CN114839786A

CN114839786A - Optical element, optical module and beam shaping method

Info

Publication number: CN114839786A
Application number: CN202210588836.2A
Authority: CN
Inventors: 蔡磊; 刘兴胜
Original assignee: Focuslight Technologies Inc
Current assignee: Focuslight Technologies Inc
Priority date: 2022-05-26
Filing date: 2022-05-26
Publication date: 2022-08-02

Abstract

The utility model provides an optical element, optical module and beam shaping method, relate to optical technology field, this optical element includes transmission portion and refraction portion, the transmission portion is enclosed to the refraction portion, the transmission portion is including transmission incident surface and transmission emergent surface, the refraction portion is including refraction incident surface and refraction emergent surface, incident light incident transmission incident surface and refraction incident surface, and pass through the transmission portion and form the transmission light beam of first energy distribution by transmission emergent surface outgoing, pass through the refraction portion refraction back and form the refraction light beam of second energy distribution by refraction emergent surface outgoing, the light beam of third energy distribution is formed with the superposition of refraction light beam to the transmission light beam. The optical element can cut and rearrange the light beams, so that the distribution characteristics of the light beams are changed, and the optical element is further suitable for different application scenes.

Description

Optical element, optical module and beam shaping method

Technical Field

The invention relates to the technical field of optics, in particular to an optical element, an optical module and a beam shaping method.

Background

The semiconductor laser has the advantages of small volume, light weight, high reliability, long service life and low power consumption, and is widely applied to various fields of national economy, such as pumping, medical treatment and industrial processing. However, the popularization and application of the semiconductor laser are limited by the quality of the light beam, so that the improvement of the uniformity, brightness and power of the output light spot of the semiconductor laser is the current important research direction.

The semiconductor laser has a large divergence angle, and the superposition of light beams at the central position is stronger than that at the edge position, so that the energy of output light spots is in Gaussian distribution and the light spots are not uniform. In order to solve the problem of uneven light spots caused by a large divergence angle, flat-top light spots can be realized by superposing differential light beams and gradually reduced parts one by one at present, but the method needs to control the parameters of each differential unit one by one, and has the problems of higher structural precision requirement, higher manufacturing cost, higher assembly and adjustment alignment precision requirement and the like.

Disclosure of Invention

The invention aims to provide an optical element, an optical module and a beam shaping method, which can cut and rearrange beams so as to change the distribution characteristics of the beams and further be suitable for different application scenes.

The embodiment of the invention is realized by the following steps:

in a first aspect of embodiments of the present invention, an optical element is provided, where the optical element includes a transmission portion and a refraction portion, the refraction portion is disposed around the transmission portion, the transmission portion includes a transmission incident surface and a transmission exit surface, the refraction portion includes a refraction incident surface and a refraction exit surface, incident light enters the transmission incident surface and the refraction incident surface and exits from the transmission exit surface through the transmission portion to form a transmission light beam with a first energy distribution, the transmission light beam is refracted by the refraction portion and exits from the refraction exit surface to form a refraction light beam with a second energy distribution, and the transmission light beam and the refraction light beam are superimposed to form a light beam with a third energy distribution.

Optionally, the refractive portion is disposed around the transmissive portion; or the refraction part comprises at least one sub-refraction part connected with the transmission part.

Optionally, at least one of the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface is provided with a microstructure.

Optionally, the microstructures comprise one-dimensional or two-dimensional concavities and/or convexities.

Optionally, the concave surfaces and/or the convex surfaces are regularly or irregularly arranged.

Optionally, the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface are one of an inclined plane, an inclined convex surface, an inclined concave surface, a positive plane, a positive convex surface and a positive concave surface relative to a surface perpendicular to the optical axis direction.

Optionally, the transmissive portion is provided as a through cavity or a light transmissive optical material.

In a second aspect of the embodiments of the present invention, an optical module is provided, which includes the above optical element.

Optionally, the optical module further includes a lens or a lens group disposed between the light source and the optical element, the lens or the lens group is configured to collimate and/or compress a light beam emitted from the light source to form an incident light, and the incident light passes through the optical element to form a light spot in a preset shape of a third energy distribution.

In a third aspect of the embodiments of the present invention, there is provided a beam shaping method using the above optical element, the method including: the incident light is incident on the transmission incident surface of the transmission part and the refraction incident surface of the refraction part; a transmitted beam emitted from the transmission emission surface through the transmission part to form a first energy distribution; the second energy distribution refracted beam is formed by the refraction of the refraction part and the exit of the refraction exit surface; the transmitted beam and the refracted beam are superimposed to form a beam of a third energy distribution.

Optionally, at least one of the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface is provided with a microstructure, and the method includes: the incident light of the transmission incident surface of the incident transmission part and the refraction incident surface of the refraction part is emitted from the transmission emergent surface through the transmission part to form a transmission light beam with first energy distribution, or is emitted from the refraction emergent surface after being refracted by the refraction part to form a refraction light beam with second energy distribution, and the homogenization is carried out through the microstructure.

Optionally, at least one of the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface is an oblique convex surface or a positive convex surface with respect to a surface perpendicular to the optical axis direction, and the method includes: the incident light of the transmission incident plane of incident transmission portion and the refraction incident plane of refraction portion, or pass through the transmission portion by the transmission exit surface outgoing forms the transmission light beam of first energy distribution, or pass through behind the refraction portion refraction by the refraction exit surface outgoing forms second energy distribution refraction light beam and passes through oblique convex surface or positive convex surface converge, or diffuse again after converging.

Optionally, at least one of the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface is a slant concave surface or a positive concave surface with respect to a surface perpendicular to the optical axis direction, and the method includes: the incident light of the transmission incident plane of incident transmission portion and the refraction incident plane of refraction portion, or pass through the transmission portion by the transmission exit surface outgoing forms the transmission light beam of first energy distribution, or pass through behind the refraction portion refraction by the refraction exit surface outgoing forms second energy distribution refraction light beam and passes through oblique convex surface or positive convex surface are diffused.

In a fourth aspect of the embodiments of the present invention, a method for shaping a light beam by using the optical module is provided, where the method includes: the light beam emitted by the light source is collimated and/or compressed through a lens or a lens group arranged between the light source and the optical element to form incident light; a transmission incident surface of the incident light incident transmission part and a refraction incident surface of the refraction part; a transmitted beam emitted from the transmission emission surface through the transmission part to form a first energy distribution; the second energy distribution refracted beam is formed by the refraction of the refraction part and the exit of the refraction exit surface; and the transmitted light beam and the refracted light beam are superposed to form a light spot with a third energy distribution in a preset form.

The embodiment of the invention has the beneficial effects that:

this optical element includes transmission portion and refraction portion, the transmission portion is located to the refraction portion encloses, the transmission portion is including transmission incident surface and transmission emergent surface, the refraction portion is including refraction incident surface and refraction emergent surface, incident light incident transmission incident surface and refraction incident surface to through the transmission portion by the transmission emergent surface outgoing formation first energy distribution's transmission light beam, form the refraction light beam of second energy distribution by refraction emergent surface outgoing after refraction portion, the light beam of third energy distribution is formed with the superposition of refraction light beam to the transmission light beam. The optical element comprises the transmission part and the refraction part, so that incident light can be divided into a plurality of parts, some parts are transmitted by the transmission part and then emitted, transmitted light beams with first energy distribution are formed in a far field, some parts are refracted by the refraction part and then emitted, refracted light beams with second energy distribution are formed in the far field, the incident light is cut, the transmitted light beams and the refracted light beams which are respectively formed by each part of the incident light are overlapped in the far field to form light beams with third energy distribution, and the incident light is rearranged, namely the energy distribution characteristics of the incident light are changed. The optical element can cut and rearrange the light beam, so that the distribution characteristic of the light beam is changed, the energy distribution characteristic of incident light is not specifically limited, the form of the formed light beam with third energy distribution can be diversified, and the optical element has the advantages of high flexibility and high degree of freedom, and is further suitable for different application scenes.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional structure along an optical axis and an optical path of an optical device according to an embodiment of the present invention;

fig. 2 is a second schematic cross-sectional structure along the optical axis and an optical path of the optical device according to the embodiment of the invention;

fig. 3 is a third schematic cross-sectional view along the optical axis and an optical path of an optical device according to an embodiment of the present invention;

FIG. 4 is a fourth schematic diagram of a cross-sectional structure of an optical element along an optical axis and an optical path according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of an optical element according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of FIG. 5 along the optical axis;

fig. 7 is a second schematic perspective view of an optical device according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of FIG. 7 along the optical axis;

fig. 9 is a third schematic perspective view of an optical element according to an embodiment of the present invention;

FIG. 10 is a schematic cross-sectional view of FIG. 9 along the optical axis;

FIG. 11 is a schematic cross-sectional view of an optical element according to an embodiment of the present invention;

FIG. 12 is a second schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 13 is a third schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 14 is a fourth schematic diagram illustrating a cross-sectional structure of an optical device along an optical axis according to an embodiment of the present invention;

FIG. 15 is a fifth schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

fig. 16 is a fourth schematic perspective view of an optical device according to an embodiment of the present invention;

fig. 17 is a fifth schematic perspective view of an optical device according to an embodiment of the present invention;

fig. 18 is a sixth schematic perspective view of an optical device according to an embodiment of the present invention;

fig. 19 is a seventh schematic perspective view of an optical device according to an embodiment of the present invention;

FIG. 20 is a schematic cross-sectional view of FIG. 19 along the optical axis;

fig. 21 is an eighth schematic perspective view of an optical device according to an embodiment of the present invention;

FIG. 22 is a schematic cross-sectional view of FIG. 21 along the optical axis;

FIG. 23 is a ninth schematic view illustrating a three-dimensional structure of an optical device according to an embodiment of the present invention;

FIG. 24 is a schematic cross-sectional view of FIG. 23 along the optical axis;

FIG. 25 is a cross-sectional view of an optical device according to an embodiment of the present invention;

FIG. 26 is a schematic cross-sectional view of FIG. 25 along the optical axis;

fig. 27 is an eleventh schematic perspective view of an optical device according to an embodiment of the present invention;

FIG. 28 is a schematic cross-sectional view of FIG. 27 along the optical axis;

fig. 29 is a twelfth schematic perspective view of an optical device according to an embodiment of the present invention;

FIG. 30 is a schematic cross-sectional view of FIG. 29 along the optical axis;

FIG. 31 is a sixth schematic sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 32 is a seventh exemplary cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 33 is an eighth schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 34 is a ninth schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 35 is a cross-sectional view of an optical device along an optical axis;

FIG. 36 is an eleventh schematic cross-sectional view taken along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 37 is a twelfth schematic cross-sectional view taken along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 38 is a thirteen schematic cross-sectional views along the optical axis of the optical device according to the embodiment of the present invention;

FIG. 39 is a fourteenth schematic cross-sectional view taken along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 40 is a fifteen schematic cross-sectional view taken along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 41 is a sixteen schematic cross-sectional views along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 42 is a seventeenth schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 43 is an eighteen schematic cross-sectional views along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 44 is a nineteen schematic cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 45 is a twenty-first cross-sectional view along the optical axis of an optical device according to an embodiment of the present invention;

FIG. 46 is a schematic diagram illustrating one of beam-cutting stacks of an optical device according to an embodiment of the present invention;

FIG. 47 is a second schematic diagram illustrating beam splitting and stacking of an optical device according to an embodiment of the present invention;

FIG. 48 is a third schematic diagram illustrating beam splitting and stacking of an optical device according to an embodiment of the present invention;

FIG. 49 is a fourth schematic diagram illustrating beam cutting and stacking of an optical device according to an embodiment of the present invention;

FIG. 50 is a fifth schematic diagram illustrating beam cutting and stacking of an optical device according to an embodiment of the present invention;

FIG. 51 is a sixth schematic view showing the beam cutting superposition of an optical device according to an embodiment of the present invention;

FIG. 52 is a seventh schematic diagram illustrating beam-cutting superposition of an optical device according to an embodiment of the present invention;

FIG. 53 is a schematic diagram of a cross-sectional structure along an optical axis, an optical path and a corresponding linear light spot of an optical device according to an embodiment of the present invention;

FIG. 54 is a schematic diagram of a cross-sectional structure along an optical axis, an optical path and a corresponding surface light spot of an optical device according to an embodiment of the present invention;

fig. 55 is a second schematic diagram of a cross-sectional structure along the optical axis, an optical path and a corresponding surface light spot of the optical element according to the embodiment of the present invention.

Icon: 10-an optical element; 11-a transmissive portion; 111-a transmissive entrance face; 112-a transmissive exit face; 12-a refractive portion; 121-a refractive entrance face; 122-a refractive exit face; 123-sub-refraction; 13-a microstructure; 20-lens.

Detailed Description

The embodiments set forth below represent the information necessary to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure and the accompanying claims.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood that when an element such as a layer, region or substrate is referred to as being "on" or "extending" onto "another element, it can be directly on or extend directly onto the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or extending "directly onto" another element, there are no intervening elements present. Also, it will be understood that when an element such as a layer, region or substrate is referred to as being "on" or "extending over" another element, it can be directly on or extend directly over the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or extending "directly over" another element, there are no intervening elements present. It will also be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

Relative terms such as "below …" or "above …" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe one element, layer or region's relationship to another element, layer or region as illustrated in the figures.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Referring to fig. 1 to 55, in a first aspect of the embodiments of the present invention, an optical element 10 is provided, where the optical element 10 includes a transmission portion 11 and a refraction portion 12, the refraction portion 12 is disposed around the transmission portion 11, the transmission portion 11 includes a transmission incident surface 111 and a transmission exit surface 112, the refraction portion 12 includes a refraction incident surface 121 and a refraction exit surface 122, the incident light enters the transmission incident surface 111 and the refraction incident surface 121, and exits from the transmission exit surface 112 through the transmission portion 11 to form a transmission light beam with a first energy distribution, the transmission light beam is refracted through the refraction portion 12 and exits from the refraction exit surface 122 to form a refraction light beam with a second energy distribution, and the transmission light beam and the refraction light beam are overlapped to form a light beam with a third energy distribution.

As shown in fig. 1 to 4, the optical element 10 includes a transmission portion 11, the transmission portion 11 includes a transmission incident surface 111 and a transmission exit surface 112, when an incident light enters the optical element 10, the incident light enters the transmission incident surface 111, and exits from the transmission exit surface 112 through the transmission portion 11 to form a transmission light beam with a first energy distribution, the optical element 10 further includes a refraction portion 12, the refraction portion 12 surrounds the transmission portion 11, the refraction portion 12 includes a refraction incident surface 121 and a refraction exit surface 122, when the incident light enters the optical element 10, the incident light enters the refraction incident surface 121, and exits from the refraction exit surface 122 through the refraction portion 12 to form a refraction light beam with a second energy distribution, and the above light beam and the refraction light beam are overlapped in a far field to form a transmission light beam with a third energy distribution.

As shown in fig. 1 to 4, since the optical element 10 includes the transmission part 11 and the refraction part 12, when an incident light enters the optical element 10, the incident light is divided into a plurality of parts, some parts are transmitted through the transmission part 11 and then emitted, a transmitted light beam with a first energy distribution is formed in a far field, some parts are refracted through the refraction part 12 and then emitted, a refracted light beam with a second energy distribution is formed in the far field, and the transmitted light beam and the refracted light beam formed by each part of the incident light are overlapped in the far field to form a light beam with a third energy distribution.

As shown in fig. 1 to 4, by providing only one optical element 10, the optical element 10 including the transmission part 11 and the refraction part 12, the incident light can be divided into a plurality of parts, thereby achieving the cutting of the incident light, the transmitted light beam and the refracted light beam formed by each part of the incident light respectively overlap in the far field to form a light beam with a third energy distribution, thereby achieving the rearrangement of the incident light, i.e., changing the energy distribution characteristic of the incident light, and the energy distribution characteristic of the incident light is not particularly limited, for example, the energy distribution of the incident light may be gaussian distribution, flat-top distribution, etc., and the form of the light beam with the formed third energy distribution may be diversified, for example, the formed third energy distribution may be flat-top distribution, half-flat-top distribution, medium-strength flat-top distribution, stepped flat-top distribution, light spot stripe separation type distribution, tower-overlapped double-gaussian type distribution, Gaussian distribution and the like, and has the advantages of high flexibility and high degree of freedom, thereby meeting different use requirements.

Alternatively, the refraction portion 12 is disposed around the transmission portion 11; or the refraction part 12 includes at least one sub-refraction part 123 connected to the transmission part 11.

For example, as shown in fig. 5 to 18, in some embodiments, the refraction portion 12 is a whole, and the refraction portion 12 is disposed around the transmission portion 11, in this case, the side surface connecting the refraction entrance surface 121 and the refraction exit surface 122 may be a circumferential surface, and the optical element 10 may be a closed rotation body structure (as shown in fig. 5 and 16) or a non-closed rotation body structure (or a partial rotation body structure, as shown in fig. 7, 9, 17 and 18) such as a cylinder or a cone, whose side surface is a circumferential surface; as shown in fig. 19 and 20, in other embodiments, the refraction portion 12 includes a sub-refraction portion 123 connected to the transmission portion 11, in which case, the side surface connecting the refraction entrance surface 121 and the refraction exit surface 122 may be a plane, and the optical element 10 may be a square structure whose side surface is a plane; as shown in fig. 21, 22, 27 and 28, in other embodiments, the refraction portion 12 includes a plurality of sub-refraction portions 123 connected to the transmission portion 11, the plurality of sub-refraction portions 123 are disposed at intervals around the transmission portion 11, that is, the plurality of sub-refraction portions 123 are not connected to each other, in this case, the side surface connecting the refraction entrance surface 121 and the refraction exit surface 122 may be a plane, and the optical element 10 may be a square structure with the side surface being a plane; as shown in fig. 23, 24, 29 and 30, in other embodiments, the refraction portion 12 includes a plurality of sub-refraction portions 123 connected to the transmission portion 11, the plurality of sub-refraction portions 123 are disposed around the transmission portion 11, and the plurality of sub-refraction portions 123 are sequentially connected to each other, in which case, the side surface connecting the refraction incident surface 121 and the refraction exit surface 122 may be a plane surface, and the optical element 10 may be a square structure whose side surface is a plane surface; as shown in fig. 25 and 26, in other embodiments, the refraction portion 12 includes a plurality of sub-refraction portions 123 connected to the transmission portion 11, the plurality of sub-refraction portions 123 are disposed around the transmission portion 11, wherein at least two sub-refraction portions 123 are disposed at intervals, and the other sub-refraction portions 123 are sequentially connected to each other, in this case, a side surface connecting the refraction incident surface 121 and the refraction exit surface 122 may be a plane, and the optical element 10 may be a square structure whose side surface is a plane. It should be understood that the foregoing is only some embodiments of the present invention, and the refractive portion and the transmissive portion are disposed in different forms according to the energy distribution requirement of the target beam and the spot shape requirement of the target beam, and those skilled in the art can flexibly combine and select according to the principle of the beam cutting rearrangement, and are not limited herein.

Alternatively, as shown in fig. 4, 13 to 15, and 35 to 38, at least one of the transmission incident surface 111, the transmission exit surface 112, the refraction incident surface 121, and the refraction exit surface 122 is provided with the microstructure 13 to achieve homogenization of incident light, transmitted light beams, or refracted light beams by the microstructure 13. For example, as shown in fig. 4 and 13, the refractive incident surface 121 is provided with the microstructures 13, as shown in fig. 14, the transmissive incident surface 111 and the refractive incident surface 121 are provided with the microstructures 13, as shown in fig. 15, the transmissive incident surface 111, the transmissive exit surface 112, the refractive incident surface 121 and the refractive exit surface 122 are provided with the microstructures 13, as shown in fig. 35, the transmissive incident surface 111 is provided with the microstructures 13, as shown in fig. 36 and 37, the transmissive incident surface 111, the transmissive exit surface 112 and the refractive exit surface 122 are provided with the microstructures 13, as shown in fig. 38, the transmissive exit surface 112 and the refractive exit surface 122 are provided with the microstructures 13.

In particular, the microstructures 13 comprise one-dimensional or two-dimensional concavities and/or convexities. Wherein the concave surfaces and/or the convex surfaces are regularly or irregularly arranged.

It should be noted that the microstructures disposed on the optical surface in the embodiments of the present application refer to microstructures in which the specific surface type or structure size of each constituent microstructure is on the millimeter scale, rather than the microstructures in the nanometer scale that implement light diffraction. It will be appreciated by those skilled in the art that the range of dimensions of the particular surface type or structure comprising the microstructure has a direct effect on the optical effect that the microstructure can perform when formed on the optical element is of millimeter-scale structure dimensions, the microstructure refracts the light beam as it passes through the microstructured surface of the optical element, and when the microstructure is of nanometer-scale structure dimensions, the microstructure diffracts the passing light beam as it passes through the microstructured surface of the optical element. The microstructures mentioned in the embodiments of the present application all refer to microstructures on the millimeter scale, and perform a refraction effect on a light beam passing through the microstructures.

It is understood that the foregoing are only some embodiments of the present invention, and different-shape microstructures may be disposed on at least one of the transmission incident surface, the transmission emergent surface, the refraction incident surface and the refraction emergent surface according to the requirement of the spot quality of the target beam, so as to homogenize the incident light, the transmission light beam or the refraction light beam through the microstructures. The skilled person can make a flexible combination selection according to the above principles, and the invention is not limited herein.

Alternatively, the transmission entrance surface 111, the transmission exit surface 112, the refraction entrance surface 121, and the refraction exit surface 122 are one of an inclined plane, an inclined convex surface, an inclined concave surface, a positive plane, a positive convex surface, and a positive concave surface with respect to a plane perpendicular to the optical axis direction, so that the energy distribution ranges of the transmitted light beam and the refracted light beam are correspondingly adjusted by changing the positional relationship (including inclination and parallelism) between at least one of the transmission entrance surface 111, the transmission exit surface 112, the refraction entrance surface 121, and the refraction exit surface 122 with respect to the plane perpendicular to the optical axis direction and/or the surface type (including a plane, a convex surface, or a concave surface) of the plane, so that the third energy distribution formed by superimposing the transmitted light beam and the refracted light beam has a superimposition characteristic with a higher degree of freedom.

In some embodiments, the transmission exit surface 112 and the refraction exit surface 122 are both a normal plane with respect to a plane perpendicular to the optical axis direction, as shown in fig. 6, 8, 10, 13 to 15, 20, 22, 24, 26, and 28, the transmission entrance surface 111 is a normal plane with respect to a plane perpendicular to the optical axis direction, the refraction entrance surface 121 is an oblique plane with respect to a plane perpendicular to the optical axis direction, as shown in fig. 11 and 30, the transmission entrance surface 111 is a normal plane with respect to a plane perpendicular to the optical axis direction, the refraction entrance surface 121 is an oblique convex surface with respect to a plane perpendicular to the optical axis direction, as shown in fig. 12, the transmission entrance surface 111 is a normal plane with respect to a plane perpendicular to the optical axis direction, the refraction entrance surface 121 is an oblique concave surface with respect to a plane perpendicular to the optical axis direction, as shown in fig. 31 and 35, the transmission entrance surface 111 is a normal concave surface with respect to a plane perpendicular to the optical axis direction, the refraction incident surface 121 is an oblique plane with respect to a surface perpendicular to the optical axis direction, and as shown in fig. 32 and 36, the transmission incident surface 111 is a positive convex surface with respect to a surface perpendicular to the optical axis direction, and the refraction incident surface 121 is an oblique plane with respect to a surface perpendicular to the optical axis direction.

In other embodiments, as shown in fig. 33 and 37, the transmission exit surface 112 and the refraction exit surface 122 are both positive convex surfaces with respect to the surface perpendicular to the optical axis direction, the transmission incident surface 111 is a positive plane with respect to the surface perpendicular to the optical axis direction, and the refraction incident surface 121 is an oblique plane with respect to the surface perpendicular to the optical axis direction; in other embodiments, as shown in fig. 34 and 38, the transmission exit surface 112 and the refraction exit surface 122 are both concave and convex surfaces with respect to the surface perpendicular to the optical axis direction, the transmission incident surface 111 is a plane surface with respect to the surface perpendicular to the optical axis direction, and the refraction incident surface 121 is an oblique plane surface with respect to the surface perpendicular to the optical axis direction.

In other embodiments, as shown in fig. 39, the transmission entrance surface 111 and the transmission exit surface 112 are both a normal plane with respect to a plane perpendicular to the optical axis direction, and the refraction entrance surface 121 and the refraction exit surface 122 are both an oblique plane with respect to a plane perpendicular to the optical axis direction; in other embodiments, as shown in fig. 40, the transmission incident surface 111 and the transmission emergent surface 112 are both positive planes with respect to the plane perpendicular to the optical axis direction, the refraction incident surface 121 of one sub-refraction portion 123 is an oblique concave surface with respect to the plane perpendicular to the optical axis direction, the refraction emergent surface 122 is an oblique plane with respect to the plane perpendicular to the optical axis direction, the refraction incident surface 121 of the other sub-refraction portion 123 is an oblique convex surface with respect to the plane perpendicular to the optical axis direction, and the refraction emergent surface 122 is an oblique plane with respect to the plane perpendicular to the optical axis direction; in other embodiments, as shown in fig. 41, the transmission entrance surface 111 and the transmission exit surface 112 are both positive convex surfaces with respect to the surface perpendicular to the optical axis direction, and the refraction entrance surface 121 and the refraction exit surface 122 are both oblique planes with respect to the surface perpendicular to the optical axis direction; in other embodiments, as shown in fig. 42, the transmission incident surface 111 is a front plane with respect to a surface perpendicular to the optical axis direction, the transmission exit surface 112 is a concave front surface with respect to a surface perpendicular to the optical axis direction, the refraction incident surface 121 is an inclined plane with respect to a surface perpendicular to the optical axis direction, and the refraction exit surface 122 is a front plane with respect to a surface perpendicular to the optical axis direction; in other embodiments, as shown in fig. 43, the transmission incident surface 111 and the transmission exit surface 112 are both a positive plane with respect to the surface perpendicular to the optical axis direction, the refraction incident surface 121 is an oblique plane with respect to the surface perpendicular to the optical axis direction, and the refraction exit surface 122 is a positive concave surface with respect to the surface perpendicular to the optical axis direction; in other embodiments, as shown in fig. 44, the transmission incident surface 111 is a normal plane with respect to a plane perpendicular to the optical axis direction, the transmission exit surface 112 is an oblique plane with respect to a plane perpendicular to the optical axis direction, and both the refraction incident surface 121 and the refraction exit surface 122 are oblique planes with respect to a plane perpendicular to the optical axis direction; in other embodiments, as shown in fig. 45, the transmission incident surface 111 is a normal plane with respect to a plane perpendicular to the optical axis direction, the transmission exit surface 112 is an oblique plane with respect to a plane perpendicular to the optical axis direction, the refraction incident surface 121 of one sub-refraction portion 123 is an oblique plane with respect to a plane perpendicular to the optical axis direction, the refraction exit surface 122 is a normal plane with respect to a plane perpendicular to the optical axis direction, the refraction incident surface 121 of the other sub-refraction portion 123 is a normal plane with respect to a plane perpendicular to the optical axis direction, and the refraction exit surface 122 is an oblique plane with respect to a plane perpendicular to the optical axis direction.

It is understood that, in the above embodiments of the present invention, according to the requirement of the energy distribution of the target light beam, the positional relationship (including inclination and parallelism) between at least one of the transmission incident surface, the transmission exit surface, the refraction incident surface and the refraction exit surface with respect to the surface perpendicular to the optical axis direction and/or the surface type (including a plane, a convex surface or a concave surface) of the surface may be set, the inclination angle of the plane may affect the position of the light beam on the receiving surface, and the concave surface or the convex surface may affect the range of the light beam on the receiving surface. The skilled person can make a flexible combination selection according to the above principles, without limitation.

Alternatively, the transmissive part 11 is provided as a through cavity or a light-permeable optical material, and those skilled in the art should be able to make reasonable selection and design according to the actual situation, and is not limited herein. Exemplarily, in some embodiments, as shown in fig. 5, 7, 9, 27 to 30, the transmission part 11 is provided as a through cavity; in other embodiments, as shown in fig. 16 to 18 and fig. 21 to 24, the transmissive portion 11 is provided as an optical material that is transmissive to light.

In summary, in the optical element 10 provided by the embodiment of the present invention, since the optical element 10 includes the transmission part 11 and the refraction part 12, the incident light can be divided into a plurality of parts, some of the parts are transmitted through the transmission part 11 and then emitted, the transmitted light beam with the first energy distribution is formed in the far field, some of the parts are refracted through the refraction part 12 and then emitted, the refracted light beam with the second energy distribution is formed in the far field, so as to realize the cutting of the incident light, the transmitted light beam and the refracted light beam formed by each part of the incident light respectively overlap in the far field to form the light beam with the third energy distribution, so as to realize the rearrangement of the incident light, that is, the energy distribution characteristic of the incident light is changed. This optical element 10 can cut and rearrange the light beam to change the distribution characteristic of light beam, and, do not have specific restriction to the energy distribution characteristic of incident light, can also make the light beam form of the third energy distribution who forms diversified, have the advantage that the flexibility is high, the degree of freedom is high, and then be applicable to different application scenarios, simultaneously, can also play the effect of homogenizing the light beam.

In a second aspect of the embodiments of the present invention, an optical module is provided, which can be applied to the fields of medical cosmetology, laser radar, industrial processing, and the like, and includes the optical element 10 described above. Since the structure of the optical element 10 and the advantages thereof have been described in detail above, they are not described herein again.

Optionally, the optical module further includes a lens 20 or a lens group disposed between the light source and the optical element 10, the lens 20 or the lens group is configured to collimate and/or compress the light beam emitted from the light source to form an incident light, and the incident light passes through the optical element 10 to form a light spot with a preset shape of a third energy distribution.

The light source may be a linear light source or a surface light source, and preferably, the light source is a laser light source, and those skilled in the art should be able to select and design the light source reasonably according to actual situations, and the light source is not limited herein. By adjusting the distance between the light source and the optical element 10, the width of the light beam incident on the transmission part 11 and the refraction part 12 from the light source can be adjusted correspondingly, so as to adjust the energy width of the transmitted light beam and the refracted light beam correspondingly, thereby adjusting the width of the formed light beam with the third energy distribution and the size of the superposition area correspondingly. Illustratively, when the light source is close to the optical element 10, the energy width of the transmitted beam is wide and the energy width of the refracted beam is narrow; when the light source is far from the optical element 10, the energy width of the transmitted light beam is narrow and the energy width of the refracted light beam is wide.

The lens 20 or the lens group is disposed between the light source and the optical element 10, and is configured to collimate and/or compress the light beam emitted from the light source to form incident light, for example, the lens 20 or the lens group may be a collimating mirror or a collimating lens group; alternatively, the lens 20 or lens group may be a compressed mirror or a compressed lens group. By providing the lens 20 or the lens group between the light source and the optical element 10, the width of the light beam incident on the refraction portion 12 can be adjusted correspondingly to adjust the energy width of the refracted light beam correspondingly, so that the width of the light beam of the formed third energy distribution and the size of the superimposed area can be adjusted correspondingly. Exemplarily, when the lens 20 or the lens group is disposed between the light source and the optical element 10, the energy width of the refracted light beam is narrow; when the lens 20 or the lens group is not provided between the light source and the optical element 10, the energy width of the refracted light beam is wide.

The optical element 10 includes a transmission part 11 and a refraction part 12, and by adjusting the size of the light transmission area of the transmission part 11 and/or the refraction part 12, the width of the light beam incident on the transmission part 11 and the refraction part 12 can be correspondingly adjusted to correspondingly adjust the energy widths of the transmitted light beam and the refracted light beam, so that the width of the formed light beam of the third energy distribution and the size of the superposition area can be correspondingly adjusted. Illustratively, when the light-passing area of the transmission part 11 is large and the light-passing area of the refraction part 12 is small, the energy width of the transmitted light beam is wide and the energy width of the refracted light beam is narrow; when the light-transmitting area of the transmitting portion 11 is small and the light-transmitting area of the refracting portion 12 is large, the energy width of the transmitted light beam is narrow and the energy width of the refracted light beam is wide.

When the refraction incident surface 121 and the refraction exit surface 122 are one of an inclined plane, an inclined convex surface and an inclined concave surface relative to the surface perpendicular to the optical axis direction, that is, the position relationship between at least one of the refraction incident surface 121 and the refraction exit surface 122 relative to the surface perpendicular to the optical axis direction is an inclined condition, by adjusting the size of the included angle between the two surfaces, the size of the deflection angle of the light beam emitted after the incident light is incident through the refraction incident surface can be correspondingly adjusted, so as to correspondingly adjust the size of the deflection angle of the refraction light beam, and thus the width of the formed light beam with the third energy distribution and the size of the superposition area can be correspondingly adjusted. Illustratively, when the included angle between two surfaces is larger, the deflection angle of the refracted light beam is smaller; when the angle between the two surfaces is small, the deflection angle of the refracted light beam is large.

When the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121, and the refraction emergent surface 122 are one of a plane, a convex surface, and a concave surface with respect to the surface perpendicular to the optical axis direction, that is, the size of the included angle between the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121, and the refraction emergent surface 122 with respect to the surface perpendicular to the optical axis direction is not considered at this time, and only the surface type of the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121, and the refraction emergent surface 122 is considered, the width of the light beam passing through the surface can be adjusted correspondingly to reduce the size of the energy width of the light beam passing through the surface, so that the width of the light beam forming the third energy distribution and the size of the overlapping area can be correspondingly reduced. For example, when the surface of the surface is a convex surface, the light beam passing through the surface is converged or converged and then diffused, and the energy width of the light beam passing through the surface is narrowed or widened; when the surface of the surface is a concave surface, the light beam passing through the surface is diffused, and the energy width of the light beam passing through the surface is widened.

As described above, the effect of forming the light spot having the predetermined shape of the third energy distribution is related to the distance between the light source and the optical element 10, whether the lens 20 or the lens group is disposed between the light source and the optical element 10, the size of the light transmission region of the transmission portion 11 and the refraction portion 12, the size of the included angle between the refraction incident surface 121 and the refraction exit surface 122 with respect to the surface perpendicular to the optical axis direction (when the positional relationship between the two surfaces is parallel, the included angle between the two surfaces is considered to be 0 °), and the surface types of the transmission incident surface 111, the transmission exit surface 112, the refraction incident surface 121, and the refraction exit surface 122, and in addition to the material of the refraction portion 12, by adjusting the above-mentioned influence factors, a medium-intensity light spot, a flat-top light spot, or a segmented light spot in the angular space, the planar space, and the polar coordinate can be reasonably selected and designed by those skilled in the art according to the actual situation, and is not particularly limited herein.

Illustratively, when the optical element 10 is a closed solid of revolution structure (as shown in fig. 5 and 16) or a completely symmetrical structure (as shown in fig. 21, 23, 27 and 29), it is possible to form a light beam having a third energy distribution as shown in fig. 46 to 50 by cutting and rearranging, wherein, as shown in fig. 46 to 48, the light source is a laser light source, and in this case, the energy distribution of the incident light is gaussian, and has a characteristic that the central portion is strong and the two sides are weak, and by adjusting the above-mentioned influence factors (for example, the size of the included angle between the refraction incident surface 121 and the refraction exit surface 122 with respect to the plane perpendicular to the optical axis direction and/or the difference in the material of the refraction portion 12, that is, according to the difference in the refractive index of the refraction portion 12), it is possible to form a light beam having a third energy distribution as shown in fig. 46 to 48, for example, as shown in fig. 46, machining (cladding) a laser industrial surface, In applications such as laser depilation and partial laser radar (Lidar), a beam with a third energy distribution having a flat-top energy distribution can be formed by the optical element 10, as shown in fig. 47, in applications such as a low-cost laser Lidar emission source, a beam with a third energy distribution having a flare-fringe separation type energy distribution can be formed by the optical element 10, that is, a gaussian peak top region is reserved in the middle (a scanning mirror can be added to form a scanning output field in the region), meanwhile, the two side separated beam regions are directly projected to both sides of a road for the purpose of predetermination and identification of a moving object which may intrude into the outside of the road, as shown in fig. 48, a beam with a third energy distribution having a tower-like superimposed double-gaussian energy distribution can be formed by the optical element 10, so as to be suitable for applications such as insufficient force of the Lidar emission source due to weather of rain, fog and haze, The emergency laser Lidar emitting source carried when the detection distance is too short can improve the penetrating power and the detection distance by the characteristic of strong energy density in the middle, and can be also suitable for industrial processing cutting or drilling, the region with strong energy density in the middle participates in cutting to vaporize a workpiece, meanwhile, the material on two sides of the cutting part is quenched by the regions with low energy density on two sides to change the characteristic of the material, so that the hardness of the cut surface after cutting is enhanced, as shown in fig. 49 and 50, the energy distribution of incident light is flat-top distribution, and the light beam with the third energy distribution as shown in fig. 49 and 50 can be correspondingly formed by adjusting the above influence factors, for example, as shown in fig. 49, the light beam with the third energy distribution with medium-strong flat-top distribution can be formed by the optical element 10 to be used for the middle-high end laser Lidar emitting source, as shown in fig. 50, for end-pumped pumping application, when a resonant cavity of a flat-concave cavity or a concave-concave cavity is formed, a pump source beam needs to be in gaussian distribution, and at this time, a beam with third energy distribution with gaussian distribution energy distribution can be formed through the optical element 10 to improve the absorption efficiency of a crystal (gain medium) so as to improve the energy intensity of pumping output, generally, a slow-axis distribution near field of a semiconductor laser is close to a flat top, and a near region is close to the flat top, and pumping is performed after the flat-top beam is converted into the gaussian beam in the slow-axis direction; when the optical element 10 is a non-closed solid of revolution structure (as shown in fig. 7, 9, 17 and 18) or a non-completely symmetrical structure (as shown in fig. 19 and 25), it is able to form a light beam with a third energy distribution as shown in fig. 51 and 52 by cutting and rearranging, wherein, as shown in fig. 51, the light beam is defined and distributed by an angular space, and at this time, the energy distribution of the incident light is gaussian distribution, and as shown in fig. 10, the light beam with the third energy distribution whose energy distribution is half flat top distribution can be formed by the optical element 10, and by converting the gaussian distribution into half flat top distribution, more energy can be concentrated in the energy region of the far-reaching light, so as to be suitable for the laser Lidar or the automobile high beam, and avoid the phenomenon of energy reduction of the far-reaching light caused by too much energy directly irradiating the ground, as shown in fig. 52, the light beam is defined and distributed by the angular space, and at this time, the energy distribution of the incident light is flat top distribution, the optical element 10 can form a light beam with a third energy distribution with a step-flat top distribution for scanning detection of the sweeping robot.

The light beam emitted from the light source is collimated and/or compressed by the lens 20 or the lens group to form the incident light, and the incident light enters the optical element 10, which includes the following conditions: first, as shown in fig. 53, after the incident light is collimated in the fast axis and/or slow axis direction, the cutting rearrangement occurs in one direction, that is, the incident transmission incident surface 111 and the refraction incident surface 121 in the direction, and the light is emitted from the transmission emergent surface 112 through the transmission part 11 to form a transmission beam with a first energy distribution, and is reflected through the refraction part 12 to be emitted from the refraction emergent surface 122 to form a refraction beam with a second energy distribution, and the light spots with a third energy distribution are formed by superposition in the far field; secondly, after the incident light is compressed in the fast axis and/or slow axis direction (as shown in fig. 54) or directly incident (as shown in fig. 55), the incident light is cut and rearranged in two directions, i.e. the incident transmission incident surface 111 and the refraction incident surface 121 in the two directions are respectively emitted from the transmission emergent surface 112 through the transmission part 11 to form a transmission beam with a first energy distribution, and the transmission beam is refracted through the refraction part 12 to form a refraction beam with a second energy distribution through the refraction emergent surface 122, and the transmission beam and the refraction incident surface are superposed in the far field to form a surface light spot with a third energy distribution, wherein the surface light spot comprises a light spot shape such as a square, a circle, an ellipse, and the like. The surface light spot in fig. 54 and 55 is for illustrative purposes only, and is not intended to limit the specific shape of the surface light spot.

Furthermore, according to the practical application requirement, the optical elements can be combined, when the optical elements are combined, the same optical elements can be combined, or different optical elements can be combined, and the number and the combination position of the optical elements are not limited.

In a third aspect of the embodiments of the present invention, there is provided a beam shaping method using the optical element 10, the method including:

s100, a transmission incident surface 111 of the incident light incident transmission part 11 and a refraction incident surface 121 of the refraction part 12;

s200, a transmission light beam which forms a first energy distribution is emitted from the transmission emitting surface 112 through the transmission part 11;

s300, forming a second energy distribution refraction beam by being refracted by the refraction part 12 and then being emitted from the refraction emitting surface 122;

and S400, overlapping the transmitted light beam and the refracted light beam to form a light beam with a third energy distribution.

When incident light enters the optical element 10, the optical element 10 includes the transmission part 11 and the refraction part 12, so that the incident light is divided into a plurality of parts, some parts are transmitted through the transmission part 11 and then emitted, a transmitted light beam with a first energy distribution is formed in a far field, some parts are refracted through the refraction part 12 and then emitted, a refracted light beam with a second energy distribution is formed in the far field, so that the incident light is cut, the transmitted light beam and the refracted light beam which are respectively formed by each part of the incident light are overlapped in the far field to form a light beam with a third energy distribution, so that the incident light is rearranged, namely, the energy distribution characteristics of the incident light are changed, and the step of shaping the light beam by applying the optical element 10 is completed.

Optionally, at least one of the transmissive incident surface 111, the transmissive emergent surface 112, the refractive incident surface 121, and the refractive emergent surface 122 is provided with the microstructure 13, and the method includes:

s110, incident light entering the transmission incident surface 111 of the transmission part 11 and the refraction incident surface 121 of the refraction part 12, or a transmitted light beam which passes through the transmission part 11 and is emitted from the transmission exit surface 112 to form a first energy distribution, or a refracted light beam which passes through the refraction part 12 and is emitted from the refraction exit surface 122 to form a second energy distribution, and the light beam is homogenized by the microstructure.

According to the actual light spot index requirement, when the microstructure 13 is arranged on at least one of the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121 and the refraction emergent surface 122 of the optical element 10, the microstructure 13 can homogenize the incident light, the transmitted light beam or the refraction light beam, so that the effect of homogenizing the light beam can be achieved.

Optionally, at least one of the transmission entrance surface 111, the transmission exit surface 112, the refraction entrance surface 121, and the refraction exit surface 122 is an oblique convex surface or a positive convex surface with respect to a surface perpendicular to the optical axis direction, and the method includes:

s120, incident light entering the transmission incident surface 111 of the transmission part 11 and the refraction incident surface 121 of the refraction part 12, or a transmitted light beam emitted from the transmission exit surface 112 through the transmission part 11 to form a first energy distribution, or a refracted light beam emitted from the refraction exit surface 122 after being refracted through the refraction part 12 to form a second energy distribution is converged by an oblique convex surface or a positive convex surface, or is converged and then diffused.

According to the actual spot index requirement, when at least one of the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121, and the refraction emergent surface 122 of the optical element 10 is an oblique convex surface or a positive convex surface relative to a surface perpendicular to the optical axis direction, the light beam passing through the surface can be converged or converged and then diffused through the oblique convex surface and the positive convex surface, the energy width of the light beam passing through the surface can be narrowed or widened, and the width of the formed light beam with the third energy distribution and the size of the overlapping area can be correspondingly adjusted.

Optionally, at least one of the transmission incident surface 111, the transmission exit surface 112, the refraction incident surface 121, and the refraction exit surface 122 is a slanted concave surface or a regular concave surface with respect to a surface perpendicular to the optical axis direction, and the method includes:

s130, the incident light entering the transmission incident surface 111 of the transmission part 11 and the refraction incident surface 121 of the refraction part 12, or the transmitted light beam which is emitted from the transmission exit surface 112 through the transmission part 11 to form the first energy distribution, or the refracted light beam which is emitted from the refraction exit surface 122 after being refracted through the refraction part 12 to form the second energy distribution is diffused through the oblique convex surface or the positive convex surface.

According to the actual spot index requirement, when at least one of the transmission incident surface 111, the transmission emergent surface 112, the refraction incident surface 121, and the refraction emergent surface 122 of the optical element 10 is a concave surface or a concave surface, the light beam passing through the surface can be diffused by the concave surface or the concave surface, and the energy width of the light beam passing through the surface can be widened, so that the width of the formed light beam with the third energy distribution and the size of the overlapping area can be adjusted correspondingly.

In a fourth aspect of the embodiments of the present invention, a method for shaping a light beam by using the optical module is provided, where the method includes:

s150, collimating and/or compressing the light beam emitted by the light source through a lens 20 or a lens group arranged between the light source and the optical element 10 to form incident light;

s250, the incident light enters the transmission incident surface 111 of the transmission part 11 and the refraction incident surface 121 of the refraction part 12;

s350, a transmission light beam which forms a first energy distribution is emitted from the transmission emitting surface 112 through the transmission part 11;

s450, forming a second energy distribution refraction beam by being refracted by the refraction part 12 and then being emitted from the refraction emitting surface 122;

and S550, superposing the transmitted beam and the refracted beam to form a light spot with a third energy distribution in a preset form.

The light beam emitted by the light source of the optical module is collimated and/or compressed by the lens 20 or the lens group to form incident light, the incident light enters the optical element 10 to form a medium-intensity light spot, a flat-top light spot or a segmented light spot under an angular space, a plane space and a polar coordinate, the shape of the light spot can be selected along with the lens or the lens group, the distance between the light source and the lens or the lens group is set, and the optical element 10 is set, so that the change of the shapes of the light spots such as a linear light spot, a plane light spot and a circular light spot is realized, and the optical module has the advantages of high flexibility and high degree of freedom, thereby meeting different use requirements.

The above description is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention may occur to 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.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

Claims

1. The utility model provides an optical element, its characterized in that, optical element includes transmission portion and refraction portion, the refraction portion encloses to be located transmission portion, transmission portion is including transmission incident surface and transmission emergent surface, refraction portion is including refraction incident surface and refraction emergent surface, and incident light is incided transmission incident surface and refraction incident surface, and pass through transmission portion by transmission emergent surface outgoing forms the transmission light beam of first energy distribution, pass through behind the refraction portion refraction by refraction emergent surface outgoing forms the refraction light beam of second energy distribution, transmission light beam with the light beam superposition of refraction forms the light beam of third energy distribution.

2. The optical element according to claim 1, wherein the refractive portion is provided around the transmissive portion; or the refraction part comprises at least one sub-refraction part connected with the transmission part.

3. The optical element according to claim 1, wherein at least one of the transmissive entrance surface, the transmissive exit surface, the refractive entrance surface and the refractive exit surface is provided with a microstructure.

4. An optical element as recited in claim 3, wherein said microstructures comprise one or two dimensional concave and/or convex surfaces.

5. An optical element as recited in claim 4, wherein said concave and/or convex surfaces are regularly or irregularly arranged.

6. The optical element according to claim 1, wherein the transmission incident surface, the transmission exit surface, the refraction incident surface, and the refraction exit surface are one of an inclined plane, an inclined convex surface, an inclined concave surface, a front plane, a front convex surface, and a front concave surface with respect to a plane perpendicular to the optical axis direction.

7. An optical element according to claim 1, wherein the transmissive portion is provided as a through cavity or a light transmissive optical material.

8. An optical module comprising an optical element according to any one of claims 1 to 7.

9. The optical module according to claim 8, further comprising a lens or a lens group disposed between the light source and the optical element, wherein the lens or the lens group is configured to collimate and/or compress the light beam emitted from the light source to form an incident light, and the incident light forms a light spot with a predetermined shape of a third energy distribution after passing through the optical element.

10. A method of beam shaping using the optical element according to any one of claims 1 to 7, the method comprising:

a transmission incident surface of the incident light incident transmission part and a refraction incident surface of the refraction part;

a transmitted beam emitted from the transmission emission surface through the transmission part to form a first energy distribution;

the second energy distribution refracted beam is formed by the refraction of the refraction part and the exit of the refraction exit surface;

the transmitted beam and the refracted beam are superimposed to form a beam of a third energy distribution.

11. The method of claim 10, wherein at least one of the transmissive entrance surface, the transmissive exit surface, the refractive entrance surface, and the refractive exit surface is provided with microstructures, the method comprising:

the incident light of the transmission incident surface of the incident transmission part and the refraction incident surface of the refraction part is emitted from the transmission emergent surface through the transmission part to form a transmission light beam with first energy distribution, or is emitted from the refraction emergent surface after being refracted by the refraction part to form a refraction light beam with second energy distribution, and the homogenization is carried out through the microstructure.

12. The beam shaping method according to claim 10, wherein at least one of the transmission incident surface, the transmission exit surface, the refraction incident surface, and the refraction exit surface is an oblique convex surface or a positive convex surface with respect to a surface perpendicular to the optical axis direction, the method comprising:

the incident light of the transmission incident plane of incident transmission portion and the refraction incident plane of refraction portion, or pass through the transmission portion by the transmission exit surface outgoing forms the transmission light beam of first energy distribution, or pass through behind the refraction portion refraction by the refraction exit surface outgoing forms second energy distribution refraction light beam and passes through oblique convex surface or positive convex surface converge, or diffuse again after converging.

13. The beam shaping method according to claim 10, wherein at least one of the transmission incident surface, the transmission exit surface, the refraction incident surface, and the refraction exit surface is a slant concave surface or a positive concave surface with respect to a surface perpendicular to the optical axis direction, the method comprising:

the transmission incident surface of the incident transmission part and the incident light of the refraction incident surface of the refraction part, or the transmission part and the transmission emergent surface are used for emitting and forming a transmission light beam with first energy distribution, or the refraction part is used for refracting and then emitting and forming a refraction light beam with second energy distribution, and the refraction light beam is diffused through the inclined concave surface or the positive concave surface.

14. A method of beam shaping using the optical module of claim 9, the method comprising:

the light beam emitted by the light source is collimated and/or compressed through a lens or a lens group arranged between the light source and the optical element to form incident light;

a transmitted beam which forms a first energy distribution and is emitted from the transmission emergent surface through the transmission part;

and the transmitted light beam and the refracted light beam are superposed to form a light spot with a third energy distribution in a preset form.