CN210323601U - Optical components and light source modules - Google Patents

Abstract

The utility model discloses an optical assembly and light source module, optical assembly includes at least: the laser device comprises a first optical element and a second optical element, wherein the first optical element at least comprises a first reflecting surface, the second optical element at least comprises a second reflecting surface, and the first reflecting surface and/or the second reflecting surface are/is used for enabling laser light incident to an optical assembly to form separate different laser light so as to realize the shaping of the laser light. Based on the technical scheme provided by the utility model, can realize the plastic to the light beam with the mode of reflection in a set of optical assembly, simple structure, the volume is less, easily modularization.

Description

Optical assembly and light source module

Technical Field

The utility model relates to a laser beam plastic field especially relates to an optical assembly and light source module.

Background

In the prior art, the existing beam shaping methods are mainly classified into three types, and the fast and slow axes of the beam are processed (for example, cut and rearranged) by a reflection type, a refraction type and a refraction and reflection mixed type, and part of the schemes are as follows:

for example, patent 200710056218.9 discloses a beam shaping device for an area array semiconductor laser, which combines reflection and refraction to cut and rearrange the beam by a step prism and two sets of parallelepiped prisms. The stepped prism of the scheme has the advantages of high processing difficulty, more required shaping elements, complex system and high installation and adjustment difficulty.

Patent 201510271420.8 discloses a total reflection-based semiconductor laser beam splitting rearrangement device, which is implemented by two sets of mutually perpendicular prism stacks, and the system has a large volume, is not easy to adjust, and cannot be applied to a semiconductor laser area array.

Therefore, no matter which method is adopted, the cutting and the rearrangement of the light beams are carried out in a large number of elements with complex structures, the volume of the system is increased, the system integration is not facilitated, and the processing difficulty and the assembly and adjustment difficulty are higher.

Disclosure of Invention

In view of this, an object of the present invention is to provide an optical assembly and a light source module, which can realize the shaping, especially the cutting rearrangement, of a light beam by a reflective manner without changing the propagation direction of the light beam through a set of optical assemblies having two identical optical elements, and have a simple structure, and two identical optical elements are directly stacked only in the thickness, so that the whole optical system has a small volume and is simple to assemble and adjust, and the requirement of the whole system for miniaturization and integrated design can be fully satisfied.

The technical scheme of the utility model is realized like this:

an embodiment of the utility model provides an optical assembly includes first optical element, second optical element at least, wherein, first optical element includes first plane of reflection at least, second optical element includes the second plane of reflection at least, first plane of reflection and/or second plane of reflection are used for making the laser of incidenting to optical assembly form the different laser of separation.

In the above scheme, the first reflecting surface has a first inclination angle, and the second reflecting surface has a second inclination angle.

In the above scheme, the first inclination angle and the second inclination angle are opposite in direction.

In the above scheme, the first inclination angle and the second inclination angle have the same size.

In the above aspect, the first optical element further includes: a first incident surface, a first transmission surface and a first emergent surface; the second optical element further includes: a second transmission surface and a second emergent surface; the laser enters the first optical element through the first incident surface to the first reflecting surface to form separated first laser and second laser; the first laser is reflected to the first transmission surface through the first reflection surface, enters the second optical element through the first transmission surface and the second transmission surface, enters the second reflection surface, and is reflected to the second emergence surface by the second reflection surface to be emergent; the second laser is emitted through the first emitting surface.

In the above scheme, the first transmission surface and the second transmission surface are arranged in parallel, and at least one of the opposite surfaces of the first transmission surface and the second transmission surface is plated with an antireflection film.

In the above solution, the first optical assembly and the second optical assembly have the same or different structures, and are stacked on each other.

In the above scheme, the first optical element and the second optical element are integrated or separated.

In the above scheme, the first optical element and/or the second optical element is a right-angle trapezoidal prism.

The embodiment of the utility model provides a still provide a light source module, light source module includes above-mentioned optical assembly, laser source; the optical assembly is arranged in the light emitting direction of the laser light source, and the size of the optical assembly is matched with the size of laser emitted by the laser light source.

Drawings

Fig. 1 is a schematic structural diagram of a first optical element or a second optical element according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an optical assembly according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an optical path of an optical assembly according to an embodiment of the present invention;

fig. 4 is a schematic view of the light source module in the fast axis direction according to the present invention;

FIG. 5 is a schematic view of the light source module in the slow axis direction according to the present invention;

fig. 6 is a comparison diagram of the optical assembly of the present invention before and after shaping the light spot.

The reference numbers illustrate: reference numeral 1 denotes a laser light source, 2 denotes a fast axis collimator, 3 denotes a slow axis collimator, 4 denotes a first optical element, 41 denotes a first incident surface, 42 denotes a first reflecting surface, 43 denotes a first transmitting surface, 44 denotes a first emitting surface, 5 denotes a second optical element, 51 denotes a second transmitting surface, 52 denotes a second reflecting surface, 53 denotes a second emitting surface, a denotes a first laser beam, and b denotes a second laser beam.

Detailed Description

The utility model discloses an optical assembly and light source module just can realize the plastic to the fast axle of laser beam and slow axle simultaneously through a set of optical assembly, and especially laser beam's cutting and rearrangement have thoroughly solved traditional optics scheme device structure complicacy, and device quantity is numerous and diverse, is difficult to realize the problem of integration and miniaturization, especially can be applied to area array type laser source.

Preferably, the optical assembly is composed of at least 2 identical optical elements stacked (e.g., stacked in the thickness direction), although the number of optical elements may be increased as appropriate. In the embodiment of the present invention, the optical assembly is preferably composed of 2 identical first optical elements and second optical elements, and the following description will be given to the present embodiment by way of example.

It should be noted that, in all the embodiments of the present invention, "first" and "second" are only used to distinguish one another, and do not constitute a specific limitation, for example, the definition related to "first … …", may also be defined as "second … …", the definition related to "second … …", and may also be defined as "first … …"; in addition, in some special cases, for example, in some special scenes where the requirements on the quality and the shape of the light spot are not high or the light spot is not high, the first optical element and the second optical element may be different, for example, the structure and/or the shape and/or the inclination angle of a certain surface are different.

Furthermore, the first optical element and the second optical element in the embodiment of the present invention may be integrated or separated. When a unitary element is used, the first optical element is a portion of the unitary element that performs the same or similar function, and the second optical element is another portion of the unitary element that performs the same or similar function. When the first optical element and the second optical element are a single piece, the equivalent alternatives that belong to the first optical element and the second optical element being separate should be included in the disclosure and protection scope of the present invention.

In an embodiment of the present invention, the first optical element includes at least a first reflection surface, the second optical element includes at least a second reflection surface, and the first reflection surface and/or the second reflection surface enable laser incident to the optical assembly to form separate different laser beams, so that the laser beams generate displacement (horizontal and/or vertical direction) when finally emitted, thereby realizing laser beam shaping, such as cutting rearrangement.

Preferably, the first optical element and the second optical element of the present invention may include, but are not limited to, right trapezoid prisms, and the following embodiments are exemplified by the case where the first optical element and the second optical element are both right trapezoid prisms (considering that the right trapezoid is a regular shape which is easy to produce and process), and in the case of realizing similar functions, optical devices with other shapes or structures (for example, changing a certain angle or size or shape) should be considered to be within the disclosure or protection scope of the present patent.

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a first optical element or a second optical element according to an embodiment of the present invention, as shown in fig. 1, and taking a schematic illustration of a first optical element 4 as an example (a second optical element 5 is similar and not repeated), where the first optical element 4 includes: a first incident surface 41, a first reflecting surface 42, a first transmitting surface 43, and a first exit surface 44, the second optical element including: a second transmission surface 51, a second reflection surface 52, and a second emission surface 53.

Specifically, the first reflecting surface has a first inclination angle, the second reflecting surface has a second inclination angle, reference surfaces of the first inclination angle and the second inclination angle can be selected according to actual conditions, specific values of the first inclination angle and the second inclination angle need to be calculated according to an incident angle and a light path of laser, and on the premise that the technical purpose of the application can be achieved, the inclination angle can be a series of values between 0 degrees and 180 degrees and is not unique.

For example, the first reflective surface 42 has a first inclination angle with respect to the first transmissive surface 43, and the second reflective surface 52 has a second inclination angle with respect to the second transmissive surface 51, and preferably, the first inclination angle is opposite to the second inclination angle (specifically, the opening direction of the first inclination angle is opposite to the opening direction of the second inclination angle), and has the same magnitude, which means that the first reflective surface 42 and the second reflective surface 52 are parallel to each other.

In the embodiment of the present invention, first transmission face 43 and second transmission face 51 parallel arrangement to first transmission face 43 and second transmission face 51 have plated the antireflection coating to at least one of them for two relative faces, wherein, two relative faces can contact the laminating completely, also can have partial space.

Further, at least one of the first reflecting surface 42 and the second reflecting surface 52 is coated with a high reflective film for sufficiently reflecting the laser beam.

Fig. 2 is a schematic structural diagram of an optical assembly according to an embodiment of the present invention, and the optical assembly shown in fig. 2 is formed by stacking a first optical element 4 and a second optical element 5 having the same structure, size, and shape in a direction perpendicular to an optical path, that is, a thickness direction of the first optical element 4 and the second optical element 5.

Fig. 3 is a schematic optical path diagram of an optical assembly according to an embodiment of the present invention, as shown in fig. 3, taking an example that the second optical element 5 is stacked above the first optical element 4, and the first optical element 4 is located on the main optical path, laser light emitted by the laser light source 1 enters the first optical element 4 through the first incident surface 41 of the first optical element 4 to form a first laser light a and a second laser light b, which are separated, wherein the first laser light a is reflected to the first transmission surface 43 through the first reflection surface 42, enters the second optical element 5 through the first transmission surface 43 through the second transmission surface 51, enters the second reflection surface 52, is reflected to the second emission surface 53 through the second reflection surface 52, and the second laser light b is emitted through the first emission surface 44.

Further, the second laser light emitted through the first emission surface 44 and the laser light emitted through the second emission surface 53 are parallel to each other, and the first laser light a emitted through the second optical element after being reflected by the first reflection surface 42 is displaced in both the horizontal and vertical directions with respect to the second laser light b emitted through the first optical element.

Fig. 4 is the utility model discloses the schematic diagram of the fast axle direction of light source module, fig. 5 is the utility model discloses the schematic diagram of the slow axle direction of light source module can be seen from by fig. 4, fig. 5, just can realize cutting and rearrangement to a beam of laser fast axle and slow axle light beam through a set of optical assembly to the direction of propagation does not change.

The embodiment of the utility model provides a still provide a light source module, light source module includes above optical component, laser light source, optical component sets up on laser light source's light-emitting direction, optical component's size with the size phase-match of laser light source transmission laser, the preferred bar class laser light source of laser light source.

The optical assembly is arranged in the light outgoing direction of the laser light source, and the size (such as thickness, width and the like) of the optical assembly is matched with the size of the laser light emitted by the laser light source, so that the laser light can fully enter the optical assembly, and energy loss is avoided; the inclination angles of the reflecting surfaces of the first optical element and the second optical element are designed to meet the requirement that the light beams are fully reflected on the first reflecting surface, and the second reflecting surface can completely receive the reflected light.

When the laser light source is an area array including a plurality of sub light sources, the cutting and rearrangement of the whole area array type light source can be realized only by arranging corresponding optical components in the light emitting direction of each sub light source, the number of the optical components corresponds to the number of the sub light sources in the area array, as shown in fig. 4, fig. 4 shows a case where the area array type light source includes 2 sub light sources.

Further, according to the conditions of the divergence angle of the laser emitted by the laser source and the like, the fast axis collimating mirror 2 and/or the slow axis collimating mirror 3 can be sequentially arranged between the optical component and the laser source, and similarly, the size of the optical component is matched with the size of the laser passing through the fast axis collimating mirror 2 and/or the slow axis collimating mirror 3, so that the laser can fully enter the optical component, and the energy loss is avoided.

In the embodiments of the present invention, the material of the first optical element and/or the second optical element includes, but is not limited to, K9 glass, fused silica, etc., and the size and/or angle of the first optical element and/or the second optical element are not limited to those described in the present application.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Various modifications and changes 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.

Claims (10)

1. An optical assembly comprising at least a first optical element and a second optical element, wherein,

the first optical element comprises at least a first reflecting surface, the second optical element comprises at least a second reflecting surface, and the first reflecting surface and/or the second reflecting surface are/is used for enabling laser light incident to the optical assembly to form separate different laser light.

2. The optical assembly of claim 1, wherein the first reflective surface has a first oblique angle and the second reflective surface has a second oblique angle.

3. The optical assembly of claim 2, wherein the first oblique angle is opposite to the second oblique angle.

4. The optical assembly of claim 2, wherein the first and second tilt angles are the same magnitude.

5. The optical assembly of claim 1, wherein the first optical element further comprises: a first incident surface, a first transmission surface and a first emergent surface; the second optical element further includes: a second transmission surface and a second emergent surface; the laser enters the first optical element through the first incident surface to the first reflecting surface to form separated first laser and second laser; wherein,

the first laser is reflected to the first transmission surface through the first reflection surface, enters the second optical element through the first transmission surface and the second transmission surface, enters the second reflection surface, and is reflected to the second emergence surface by the second reflection surface to be emergent; the second laser is emitted through the first emitting surface.

6. The optical assembly of claim 5, wherein the first and second transmissive surfaces are disposed in parallel, and at least one of the opposing surfaces is coated with an antireflection coating.

7. An optical assembly according to claim 1, wherein the first and second optical assemblies are of the same or different construction and are arranged one above the other.

8. An optical assembly according to any one of claims 1 to 7, wherein the first and second optical elements are unitary or separate.

9. An optical assembly according to claim 8, wherein the first and/or second optical elements are right angle trapezoidal prisms.

10. A light source module comprising the optical assembly of any one of claims 1 to 9, a laser light source; the optical assembly is arranged in the light emitting direction of the laser light source, and the size of the optical assembly is matched with the size of laser emitted by the laser light source.

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