Square optical system and square laser transmitter

Abstract

The utility model relates to a square optical system and a square laser transmitter. The square optical system comprises a laser source used for emitting laser; the light beam shaping piece is arranged at the laser emitting end of the laser source so as to focus the laser and shape the laser into square light spots, and the light beam shaping piece at least comprises a plano-convex lens, a first Powell prism and a second Powell prism which are sequentially arranged on a laser path; and the curved lens is arranged at the laser emergent end of the light beam shaping piece so as to carry out distortion correction and uniform light intensity distribution on the incident square light spots. According to the utility model, the laser is collimated and is emitted into square light spots, the focusing and overall uniform emission of light rays are realized, the accuracy and stability of laser irradiation are improved, the energy consumption is lower, the energy is saved, the requirements of energy conservation and environmental protection are met, and higher practicability and economical efficiency are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of square laser emitters, in particular to a square optical system and a square 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 application effectiveness in certain specific areas.

[0003] For example, optical modulation: To achieve a square and uniform light spot in the beam output by the laser, it is often necessary to use optical modulation technology to precisely control and adjust the beam, and laser beam shaping technology also plays a vital role.

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

[0005] The embodiments of the present application provide a square optical system and a square 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 square optical system, comprising:

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

[0008] a beam shaper disposed at the laser output end of the laser source to focus the laser and shape it into a square spot, wherein the beam shaper comprises at least: a plano-convex lens, a first Powell prism, and a second Powell prism sequentially disposed on the laser path;

[0009] The curved lens is arranged at the laser output end of the beam shaping component to correct the distortion of the incident square light spot and uniformly distribute the light intensity.

[0010] Optionally, the incident surface and the exit surface of the plano-convex lens, the first Powell prism, the second Powell prism and the curved lens are all coated with an anti-reflection dielectric film.

[0011] Optionally, the convex surfaces of the plano-convex lenses all face the curved lens to focus and collimate the laser.

[0012] Optionally, the curved surfaces of the first Powell prism and the second Powell prism both face the plano-convex lens, and the curved surface of the first Powell prism and the curved surface of the second Powell prism are arranged in a perpendicular orthogonal arrangement that rotates 90 degrees along the optical axis.

[0013] Optionally, the laser source is a single / multi-mode semiconductor laser diode with a wavelength range of 405 nm - 2000 nm.

[0014] In a second aspect, an embodiment of the present application provides a square laser emitter, which includes a base and an upper cover, and an element cavity is formed between the base and the upper cover, and the square optical system of the first aspect is accommodated in the element cavity.

[0015] A first bracket for assembling the first Powell prism;

[0016] A second bracket for assembling the second Powell prism;

[0017] And a focusing control mechanism for precisely adjusting the laser focus.

[0018] Optionally, the focusing control mechanism includes a heat sink bracket fixed to the base and an accessory bracket fixed to one side of the heat sink bracket. A light source assembly hole is formed in the middle of the heat sink bracket, and the laser source is assembled in the light source assembly hole. An optical path hole is formed in the middle of the accessory bracket and is located on the same straight line as the light source assembly hole. A lens holder is threadedly assembled on the side of the optical path hole facing away from the heat sink bracket, and the plano-convex lens is embedded in the middle of the lens holder.

[0019] Optionally, a light source exit port is correspondingly formed on the upper cover on the side corresponding to the curved surface lens.

[0020] Compared with the related art, the square optical system and the square laser emitter provided by the embodiments of the present application have at least the following technical effects:

[0021] Through precise optical design, the laser emitted by the laser source 301 becomes a square light spot after passing through the beam shaper. Subsequently, without changing the beam quality, the curved surface lens 305 corrects the distortion of the square light spot and further improves the uniform distribution of the light intensity, thereby realizing the focusing and overall uniform emission of the light, improving the accuracy and stability of the laser irradiation, having low energy consumption, saving energy, meeting the requirements of energy conservation and environmental protection, and having high practicability and economy.

[0022] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of a square laser emitter with a square optical system shown according to an exemplary embodiment.

[0025] Figure 2 It is an internal view of a square laser emitter with a square optical system shown according to an exemplary embodiment.

[0026] Figure 3 It is a cross-sectional view of a square laser emitter with a square optical system shown according to an exemplary embodiment.

[0027] Figure 4 It is a light intensity distribution diagram of a square uniform light spot shown according to an exemplary embodiment.

[0028] Explanation of reference numerals: Base 10; Upper cover 20; Light source exit port 201;

[0029] Square optical system 30: Laser source 301, plano-convex lens 302, first Powell prism 303, second Powell prism 304, curved lens 305;

[0030] Focus control mechanism 40: Heat sink holder 401, accessory bracket 402, lens holder 403, first bracket 404, second bracket 405. Specific embodiments

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the related art, at present, the cross-section of the beam generated by the laser system is mostly circular, and there are problems such as uneven light source, high energy consumption, and limited application effects in certain specific fields. For example, in optical modulation: to achieve a square and uniform light spot in the beam output by the laser, it is often necessary to use optical modulation technology to precisely control and adjust the beam, and the laser beam shaping technology also plays a crucial role.

[0035] Based on the above situation, the embodiments of the present utility model provide a square optical system and a square laser emitter, which will be elaborated in detail below in conjunction with specific embodiments and drawings.

[0036] Embodiment 1

[0037] The embodiments of the present utility model provide a square optical system. Figure 1 is a schematic structural diagram of a square laser emitter with a square optical system shown according to an exemplary embodiment. Figure 2 is an internal view of a square laser emitter with a square optical system shown according to an exemplary embodiment.

[0038] Figure 3 is a cross-sectional view of a square laser emitter with a square optical system shown according to an exemplary embodiment. As Figures 1-3 shown, the square optical system 30 includes:

[0039] a laser source 301 for emitting laser; in this embodiment, the laser source 301 is a single / multi-mode semiconductor laser diode with a wavelength range of 405 nm - 2000 nm;

[0040] A beam shaper is disposed at the laser output end of the laser source 301 to focus the laser and shape it into a square light spot. Wherein, the beam shaper at least includes: a plano-convex lens 302, a first Powell prism 303, and a second Powell prism 304 that are sequentially disposed on the laser path; in this embodiment, the convex surfaces of the plano-convex lens 302 all face the aspheric lens 305 to focus and collimate the laser; the curved surfaces of the first Powell prism 303 and the second Powell prism 304 both face the plano-convex lens, and the curved surface of the first Powell prism 303 and the curved surface of the second Powell prism 304 are arranged in a vertical orthogonal arrangement with a 90-degree rotation along the optical axis; and the conical coefficients of the first Powell prism 303 and the second Powell prism 304 are set differently, and the difference between the two is within 1.

[0041] An aspheric lens 305 is disposed at the laser output end of the beam shaper to correct the distortion of the incident square light spot and evenly distribute the light intensity.

[0042] In the technical solution of the above embodiment, the output laser of the laser source 301 passes through the plano-convex lens 302 and is in a focused and collimated state. Subsequently, the collimated laser reaches the first Powell prism 303 without changing the beam quality. The first Powell prism 303 vertically compresses the beam divergence angle without changing the beam quality. Subsequently, the second Powell prism 304 horizontally compresses the beam divergence angle again to shape the beam into a square light spot. Finally, the aspheric lens 305 corrects the distortion of the square light spot and further improves the even distribution of the light intensity, thereby realizing the focusing of the light and the overall uniform emission, and improving the accuracy and stability of the laser irradiation. Figure 4 It is a light intensity distribution diagram of a square uniform light spot shown according to an exemplary embodiment. Refer to the appendix Figure 4 , after the output laser passes through the square optical system, it outputs a square light spot, and within the effective working range, the uniformity of the square light spot reaches more than 95%, which is applicable to fields such as medical treatment and manufacturing, and has high practicability and economy.

[0043] Among them, it can be understood that the output laser of the light source output port 201 is specially designed to achieve the emission of a square-shaped light spot. It is not limited to a square, and the angle can also be changed to achieve a combination of various shapes.

[0044] In this embodiment, the incident surfaces and the output surfaces of the plano-convex lens, the first Powell prism, the second Powell prism, and the aspheric lens are all coated with an anti-reflection dielectric film.

[0045] In summary, the square optical system provided by the embodiment of the present utility model, through precise optical design, the emitted laser of the laser source 301 is changed into a square light spot by the beam shaping member, and then the curved surface lens 305 corrects the distortion of the square light spot and further improves the uniform distribution of light intensity without changing the beam quality, thereby realizing the focusing of light and the overall uniform emission, improving the accuracy and stability of laser irradiation, having low energy consumption, saving energy, meeting the requirements of energy conservation and environmental protection, and having high practicability and economy.

[0046] Embodiment 2

[0047] Embodiment 2 of the present utility model provides a square laser emitter, which includes a base 10 and an upper cover 20, and an element cavity is formed between the base 10 and the upper cover 20, and the square optical system 40 of the above first aspect is accommodated in the element cavity.

[0048] The first bracket 404 is used for assembling the first Powell prism 303;

[0049] The second bracket 405 is used for assembling the second Powell prism 304;

[0050] And a focusing control mechanism for precisely adjusting the laser focus; in this embodiment, the focusing control mechanism includes a heat sink bracket 401 fixed on the base and an accessory bracket 402 fixed on one side of the heat sink bracket 401. A light source assembly hole is formed in the middle of the heat sink bracket 401, and the laser source 301 is assembled in the light source assembly hole. An optical path hole is formed in the middle of the accessory bracket 402 and is located on the same straight line as the light source assembly hole. A lens holder 403 is threadedly assembled on the side of the optical path hole away from the heat sink bracket 401, and a plano-convex lens 302 is embedded in the middle of the lens holder 403.

[0051] In this embodiment, continue to refer to the attached Figure 1 The upper cover 20 is correspondingly provided with a light source exit port 201 on the side corresponding to the curved surface lens 305.

[0052] In the technical solution of the above embodiment, the correct installation direction of the laser source 301 is selected, and the laser source 301 is fixed on the heat sink bracket 401 by a pressing method. In this embodiment, the heat sink bracket 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 sheets to achieve sufficient heat dissipation;

[0053] The plane of the plano-convex lens 302 faces the laser source 301, and it is first fixed on the lens holder 403 with ultraviolet glue, and then the position of the lens holder 403 in the optical path is adjusted by screw rotation, so that the emitted laser of the laser source 301 passes through the plano-convex lens 302, the first Powell prism 303 and the second Powell prism 304 to become a clear square light spot;

[0054] The square light spot reaches the curved lens 305 without changing the beam quality. The curved lens 305 corrects the distortion of the square light spot and further improves the uniform distribution of the light intensity, thereby realizing the focusing of the light rays and the overall uniform emission.

[0055] Figure 4 It is the light intensity distribution diagram of the square uniform light spot shown according to an exemplary embodiment. Refer to the appendix Figure 4 , after the outgoing laser passes through the square laser emitter, it emits a square light spot, and within the effective working range, the uniformity of the square light spot reaches more than 95%, which is applicable to fields such as medical treatment and manufacturing, and has high practicability and economy.

[0056] Refer to the appendix Figure 1 and 3 , on the side of the upper cover 20 corresponding to the curved lens 305, a light source outlet 201 is correspondingly opened for the emission of the square laser.

[0057] For other structures not described, refer to Embodiment 1.

[0058] In summary, for the square optical system and the square laser emitter provided by the embodiments of the present invention, through precise optical design, the outgoing laser of the laser source 301 becomes a square light spot after passing through the beam shaper. Subsequently, the curved lens 305 corrects the distortion of the square light spot and further improves the uniform distribution of the light intensity without changing the beam quality, thereby realizing the focusing of the light rays and the overall uniform emission, improving the accuracy and stability of laser irradiation, having low energy consumption, saving energy, meeting the requirements of energy conservation and environmental protection, and having high practicability and economy.

[0059] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.

[0060] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A square optical system, characterized in that, Including: A laser source for emitting laser light; A beam shaper disposed at the laser output end of the laser source to focus the laser and shape it into a square light spot. The beam shaper at least includes: a plano-convex lens, a first Powell prism, and a second Powell prism sequentially disposed on the laser path; A curved lens disposed at the laser output end of the beam shaper to correct the distortion of the incident square light spot and evenly distribute the light intensity.

2. The square optical system according to claim 1, wherein: Anti-reflection dielectric thin films are coated on the incident surfaces and the output surfaces of the plano-convex lens, the first Powell prism, the second Powell prism, and the curved lens.

3. The square optical system according to claim 1, wherein: The convex surfaces of the plano-convex lens all face the curved lens to focus and collimate the laser.

4. The square optical system according to claim 1, wherein: The curved surfaces of the first Powell prism and the second Powell prism both face the plano-convex lens, and the curved surface of the first Powell prism and the curved surface of the second Powell prism are arranged in a perpendicular orthogonal arrangement with a 90-degree rotation along the optical axis.

5. The square optical system according to claim 1, characterized in that: The laser source is a single / multi-mode semiconductor laser diode with a wavelength range of 405nm - 2000nm.

6. A square laser emitter, characterized in that: It includes a base and an upper cover, and an element cavity is formed between the base and the upper cover. The element cavity houses the square optical system described in claims 1 - 5. A first bracket for assembling the first Powell prism; A second bracket for assembling the second Powell prism; And a focusing control mechanism for precisely adjusting the laser focus.

7. The square laser emitter according to claim 6, wherein: The focusing control mechanism includes a heat sink bracket fixed to the base and an auxiliary bracket fixed to one side of the heat sink bracket. A light source assembly hole is opened in the middle of the heat sink bracket, and the laser source is assembled in the light source assembly hole. An optical path hole aligned with the light source assembly hole is opened in the middle of the auxiliary bracket. A lens holder is threadedly assembled on the side of the optical path hole facing away from the heat sink bracket, and the plano-convex lens is embedded in the middle of the lens holder.

8. The square laser emitter according to claim 6, wherein: The upper cover is correspondingly provided with a light source output port on the side corresponding to the curved lens.

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