embodiment shown in FIG. 5, the lens array 1000 includes a plurality of micro lens arrays 100 as shown in FIG. 2. The arrangement is as follows: 1/4 and 3/4 are selected from the microlens array 100 as the first partial lens 101 and the second partial lens 102, and 2/5 and 3/5 are selected as the third partial lens 103 and the fourth partial lens. Part of the lens 104, and the two microlens arrays 100 are arranged in a first column along their length, the first part of the lens 101 and the second part of the lens 102 are arranged in a second column along the length of the lens, the third part of the lens 103 and the first The four-part lens 104 is arranged in a third column along its length direction, and then the first column, the second column, and the third column are arranged in sequence according to the width direction of the microlens array.

Of course, FIG. 5 only provides an example of the arrangement. It should be understood by those skilled in the art that any method can be selected to select and arrange the microlens array 100 and form the lens array 1000 according to the above arrangement. Within the protection scope of this disclosure.

A TOF emission module according to an embodiment of the third aspect of the present disclosure includes: a microlens array 100 according to an embodiment of the first aspect of the present disclosure and a laser transmitter, the laser transmitter is corresponding to the microlens array 100 to emit the laser transmitter The laser energy is refracted by the microlens array 100.

According to some embodiments of the present disclosure, the lenses in the microlens array 100 are all convex or concave lenses, and the laser transmitter is arranged on the convex or concave side of the lens. In this way, the laser energy is refracted and projected to obtain a better imaging effect. Other configurations and operations of the TOF transmitting module according to the embodiments of the present disclosure are known to those of ordinary skill in the art, and will not be described in detail here.

An electronic device according to an embodiment of the fourth aspect of the present disclosure includes a TOF transmitting module according to the embodiment of the third aspect of the present disclosure.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. means to incorporate the implementation The specific features, structures, materials or characteristics described by the examples or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and modifications can be made to these embodiments without departing from the principle and purpose of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

A micro lens array, characterized in that it comprises:

At least one basic lens configured as a rectangular lens;

At least one anamorphic lens, and a plurality of the anamorphic lenses are respectively enlarged or reduced in equal proportions with respect to the basic lens;

The basic lens and the anamorphic lens are arranged aperiodically to form the micro lens array having a rectangular outer contour.
The micro lens array according to claim 1, wherein the ratio of the length L to the width W of the basic lens is 4:3.
The micro lens array according to claim 1, wherein when the basic lens and the anamorphic lens are arranged, the edges of any two adjacent lenses are arranged to coincide.
The microlens array according to any one of claims 1 to 3, wherein the reduction ratio of each anamorphic lens relative to the basic lens is: 1/4, 1/3, 1/2, 2/ 3. Or 3/4.
The microlens array according to any one of claims 1 to 3, wherein the magnification ratio of each anamorphic lens relative to the basic lens is: 4/1, 3/1, 2/1, 3/ 2. Or 4/3.
The micro lens array according to claim 1, wherein the anamorphic lens comprises m first lenses and n second lenses;

The microlens array is configured as follows: in an s*t array arranged in a unit of area, u first array areas, v second array areas, and y third array areas are divided, wherein The size of the area unit is the same as the smallest one of the first lens, the second lens, and the basic lens,

Wherein, the first lens is arranged in the first array area, the second lens is arranged in the second array area, and the basic lens is arranged in the third array area, wherein any two of the first arrays The overlapping length of the edges between the regions is less than or equal to the edge length of the first array region; the overlapping length of the edges between any two second array regions is less than or equal to the edge length of the second array region;

Among them, m, n, s, t, u, v, and y are integers greater than or equal to zero.
7. The microlens array according to claim 6, wherein the m is an integer greater than or equal to 1, n=0, and the first lens is reduced by 1/2 in proportion to the basic lens;

The area unit has the same size as the first lens, and the micro lens array is configured to be arranged as follows:

In the s*t array with the area unit as the arrangement unit, a plurality of first array areas are selected to be set as basic lenses, the first array area is a 2*2 array area, and any two of the first array areas are The overlapping length between the edges is less than or equal to the side length of the second lens extending along the edge direction.
8. The microlens array according to claim 7, wherein the s and t are both 5, and the first array area includes four.
The microlens array according to claim 6, wherein the m and n are integers greater than or equal to 1, the first lens is proportionally reduced by 2/3 relative to the basic lens, and the second lens is proportional to the basic lens. Reduce by 1/3;

The area unit and the second lens have the same size, and the micro lens array is configured to be arranged as follows:

In the s*t array arranged in area units, u first array areas are selected as the first lens, where the first array area is a 2*2 array area, and v second array areas are selected as the basic lens. The second array area is a 3*3 array area, u and v are integers greater than or equal to 1,

Wherein the edge overlap length between any two first array areas is less than or equal to the edge length of the first array area; the edge overlap length between any two second array areas is less than or equal to the second array area The edge length.
The microlens array according to claim 9, wherein the s=12, t=10, u=11, v=6.
The micro lens array according to claim 9, wherein the s=12, t=10, u=14, and v=5.
A lens array, characterized by comprising a plurality of micro lens arrays according to any one of claims 1-11, and the plurality of micro lens arrays are arranged aperiodically to form a rectangular outer contour The lens array.
The lens array according to claim 12, wherein the lens array is arranged in the following manner:

S1. Select any at least one of 1/a, 2/a, ..., (a-1/a) from the length or width direction of the lens array to obtain a partial lens, and a is an integer;

S2. Repeat the above step S1, wherein a uses different values to obtain a plurality of the partial lenses;

S3. At least one partial lens and at least one microlens array are arranged and combined in a length direction and a width direction to form the lens array with a rectangular outer contour.
A TOF transmitting module is characterized in that it comprises:

The microlens array according to any one of claims 1-11 or the lens series according to any one of claims 12-13;

A laser transmitter, the laser transmitter is arranged corresponding to the micro lens array to refract the laser energy emitted by the laser transmitter through the micro lens array.
The TOF emission module according to claim 14, wherein the lenses in the microlens array are all convex or concave lenses, and the laser transmitter is arranged on the convex or concave side of the lens.
An electronic device, characterized by comprising the TOF transmitting module according to claim 14 or 15.