A light sensing device that can detect tiny light spots and is less affected by the direction of incident light

Abstract

The present invention discloses a light sensing device capable of detecting tiny light spots and having little influence on the direction of incident light, comprising a light collecting head, a light intensity detector and a transmission optical fiber; the light collecting head comprises a base with a fluorescent coating layer coated on the outer surface and a light-transmitting packaging layer which is sleeved on the base and used to seal the fluorescent coating layer; the present invention solves the technical problems that existing light sensors are unable to detect the light intensity of tiny local points, are greatly affected by the direction of incident light when collecting incident light, and require complex remote power supply circuits and communication circuits when working; the present invention collects incident light by means of fluorescence conversion, and the light collecting head is little affected by the direction of incident light when collecting light; and the structure of the present invention can make the volume of the light collecting head very small, so that the light intensity of tiny local points can be detected; when working remotely, the present invention can set the light intensity detector at the near end, and remote light collection can be achieved without the need for complex remote power supply circuits and communication circuits.

Description

Technical Field

[0001] The present invention relates to a light sensing device, in particular to a light sensing device capable of detecting tiny light spots and having little influence from the direction of incident light. Background Art

[0002] In some applications, it is necessary to detect blue light in the scene, such as environmental "blue light hazards", monitoring of blue light in the air or underwater, local light intensity detection, etc. Ordinary detectors without spectral detection functions are not easy to achieve this. Even if it can be achieved on land, it is difficult to use it conveniently in air, underwater and other environments.

[0003] In applications such as underwater blue-light communications and lighting, outgoing light monitoring is often achieved through fiber coupling, which couples a portion of the incoming light into an optical fiber for transmission to a control center. However, fiber coupling systems are complex, require high alignment accuracy, and have strict requirements for the direction of the incoming light, making underwater operation very inconvenient. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art and provide a light sensing device that can detect tiny light spots and is less affected by the direction of incident light. It solves the technical problems that the light sensors in the prior art cannot detect the light intensity of tiny local points, are greatly affected by the direction of incident light when collecting incident light, and require complex remote power supply circuits and communication circuits when working.

[0005] To achieve the above-mentioned objectives, the present invention provides a light sensing device capable of detecting tiny light spots and being minimally affected by the direction of incident light, comprising a light collection head, a light intensity detector, and a transmission optical fiber connecting the light collection head and the light intensity detector signals; the light collection head comprises a substrate having an outer surface coated with a fluorescent coating layer, and a light-transmitting packaging layer that is sleeved on the substrate and is used to seal the fluorescent coating layer; the transmission optical fiber is connected to the substrate.

[0006] Preferably, the outer surface of the substrate is provided with multiple recessed etching grooves, and the surfaces of the etching grooves are also coated with a fluorescent coating layer.

[0007] Preferably, the substrate is a colorless and transparent glass or quartz member.

[0008] Preferably, the substrate is the end of the transmission optical fiber.

[0009] Preferably, the fluorescent coating layer is a perovskite single crystal or polycrystalline.

[0010] Preferably, the molecular formula of the fluorescent coating layer is ABX3, wherein A is a cation, B is Pb or Sn, and X is a halogen element.

[0011] Preferably, the encapsulation layer is a glass component or optical plastic.

[0012] Preferably, the transmission optical fiber is a multimode quartz optical fiber.

[0013] Preferably, the length of the transmission optical fiber is 0.1m to 1000m.

[0014] Preferably, the substrate and the transmission optical fiber are connected by gluing or bonding.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention collects incident light by means of fluorescence conversion. The light collecting head is little affected by the direction of the incident light when collecting light. Even if the working environment is underwater, it will not affect the light collecting head's lighting.

[0017] (2) The structure of this technical solution can make the volume of the light collection head very small, and can detect the light intensity of a small local point;

[0018] (3) When working remotely, this technical solution can set the light intensity detector at the near end, and remote light collection can be achieved without the need for complex remote power supply circuits and communication circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a light sensing device provided by the present invention that can detect tiny light spots and is less affected by the direction of incident light;

[0021] Figure 2 The present invention provides a schematic structural diagram of a light collection head of a light sensing device capable of detecting tiny light spots and having little influence from the direction of incident light. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] like Figure 1 and Figure 2 As shown, the present invention provides a light sensing device that can detect tiny light spots and is less affected by the direction of incident light. The light sensing device includes a light collection head 1, a light intensity detector 3, and a transmission optical fiber 2 that connects the light collection head 1 and the light intensity detector 3 signals.

[0024] The light collection head 1 includes a substrate 1-1 coated with a fluorescent coating 1-2, and a translucent encapsulation layer 1-3 disposed on the substrate 1-1 and used to seal the fluorescent coating 1-2. The transmission optical fiber 2 is connected to the substrate 1-1, and the encapsulation layer 1-3 is disposed in close contact with the surface of the substrate 1-1. The encapsulation layer 1-3 is preferably a transparent glass component or optical plastic. The encapsulation layer 1-3 provides protection by isolating dust and water from the air, preventing the external environment from affecting the fluorescent coating 1-2 of the light collection head 1, thereby extending the service life of the optical sensing device. In this embodiment, the transmission optical fiber 2 is preferably a multimode quartz optical fiber with a length of 0.1m to 1000m. The substrate 1-1 and the transmission optical fiber 2 are connected by gluing or bonding. Preferably, the substrate 1-1 is connected to the end of the transmission optical fiber 2.

[0025] During operation, the light collection head 1 receives blue, purple or ultraviolet incident light. The fluorescent coating layer 1-2 therein will generate 500-600nm fluorescence under the excitation of the incident light. Part of the fluorescence enters the transmission optical fiber 2 and is transmitted to the light intensity detector 3. After calibration of the light intensity detector 3, the intensity of the incident light can be indirectly measured, and the intensity of the light source can be remotely qualitatively or quantitatively detected. The optical sensing device can be easily used in environments such as on land, in the air, and even underwater.

[0026] Specifically, the technical solution provided by the present invention collects incident light through fluorescence conversion. Compared with the traditional complex optical fiber coupling method that couples part of the incident light into the optical fiber and then transmits it to the control center, the light collection head 1 is less affected by the direction of the incident light when collecting light. Even if the working environment is underwater, it will not affect the lighting of the light collection head 1. Moreover, the structure of the present technical solution can make the volume of the light collection head 1 very small, and can detect the light intensity of a tiny local point. In addition, when working remotely, the present technical solution can set the light intensity detector 3 at the near end, and remote light collection can be achieved without the need for complex remote power supply circuits and communication circuits.

[0027] More specifically, in this embodiment, the outer surface of the substrate 1-1 is provided with multiple recessed etched grooves 1-4, and the surface of the etched grooves 1-4 is also coated with a fluorescent coating layer 1-2. By providing the etched grooves 1-4 on the outer surface of the substrate 1-1, the coating amount of the fluorescent coating layer 1-2 can be increased, thereby increasing the signal light gain. In addition, the substrate 1-1 is preferably a colorless and transparent glass or quartz component, and the outer shape of the substrate 1-1 is preferably a columnar. The fluorescent coating layer 1-2 is a perovskite single crystal or polycrystalline, and the molecular formula of the fluorescent coating layer 1-2 is ABX3, wherein A is a cation, B is Pb or Sn, X is a halogen element such as Cl, Br or I, and the fluorescent coating layer 1-2 is also Ce. 3+ Doped YAG phosphor and its binder.

[0028] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A light sensing device capable of detecting tiny light spots and having little influence on the direction of incident light, characterized in that: It includes a light collection head (1), a light intensity detector (3), and a transmission optical fiber (2) for connecting the light collection head (1) and the light intensity detector (3) signals; The light collection head (1) comprises a substrate (1-1) whose outer surface is coated with a fluorescent coating layer (1-2), and a light-transmitting packaging layer (1-3) which is sleeved on the substrate (1-1) and used to seal the fluorescent coating layer (1-2); the substrate (1-1) is connected to the transmission optical fiber (2) by gluing or bonding, and the substrate (1-1) is the end of the transmission optical fiber (2); The fluorescent coating layer (1-2) is a perovskite single crystal or polycrystalline, and the molecular formula of the fluorescent coating layer (1-2) is ABX3, wherein A is a cation, B is Pb, and X is a halogen element; Concave etching grooves (1-4) are provided at multiple locations on the outer surface of the substrate (1-1), and the surfaces of the etching grooves (1-4) are also coated with a fluorescent coating layer (1-2).

2. The optical sensing device capable of detecting tiny light spots and having little influence on the direction of incident light according to claim 1, characterized in that: The substrate (1-1) is a colorless and transparent glass or quartz component.

3. The optical sensing device capable of detecting tiny light spots and having little influence on the direction of incident light according to claim 1, characterized in that: The encapsulation layers (1-3) are glass components or optical plastics.

4. The optical sensing device capable of detecting tiny light spots and having little influence on the direction of incident light according to claim 1, characterized in that: The transmission optical fiber (2) is a multimode quartz optical fiber.

5. The optical sensing device capable of detecting tiny light spots and having little influence on the direction of incident light according to claim 1, characterized in that: The length of the transmission optical fiber (2) is 0.1m to 1000m.

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