WO2020000776A1

WO2020000776A1 - Optical apparatus

Info

Publication number: WO2020000776A1
Application number: PCT/CN2018/110049
Authority: WO
Inventors: 绪海波
Original assignee: 昂纳信息技术（深圳）有限公司
Priority date: 2018-06-29
Filing date: 2018-10-12
Publication date: 2020-01-02
Also published as: CN108957774A

Abstract

The present invention relates to the field of optical devices, and specifically relates to an optical apparatus. The optical apparatus comprises a first light transmission end, an attenuation tab, and a second light transmission end; the attenuation tab comprises a light absorption and attenuation material layer and a light transmissive layer provided inside the light attenuation material layer; a light propagation path is constituted between the first light transmission end and the second light transmission end; the attenuation tab is provided on the light propagation path. By designing the optical apparatus and providing the attenuation tab having the light transmissive layer, the present invention shortens the distance between the first light transmission end and the second light transmission end, realizes device miniaturization, further improves light absorption, realizes the high directionality of laser transmission, reduces the costs, and facilitates mass production.

Description

Optical device

Technical field

The present invention relates to the field of optical devices, and in particular, to an optical device.

Background technique

Regarding the phenomenon of diffuse reflection in the propagation of light beams, it is generally achieved by the small hole block and the length of the optical path to reduce the diffuse reflection phenomenon.

In particular, Tap PD, which is a light detector, also known as "light detector", is the first part of an optical receiver and an important part of the optical fiber sensor. Its performance index will directly affect the performance of the sensor. At the light transmission end of Tap PD, the tap PD is highly directional by blocking light through a small hole and extending the distance between the detection end of the Tap PD and the internal lens. The directionality of the beam is evaluated by the plane divergence angle θ, θ angle. The smaller the light beam divergence, the better the directivity. If the angle θ approaches zero, it can be approximately called "parallel light". The light emitted by various ordinary light sources is non-directional and radiates to all directions in space. Although the laser beam has high directivity, in order to transmit over long distances or to pursue higher directivity, it is often necessary to lengthen the detection end of Tap PD and Internal lens distance is achieved.

However, the above structure does not meet the development trend in the demand for increasingly miniaturization of devices, and will cause high costs.

technical problem

The technical problem to be solved by the present invention is to provide an optical device aiming at the above-mentioned shortcomings of the prior art, to overcome the problem that it is difficult to meet the miniaturization requirements of the device due to the high directivity required.

Technical solutions

The technical solution adopted by the present invention to solve its technical problem is to provide an optical device including a first optical transmission end, an attenuation sheet, and a second optical transmission end. The attenuation sheet includes a light absorption attenuation material layer and is disposed on the light attenuation material. A light-transmitting layer in the middle of the layer, a light transmission path is formed between the first light transmission end and the second light transmission end, and the attenuation sheet is disposed on the light transmission path.

Among them, a preferred solution is that the light transmitting layer is a light through hole.

Among them, a preferred solution is that the light transmitting layer is an AR film layer.

Among them, a preferred solution is that the optical device includes a casing, the first light transmission end and the second light transmission end are respectively disposed in the casing, and the light propagation path is disposed in an inner cavity of the casing.

Among them, a preferred solution is that the second optical transmission end includes a light detection acquisition end that collects a light beam that has passed through the light transmitting layer of the attenuation sheet.

Among them, a preferred solution is that the light detecting and collecting end includes one of a photomultiplier tube, a pyroelectric detector, and a semiconductor light detector.

Among them, a preferred solution is that the optical device further includes a power detection module disposed at the light detection acquisition end.

Among them, a preferred solution is that the first optical transmission end includes an optical fiber connector, the optical fiber connector is connected to an external optical fiber, and the external optical fiber communicates with the inner cavity of the housing through the optical fiber connector.

Among them, a preferred solution is that the first optical transmission end further includes a G-lens and a filter disposed between the optical fiber connector and the attenuating sheet.

Among them, a preferred solution is that the optical fiber connector is a dual-fiber pigtail.

Beneficial effect

The beneficial effect of the present invention is that, compared with the prior art, the present invention realizes the miniaturization of the device by designing an optical device and providing an attenuating sheet with a light transmitting layer to reduce the distance between the first optical transmission end and the second optical transmission end. Further, improve light absorption, realize high directivity of laser transmission, reduce costs, and facilitate mass production.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below with reference to the accompanying drawings and embodiments. In the drawings:

FIG. 1 is a schematic structural diagram of an optical device according to the present invention;

2 is a schematic structural diagram of an attenuation sheet according to the present invention;

FIG. 3 is a detailed structural diagram of FIG. 1.

Best Mode of the Invention

A preferred embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the present invention provides a preferred embodiment of an optical device. Zh

An optical device includes a first light transmission end 110, an attenuation sheet 120, and a second light transmission end 130. The attenuation sheet 120 includes a light absorption attenuation material layer 121 and a light transmitting layer 122 disposed in the middle of the light attenuation material layer. The first optical transmission end 110 and the second optical transmission end 130 constitute a light propagation path, and the attenuation sheet 120 is disposed on the light propagation path. Among them, it refers to such a sheet-shaped element that is made into a sheet shape by using the absorption characteristic of a substance and placed on an optical path to attenuate light intensity.

Specifically, a light propagation path is formed between the first optical transmission end 110 and the second optical transmission end 130, and a light beam may be input through the first optical transmission end 110 and incident on the second optical transmission end 130 through the light propagation path, Or the light beam is input through the second light transmitting end 130 and enters the first light transmitting end 110 through the light propagation path; at the same time, the attenuating sheet 120 is disposed in the light propagation path and can be set close to the first light transmitting end 110. It can be set close to the second optical transmission end 130, and it mainly refers to the change of the divergence angle of the light beam in the light propagation path.

Preferably, the light beam is preferably a laser beam, and the laser beam has a large directivity, which can further optimize the internal structure of the optical device, further improve light absorption, achieve high directivity of laser transmission, and reduce costs. Facilitate mass production.

Further, the attenuating sheet 120 is provided in two layers, the inner and outer layers, the main purpose of which is to filter the light beam incident on the corresponding transmission end. The outer layer is a layer of light attenuating material, which can effectively absorb the light beam. Among them, the light attenuation, the correct expression is that the light quantum Energy decay. The decay of the energy E of the light quantum means a decrease in the frequency v. The outer layer is a light-transmitting layer 122 that facilitates light transmission. When a light beam is incident on the attenuation sheet 120, only the light passing through the light-transmitting layer 122 can be effectively transmitted.

In order to improve the directivity of the light beam, the light-transmitting layer 122 may be a small hole in the middle of the attenuation sheet 120. The size of the small hole depends on the degree of directivity needed. The smaller the small hole, the higher the directivity. Of course, the light transmittance The lower it is.

In this embodiment, two schemes of the light transmitting layer 122 are provided.

In the first solution, the light-transmitting layer 122 is a light-passing hole, and the light-passing hole may also be set as a transparent material to realize the airtightness of the device.

Solution 2: The light-transmitting layer 122 is an AR film layer. First, a through hole can be set, and an AR protective film can be provided on the through hole. Among them, the AR protective film is currently the best screen protector on the market. AR is a synthetic material, which is generally divided into three layers. Silicone is used for adsorption. Layer, PET is the middle layer, and the outer layer is a special treatment layer. Secondly, a through hole can be set and the transparent material is embedded in the hole, and then the AR material is plated on the surface of the transparent material, preferably AR coated glass, which is a kind of glass The glass with special treatment on the surface is based on the principle that high-quality glass is processed on one or both sides. Compared with ordinary glass, it has a lower reflectance and reduces the light reflectivity to less than 1%. In the visible light range of ordinary glass, its single-sided reflectance is about 4%. The total spectral reflectance is approximately 8%.

In this embodiment, the optical device includes a casing 100, the first light transmission end 110 and the second light transmission end 130 are respectively disposed in the casing 100, and the light propagation path is disposed in the casing 100 Cavity.

Further, the housing 100 is provided with various connection structures, which facilitates the installation of the first optical transmission end 110 and the second optical transmission end 130 and the attenuating sheet 120 to achieve an integrated setting.

As shown in FIG. 3, the present invention provides a preferred embodiment of an optical device.

In this embodiment, the second optical transmission end 130 includes a light detection acquisition end that collects a light beam that passes through the light transmission layer 122 of the attenuating sheet 120, receives an external light beam, and preferably receives a laser signal that is emitted after being split.

Preferably, the light detection and collection end includes one of a photomultiplier tube, a pyroelectric detector, and a semiconductor light detector. Here, the photomultiplier tube, the pyroelectric detector, and the semiconductor photodetector are collection ports indicating corresponding photodetectors, or may be an integral part thereof. For example, the PD receiving end of a photodetector.

Among them, the photodetector can detect the optical power incident on the surface, and convert the change of the optical power into a corresponding current. Further, the optical device further includes a power detection module disposed at the light detection acquisition end to implement optical power detection. In addition, the first optical transmission end 110, the attenuating sheet 120, the light detection acquisition end, and the power detection module are all integrated and arranged in the same casing 100, thereby achieving a compact and integrated setting.

In this embodiment, the first optical transmission end 110 includes an optical fiber connector, the optical fiber connector is connected to an external optical fiber 111, and the external optical fiber communicates with the inner cavity of the housing 100 through the optical fiber connector.

Preferably, the optical fiber connector is a dual-fiber pigtail. Pigtails are also called pigtails. Only one end has a connector, and the other end is a broken end of the core of an optical cable. It is connected to the core of other optical cables by welding. It often appears in the fiber terminal box and is used to connect the optical cable to the optical transceiver (Also use couplers, jumpers, etc.).

In this embodiment, the first optical transmission end 110 further includes a G-lens 140 and a filter 150 disposed between the optical fiber connector and the attenuation sheet 120. In addition, through the G-lens 140 and the filter 150, the light beam received and sent to the inside of the housing 100 by the first optical transmission end 110 is effectively processed, and an attenuation sheet 120 is provided at a large divergence angle of the light beam, which will have high directivity. The light beam is incident into the second light transmitting end 130.

Among them, G-lens140 is a self-focusing lens, which realizes the convergence of light beams. The filter 150 is a light filter and realizes wavelength filtering.

The above setting can effectively improve the directivity of the light beam, and further reduce the distance between the first optical transmission end 110 and the second optical transmission end 130, thereby achieving a miniaturized setting.

The foregoing are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes or modifications made in accordance with the scope of patent application for the present invention are the present invention.

Claims

An optical device is characterized by comprising a first light transmitting end, an attenuating sheet and a second light transmitting end. The attenuating sheet includes a light absorbing attenuating material layer and a light transmitting layer disposed in the middle of the light attenuating material layer. An optical transmission path is formed between an optical transmission end and a second optical transmission end, and the attenuation sheet is disposed on the optical transmission path.
The optical device according to claim 1, wherein the light-transmitting layer is a light-passing hole.
The optical device according to claim 1, wherein the light transmitting layer is an AR film layer.
The optical device according to any one of claims 1 to 3, characterized in that: the optical device comprises a housing, the first light transmission end and the second light transmission end are respectively disposed in the housing, and the light propagation path It is arranged in the inner cavity of the casing.
The optical device according to claim 4, wherein the second light transmission end comprises a light detection acquisition end that collects a light beam passing through the light transmitting layer of the attenuation sheet.
The optical device according to claim 5, wherein the light detecting and collecting end comprises one of a photomultiplier tube, a pyroelectric detector, and a semiconductor light detector.
The optical device according to claim 5, wherein the optical device further comprises a power detection module disposed at a light detection acquisition end.
The optical device according to claim 5, wherein the first optical transmission end includes an optical fiber connector, the optical fiber connector is connected to an external optical fiber, and the external optical fiber communicates with the inner cavity of the housing through the optical fiber connector.
The optical device according to claim 8, wherein the first optical transmission end further comprises a G-lens and a filter disposed between the optical fiber connector and the attenuating sheet.
The optical device according to claim 8, wherein the optical fiber connector is a dual-fiber pigtail.