CN113189682A - Microlens array, lens array, TOF emission module, and electronic apparatus having the same - Google Patents
Microlens array, lens array, TOF emission module, and electronic apparatus having the same Download PDFInfo
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Abstract
The invention discloses a microlens array, a lens array, a TOF emission module with the same and electronic equipment with the same. The microlens array includes: at least one base lens configured as a rectangular lens; at least one anamorphic lens, a plurality of which are respectively enlarged or reduced in equal proportion to the base lens; the base lens and the anamorphic lens are arranged aperiodically to form the microlens array having a rectangular outer profile. According to the micro lens array provided by the embodiment of the invention, the problem of ghost shadow caused by the existing micro lens array can be effectively solved in a simple manner on the premise of not influencing optical performance through the non-periodic and random combination of at least two lenses with the same proportion but different sizes.
Description
Technical Field
The present invention relates to the field of optics, and in particular to a microlens array, a lens array, and a TOF transmitting module and an electronic device having the microlens array.
Background
In the related art, a TOF (Time of Flight) emitting device is formed by a VCSEL (vertical cavity surface emitting laser) and an optical diffuser, and a microstructure of the optical diffuser can be used to refract laser energy emitted by the VCSEL to project various optical field distributions. The optical microstructure of the existing optical diffusion sheet mainly adopts a design scheme of a micro-lens array, and the lenses are mainly arranged into a regular array.
When the microlens is manufactured, the units are usually arranged in an orderly array. However, in actual operation, the light field projected by such microlens products will have a fringe phenomenon of ghost, which is mainly caused by the fact that the VCSEL light emitting points are also distributed in an array, so that the period of the VCSEL array and the microlens array has a resonance phenomenon, and there will be a strong optical energy distribution in some positions, thereby causing the ghost phenomenon.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a micro lens array which can effectively solve the problem of ghost shadow.
The invention also provides a lens array comprising the micro lens array.
The invention also proposes a TOF transmitting module with said microlens array or said series of lenses.
The invention also provides electronic equipment comprising the TOF emission module.
A microlens array according to an embodiment of a first aspect of the invention includes: at least one base lens configured as a rectangular lens; at least one anamorphic lens, a plurality of which are respectively enlarged or reduced in equal proportion to the base lens; the base lens and the anamorphic lens are arranged aperiodically to form the microlens array having a rectangular outer profile.
According to the micro lens array provided by the embodiment of the invention, the problem of ghost shadow caused by the existing micro lens array can be effectively solved in a simple manner on the premise of not influencing optical performance through the non-periodic and random combination of at least two lenses with the same proportion but different sizes.
According to some embodiments of the invention, the ratio between the length L and the width W of the elementary lens is 4: 3. the basic lenses with the size proportion are easy to arrange, and therefore the imaging effect is better.
According to some embodiments of the invention, the base lens and the anamorphic lens are arranged such that the edges of any two adjacent lenses are coincident. Therefore, only the edges are overlapped, the actual imaging parts of the lenses are not overlapped, and no gap is formed between the adjacent lenses, so that the complete effective light aperture of the lenses is ensured, and the loss of the field of view (FOV) of an illumination area is avoided.
According to some embodiments of the invention, each of the anamorphic lenses is demagnified relative to the base lens in the ratio: 1/4, 1/3, 1/2, 2/3, or 3/4. According to further embodiments of the present invention, the ratio of each said anamorphic lens to the base lens magnification is: 4/1, 3/1, 2/1, 3/2, or 4/3. The anamorphic lens which is enlarged or reduced in proportion is arranged conveniently with the basic lens, is simple to manufacture, and can realize better optical stability.
According to some embodiments of the invention, the anamorphic lens comprises m first lenses, n second lenses;
the microlens array is configured to be arranged as follows: dividing u first array regions, v second array regions, and y third array regions in an s x t array arranged by a region unit, wherein the size of the region unit is the same as the smallest one of the first lens, the second lens, and the basic lens,
wherein the first lenses are arranged in the first array region, the second lenses are arranged in the second array region, and the basic lenses are arranged in the third array region, wherein the edge coincidence length between any two first array regions is less than or equal to the edge length of the first array regions; the edge coincidence length between any two second array regions is less than or equal to the edge length of the second array regions;
wherein m, n, s, t, u, v and y are integers not less than 0. The micro-lens array arranged in this way is simple to arrange and has good optical effect.
According to the micro lens array provided by the embodiment of the invention, by the arrangement mode, the problem of ghost shadow caused by the existing micro lens array can be effectively solved in a simple mode on the premise of not influencing optical performance, and the design optimization is simple.
According to some embodiments of the invention, m is an integer greater than or equal to 1, n is 0, the first lens is proportionally reduced 1/2 with respect to the base lens; the area unit is the same size as the first lens, and the microlens array is configured to be arranged as follows:
in the s-t array taking the area units as the arrangement units, a plurality of first array areas are selected to be set as basic lenses, the first array areas are 2-2 array areas, and the edge overlapping length between any two first array areas is smaller than or equal to the side length of the second lens extending along the edge direction. Through the microlens array of this concrete setting, arrange the convenience and make simply, can effectively solve the ghost problem, optical effect is good.
Optionally, s and t are both 5, and the first array area includes four.
According to some embodiments of the invention, m, n are integers greater than or equal to 1, the first lens is equi-scaled down 2/3 with respect to the base lens, the second lens is equi-scaled down 1/3 with respect to the base lens; the area unit is the same size as the second lens, and the microlens array is configured to be arranged as follows:
in an s-t array arranged by using area units, selecting u first array areas as first lenses, wherein the first array areas are 2-2 array areas, selecting v second array areas as basic lenses, the second array areas are 3-3 array areas, u and v are integers greater than or equal to 1, and the edge coincidence length between any two first array areas is less than or equal to the edge length of the first array areas; the edge coincidence length between any two second array regions is less than or equal to the edge length of the second array regions. Through the microlens array of this concrete setting, arrange the convenience and make simply, can effectively solve the ghost problem, optical effect is good.
In some alternative examples, s-12, t-10, u-11, and v-6. In other alternative examples, s-12, t-10, u-14, and v-5.
A lens array according to an embodiment of the second aspect of the present invention includes a plurality of the microlens arrays according to the embodiment of the first aspect of the present invention, and the plurality of the microlens arrays are arranged without periodicity to form the lens array having a rectangular outer contour.
According to some embodiments of the invention, the lens array is arranged as follows: s1, selecting any at least one of 1/a, 2/a, … … and (a-1/a) from the length direction or the width direction of the lens array to obtain a partial lens, wherein a is an integer;
s2, repeating the above step S1, wherein a takes different values to obtain a plurality of said partial lenses;
s3, arranging and combining at least one partial lens and at least one micro lens array in the length direction and the width direction to form the lens array with a rectangular outer contour.
By the arrangement mode, the problem of ghost shadow caused by the existing micro-lens array can be effectively solved in a simple mode on the premise of not influencing optical performance, and the design optimization is simple.
A TOF transmitting module according to an embodiment of the third aspect of the invention, comprising: a microlens array according to an embodiment of the first aspect of the invention or according to an embodiment of the second aspect of the invention; the laser emitter is arranged corresponding to the micro lens array so as to refract laser energy emitted by the laser emitter out through the micro lens array.
According to the TOF emission module provided by the embodiment of the invention, the micro lens array which is randomly arranged is used as the optical diffusion sheet, and after laser energy emitted by the laser emitter is refracted by the micro lens array, the projected light field does not have the fringe phenomenon of ghost, so that the optical effect is better.
According to some embodiments of the invention, the lenses of the microlens array are both convex or concave lenses, and the laser emitter is disposed on the convex or concave side of the lenses. Thus, the imaging effect obtained by refracting and projecting the laser energy is better.
An electronic device according to a fourth aspect embodiment of the invention comprises a TOF transmitting module according to the third aspect embodiment of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1a is a simplified schematic diagram of a microlens array arrangement according to one embodiment of the present invention;
FIG. 1b is a schematic diagram of an array of the area units of the microlens array of FIG. 1 a;
FIG. 2 is a view of a microlens array according to a first embodiment of the present invention;
FIG. 3 is a view of a microlens array according to a second embodiment of the present invention;
FIG. 4 is a view of a microlens array according to a third embodiment of the present invention;
fig. 5 is an exploded schematic view of a lens array according to an embodiment of the invention.
Reference numerals:
a microlens array 100, a base lens 10; an anamorphic lens 20;
a zone unit A; a first array region B1; a second array region B2;
the first embodiment: a base lens 110; a first lens 121;
second embodiment: a base lens 210; the first lens is 221; the second lens is 222;
the third embodiment: a base lens 310; the first lens is 321; the second lens element is 322;
Detailed Description
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
In the description of the present invention, it is to be understood that the terms "length", "width", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
A microlens array according to an embodiment of the present invention is described below with reference to fig. 1a to 4.
A microlens array 100 according to an embodiment of the present invention includes: at least one basic lens 10 and at least one anamorphic lens 20.
As shown in fig. 1a, the base lens 10 is configured as a rectangular lens, and the plurality of anamorphic lenses 20 are respectively enlarged or reduced in equal proportion to the base lens 10. The elemental lenses 10 and the anamorphic lenses 20 are arranged aperiodically to constitute a microlens array 100 having a rectangular outer profile.
The "non-periodic arrangement" refers to an arrangement mode in which lenses of the same size are arranged in a random manner to fill a specific rectangular area when the arrangement is planned, so that the lenses of various sizes are arranged in a random distribution manner in a specific area while avoiding the lenses of the same size being arranged in a periodic manner. That is, with such an aperiodic arrangement, rectangular lenses of various sizes can have a certain probability of use, and the occurrence rates are not exactly the same.
Thus, the various lenses have various different splicing possibilities in order to make up a particular region. However, since various optical parameters of each lens are the same and size parameters such as aspect ratio are scaled proportionally, similar light refraction function can be achieved, and therefore, light fields projected by each lens are also close to the same, that is, when the micro-lens array is used, because each lens has similar optical performance, the whole micro-lens array avoids ghost shadow under the condition that the optical performance is not affected at all, and design optimization is achieved.
According to the micro lens array provided by the embodiment of the invention, the problem of ghost shadow caused by the existing micro lens array can be effectively solved in a simple manner on the premise of not influencing optical performance through the non-periodic and random combination of at least two lenses with the same proportion but different sizes.
According to some embodiments of the invention, the ratio of the length L and the width W of the base lens is 4: 3. such a dimensional ratio of the basic lenses is easier to arrange. Of course, the present invention is not limited thereto. The basic lens can be set in other shapes with different size ratios, such as 1: 1. 3:2, etc.
As shown in fig. 1a-5, according to some embodiments of the present invention, the base lens and the anamorphic lens are arranged such that the edges of each adjacent two lenses are coincident. Therefore, only the edges are overlapped, the actual imaging parts of the lenses are not overlapped, and no gap is formed between the adjacent lenses, so that the complete effective light aperture of the lenses is ensured, and the loss of the field of view (FOV) of an illumination area is avoided.
According to some embodiments of the invention, each anamorphic lens 20 is demagnified relative to the base lens 10 in the proportions: 1/4, 1/3, 1/2, 2/3, or 3/4. Of course, the present invention is not limited thereto, and the magnification ratio of each anamorphic lens 20 with respect to the base lens 10 may also be: 4/1, 3/1, 2/1, 3/2, or 4/3. It should be understood by those skilled in the art that the kinds and sizes of the various anamorphic lenses in the microlens array of the same specific region are not limited, as long as the random combination of the coincident lens edges and the same proportion but different sizes can be ensured. The anamorphic lens which is enlarged or reduced in proportion is arranged conveniently with the basic lens, is simple to manufacture, and can realize better optical stability.
As shown in fig. 1a-4, according to the microlens array of some embodiments of the present invention, the anamorphic lens 20 may include at least m first lenses 21, n second lenses 22;
the microlens array 100 is configured to be arranged as follows:
in the s x t array arranged by one area unit A, u first array areas, v second array areas and y third array areas are divided, wherein the size of the area unit A is the same as the smallest one of the first lens 21, the second lens 22 and the basic lens 10,
wherein the first lenses 21 are disposed in the first array region B1, the second lenses 22 are disposed in the second array region B2, the elemental lenses 10 are disposed in the third array region B3,
wherein the edge overlap length between any two of the first array regions B1 is less than or equal to the edge length of the first array region B1; the edge coincidence length between any two second array regions B2 is equal to or less than the edge length of the second array region B2. Wherein m, n, s, t, u, v and y are integers not less than 0.
The micro-lens array provided by the embodiment of the invention is simple in arrangement and good in optical effect.
In the above-described design, when m or n is 0, it is described that the anamorphic lens has only the first lens 21 or the second lens 22, and then the lens types include at least two, that is, the base lens 10, the first lens, or the second lens, in the entire microlens array. When m and n are not both 0, it is indicated that there are at least two kinds of the anamorphic lenses 21, and the lens types include at least 3 kinds in the entire microlens array. It will be understood by those skilled in the art that the first lens 21 may represent only one lens, and may include more than two lenses with different sizes, which is not limited herein; the same should be understood for the second lens 22.
The above arrangement is briefly illustrated below by way of example in fig. 1 a-1 b. In fig. 1a, 3 lenses are shown, wherein the first lens 21 is scaled down 1/2 equally with respect to the base lens 10, and the second lens 22 is scaled up 3/2 times equally with respect to the base lens. Thus, the first lens 21 is the smallest size of the three lenses, i.e., the area unit a.
As shown in fig. 1B, 5 × 3 array arrangement is performed with the first lenses 21 (area unit a), one first array area B1 (four upper left unit areas) is selected to be the basic lens 10, and the second array area B2 (six right unit areas) is selected to be the second lens 22, so as to obtain the microlens array of fig. 1 a.
In the arrangement of the embodiment of the present invention, if there are a plurality of first array regions B1, the length of the edge coincidence between any two first array regions B1 should be less than the length of the edge of the first array region B1, such as the region marked 121 in fig. 2. Similarly, if there are a plurality of second array regions B2, the length of the edge overlap between any two second array regions B2 should be less than the length of the edge of second array region B2.
According to the micro lens array provided by the embodiment of the invention, by the arrangement mode, the problem of ghost shadow caused by the existing micro lens array can be effectively solved in a simple mode on the premise of not influencing optical performance, and the design optimization is simple.
Microlens arrays according to various embodiments of the present invention are described below with reference to FIGS. 1 a-5.
In the first embodiment, the first step is,
as shown in fig. 2, in the present embodiment, the basic lens is designated 110 and the first lens is designated 121. In the embodiment of fig. 2, s and t are both selected to be 5, m is an integer equal to or greater than 1, n is 0, and the first lens 21 is equally scaled 1/2 with respect to the base lens 10. Wherein the area unit a is the same size as the first lens 21.
The microlens array 100 is configured to be arranged as follows:
in a 5 × 5 array in which the area cells a are arranged, a plurality of first array regions B1 are selected to be arranged as the basic lenses 10, and the first array region B1 is a 2 × 2 array region, in which the length of the edge coincidence between any two first array regions B1 is equal to or less than the side length of the second lens 22 extending in the edge direction. Specifically, as shown in fig. 2, the length of the edge overlap between the two first array regions B1 is equal to or less than the length of the first array region B1, and when the length of the edge overlap is 0, the two first array regions B1 are completely misaligned in the length direction. Whereas the edge coincidence length between the two first array regions B1 is equal to or less than the width of the first array region B1 in the width direction, the two first array regions B1 are completely misaligned in the width direction when the edge coincidence length is 0.
Through the microlens array of this concrete setting, arrange the convenience and make simply, can effectively solve the ghost problem, optical effect is good.
Of course, in the embodiment of fig. 2, only an example of four first array regions in a 5 × 5 array is shown, however, it should be understood by those skilled in the art that three or 5, or even other numbers of first array regions may be provided in the 5 × 5 array by other arrangements, which are not shown here. It should be noted that fig. 2 shows an alternative embodiment of the basic lens 210 and the anamorphic lens 20, i.e., the first lens 21, in which the size of the first lens 21 is 1/2 of the basic lens, but based on the above arrangement, those skilled in the art can also use other arrangement illustrations not shown in the figures for the two sizes of lenses, and the illustration is not repeated here.
In the second embodiment, the first embodiment of the method,
according to some embodiments of the invention, m, n are integers greater than or equal to 1, the first lens 21 is equi-scaled 2/3 with respect to the base lens 10, the second lens 22 is equi-scaled 1/3 with respect to the base lens 10;
the area unit a is the same size as the second lens 22, and the microlens array 100 is configured to be arranged as follows:
in the s × t array arranged by the area unit a, u first array areas B1 are selected to be the first lenses 21, where the first array area B1 is a 2 × 2 array area, v second array areas B2 are selected to be the basic lenses 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 areas B3, that is, the second lenses 322, that is, the area unit is an equal-sized area.
Wherein the edge overlap length between any two of the first array regions B1 is less than or equal to the edge length of the first array region B1; the edge coincidence length between any two second array regions B2 is equal to or less than the edge length of the second array region B2.
In one particular embodiment as shown in fig. 3, the primary lens is labeled 210, the first lens is labeled 221, and the second lens is labeled 222.
As shown in fig. 3, the area unit a and the second lens 222 have the same size, and are arranged in 12 × 10 array by using the second lens 222 as an array, 11 first array areas B1 are selected to be the first lenses 221, and 6 second array areas B2 are selected to be the basic lenses 210. As can be seen from fig. 3, the edge overlap length of any two first array regions B1 is equal to or less than the corresponding edge length of the first array region B1, and when the edge overlap length is less than 0, it indicates that the two first array regions B1 are not overlapping in this direction. For example, in the length direction, the overlapping length between two first array regions B1 does not exceed its length, even if the overlapping length is 0, i.e. completely misaligned, such as the leftmost and rightmost two first array regions B1; it is also understood that the overlap length between the two first array regions B1 does not exceed the width, if any. Accordingly, the edge coincidence length of any two of the second array regions B2 is equal to or less than the edge length of the second array region B2.
Through the microlens array of this concrete setting, arrange the convenience and make simply, can effectively solve the ghost problem, optical effect is good.
In the third embodiment, the first step is that,
in another embodiment as shown in fig. 4, the primary lens is designated 310, the first lens is designated 321, and the second lens is designated 322. This embodiment differs from the above-described embodiment of fig. 3 in that 14 first array regions B1 are selected to be the first lenses 321, 5 second array regions B2 are selected to be the basic lenses 310, and the rest are the third array regions B3, i.e., the second lenses 322.
A lens array 1000 according to the second embodiment of the present invention comprises the microlens array 100 according to the first embodiment of the present invention, and a plurality of the microlens arrays 100 are arranged without periodicity to form the lens array 1000 having a rectangular outer contour.
In some embodiments of the invention, the lens array may be arranged as follows: selecting any at least one of 1/a, 2/a, … … and (a-1/a) from the lens array to obtain a partial lens, wherein a is an integer; repeating the above step S1, wherein a takes 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 lens array with a rectangular outer contour. By the arrangement mode, the problem of ghost shadow caused by the existing micro-lens array can be effectively solved in a simple mode on the premise of not influencing optical performance, and the design optimization is simple.
In the particular embodiment shown in fig. 5, the lens array 1000 includes a plurality of microlens arrays 100 as shown in fig. 2. The arrangement is as follows: 1/4, 3/4 are selected as a first partial lens 101 and a second partial lens 102, and 2/5, 3/5 are selected as a third partial lens 103 and a fourth partial lens 104 from the microlens array 100, and the two microlens arrays 100 are arranged in a first row along the length direction thereof, the first partial lens 101 and the second partial lens 102 are arranged in a second row along the length direction thereof, the third partial lens 103 and the fourth partial lens 104 are arranged in a third row along the length direction thereof, and then the first row, the second row and the third row are arranged in order in the width direction of the microlens array.
Of course, fig. 5 provides only one example of the arrangement, and it should be understood by those skilled in the art that any manner of selecting and arranging the microlens array 100 and forming the lens array 1000 according to the above arrangement may be selected and fall within the scope of the present invention.
A TOF transmitting module according to an embodiment of the third aspect of the invention, comprising: according to the microlens array 100 and the laser emitter of the first embodiment of the present invention, the laser emitter is disposed corresponding to the microlens array 100 to refract the laser energy emitted from the laser emitter out through the microlens array 100.
According to the TOF emission module provided by the embodiment of the invention, the micro lens array which is randomly arranged is used as the optical diffusion sheet, and after laser energy emitted by the laser emitter is refracted by the micro lens array, the projected light field does not have the fringe phenomenon of ghost, so that the optical effect is better.
According to some embodiments of the present invention, the lenses of the microlens array 100 are all convex or concave lenses, and the laser emitters are disposed on the convex or concave side of the lenses. Thus, the imaging effect obtained by refracting and projecting the laser energy is better. Other constructions and operations of TOF transmitting modules according to embodiments of the invention are known to those of ordinary skill in the art and will not be described in detail herein.
An electronic device according to an embodiment of a fourth aspect of the invention comprises a TOF transmitting module according to an embodiment of the above third aspect of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. A microlens array, comprising:
at least one base lens configured as a rectangular lens;
at least one anamorphic lens, a plurality of which are respectively enlarged or reduced in equal proportion to the base lens;
the base lens and the anamorphic lens are arranged aperiodically to form the microlens array having a rectangular outer profile.
2. The microlens array of claim 1, wherein the ratio of the length L to the width W of the base lens is 4: 3.
3. the microlens array as claimed in claim 1, wherein the base lenses and the anamorphic lenses are arranged such that the edges of any two adjacent lenses are coincident.
4. The microlens array of any of claims 1-3, wherein each of the anamorphic lenses is demagnified relative to the base lens in the ratio of: 1/4, 1/3, 1/2, 2/3, or 3/4.
5. A microlens array as claimed in any one of claims 1 to 3, wherein the proportion of each anamorphic lens to the base lens magnification is: 4/1, 3/1, 2/1, 3/2, or 4/3.
6. The microlens array of claim 1, wherein the anamorphic lens comprises m first lenses, n second lenses;
the microlens array is configured to be arranged as follows: dividing u first array regions, v second array regions, and y third array regions in an s x t array arranged by a region unit, wherein the size of the region unit is the same as the smallest one of the first lens, the second lens, and the basic lens,
wherein the first lenses are arranged in the first array region, the second lenses are arranged in the second array region, and the basic lenses are arranged in the third array region, wherein the edge coincidence length between any two first array regions is less than or equal to the edge length of the first array regions; the edge coincidence length between any two second array regions is less than or equal to the edge length of the second array regions;
wherein m, n, s, t, u, v and y are integers not less than 0.
7. The microlens array as in claim 6, wherein m is an integer of 1 or more, n is 0, and the first lens is scaled down 1/2 with respect to the base lens;
the area unit is the same size as the first lens, and the microlens array is configured to be arranged as follows:
in the s-t array taking the area units as the arrangement units, a plurality of first array areas are selected to be set as basic lenses, the first array areas are 2-2 array areas, and the edge overlapping length between any two first array areas is smaller than or equal to the side length of the second lens extending along the edge direction.
8. The microlens array of claim 7 wherein s and t are both 5 and the first array region comprises four.
9. The microlens array as claimed in claim 6, wherein m and n are integers of 1 or more, the first lens is scaled down 2/3 equally with respect to the base lens, and the second lens is scaled down 1/3 equally with respect to the base lens;
the area unit is the same size as the second lens, and the microlens array is configured to be arranged as follows:
in the s-t array arranged by the area units, u first array areas are selected to be set as first lenses, wherein the first array areas are 2-2 array areas, v second array areas are selected to be set as basic lenses, the second array areas are 3-3 array areas, u and v are integers more than or equal to 1,
wherein an edge coincidence length between any two first array regions is less than or equal to the edge length of the first array regions; the edge coincidence length between any two second array regions is less than or equal to the edge length of the second array regions.
10. The microlens array of claim 9 wherein s-12, t-10, u-11, v-6.
11. The microlens array of claim 9 wherein s-12, t-10, u-14, and v-5.
12. A lens array comprising a plurality of microlens arrays according to any one of claims 1 to 11, wherein the plurality of microlens arrays are arranged without periodicity to constitute the lens array having a rectangular outer contour.
13. The lens array of claim 12, wherein the lens array is arranged as follows:
s1, selecting any at least one of 1/a, 2/a, … … and (a-1/a) from the length direction or the width direction of the lens array to obtain a partial lens, wherein a is an integer;
s2, repeating the above step S1, wherein a takes different values to obtain a plurality of said partial lenses;
s3, arranging and combining at least one partial lens and at least one micro lens array in the length direction and the width direction to form the lens array with a rectangular outer contour.
14. A TOF transmission module, comprising:
a microlens array according to any one of claims 1 to 11 or a lens series according to any one of claims 12 to 13;
the laser emitter is arranged corresponding to the micro lens array so as to refract laser energy emitted by the laser emitter out through the micro lens array.
15. The TOF transmitting module of claim 14 wherein the lenses of the microlens array are each a convex or concave lens and the laser emitter is disposed on a convex or concave side of the lens.
16. An electronic device comprising a TOF transmitting module according to claim 14 or 15.
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| CN202010036508.2A CN113189682A (en) | 2020-01-14 | 2020-01-14 | Microlens array, lens array, TOF emission module, and electronic apparatus having the same |
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| CN202010036508.2A CN113189682A (en) | 2020-01-14 | 2020-01-14 | Microlens array, lens array, TOF emission module, and electronic apparatus having the same |
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Application publication date: 20210730 |