CN218974165U

CN218974165U - Multi-hole collimating lens with long working distance

Info

Publication number: CN218974165U
Application number: CN202223117955.4U
Authority: CN
Inventors: 魏博; 方正勇
Original assignee: Shandong Ruifeng Photoelectric Technology Co ltd
Current assignee: Shandong Ruifeng Photoelectric Technology Co ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-05-05
Anticipated expiration: 2032-11-23

Abstract

The utility model discloses a multi-hole collimating lens with a long working distance, which comprises an inlet glass tube arranged at one end; an inlet glass capillary is sleeved in the inlet glass tube; an inlet optical fiber is connected to the outer side of the inlet glass capillary; an inlet Clens is connected to one side of the inlet glass capillary tube, which is positioned in the inlet glass tube; the inlet glass tube is fixed at one end of the porous steel tube through UV glue; the other end of the porous steel tube is connected with an outlet glass tube through UV glue; the outlet glass tube is positioned in the porous steel tube and is provided with an outlet Clens; an outlet glass capillary is connected to the outer side of the outlet Clens; and the outlet glass capillary tube is externally connected with an outlet optical fiber. The equipment can be applied to the field of methane gas detection, and has a simple structure and is convenient for mass production.

Description

Multi-hole collimating lens with long working distance

Technical Field

The utility model belongs to the field of photoelectricity, and particularly relates to a porous collimating lens with a long working distance.

Background

Too high methane concentration can cause explosion accidents in the mining and industrial fields, so that the real-time monitoring of methane gas concentration has important significance for safe production. Along with the increasing requirements for gas detection in coal mine enterprises, the traditional equipment for detecting the concentration of methane gas is more and more difficult to meet the requirements for accurate measurement, and the rising of optical fiber sensing makes the measurement of the concentration of methane gas by a spectrum absorption method an important direction of current research.

The utility model adopts a two-port structure, the working distance is 60mm, the working distance is doubled compared with that of the conventional product, the used raw materials are of the common type, the industrial production is convenient, and the cost is low.

Disclosure of Invention

The utility model provides a porous collimating lens with a long working distance, which can be applied to the field of methane gas detection and has a simple structure and is convenient for mass production.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a long working distance multi-aperture collimator comprising an inlet glass tube disposed at one end; an inlet glass capillary is sleeved in the inlet glass tube; an inlet optical fiber is connected to the outer side of the inlet glass capillary; an inlet Clens is connected to one side of the inlet glass capillary tube, which is positioned in the inlet glass tube; the inlet glass tube is fixed at one end of the porous steel tube through UV glue; the other end of the porous steel tube is connected with an outlet glass tube through UV glue; the outlet glass tube is positioned in the porous steel tube and is provided with an outlet Clens; an outlet glass capillary is connected to the outer side of the outlet Clens; and the outlet glass capillary tube is externally connected with an outlet optical fiber.

Preferably, the length of the porous steel tube is 60mm.

Preferably, the outlet optical fiber and the inlet optical fiber are provided as ZBL optical fibers.

Preferably, the end faces of the inlet glass capillary and the outlet glass capillary are ground to be octave angles, and an antireflection film is plated.

Compared with the prior art, the utility model has the beneficial effects that: the multi-hole collimating lens with long working distance for the air chamber is realized, firstly, the bending insensitive ZBL optical fiber is used, the diameter of a coil of the fiber can be reduced, the system space is saved, and the miniaturization of the system is easy to realize; secondly, customizing a bracket for methane gas detection in specific occasions; thirdly, the structure is simple, materials and equipment are commonly used for production, the process operability is strong, and the mass production is convenient; fourth, the steel pipe with long working distance is customized, so that the needed multi-hole collimating lens can be reduced by half, and the cost of the detection system can be reduced.

Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is apparent that the drawings in the following description are only embodiments of the present disclosure, and other drawings may be obtained from the provided drawings without inventive effort to those of ordinary skill in the art.

FIG. 1 is a cross-sectional view of a multi-aperture collimating mirror of the present utility model;

in the figure: 1. inlet glass capillary, 2, inlet glass tube, 3, inlet Clens,4, porous steel tube, 5, UV glue, 6, outlet optical fiber, 7, inlet optical fiber, 8, outlet Clens,9, outlet glass capillary, 10, outlet glass tube.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1, the present utility model provides a technical solution: a multi-hole collimating lens with long working distance, which comprises an inlet glass tube 2 arranged at one end; an inlet glass capillary 1 is sleeved in the inlet glass tube 2; an inlet optical fiber 7 is connected to the outer side of the inlet glass capillary 1; an inlet Clens3 is connected to one side of the inlet glass capillary 1 positioned in the inlet glass tube 2; the inlet glass tube 2 is fixed at one end of the porous steel tube 4 through UV glue 5; the other end of the porous steel tube 4 is connected with an outlet glass tube 10 through UV glue 5; an outlet Clens8 is arranged in the porous steel tube 4 by an outlet glass tube 10; the outside of the outlet Clens8 is connected with an outlet glass capillary 9; the outlet glass capillary 9 is connected to the outlet optical fiber 6 outwards.

The length of the porous steel tube 4 is 60mm. The exit optical fiber 6 and the entrance optical fiber 7 are provided as ZBL optical fibers. The end faces of the inlet glass capillary 1 and the outlet glass capillary 9 are ground into octave angles, and an antireflection film is plated.

Where Clens refers to a collimating lens, which refers to an instrument that converts light from each point in the aperture stop into a parallel beam of collimated light. ZBL optical fiber refers to fluoride optical fiber, which is made of fluoride glass and mainly works in optical transmission service with wavelength of 2-10 μm. Compared with chalcogenide glass optical fibers, fluoride optical fibers have higher doping concentrations and intensities, as well as high stability and low background losses.

The porous collimating mirror mainly comprises a glass capillary tube, a glass tube, clens, a porous steel tube, an optical fiber and UV glue, and a bracket can be arranged in some embodiments. The glass capillary is fixed in the glass tube, the end face of the glass capillary is ground to an octave angle, an antireflection film is plated, the glass capillary, the Clens and the glass tube are bonded by epoxy glue to form a collimation unit, light transmitted in the optical fiber is converted into collimated light by the collimation unit and then is transmitted into the porous steel tube 4, after passing through an internal gas cavity, a light beam is coupled into the optical fiber through a second collimation unit and enters a subsequent detection unit, and the core piece porous collimation lens is fixed in a customized bracket by the epoxy glue and is used for methane gas detection in specific occasions.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A porous collimating mirror with long working distance is characterized in that: the porous collimating mirror comprises an inlet glass tube (2) arranged at one end; an inlet glass capillary tube (1) is sleeved in the inlet glass tube (2); an inlet optical fiber (7) is connected to the outer side of the inlet glass capillary tube (1); an inlet Clens (3) is connected to one side of the inlet glass capillary tube (1) positioned in the inlet glass tube (2); the inlet glass tube (2) is fixed at one end of the porous steel tube (4) through UV glue (5); the other end of the porous steel tube (4) is connected with an outlet glass tube (10) through UV glue (5); the outlet glass tube (10) is positioned in the porous steel tube (4) and is provided with an outlet Clens (8); an outlet glass capillary tube (9) is connected to the outer side of the outlet Clens (8); the outlet glass capillary tube (9) is connected with an outlet optical fiber (6) outwards.

2. The long working distance multi-aperture collimator of claim 1, wherein: the length of the porous steel tube (4) is 60mm.

3. The long working distance multi-aperture collimator of claim 1, wherein: the outlet optical fiber (6) and the inlet optical fiber (7) are arranged as ZBL optical fibers.

4. The long working distance multi-aperture collimator of claim 1, wherein: the end faces of the inlet glass capillary tube (1) and the outlet glass capillary tube (9) are ground to an octave angle, and an antireflection film is plated.