A micro-laser light trap structure

Abstract

The application relates to a micro laser light trapping structure and belongs to the technical field of optical equipment, which comprises a cavity, a triangular group, a conical structure and a mirror, the cavity is provided with an inlet port, the triangular group is located at the inlet port of the cavity and is fixed in the cavity, the conical structure is fixed in the cavity and faces the inlet port, the conical structure is used for absorbing light at the inlet port, the mirror is located on the inner side wall of the cavity and is fixed in the cavity, the mirror is used for receiving light emitted from the conical structure, the mirror can reflect the light to the triangular group, and the light passes through the conical structure and the mirror in sequence from the inlet port and then reaches the triangular group; the conical structure realizes efficient collection and focusing of the light, and the triangular group absorbs most of the light.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of optical equipment, and particularly relates to a light trap structure for micro laser. BACKGROUND

[0002] Pyrolysis particles, also known as thermionic ions, are released when the outer electrons of atoms escape due to energy enhancement when the substance in the environment is heated and damaged, so that the substance is ionized to release charged thermionic ions. The early equipment overheating detection system is a system based on thermionic ion detection, in order to detect the equipment overheating more accurately, the thermionic ions need to be accurately detected. However, accurate detection cannot be achieved without the accuracy and smallness of the light trap structure.

[0003] The laser light trap is a structure that can collect stray light or unnecessary light, and is currently used in a scattered light collection system to absorb scattered stray light and improve equipment precision. The laser light trap plays an important role in the fields of laser technology and communication. The traditional laser light trap usually includes a lens or a reflector for focusing or collecting light, and is commonly used in devices such as lasers and optical communication systems.

[0004] However, the traditional laser light trap has problems such as large size, complex manufacturing, and high cost. In the application of micro lasers, micro optical communication systems, etc., smaller, simpler manufacturing process, and lower cost optical collectors are needed.

[0005] Therefore, it is necessary to provide a new type of micro laser light trap structure that can meet the needs of the early equipment overheating detection system for light traps, achieve efficient collection and focusing of light, and has the advantages of small size, simple manufacturing, and low cost. SUMMARY

[0006] The application mainly solves the technical problem of how to efficiently collect and focus light. The application provides a micro laser light trap structure. Light enters the light port, passes through the conical structure and the reflector in sequence, and then reaches the triangular group. The conical structure realizes efficient collection and focusing of light, and the triangular group absorbs most of the light.

[0007] In order to achieve the above purpose, the application realizes the following technical scheme:

[0008] A micro laser light trap structure comprises:

[0009] A cavity, wherein the cavity is provided with a light inlet port;

[0010] A triangular group is located at the light inlet port of the cavity, and the triangular group is fixed in the cavity. The triangular group is used to consume light in the cavity.

[0011] a conical structure fixed in the cavity, the conical structure being opposite to the light inlet port, the conical structure being used for absorbing light at the light inlet port;

[0012] a mirror located on the inner side wall of the cavity and fixed in the cavity, the mirror being used for receiving light emitted from the conical structure, the mirror being capable of reflecting the light to the triangular group;

[0013] The light sequentially passes through the conical structure and the mirror from the light inlet port and then reaches the triangular group.

[0014] Optionally, the cavity comprises a cuboid inner cavity and a trapezoidal inner cavity.

[0015] The cuboid inner cavity is used for fixing the triangular group, and the opening end of the cuboid inner cavity has the light inlet port and the triangular group.

[0016] The trapezoidal inner cavity contains the conical structure, and the mirror is arranged on the inner side wall of the trapezoidal inner cavity and is opposite to the conical structure.

[0017] Optionally, the light can be focused at the conical tip of the conical structure, so that the conical structure concentrates the light and generates a stronger light beam, the conical tip of the conical structure being opposite to the geometric center of the light inlet port of the cavity.

[0018] Optionally, a spiral groove is formed in the outer side wall of the conical structure, the spiral groove is provided with a threaded structure, the threaded structure is made of glass, a layer of anodic oxidation blackening sandblasting is first sprayed on the conical structure and the threaded structure, and then a black light-absorbing paint with high absorption is coated on the conical structure and the threaded structure, the light is scattered through the outer side wall of the conical structure and the threaded structure, the light is diverged or scattered in different directions, and the cross section of the conical structure gradually increases from the cuboid inner cavity to the trapezoidal inner cavity.

[0019] Optionally, the thread of the threaded structure is an SM05 optical thread.

[0020] Optionally, the triangular group is arranged in pairs, two triangular groups form a pair of triangular groups, two pairs of triangular groups are symmetrically arranged about the center line of the cavity, the cross section of the triangular group is an equilateral triangle, and in a pair of triangular groups, the product of the side length of the triangular group and the number of the triangular groups is equal to the length of the inner wall of the cuboid inner cavity of the cuboid inner cavity.

[0021] Optionally, the inner wall of the cuboid inner cavity is coated with black light-absorbing paint.

[0022] Optionally, the outer wall of the triangular group is coated with black light-absorbing paint.

[0023] Optionally, the included angle between the mirror and the center line of the cavity ranges from -10° to -20° or from 10° to 20°.

[0024] Optionally, the conical structure is connected with a glass base, the glass base is away from the light inlet port, the ratio of the height of the conical structure to the radius of the bottom circle away from the conical tip of the conical structure is 5:2, the diameter of the bottom circle is the same as the diameter of the glass base, and the end surface of the glass base away from the light inlet port is close to the mirror.

[0025] Advantages of the present application:

[0026] In the present application, part of the stray light is scattered to the mirror through the outer sidewall of the conical structure, then reflected, reflected to the triangular group, then mostly absorbed by the triangular group, and a small part of the stray light not absorbed will be reflected in the triangular group until finally absorbed by the triangular group. Specifically, part of the stray light is focused through the conical tip of the conical structure, the light beam in the conical structure is shot on the mirror, the mirror is reflected, the stray light is reflected to the triangular group, then mostly absorbed by the triangular group, and a small part of the stray light not absorbed will be reflected in the triangular group until finally absorbed by the triangular group. Another part of the stray light will be absorbed by the thread structure on the conical structure. The present application has subtle structure, can meet the requirements of the light trap of the extremely early device overheating detection system, realizes efficient collection and focusing of light by the conical structure, and has the advantages of small volume, simple manufacturing and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 is a sectional view of the present application;

[0029] Figure 2 is a perspective view of the conical structure of the present application;

[0030] Figure 3 is a perspective view of the triangular group structure of the present application;

[0031] Figure 4 is a perspective view of the whole structure of the present application.

[0032] Figure descriptions: 1-Inlet port, 2-Triangular assembly, 3-Cavity wall, 4-Conical structure, 41-Spiral groove, 5-Threaded structure, 6-Inner wall of the cuboid cavity, 7-Reflector, 8-Outer wall of the triangular assembly, 9-Glass base, A-Inner cavity of the cuboid, B-Inner cavity of the trapezoid, C-Cavity. Detailed Implementation

[0033] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0034] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Example 1

[0038] like Figure 1As shown, this embodiment provides a miniature laser light trap structure, including: a cavity C, a triangular assembly 2, a conical structure 4, a reflector 7, and a top cover. The top cover can cover the top of the entire light trap structure (i.e., the light inlet port 1 end) for easy light shielding. The cavity C has a cavity wall 3 and is composed of a cuboid inner cavity A and a trapezoidal inner cavity B. The cuboid inner cavity A is for easy fixation of the triangular assembly 2. The opening end of the cuboid inner cavity A has the laser light inlet port 1. The conical structure 4 is disposed inside the trapezoidal inner cavity B. The triangular assembly 2 is disposed at the opening end of the cuboid inner cavity A (the light inlet port 1 end). The triangular assembly 2 facilitates the reception of stray light reflected from the reflector 7. The reflector 7 is disposed on the two inner sidewalls of the trapezoidal inner cavity B. The conical structure 4 is directly opposite the geometric center of the light inlet port 1 of the cavity C and is fixed in the cavity C. The triangular assembly 2 is fixed in the cavity C, and the reflector 7 is fixed on the sidewall of the trapezoidal inner cavity B of the cavity C and fixed in the cavity C.

[0039] like Figure 1 As shown, in this embodiment, the tip of the conical structure 4 is positioned directly opposite the geometric center of the light-inlet port 1 of the cavity C, allowing light to be focused through the tip of the cone, thereby concentrating the light to produce a stronger beam. Figure 2 As shown, a spiral groove 41 is formed on the outer wall of the conical structure 4, and a threaded structure 5 is provided on the spiral groove 41. The threaded structure 5 can be made of glass. The conical structure 4 and the threaded structure 5 are first sprayed with a layer of anodized black sandblasting to improve the wear resistance, corrosion resistance and increase the surface roughness of the conical structure 4 and the threaded structure 5, which is beneficial to increase the adhesion of the coating. Then, a high-absorption black light-absorbing paint (generally, black light-absorbing paint has a high absorption rate because black itself absorbs light) is applied to the conical structure 4 and the threaded structure 5 to absorb light. Light is scattered by the outer surface of the conical structure 4 and the threaded structure 5 can also scatter light, causing the light to diverge in different directions. The cross-section of the conical structure 4 gradually increases from the inner cavity A of the cuboid to the inner cavity B of the trapezoidal structure.

[0040] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, there are two sets of triangular bodies 2. Each set consists of two triangular bodies, forming a group or pair. Each set of triangular bodies 2 contains two triangular bodies. The cross-section of each triangular body is an equilateral triangle. The side length of each triangular body multiplied by the number of triangular bodies in each set of triangular bodies 2 equals the length of the inner wall 6 of the cuboid cavity A. The side length of the equilateral triangle is generally 1mm-3mm. Two adjacent equilateral triangular bodies ensure that light is continuously reflected within the set of triangular bodies 2 until the light disappears.

[0041] In this embodiment, the mirror 7 is a low reflectivity mirror, and the mirror 7 is one of anti-reflective glass, non-reflective glass or anti-glare glass, and the reflectivity of the mirror 7 is less than 5%. Due to the low reflectivity of the low reflectivity mirror 7, the reflected radiation energy is greatly reduced compared to the original, increasing the loss of light energy. The low reflectivity mirror 7 is a mirror surface with a smooth surface.

[0042] In this embodiment, the height of the conical structure 4 and the bottom circle (i.e. the circle at the bottom end of the conical structure 4) away from the conical tip (the top end of the conical structure 4) of the conical structure 4 are in a ratio of 5:2, which can enable the incident light to complete a substantially ideal diffuse reflection on the thread structure 5 of each conical structure 4.

[0043] In this embodiment, the conical structure 4 is connected to the glass base 9, and the glass base 9 is away from the light inlet port 1. The diameter of the bottom circle at the bottom end of the conical structure 4 is the same as the diameter of the glass base 9, and the glass base 9 is a cylinder. The end surface circle (i.e. the bottom end circle of the glass base 9, and the top end circle of the glass base 9 is connected to the conical structure 4) of the glass base 9 away from the light inlet port 1 is close to the mirror 7, so that substantially all the light received will pass through the conical structure 4.

[0044] In this embodiment, the side surface of the conical structure 4 has a thread structure 5, and the thread structure 5 is an SM05 optical thread, which can participate in the absorption of laser.

[0045] In this embodiment, the angle between the mirror 7 and the center line of the cavity C is in the range of -10° to -20° or 10° to 20°.

[0046] In this embodiment, the outer wall 8 of the triangular group is coated with light-absorbing paint, and the light-absorbing paint should be high-absorption black paint.

[0047] In this embodiment, the inner wall 6 of the cuboid inner cavity is coated with light-absorbing paint, and the light-absorbing paint should be high-absorption black paint.

[0048] In this embodiment, the total length of the cavity C is not more than 10 mm.

[0049] In this embodiment, the opening end of the cuboid inner cavity A has a laser light inlet port 1, and the opening of the laser light inlet port 1 is a rectangle with a width of 4 mm and a height of 5 mm.

[0050] Embodiment 2

[0051] Based on the embodiment 1, assuming that the energy of the light entering the light trap is 100, after the diffuse reflection of the conical structure 4, the leaked light energy is 100*0.05*0.01=0.05; after the reflection of the mirror 7 at least once, the energy remaining is not more than 0.0025. Since part of the light energy is also absorbed by the thread structure 5 on the conical structure 4, or a certain proportion of overflow needs to be reflected for many times, the leakage of this part can be about 0.0001, that is, the absorption rate can reach 0.999999.

[0052] Embodiment 3

[0053] Based on all the above embodiments, the light of the application passes through the conical structure 4 and the mirror 7 in turn from the light inlet port 1 to the triangular group 2.

[0054] The conical tip of the conical structure 4 is directly opposite the geometric center of the light inlet port 1 of the cavity C, so that the light can be focused through the conical tip, the light in the conical structure 4 is concentrated or absorbed to generate a stronger light beam, the light in the conical structure 4 is scattered by the outer sidewall of the conical structure 4 and the thread structure 5 to make the light diverge in different directions.

[0055] Since the reflected radiant energy of the mirror 7 is greatly reduced compared to the original, the loss of light energy is increased. The low reflector 7 is a mirror surface with smooth surface.

[0056] Finally, the light can be reflected in the triangular group 2 through adjacent equilateral triangles until the light disappears. The inner wall 6 of the cuboid cavity is coated with light-absorbing paint, which can further enhance the absorption of light after scattering in the conical structure 4.

[0057] Therefore, the light trap structure for micro laser provided by the embodiment of the application greatly reduces the proportion of diffused light escaping, improves the absorption rate of the light trap for light, can meet the needs of the light trap for the extremely early equipment overheating detection system, realizes efficient collection and focusing of light, and has the advantages of small size, simple manufacturing, and low cost.

[0058] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A micro-laser optical trap structure, characterized by, The utility model relates to a light energy conversion device, including: a cavity (C) which is provided with an entrance port (1) on the surface thereof; the cavity (C) comprises a cuboid inner cavity (A) and a trapezoidal inner cavity (B); the cuboid inner cavity (A) is used for fixing a triangular group (2); the entrance port (1) and the triangular group (2) are arranged on the opening end of the cuboid inner cavity (A); the trapezoidal inner cavity (B) is internally provided with a conical structure (4); a reflecting mirror (7) is arranged on the inner side wall of the trapezoidal inner cavity (B) and is opposite to the conical structure (4); the triangular group (2) is arranged at the entrance port (1) of the cavity (C) and is fixed in the cavity (C); the triangular group (2) is used for consuming light in the cavity (C); the conical structure (4) is fixed in the cavity (C) and is opposite to the entrance port (1); the conical structure (4) is used for absorbing light at the entrance port (1); a spiral groove (41) is arranged on the outer side wall of the conical structure (4); a threaded structure (5) is arranged on the spiral groove (41); the cross section of the conical structure (4) gradually increases from the cuboid inner cavity (A) to the trapezoidal inner cavity (B); the reflecting mirror (7) is arranged on the inner side wall of the cavity (C) and is fixed in the cavity (C); the reflecting mirror (7) is used for receiving light emitted by the conical structure (4) and reflecting the light to the triangular group (2); light passes through the conical structure (4) and the reflecting mirror (7) in sequence and then reaches the triangular group (2) from the entrance port (1).

2. The optical trap structure for a micro-laser according to claim 1, wherein The geometric center of the entrance port (1) of the cavity (C) is opposite to the conical tip of the conical structure (4); light can be focused at the conical tip of the conical structure (4), so that the conical structure (4) concentrates light and generates a stronger light beam.

3. The optical trap structure for micro-laser according to claim 1, wherein The threaded structure (5) is made of glass; a layer of anodized black sandblasting is sprayed on the conical structure (4) and the threaded structure (5); high-absorption black light-absorbing paint is coated on the conical structure (4) and the threaded structure (5); light is scattered through the outer side wall of the conical structure (4) and the threaded structure (5), so that the light is scattered or diverged in different directions.

4. The optical trap structure for micro-laser according to claim 1, wherein The thread of the threaded structure (5) is an SM05 optical thread.

5. The optical trap structure for a micro-laser according to claim 1, wherein The triangular group (2) is arranged in pairs; two triangles form a pair of triangular groups (2); two pairs of triangular groups (2) are symmetrically arranged about the center line of the cavity (C); the cross section of the triangle is an equilateral triangle; in a pair of triangular groups (2), the length of the side of the triangle multiplied by the number of the triangle is equal to the length of the cuboid inner cavity inner wall (6) of the cuboid inner cavity (A).

6. The optical trap structure for a micro-laser according to claim 5, wherein The cuboid inner cavity inner wall (6) is coated with black light-absorbing paint.

7. The optical trap structure for a micro-laser according to claim 6, wherein The outer wall (8) of the triangular group (2) is coated with black light-absorbing paint.

8. The optical trap structure for micro-laser according to claim 1, wherein The included angle between the reflecting mirror (7) and the center line of the cavity (C) ranges from -10° to -20° or from 10° to 20°.

9. The optical trap structure for a micro-laser according to claim 1, wherein The conical structure (4) is connected with a glass base (9) which is away from the light inlet port (1), the height of the conical structure (4) is in a ratio of 5:2 to the radius of the bottom circle away from the tip of the conical structure (4), the diameter of the bottom circle is the same as the diameter of the glass base (9), and the end surface of the glass base (9) away from the light inlet port (1) is close to the reflecting mirror (7).

Images