A new light trapping device

Abstract

The present invention relates to a novel light trapping device, comprising a first reflector group, wherein the first reflector group comprises at least one first reflector, each of which comprises a reflective surface one and a reflective surface two; a second reflector group, wherein the second reflector group comprises at least one second reflector, each of which comprises a reflective surface three and a reflective surface four; the reflective surface three is parallel to the reflective surface two, and the reflective surface four is parallel to the reflective surface one; the back surface of each reflective surface one, the back surface of the reflective surface two, the back surface of the reflective surface three, and the back surface of the reflective surface four are all provided with a first light absorbing material. The light trapping device reflects incident laser back and forth between the first reflector group and the second reflector group, and each time the incident laser is incident on the reflective surface, part of the laser passes through the reflector and is absorbed by the first light absorbing material. By reflecting and absorbing the incident laser multiple times, the light absorbing ability of the light trapping device is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of optics, and in particular to a novel light trapping device. Background Art

[0002] At present, the main methods for detecting the concentration of dust particles in the air are contact measurement and non-contact measurement. Contact measurement methods include weighing method, sedimentation method, screening method, etc. Non-contact measurement methods include light scattering method and light transmission method. Although the weighing method has high precision, the detection method is complicated, the weighing environment is extremely high, it is time-consuming, wastes manpower, and cannot display the test results in real time, let alone achieve continuous detection. Therefore, although the optical method for measuring dust particles has lower accuracy than the weighing method, it has the advantages of real-time monitoring, short time consumption, labor saving, and continuous detection, so it is more suitable for application in industrial production and other occasions.

[0003] Principle of scattering dust particle counter: The laser light source emits laser, which passes through the light-sensitive area that intersects the airflow channel to cause MIE scattering, and the scattered light is irradiated onto the optical sensor. Because the dust particles have different sizes, the scattered light intensity generated by scattering is different, and the current generated is also different. After filtering and rectification, the weak current signal is converted and amplified into a voltage signal through a weak signal amplification circuit. Then the CPU identifies dust particles of different sizes according to the different strengths of the electrical pulse signals, and determines the number of particles according to the number of electrical pulses and finally counts them. The structure diagram is as follows Figure 5 As shown, the essential structure of the system is the light trap structure. However, the existing light trap structure has low light absorption capacity and there is a problem that the light is reflected back into the measurement system, causing a large background noise. Summary of the invention

[0004] The purpose of the present invention is to improve the deficiencies in the prior art and provide a new light trapping device.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A novel light trapping device, comprising:

[0007] A first reflector group, wherein the first reflector group includes at least one first reflector, and each first reflector includes a first reflective surface and a second reflective surface;

[0008] A second reflector group, wherein the second reflector group includes at least one second reflector, and each second reflector includes a third reflective surface and a fourth reflective surface;

[0009] The reflecting surface three is parallel to the reflecting surface two, and the reflecting surface four is parallel to the reflecting surface one; the back surface of each reflecting surface one, the back surface of the reflecting surface two, the back surface of the reflecting surface three, and the back surface of the reflecting surface four are provided with a first light absorbing material;

[0010] The reflective surface 1 of the first reflector is used to receive the incident laser and reflect the incident laser;

[0011] The reflective surface three of the second reflector is used to receive the incident laser reflected by the reflective surface one, and reflect the received incident laser to the reflective surface four;

[0012] The second reflecting surface of the first reflecting mirror is used to receive the incident laser reflected by the fourth reflecting surface, and reflect the received incident laser to the first reflecting surface of the next first reflecting mirror.

[0013] The incident laser is reflected back and forth between the first reflector group and the second reflector group, and each time the incident laser hits the reflecting surface, part of the laser passes through the reflector and is absorbed by the first light-absorbing material. By reflecting and absorbing the incident laser multiple times, the light-trapping device's ability to absorb light is greatly improved.

[0014] In a further embodiment, the reflecting surface one and the reflecting surface two are connected end to end to form a first reflecting mirror with a right angle, and the at least one first reflecting mirror is distributed in sequence along the incident direction of the incident laser; the reflecting surface three and the reflecting surface four are connected end to end to form a second reflecting mirror with a right angle, and the at least one second reflecting mirror is distributed in sequence along the incident direction of the incident laser.

[0015] In a further embodiment, the first reflective surface one and the second reflective surface are connected end to end and placed in parallel, and the first reflective mirror group as a whole forms a straight line structure; the third reflective surface three and the fourth reflective surface are connected end to end and placed in parallel, and the second reflective mirror group as a whole forms a straight line structure.

[0016] In a further solution, the first reflector group and the second reflector group are fixedly connected via a connecting member, and the connecting member includes a laser penetration surface, and the laser penetration surface is arranged perpendicular to the incident laser.

[0017] In a further solution, the connecting member is made of transparent glass.

[0018] In a further solution, the tail end of the second reflector group or the tail end of the first reflector group is connected to a second light absorbing material for absorbing the incident laser reflected by the last reflective surface.

[0019] In a further embodiment, the second light absorbing material is a black light absorbing material, which improves the light absorbing capacity of the second light absorbing material.

[0020] In a further solution, the first reflector group is fixedly connected to the second reflector group via the second light absorbing material, so that the first reflector group and the second reflector group are relatively fixed while absorbing the incident laser reflected by the last reflective surface.

[0021] In a further solution, each of the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface is a black reflecting surface, thereby enhancing the light absorption capacity of the reflector.

[0022] In a further embodiment, the first light absorbing material is a black light absorbing material, which improves the light absorbing capacity of the first light absorbing material.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The incident laser is reflected back and forth between the first reflector group and the second reflector group. Each time the incident laser hits the reflective surface, part of the laser passes through the reflector and is absorbed by the first light-absorbing material. By reflecting and absorbing the incident laser multiple times, the light-trapping device's ability to absorb light is greatly improved.

[0025] 2. The first reflector group is fixedly connected to the second reflector group through the second light absorbing material, so that while absorbing the incident laser reflected by the last reflective surface, the first reflector group and the second reflector group are relatively fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic structural diagram of a novel light trapping device provided in Example 1 of the present invention;

[0028] Figure 2 A schematic structural diagram of a novel light trapping device provided in Example 2 of the present invention;

[0029] Figure 3 A schematic structural diagram of a novel light trapping device provided in Example 3 of the present invention;

[0030] Figure 4 A schematic structural diagram of a novel light trapping device provided in Example 4 of the present invention;

[0031] Figure 5 This is a schematic diagram of the principle of a scattering dust particle counter;

[0032] Description of symbols in the figure

[0033] A first reflector group 1 , a first reflector 2 , a first reflective surface 21 , a second reflective surface 22 , a second reflector group 3 , a second reflector 4 , a third reflective surface 41 , a fourth reflective surface 42 , a first light absorbing material 5 , a connecting piece 6 , and a second light absorbing material 7 . DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0035] See also Figure 1 This embodiment schematically discloses a novel light trapping device, comprising: a first reflector group 1, wherein the first reflector group 1 comprises at least one first reflector 2, each of which comprises a reflective surface 1 21 and a reflective surface 22; a second reflector group 3, wherein the second reflector group 3 comprises at least one second reflector 4, each of which comprises a reflective surface 3 41 and a reflective surface 42.

[0036] In this solution, the back of each reflection surface 1 21, the back of reflection surface 2 22, the back of reflection surface 3 41, and the back of reflection surface 4 42 are all provided with a first light absorbing material 5. At the same time, the reflection surface 3 41 is parallel to the reflection surface 2 22, and the reflection surface 4 42 is parallel to the reflection surface 1 21.

[0037] And in this scheme, the reflection surface one and the reflection surface two are connected head to tail to form a first reflection mirror with a right angle, and the at least one first reflection mirror is distributed in sequence along the incident direction of the incident laser; the reflection surface three and the reflection surface four are connected head to tail to form a second reflection mirror with a right angle, and the at least one second reflection mirror is distributed in sequence along the incident direction of the incident laser. By making the angle between the reflection surface one and the reflection surface two right angles, and the angle between the reflection surface three and the reflection surface four right angles, it is ensured that the incident laser can be cyclically reflected in the light trapping device and thus absorbed by the light absorbing material, preventing the incident laser from being emitted from the light trapping device after multiple reflections on the reflection surface. It is easy to understand that, under the condition of ensuring that the incident laser will not be emitted from the light trapping device after multiple reflections in the light trapping device, the angle between the reflection surface one and the reflection surface two is not limited, nor is the angle between the reflection surface three and the reflection surface four.

[0038] In the novel light trapping device:

[0039] The reflection surface 1 21 of the first first reflector 2 receives the incident laser and reflects the incident laser; the reflection surface 3 41 of the first second reflector 4 receives the incident laser reflected by the reflection surface 1 21 of the first first reflector 2, and reflects the received incident laser to the reflection surface 4 42; the reflection surface 22 of the first first reflector is used to receive the incident laser reflected by the reflection surface 4 42, and reflects the received incident laser to the reflection surface 1 21 of the next first reflector 2, and the cycle is repeated until the incident laser is reflected by the last reflection surface.

[0040] The incident laser is reflected back and forth between the first reflector group 1 and the second reflector group 3, and each time the incident laser is incident on the reflecting surface, it is easy to understand that while the reflector reflects the light beam, part of the laser passes through the reflector and is absorbed by the first light-absorbing material 5. By reflecting and absorbing the incident laser multiple times, the ability of the light trapping device to absorb light is greatly improved.

[0041] In a further embodiment, the first reflector group 1 and the second reflector group 3 are fixedly connected by a connector 6, and the connector 6 includes a laser penetration surface, and the laser penetration surface is arranged perpendicular to the incident laser. In order to reduce the influence of the connector 6 on the optical path of the incident laser, the connector 6 is made of transparent glass.

[0042] In addition, in this embodiment, the first light absorbing material 5 is a black light absorbing material, which improves the light absorbing ability of the first light absorbing material 5. Moreover, each of the reflection surface 1 21, the reflection surface 22, the reflection surface 3 41, and the reflection surface 4 42 is a black reflection surface, which enhances the light absorbing ability of the reflector.

[0043] Example 2

[0044] See also Figure 2 The present embodiment schematically discloses a novel light trapping device, comprising: a first reflector group 1, the first reflector group 1 comprising at least one first reflector 2, each first reflector 2 comprising a reflective surface 1 21 and a reflective surface 2 22, the reflective surface 1 21 and the reflective surface 2 22 forming a first reflector 2 with an angle, and the at least one first reflector 2 is sequentially distributed along the incident direction of the incident laser; a second reflector group 3, the second reflector group 3 comprising at least one second reflector 4, each second reflector 4 comprising a reflective surface 3 41 and a reflective surface 42, the reflective surface 3 41 and the reflective surface 4 42 forming a second reflector 4 with an angle, and the at least one second reflector 4 is sequentially distributed along the incident direction of the incident laser; and further comprising a second light absorbing material 7, the second light absorbing material 7 being connected to the tail end of the second reflector group or the tail end of the first reflector group, and being used to absorb the incident laser reflected by the last reflective surface.

[0045] In this solution, the back of each reflective surface 1, the back of each reflective surface 2, the back of each reflective surface 3, and the back of each reflective surface 4 are provided with a first light absorbing material. As a preferred embodiment, each reflective surface 1 21, reflective surface 22, reflective surface 3 41, and reflective surface 4 42 is a black reflective surface, which enhances the light absorbing ability of the reflector.

[0046] And in this scheme, the reflection surface one and the reflection surface two are connected head to tail to form a first reflection mirror with a right angle, and the at least one first reflection mirror is distributed in sequence along the incident direction of the incident laser; the reflection surface three and the reflection surface four are connected head to tail to form a second reflection mirror with a right angle, and the at least one second reflection mirror is distributed in sequence along the incident direction of the incident laser. By making the angle between the reflection surface one and the reflection surface two right angles, and the angle between the reflection surface three and the reflection surface four right angles, it is ensured that the incident laser can be cyclically reflected in the light trapping device and thus absorbed by the light absorbing material, preventing the incident laser from being emitted from the light trapping device after multiple reflections on the reflection surface. It is easy to understand that, under the condition of ensuring that the incident laser will not be emitted from the light trapping device after multiple reflections in the light trapping device, the angle between the reflection surface one and the reflection surface two is not limited, nor is the angle between the reflection surface three and the reflection surface four.

[0047] In the novel light trapping device:

[0048] The reflection surface 1 21 of the first first reflector 2 receives the incident laser and reflects the incident laser; the reflection surface 3 41 of the first second reflector 4 receives the incident laser reflected by the reflection surface 1 21 of the first first reflector 2, and reflects the received incident laser to the reflection surface 4 42; the reflection surface 22 of the first first reflector is used to receive the incident laser reflected by the reflection surface 4 42, and reflects the received incident laser to the reflection surface 1 21 of the next first reflector 2, and the cycle is repeated until the incident laser is reflected by the last reflection surface, and the second light-absorbing material 7 receives and absorbs the incident laser reflected by the last reflection surface.

[0049] The incident laser is reflected back and forth between the first reflector group 1 and the second reflector group 3, and each time the incident laser is incident on the reflecting surface, it is easy to understand that while the reflector reflects the light beam, part of the laser passes through the reflector and is absorbed by the first light-absorbing material 5. After the incident laser is reflected multiple times and repeatedly absorbed by the first light-absorbing material, the remaining laser is absorbed by the second light-absorbing material 7, thereby improving the light absorption capacity of the light trapping device.

[0050] At the same time, the reflection surface three 41 is parallel to the reflection surface two 22 , and the reflection surface four 42 is parallel to the reflection surface one 21 .

[0051] In addition, in this embodiment, the first light absorbing material 5 is a black light absorbing material, which improves the light absorbing ability of the first light absorbing material 5. And the second light absorbing material 7 is also a black light absorbing material, which improves the light absorbing ability of the second light absorbing material 7. It is easy to understand that, under the condition of ensuring that the first light absorbing material and the second light absorbing material can absorb laser, other existing light absorbing materials can also be used.

[0052] As a preferred embodiment, the first reflector group 1 is fixedly connected to the second reflector group 3 through the second light absorbing material 7. This ensures that the first reflector group 1 and the second reflector group 3 are relatively fixed while absorbing the incident laser reflected by the last reflective surface. It is easy to understand that when ensuring that the second light absorbing material 7 can simultaneously receive and absorb the lasers reflected by the first reflector group 1 and the second reflector group 3, the structural size of the second light absorbing material 7 is not limited.

[0053] Example 3

[0054] See also Figure 3 The main difference between this embodiment 3 and the above-mentioned embodiment 1 is that the reflection surface 1 21 and the reflection surface 2 22 are connected end to end and placed in parallel, and the first reflection mirror group 1 as a whole forms a straight line structure; the reflection surface 3 41 and the reflection surface 4 42 are connected end to end and placed in parallel, and the second reflection mirror group 3 as a whole forms a straight line structure.

[0055] Example 4

[0056] See also Figure 4 The main difference between this embodiment 4 and the above-mentioned embodiment 2 is that the reflection surface 1 21 and the reflection surface 2 22 are connected end to end and placed in parallel, and the first reflection mirror group 1 as a whole forms a straight line structure; the reflection surface 3 41 and the reflection surface 4 42 are connected end to end and placed in parallel, and the second reflection mirror group 3 as a whole forms a straight line structure.

[0057] Although in the above-mentioned embodiments, the light trapping device only contains three first reflectors 2 and three second reflectors 4, it is easy to understand that, under the condition of ensuring that the incident laser is completely absorbed by the light trapping device, there is no limit on the number of the first reflectors 2 and the second reflectors 4, and the number can be one, two, four or more than four.

[0058] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel light trapping device, characterized in that: include: A first reflector group, wherein the first reflector group includes at least one first reflector, and each first reflector includes a first reflective surface and a second reflective surface; A second reflector group, wherein the second reflector group includes at least one second reflector, and each second reflector includes a third reflective surface and a fourth reflective surface; The reflecting surface three is parallel to the reflecting surface two, and the reflecting surface four is parallel to the reflecting surface one; the back surface of each reflecting surface one, the back surface of the reflecting surface two, the back surface of the reflecting surface three, and the back surface of the reflecting surface four are provided with a first light absorbing material; The reflective surface 1 of the first reflector is used to receive the incident laser and reflect the incident laser; The reflective surface three of the second reflector is used to receive the incident laser reflected by the reflective surface one, and reflect the received incident laser to the reflective surface four; The second reflective surface of the first reflector is used to receive the incident laser reflected by the fourth reflective surface, and reflect the received incident laser to the first reflective surface of the next first reflector; The first reflective surface and the second reflective surface are connected end to end to form a first reflective mirror with a right angle, and the at least one first reflective mirror is distributed in sequence along the incident direction of the incident laser; the third reflective surface and the fourth reflective surface are connected end to end to form a second reflective mirror with a right angle, and the at least one second reflective mirror is distributed in sequence along the incident direction of the incident laser; the tail end of the second reflective mirror group or the tail end of the first reflective mirror group is connected to a second light-absorbing material for absorbing the incident laser reflected by the last reflective surface.

2. The novel light trapping device according to claim 1, characterized in that: The first reflective surface and the second reflective surface are connected end to end and placed in parallel, and the first reflective mirror group as a whole forms a straight line structure; the third reflective surface and the fourth reflective surface are connected end to end and placed in parallel, and the second reflective mirror group as a whole forms a straight line structure.

3. The novel light trapping device according to claim 1, characterized in that: The first reflector group and the second reflector group are fixedly connected via a connecting member, and the connecting member comprises a laser penetration surface, and the laser penetration surface is arranged perpendicular to the incident laser.

4. The novel light trapping device according to claim 3, characterized in that: The connecting piece is made of transparent glass.

5. The novel light trapping device according to claim 4, characterized in that: The second light absorbing material is a black light absorbing material.

6. The novel light trapping device according to claim 1, characterized in that: The first reflector group is fixedly connected to the second reflector group through the second light absorbing material.

7. The novel light trapping device according to claim 1, characterized in that: Each of the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface is a black reflecting surface.

8. The novel light trapping device according to claim 1, characterized in that: The first light absorbing material is a black light absorbing material.

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