CN217543555U - Lattice structured light system - Google Patents

Abstract

The utility model provides a lattice structure photosystem. The lattice structured light system includes a light source and a lattice structured light assembly, the lattice structured light assembly including: a base layer; the first micro-lens array layer is arranged on the surface of one side of the substrate layer, and the surface of one side, far away from the substrate layer, of the first micro-lens array layer is an incident surface; the first micro lens array layer and the second micro lens array layer respectively comprise a plurality of micro lenses and are provided with at least two micro lenses in a first direction and a second direction which are perpendicular to each other, the period of the first micro lens array layer is different from that of the second micro lens array layer, and the thickness of the first micro lens array layer is different from that of the second micro lens array layer. The utility model provides a lattice structure photosystem among the prior art have the inhomogeneous problem of luminance distribution.

Description

Lattice structured light system

Technical Field

The utility model relates to an artificial intelligence field particularly, relates to a lattice structure photosystem.

Background

At present, the modes for realizing 3D imaging in the industry mainly include binocular, structured light and TOF, wherein the structured light has the advantages of high resolution, low power consumption and the like. The existing speckle structured light is mainly realized by DOE (diffractive optical element), and the generated lattice has the following two modulation difficulties: one is uneven brightness distribution, bright center and dark edge of the lattice; the other is uneven distribution of lattice positions, dense center and sparse edge.

In the lattice structured light system in the prior art, a layer of MLA (micro lens array) is usually adopted for direct collimation to generate regular lattice structured light, but because the conventional VCSEL has uneven light field distribution, the luminance distribution trend of each point of the lattice generated by the collimation of the micro lens array is consistent with the light field distribution of the VCSEL light source, the finally formed lattice has uneven luminance distribution, and the lattice structured light system is not beneficial to application.

That is, the lattice structured light system in the related art has a problem of uneven brightness distribution.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a lattice structure light system to there is the inhomogeneous problem of luminance distribution in the lattice structure light system among the solution prior art.

In order to achieve the above object, the utility model provides a lattice structure photosystem, including light source and lattice structure light subassembly, lattice structure light subassembly includes: a base layer; the first micro-lens array layer is arranged on the surface of one side of the substrate layer, and the surface of one side, far away from the substrate layer, of the first micro-lens array layer is an incident surface; the first micro lens array layer and the second micro lens array layer respectively comprise a plurality of micro lenses and are provided with at least two micro lenses in a first direction and a second direction which are perpendicular to each other, the period of the first micro lens array layer is different from that of the second micro lens array layer, and the thickness of the first micro lens array layer is different from that of the second micro lens array layer.

Further, the microlens is a spherical microlens.

Further, the surfaces of the microlenses of the first microlens array layer include one of a free-form surface and a polynomial surface; and/or the surfaces of the microlenses of the second microlens array layer include one of a free-form surface and a polynomial surface.

Further, the period of the first microlens array layer is greater than the period of the second microlens array layer.

Further, the period d0 of the first microlens array layer satisfies: 10 um-d0-300um-covered fabric; and/or the period d1 of the second microlens array layer satisfies: 5um & lt & gt d1 & lt & gt 300um.

Further, the number of the light sources is one or more, when the number of the light sources is multiple, the light sources are arranged along a straight line at intervals, and the distance ds between two adjacent light sources in the light sources satisfies: 35um and ds are woven into 50um.

Further, the number of the light sources is one or more, when the number of the light sources is multiple, the multiple light sources at least include a first light source and a second light source, and the offset p of the lattice structured light formed by the first light source and the second light source has a proportional relationship with the basic period T of the first light source or the second light source.

Further, a distance h0 between the light source and the first microlens array layer satisfies: 0.3 mm-over-h0-over-0.7mm.

Further, the integral thickness h of the lattice-structured light assembly satisfies: 0.2mm is covered with h and then 3mm.

Further, the distance H from the second microlens array layer to the receiving surface of the lattice structured light system satisfies: 30mm and H are constructed with 500mm.

Use the technical scheme of the utility model, lattice structure photosystem includes light source and lattice structure light subassembly, and lattice structure light subassembly includes: a base layer; the first micro-lens array layer is arranged on one side surface of the substrate layer, and the surface, far away from the substrate layer, of one side of the first micro-lens array layer is an incident surface; the first micro-lens array layer and the second micro-lens array layer respectively comprise a plurality of micro-lenses and are respectively provided with at least two micro-lenses in a first direction and a second direction which are perpendicular to each other, the period of the first micro-lens array layer is different from that of the second micro-lens array layer, and the thickness of the first micro-lens array layer is different from that of the second micro-lens array layer.

This application adopts the form on double-deck microlens array layer through setting up first microlens array layer and second microlens array layer, through the thickness of rationally adjusting first microlens array layer and second microlens array layer, the arrangement and the cycle of microlens on first microlens array layer and the second microlens array layer, can effectively adjust the resolution ratio of lattice structure light subassembly, and then obtain the lattice structure light that position and luminance all evenly distributed. And the brightness of each point in the lattice structured light is uniform, which is beneficial to improving the performance of the whole lattice structured light assembly. The obtained dot matrix has uniform space, so that the acquired information is more uniform and accurate. In addition, the lattice structured light assembly can be used in the artificial intelligence fields of various three-dimensional imaging such as face recognition, depth detection and automatic driving.

Drawings

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

fig. 1 shows a schematic structural diagram of a lattice structured light system in the prior art;

FIG. 2 shows a schematic diagram of the optical field distribution of a conventional VCSEL;

FIG. 3 illustrates a graph of the lattice structured light effect of the lattice structured light system of FIG. 1;

FIG. 4 shows a receiving surface optical field profile of the lattice-structured optical system of FIG. 1;

fig. 5 shows a schematic diagram of the light transmission of a lattice structured light system according to an alternative embodiment of the present invention;

fig. 6 shows a schematic diagram of the light transmission of a lattice structured light system according to another alternative embodiment of the present invention;

fig. 7 shows a schematic diagram of a lattice structured light system generating lattice structured light according to an alternative embodiment of the present invention;

FIG. 8 shows a partial enlarged view of FIG. 7;

FIG. 9 illustrates a three-dimensional block diagram of a lattice structured light assembly of an alternative embodiment of the present invention;

FIG. 10 illustrates a partial schematic view of an angle of a lattice structured light assembly of the present invention;

fig. 11 is a partial schematic view of another angle of the lattice-structured light assembly of the present invention;

fig. 12 is a schematic diagram of a lattice structured light assembly according to a first embodiment of the present invention;

FIG. 13 shows a dot matrix effect diagram of the dot matrix structured light assembly of FIG. 12;

FIG. 14 shows a cross-sectional plot of the lattice intensity of the lattice-structured light assembly of FIG. 12;

fig. 15 is a schematic view of a lattice structured light module according to a second embodiment of the present invention;

FIG. 16 shows a dot matrix effect diagram of the dot matrix structured light assembly of FIG. 15;

FIG. 17 shows a cross-sectional plot of the lattice intensity of the lattice-structured light assembly of FIG. 15;

fig. 18 shows a schematic diagram of a lattice structured light assembly according to a third embodiment of the present invention;

FIG. 19 shows a dot matrix effect diagram of the dot matrix structured light assembly of FIG. 18;

FIG. 20 shows a cross-sectional plot of the lattice intensity of the lattice structured light assembly of FIG. 18.

Wherein the figures include the following reference numerals:

10. a base layer; 20. a first microlens array layer; 30. a second microlens array layer.

Detailed Description

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

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

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

Fig. 1 to 4 are related views of a dot matrix structured light system in the prior art. In the existing scheme, a Diffraction Optical Element (DOE) is mostly adopted to generate lattice structured light, and the following two modulation difficulties are involved: one is that the brightness is distributed unevenly, the center of the dot matrix is bright, and the edge is dark; the other is uneven position distribution, dense center and sparse edge.

As shown in fig. 1, a layer of microlens array in the prior art is structured, and a layer of microlens array is directly collimated to generate regular lattice structured light. As shown in fig. 2, for the conventional VCSEL optical field distribution, since the conventional VCSEL optical field distribution is not uniform, when a lattice generated by one-layer microlens array collimation is adopted, an optical effect diagram of a lattice structure of a receiving surface is shown in fig. 3, and an optical field distribution condition of the receiving surface is shown in fig. 4, it can be seen from fig. 3 and fig. 4 that the luminance distribution trend of each point of the lattice generated by one-layer microlens array collimation is consistent with the VCSEL optical field distribution, which easily has the problems of uneven luminance and position distribution, and is not beneficial to application.

In order to solve the problem that the lattice structure photosystem among the prior art has the luminance uneven distribution, the utility model discloses a lattice structure photosystem.

As shown in fig. 5 to 20, the lattice-structured light system includes a light source emitting light to a lattice-structured light assembly, and the lattice-structured light assembly includes: a base layer 10; the first microlens array layer 20, the first microlens array layer 20 is arranged on one side surface of the substrate layer 10, and one side surface of the first microlens array layer 20 away from the substrate layer 10 is an incident surface; a second microlens array layer 30, the second microlens array layer 30 being disposed on the other side surface of the substrate layer 10, the first and second microlens array layers 20 and 30 each including a plurality of microlenses and having at least two microlenses in first and second directions perpendicular to each other, a period of the first microlens array layer 20 being different from a period of the second microlens array layer 30 and a thickness of the first microlens array layer 20 being different from a thickness of the second microlens array layer 30.

This application is through setting up first microlens array layer 20 and second microlens array layer 30, adopt the form on double-deck microlens array layer, through the thickness of rationally adjusting first microlens array layer 20 and second microlens array layer 30, arrange and the cycle of microlens on first microlens array layer 20 and the second microlens array layer 30, can effectively adjust lattice structure optical assembly's resolution ratio, and then obtain the lattice structure light that position and luminance all evenly distributed. And the brightness of each point in the lattice structured light is uniform, which is favorable for improving the performance of the whole lattice structured light assembly. The obtained dot matrix has uniform space, so that the acquired information is more uniform and accurate. In addition, the lattice structured light assembly can be used in the artificial intelligence fields of various three-dimensional imaging such as face recognition, depth detection and automatic driving.

As shown in fig. 9 to 11, the first microlens array layer 20 of the present application includes m × p first microlenses, and the second microlens array layer 30 includes n × q second microlenses. The micro lens comprises a first micro lens and a second micro lens, and the first micro lens and the second micro lens are both spherical micro lenses. Of course, the first and second microlenses are standard spherical microlenses for focusing and collimating. Of course, to improve the uniformity of the brightness of the scattered dots in the dot matrix, the first and second microlenses may be non-standard spherical microlenses. The first microlens is preferably an nonstandard spherical microlens, and can modulate the distribution of the light field of the light source, so that the light field incident on the second microlens array layer 30 has uniform brightness, and the brightness of each point is more uniform after the light field is collimated into a dot matrix by the second microlens array layer 30.

Specifically, the surfaces of the microlenses of the first microlens array layer 20 include one of a free-form surface and a polynomial surface; the surfaces of the microlenses of the second microlens array layer 30 include one of a free-form surface and a polynomial surface. The microlenses of the first microlens array layer 20 are preferably designed as a free-form surface or a curved surface determined by the rise formula. The following is an example of a one-rise formula, from which the rise of a surface is determined:

the more the m and n coefficients are, the larger the curve surface can be scheduled, the closer the degree of freedom of the free curve surface is, and the more convenient the curve surface can be adjusted to meet the requirement of light intensity distribution. The free-form surface can be calculated by numerical calculation software to obtain curved surface point cloud data, and then the point cloud data is constructed into a curved surface. The free-form surface can be regarded as infinite freedom, and light field distribution which is difficult to realize by different conventional curved surfaces can be obtained. The microlenses of the second microlens array layer 30 are also preferably free-form surfaces or surfaces defined by the rise-of-the-row formula, because the first microlens array layer 20 does not necessarily form an ideal focal point when adjusting the light field distribution with non-standard spherical microlenses, and does not have a good collimating effect for the diffuse spot standard spherical microlenses. The plurality of microlenses on the first microlens array layer 20 and the plurality of microlenses on the first microlens array layer 20 are preferably arranged in an array to ensure that the lattice spacing is equal.

Specifically, the period d0 of the first microlens array layer 20 satisfies: 10 um-d0-300um-covered fabric; the period d1 of the second microlens array layer 30 satisfies: 5um & lt d1 & gt 300um. Preferably, the period of the first microlens array layer 20 is greater than the period of the second microlens array layer 30. So as to increase the number of scattered points in a fixed range and improve the resolution. And the reasonable adjustment of the density of the generated dot matrix can be adjusted by reasonably adjusting d0 and d1, and the range of applicable resolution is wide.

Specifically, the number of the light sources is one or more, when the number of the light sources is plural, the plural light sources are arranged along a straight line at intervals, and a distance ds between two adjacent light sources in the plural light sources satisfies: 35um and ds are woven into 50um. It should be noted that any two adjacent light sources in the plurality of light sources are arranged at equal intervals.

Specifically, when the light source is a plurality of light sources, the plurality of light sources at least include a first light source and a second light source, and the offset p of the lattice structured light formed by the first light source and the second light source has a proportional relationship with the fundamental period T of the first light source or the second light source. Preferably, T is N times of p, a receiving surface generates a uniform lattice, and the lattice distance is T/N; or p is N times of T to generate uniform lattice with T space. The above N is an integer.

Specifically, the distance h0 between the light source and the first microlens array layer 20 satisfies: 0.3 mm-over-h0-over-0.7mm. By adjusting the distance between the light source and the first microlens array layer 20, the angle of the light rays entering the first microlens array layer 20 can be effectively planned, so that a light ray transmission path is planned, and the light transmission efficiency is ensured.

Specifically, the overall thickness h of the lattice structured light assembly satisfies: 0.2mm is enclosed h and is enclosed 3mm. The integral thickness of the lattice structure optical assembly is reasonably controlled within a reasonable range, so that the use reliability of the lattice structure optical assembly is facilitated, the lightness, thinness and miniaturization of the lattice structure optical assembly can be further guaranteed, and the lattice structure optical assembly is convenient to apply to various small-size equipment.

Specifically, the distance H from the second microlens array layer 30 to the receiving surface of the lattice structured light system satisfies: 30mm are woven H-woven fabrics of 500mm. By restricting the distance from the second micro lens array layer 30 to the receiving surface of the lattice structured light system, the lattice structured light can be imaged perfectly on the receiving surface, and the imaging stability is ensured.

As shown in fig. 5 to 20, the method of generating the lattice-structured light using the above-described lattice-structured light module includes: the parameters of the lattice structured light generated by the lattice structured light assembly are adjusted by adjusting one or more of the thickness of the first microlens array layer 20, the thickness of the second microlens array layer 30, the period of the first microlens array layer 20, the period of the second microlens array layer 30, and the distance between the first microlens array layer 20 and the light source of the lattice structured light assembly.

As shown in fig. 5, the method of generating lattice structured light further includes: the method comprises the steps of obtaining a light source S1, adjusting the distance between the light source S1 and a first micro-lens array layer 20, enabling light emitted by the light source S1 to be incident to the first micro-lens array layer 20 at a preset divergence angle, and enabling the light to be converged on a base layer 10 of an array structure light assembly through the first micro-lens array layer 20 to form a plurality of secondary light sources S1', S1',... (ii) a After being collimated by the second microlens array layer 30, the plurality of secondary light sources emit a plurality of parallel lights to a receiving surface to form lattice structured light. The included angle of each beam of parallel light and the vertical line has slight difference.

Specifically, in the process of acquiring the light source, the light source includes one or more. As shown in fig. 6, when the light source is a plurality of light sources, the light emitted from the plurality of light sources S1, S2, S3, is incident on the first microlens array layer 20 at a certain divergence angle, and is respectively converged into N focal points S1', S1 ″ and. S2', S2'; s3', S3'; .... Secondary light sources S1', S1 ″ of the base layer 10.; s2', S2'; s3', S3'; ... After being collimated by the second microlens array layer 30, the light is emitted as a plurality of parallel beams, and lattice-structured light is formed on a receiving surface.

As shown in fig. 7 and 8, when one light source is obtained, the lattice-structured light pitch formed at the receiving surface by the single light source S1 is expressed by a fundamental period T satisfying:

where H is a distance from the second microlens array layer 30 to the receiving surface; f is the distance from the secondary light source to the first microlens array layer 20; d1 is the period of the second microlens array layer 30.

And knowing that the basic period of the lattice generated by each light source is T according to the geometrical relation. Multiple light sources and the likeAt a distance d from the array _s The period of the first microlens array layer 20 is d0, the period of the second microlens array layer 30 is d1, and when a plurality of light sources are obtained, the plurality of light sources at least include a first light source S1 and a second light source S2, and by adjusting a relative offset amount Δ p1 between a first secondary light source formed after light emitted by the first light source S1 passes through the first microlens array layer 20 and the second microlens array layer 30, and a relative offset amount Δ p2 between a second secondary light source formed after light emitted by the second light source S2 passes through the first microlens array layer 20 and the second microlens array layer 30, an offset amount p between lattice structure light formed by the first light source S1 and the second light source S2 is further adjusted. That is, Δ p1 and Δ p2 determine the amount of shift p between lattice-structured lights formed by two light sources, p = H/(H-F) × Δ p1- Δ p2.

Specifically, the distance between the lattice structured light formed by the first light source and the second light source is adjusted by adjusting the relationship between the offset p of the lattice structured light formed by the first light source and the second light source and the basic period T of the first light source or the second light source.

The receiving surface exhibits different results when p has the following relationship to T:

1) T is N times of p, the receiving surface generates a uniform lattice, and the lattice distance is T/N;

2) p is N times of T, a uniform lattice is generated, and the lattice distance is T;

3) p and T have no multiple relation, and all scattered points are connected together in a staggered mode to form continuous light spots.

Therefore, the ideal lattice structured light can be obtained only when p and T are in integral multiple relation. In summary, the period T of the lattice-structured light is determined by the angle difference of the light emitted from the adjacent microlenses on the second microlens array layer 30, and the period d1 of the second microlens array layer 30, the overall thickness h of the lattice-structured light assembly, the period d0 of the first microlens array layer 20, and the distance h0 between the light source and the first microlens array layer 20 affect the effect of the lattice-structured light.

Example one

Fig. 12 is a schematic structural diagram of a lattice-structured optical component according to the first embodiment.

In the present embodiment, p =3T. Light source spacing ds =47 μm; the period d0=42 μm of the first microlens array layer 20; the period d1=11 μm of the second microlens array layer 30; the distance h0=0.5mm of the light source from the first microlens array layer 20; the distance H =50mm from the second microlens array layer 30 to the receiving face; the overall thickness h =0.5mm of the lattice structured light assembly.

As shown in fig. 13, a dot effect diagram generated by the dot structure optical assembly of the present embodiment is shown, and it can be seen from comparison with fig. 3 that the position and the brightness distribution of the dot structure light of the present embodiment are uniform, and as shown in fig. 14, a cross-sectional diagram of the dot intensity of the present embodiment is shown, and it can be seen from comparison with fig. 4 that the light intensity distribution is relatively uniform.

Example two

Fig. 15 is a schematic structural diagram of a lattice structured light assembly according to the second embodiment.

In the present embodiment, T =2p; the difference from the first embodiment is that the overall thickness h of the lattice structured light assembly is different, h =0.32mm in this embodiment.

In the present embodiment, the light source spacing ds =47 μm; the period d0=42 μm of the first microlens array layer 20; the period d1=11 μm of the second microlens array layer 30; the distance h0=0.5mm of the light source from the first microlens array layer 20; the distance H =50mm from the second microlens array layer 30 to the receiving surface;

as shown in fig. 16, the dot effect diagram generated by the dot-matrix structured light module of the present embodiment is compared with fig. 3 to show that the position and the brightness distribution of the dot-matrix structured light are uniform, and as shown in fig. 17, the dot-matrix intensity profile diagram of the present embodiment is compared with fig. 4 to show that the light intensity distribution is uniform.

EXAMPLE III

Fig. 18 is a schematic structural diagram of a lattice structured light module according to a third embodiment.

In the present embodiment, T =3p; the difference from the first embodiment is that ds, d0, d1 are different, and the light source spacing ds =40 μm; the period d0=38 μm of the first microlens array layer 20; the period d1=12 μm of the second microlens array layer 30.

In the present embodiment, the distance h0=0.5mm between the light source and the first microlens array layer 20; the distance H =50mm from the second microlens array layer 30 to the receiving surface; the overall thickness h =0.5mm of the lattice structured light assembly.

As shown in fig. 19, it can be seen from comparison with fig. 3 that the position and the brightness distribution of the lattice-structured light are uniform for the lattice effect diagram generated by the lattice-structured light assembly of the present embodiment, and as shown in fig. 20, which is a cross-sectional diagram of the lattice intensity of the present embodiment, it can be seen from comparison with fig. 4 that the light intensity distribution is relatively uniform.

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

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

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

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

Claims (10)

1. A lattice structured light system comprising a light source and a lattice structured light assembly, the lattice structured light assembly comprising:

a base layer (10);

a first microlens array layer (20), wherein the first microlens array layer (20) is arranged on one side surface of the substrate layer (10), and one side surface, away from the substrate layer (10), of the first microlens array layer (20) is an incidence surface;

a second microlens array layer (30), the second microlens array layer (30) being disposed on the other side surface of the base layer (10), the first microlens array layer (20) and the second microlens array layer (30) each including a plurality of microlenses and having at least two of the microlenses in each of first and second directions perpendicular to each other, a period of the first microlens array layer (20) being different from a period of the second microlens array layer (30) and a thickness of the first microlens array layer (20) being different from a thickness of the second microlens array layer (30).

2. The lattice structured light system of claim 1, wherein the microlenses are spherical microlenses.

3. The lattice structured light system of claim 1,

the surfaces of the microlenses of the first microlens array layer (20) include one of a free-form surface and a polynomial surface; and/or

The surfaces of the microlenses of the second microlens array layer (30) include one of a free-form surface and a polynomial surface.

4. Lattice structured light system according to claim 1, characterized in that the period of the first microlens array layer (20) is larger than the period of the second microlens array layer (30).

5. Lattice structured light system as claimed in one of the claims 1 to 4,

the period d0 of the first microlens array layer (20) satisfies: 10 um-d0-300um-covered fabric; and/or

The period d1 of the second microlens array layer (30) satisfies: 5um & lt d1 & gt 300um.

6. The lattice-structured light system as claimed in claim 1, wherein the number of the light sources is one or more, and when the number of the light sources is plural, the plural light sources are arranged at intervals along a straight line, and a distance ds between two adjacent light sources in the plural light sources satisfies: 35um and ds are woven into 50um.

7. The lattice-structured light system as claimed in claim 1, wherein the light source is one or more, and when the light source is plural, the plural light sources include at least a first light source and a second light source, and an offset p of the lattice-structured light formed by the first light source and the second light source has a proportional relationship with a fundamental period T of the first light source or the second light source.

8. Lattice-structured light system as claimed in claim 1, characterized in that a distance h0 between the light source and the first microlens array layer (20) satisfies: 0.3mm and h0 were constructed.

9. The lattice structured light system of claim 1 wherein the overall thickness h of the lattice structured light assembly satisfies: 0.2mm is enclosed h and is enclosed 3mm.

10. Lattice structured light system according to claim 1, characterized in that the distance H of the second microlens array layer (30) to the receiving surface of the lattice structured light system satisfies: 30mm and H are constructed with 500mm.

Images