Rectangular optical system and rectangular laser transmitter

Abstract

The utility model relates to a rectangular optical system and a rectangular laser transmitter. The rectangular optical system comprises a laser source used for emitting laser; the laser collimation piece is arranged at the laser emitting end of the laser source so as to focus the laser into collimated laser, and the laser collimation piece at least comprises a first plano-convex lens and a second plano-convex lens which are sequentially arranged on a laser path; and the rectangular array mirror is arranged at the laser emitting end of the laser collimation piece so as to emit the incident collimation laser into a rectangular light spot. According to the utility model, laser is collimated and emitted into rectangular light spots, light focusing and overall uniform emission are realized, the accuracy and the stability of laser irradiation are improved, and the device is suitable for multiple fields of medical treatment, manufacturing and the like, and has relatively high practicability and economical efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of rectangular laser emitters, in particular to a rectangular optical system and a rectangular laser emitter. Background Art

[0002] In modern science and technology, laser technology is widely used in numerous fields, including medicine, communications, and manufacturing. With the widespread adoption of lasers in both civilian and military applications, their advantages, such as small size, light weight, high efficiency, and excellent reliability, have led to their widespread application in civilian fields such as surface treatment, 3D printing, medicine, and engraving. However, the beams currently produced by laser systems are mostly circular in cross-section and suffer from issues such as uneven light sources, high energy consumption, and limited effectiveness in certain specific applications.

[0003] For example, in material surface treatment, rectangular light spots are used to quench the surface of metal materials, which can precisely control the shape and size of the treated area and improve the hardness and wear resistance of the material surface. In 3D printing, in 3D printing technologies such as selective laser sintering (SLS) and selective laser melting (SLM), rectangular laser spots can speed up scanning speed and forming efficiency. In laser medical treatment, when treating skin diseases such as psoriasis and vitiligo, rectangular light spots can act on a larger area of ​​diseased skin at one time, improving treatment efficiency and reducing the number of treatments.

[0004] To this end, we propose a rectangular optical system and a rectangular laser emitter. Utility Model Content

[0005] The embodiments of the present application provide a rectangular optical system and a rectangular laser emitter to at least solve the problems in the prior art that the light beams generated by the laser systems are mostly circular in cross-section and have uneven light sources, high energy consumption, and limited application effects in certain specific fields.

[0006] In a first aspect, an embodiment of the present application provides a rectangular optical system, comprising:

[0007] A laser source, used for emitting laser light;

[0008] a laser collimator, which is arranged at the laser output end of the laser source to focus the laser into collimated laser light, wherein the laser collimator comprises at least a first plano-convex lens and a second plano-convex lens sequentially arranged on the laser path;

[0009] The rectangular array mirror is arranged at the laser emitting end of the laser collimating component to emit the incident collimated laser into a rectangular light spot.

[0010] Optionally, the rectangular array mirror comprises a first array mirror and a second array mirror which are attached to each other but the lens extends in the orthogonal direction, wherein the first array mirror is composed of a plurality of first strip cylindrical mirrors arranged in parallel along the width direction, the second array mirror is composed of a plurality of second strip cylindrical mirrors arranged in parallel along the width direction, and the outer wall surface of the first strip cylindrical mirror and the second strip cylindrical mirror is a convex mirror structure with a convex middle part extending along the length.

[0011] Optionally, the width of the first strip cylindrical mirror is different from the width of the second strip cylindrical mirror, and the width ratio of the first strip cylindrical mirror to the second strip cylindrical mirror is 3:5-1:2.

[0012] Optionally, the entrance surface and the exit surface of the first plano-convex lens, the second plano-convex lens and the rectangular array mirror are coated with an antireflection medium thin film.

[0013] Optionally, the convex surface of the first plano-convex lens and the second plano-convex lens faces the rectangular array mirror to focus and collimate the laser, and the focal length ratio of the first plano-convex lens to the second plano-convex lens ranges from 1.25 to 2.25.

[0014] Optionally, the laser source is a single / multi-mode semiconductor laser diode with a wavelength ranging from 375 nm to 2000 nm.

[0015] In a second aspect, the embodiments of the present application provide a rectangular laser emitter, which comprises a base and an upper cover, and a component cavity is formed between the base and the upper cover, and the component cavity contains the rectangular optical system of the first aspect,

[0016] and a focusing control mechanism for precisely adjusting the laser focal point.

[0017] Optionally, the focusing control mechanism comprises a heat sink frame fixed on the base, a second support, and a first support arranged on the side of the heat sink frame close to the second support.

[0018] The middle part of the heat sink frame is provided with a light source assembly hole, and the light source assembly hole is assembled with the laser source.

[0019] The middle part of the first support and the second support is provided with a light path hole located on the same straight line as the light source assembly hole, and the side of the two light path holes away from the heat sink frame is threadedly assembled with a lens seat, and the middle part of the two lens seats is respectively embedded with the first plano-convex lens and the second plano-convex lens.

[0020] Optionally, the upper cover is matched with a light source exit port arranged on one side of the rectangular array mirror.

[0021] Compared with the related art, the rectangular optical system and the rectangular laser emitter provided by the embodiments of the present application have at least the following technical effects:

[0022] The exit laser of the laser source is in a collimated state through the laser collimating member, and then the collimated laser reaches the rectangular array mirror without changing the beam quality, and through precise optical design, the rectangular array mirror exits the collimated laser as a rectangular light spot, realizing focusing and overall uniform emission of light, improving the precision and stability of laser irradiation, and being suitable for medical treatment, manufacturing and other fields, and having high practicality and economy.

[0023] Details of one or more embodiments of the present application are presented in the following drawings and description to make other features, objects and advantages of the present application more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 It is a structure schematic diagram of a rectangular laser emitter with a rectangular optical system according to an exemplary embodiment.

[0026] Figure 2 It is an internal diagram of a rectangular laser emitter with a rectangular optical system according to an exemplary embodiment.

[0027] Figure 3 It is a sectional view of a rectangular laser emitter with a rectangular optical system according to an exemplary embodiment.

[0028] Figure 4 It is a structure schematic diagram of a rectangular array mirror according to an exemplary embodiment.

[0029] Figure 5 It is a light intensity distribution diagram of a rectangular uniform light spot according to an exemplary embodiment.

[0030] Legend of the drawings: base 10; upper cover 20; light source exit port 201;

[0031] Rectangular optical system 30: laser source 301, first plano-convex lens 302, second plano-convex lens 303, rectangular array mirror 304;

[0032] Rectangular array mirror 304: first array mirror 3041, second array mirror 3042;

[0033] Focus control mechanism 40 : heat sink 401 , second bracket 402 , first bracket 403 , lens holder 404 . DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In related technologies, the beams currently produced by laser systems are mostly circular in cross-section and suffer from issues such as uneven light sources, high energy consumption, and poor application performance in certain specific areas. For example, in surface treatment, rectangular laser spots are used to quench the surface of metal materials, precisely controlling the shape and size of the treated area and improving the hardness and wear resistance of the material surface. In 3D printing, rectangular laser spots can accelerate scanning speed and molding efficiency in 3D printing technologies such as selective laser sintering (SLS) and selective laser melting (SLM). In laser medical treatment, rectangular laser spots can be applied to a larger area of ​​affected skin at once, improving treatment efficiency and reducing the number of treatments.

[0038] Based on the above situation, an embodiment of the present invention provides a rectangular optical system and a rectangular laser emitter, which are described in detail below with reference to specific embodiments and drawings.

[0039] Embodiment 1

[0040] The embodiment of the utility model provides a rectangular optical system. Figure 1 It is the rectangular laser transmitter structure schematic diagram with rectangular optical system according to an exemplary embodiment shows. Figure 2 It is the rectangular laser transmitter internal view with rectangular optical system according to an exemplary embodiment shows. Figure 3 It is the rectangular laser transmitter sectional view with rectangular optical system according to an exemplary embodiment shows. Figures 1-3 As shown, the rectangular optical system comprises:

[0041] Laser source 301 for emitting laser, in the embodiment, laser source 301 is single / multi-mode semiconductor laser diode of wavelength range 375nm-2000nm;

[0042] Laser collimation part, it is set to the laser emission end of laser source 301 to focus laser as collimated laser, wherein, laser collimation part at least includes the first plano-convex lens 302 and the second plano-convex lens 303 that are sequentially set on the laser path;In the embodiment, the convex surface of first plano-convex lens 302 and second plano-convex lens 303 all are towards rectangular array mirror 304 to focus collimated laser, and all are plano-convex spherical lens with positive focal power, and the focal length ratio range of first plano-convex lens 302 and second plano-convex lens 303 is 1.25-2.25;

[0043] Rectangular array mirror 304, it is set to the laser emission end of laser collimation part to emit incident collimated laser as rectangular light spot;In the embodiment, Figure 4 It is the rectangular array mirror structure schematic diagram according to an exemplary embodiment shows. Figure 4 As shown, rectangular array mirror 304 includes first array mirror 3041 and second array mirror 3042 that mutually adhere but lens extension direction orthogonal arrangement, wherein first array mirror 3041 is composed of a plurality of first strip cylindrical mirrors and is arranged in parallel along the width direction, second array mirror 3042 is composed of a plurality of second strip cylindrical mirrors and is arranged in parallel along the width direction, the outer wall surface of first strip cylindrical mirror and second strip cylindrical mirror is all the convex mirror structure of the middle part protruding and along its length extension, specifically, the width of first strip cylindrical mirror and second strip cylindrical mirror is different, the width of first strip cylindrical mirror is W1, the width of second strip cylindrical mirror is W2, and the width ratio of W1 and W2 is 3:5-1:2;

[0044] Specifically, when the light enters the first array mirror 3041, the light is divided into multiple fine beams in the horizontal direction, the initial modulation of the original light in the horizontal direction is changed, the intensity distribution of the light in the horizontal direction is more uniform, and a specific angle distribution is formed; after the light modulated by the first array mirror 3041 enters the second array mirror 3042, the light is similarly divided and modulated in the vertical direction, so that the propagation characteristics of the light in the vertical direction are changed, thereby forming a specific angle light distribution in the vertical direction; in summary, the light is divided, modulated and superimposed in two orthogonal directions by the rectangular array mirror 304, so that each position of the illumination area can receive the adjusted light, thereby realizing uniform illumination of the rectangular light spot.

[0045] In the technical solutions of the above embodiments, the emitted laser of the laser source 301 is in a collimated state after passing through the laser collimating component, and then the collimated laser reaches the rectangular array mirror 304 without changing the beam quality, through precise optical design, the rectangular array mirror 304 emits the collimated laser as a rectangular light spot, realizes focusing and overall uniform emission of the light, and improves the precision and stability of laser irradiation. Figure 5 is a rectangular uniform light spot light intensity distribution diagram according to an example embodiment. Referring to the accompanying drawings Figure 5 After the emitted laser passes through the rectangular optical system, the emitted laser is a rectangular light spot, and in the effective working range, the uniformity of the rectangular light spot reaches more than 95%, which is suitable for medical, manufacturing and other fields, and has high practicability and economy.

[0046] In this embodiment, the incident surface and the exit surface of the first plano-convex lens 302, the second plano-convex lens 303 and the rectangular array mirror 304 are all coated with an antireflection medium thin film.

[0047] In summary, the rectangular optical system provided by the embodiment of the utility model, the emitted laser of the laser source 301 is in a collimated state after passing through the laser collimating component, and then the collimated laser reaches the rectangular array mirror 304 without changing the beam quality, through precise optical design, the rectangular array mirror 304 emits the collimated laser as a rectangular light spot, realizes focusing and overall uniform emission of the light, and improves the precision and stability of laser irradiation, which is suitable for medical, manufacturing and other fields, and has high practicability and economy.

[0048] Embodiment 2

[0049] The difference between this embodiment and embodiment 1 is that the utility model embodiment 2 provides a rectangular laser emitter, which comprises a base 10 and an upper cover 20, and a component cavity is formed between the base 10 and the upper cover 20, and the component cavity contains the rectangular optical system of the first aspect,

[0050] and a focusing control mechanism 40 for precisely adjusting the laser focal point; in this embodiment, the accompanying drawings are continued to be referred toFigures 2-3 The focus control mechanism 40 includes a heat sink 401 fixed to the base 10, a second bracket 402, and a first bracket 403 provided on a side of the heat sink 401 close to the second bracket 402;

[0051] A light source assembly hole is provided in the middle of the heat sink 401, and a laser source 301 is mounted in the light source assembly hole;

[0052] The middle of the first bracket 403 and the second bracket 402 are both provided with light path holes located in the same straight line as the light source assembly hole. The two light path holes are threadedly assembled with lens holders 404 on the side away from the heat sink frame 401. The middle of the two lens holders 404 are respectively embedded with the first plano-convex lens 302 and the second plano-convex lens 303.

[0053] In the technical solution of the above embodiment, the laser source 301 is correctly installed in the correct direction and fixed to the heat sink 401 by pressing. In this embodiment, the heat sink 401 is made of gold-plated copper, and the gap between the laser source 301 and the light source assembly hole is filled with indium sheet to achieve sufficient heat dissipation.

[0054] The planes of the first and second plano-convex lenses 302 and 303 face the laser source 301 and are first fixed to the lens holder 404 using UV adhesive. The positions of the two lens holders 404 in the optical path are then adjusted by rotating the threads so that the laser light emitted from the laser source 301 is in a collimated state after passing through the laser collimator.

[0055] The collimated laser reaches the rectangular array mirror 304 without changing the beam quality, and the rectangular array mirror 304 emits the collimated laser as a rectangular light spot.

[0056] Figure 5 FIG. 1 is a diagram showing the intensity distribution of a rectangular uniform light spot according to an exemplary embodiment. Figure 5 After the outgoing laser passes through the rectangular laser emitter, it is emitted as a rectangular light spot, and within the effective working range, the uniformity of the rectangular light spot reaches more than 95%. It is suitable for medical, manufacturing and other fields, and has high practicality and economy.

[0057] Refer to the attached Figure 1 and 3 A light source outlet 201 is provided on one side of the upper cover 20 corresponding to the rectangular array mirror 304 for emitting rectangular laser light.

[0058] For other structures not described, refer to Example 1.

[0059] In summary, in the rectangular optical system and rectangular laser emitter provided by the embodiments of the present invention, the outgoing laser of the laser source 301 is in a collimated state after passing through the laser collimator, and then the collimated laser reaches the rectangular array mirror 304 without changing the beam quality. Through precise optical design, the rectangular array mirror 304 emits the collimated laser as a rectangular light spot, realizing the focusing and overall uniform emission of light, improving the accuracy and stability of laser irradiation, and being suitable for medical, manufacturing and other fields, with high practicality and economy.

[0060] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the concept of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be based on the appended claims.

Claims

1. A rectangular optical system, characterized in that: include: A laser source, used for emitting laser light; a laser collimator, which is arranged at the laser output end of the laser source to focus the laser into collimated laser light, wherein the laser collimator comprises at least a first plano-convex lens and a second plano-convex lens sequentially arranged on the laser path; The rectangular array mirror is arranged at the laser emitting end of the laser collimating component to emit the incident collimated laser into a rectangular light spot.

2. The rectangular optical system according to claim 1, wherein: The rectangular array mirror includes a first array mirror and a second array mirror that are bonded to each other but arranged orthogonally in the direction of lens extension, wherein the first array mirror is composed of a plurality of first strip cylindrical mirrors arranged in parallel along the width direction, and the second array mirror is composed of a plurality of second strip cylindrical mirrors arranged in parallel along the width direction, and the outer wall surfaces of the first strip cylindrical mirror and the second strip cylindrical mirror are both convex mirror structures with a convex middle part and extending along their length.

3. The rectangular optical system according to claim 2, wherein: The width of the first strip cylindrical mirror is different from the width of the second strip cylindrical mirror, and the width ratio of the first strip cylindrical mirror to the second strip cylindrical mirror is 3:5-1:

2.

4. The rectangular optical system according to claim 1, wherein: The incident surface and the exit surface of the first plano-convex lens, the second plano-convex lens and the rectangular array mirror are all coated with anti-reflection dielectric films.

5. The rectangular optical system according to claim 1, wherein: The convex surfaces of the first plano-convex lens and the second plano-convex lens are both oriented toward the rectangular array mirror to focus and collimate the laser, and the focal length ratio of the first plano-convex lens and the second plano-convex lens is in a range of 1.25-2.

25.

6. The rectangular optical system according to claim 1, wherein: The laser source is a single / multi-mode semiconductor laser diode with a wavelength range of 375nm-2000nm.

7. A rectangular laser emitter, characterized in that: It comprises a base and an upper cover, and an element cavity is formed between the base and the upper cover, and the rectangular optical system according to claims 1 to 6 is accommodated in the element cavity. and a focus control mechanism for precisely adjusting the laser focus.

8. The rectangular laser emitter according to claim 7, wherein: The focus control mechanism includes a heat sink fixed on the base, a second bracket, and a first bracket arranged on a side of the heat sink close to the second bracket; A light source assembly hole is provided in the middle of the heat sink, and the laser source is mounted in the light source assembly hole; The middle parts of the first bracket and the second bracket are both provided with light path holes located in the same straight line as the light source assembly hole, and the two light path holes are threadedly assembled with lens seats on the side facing away from the heat sink, and the middle parts of the two lens seats are respectively embedded with the first plano-convex lens and the second plano-convex lens.

9. The rectangular laser emitter according to claim 7, wherein: A light source outlet is provided on one side of the upper cover corresponding to the rectangular array mirror.

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