CN219573099U

CN219573099U - Double-path integrated optical fiber deflection probe

Info

Publication number: CN219573099U
Application number: CN202321098944.8U
Authority: CN
Inventors: 孙晓杰; 刘钊
Original assignee: Xi'an Feimiao Optical Fibre Technology Co ltd
Current assignee: Xi'an Feimiao Optical Fibre Technology Co ltd
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-08-22
Anticipated expiration: 2033-05-09

Abstract

The utility model relates to a double-path integrated optical fiber deflection probe, which comprises an optical fiber tail fiber A and an optical fiber tail fiber B which are respectively connected with one optical fiber end part, wherein the other end parts of the optical fiber tail fiber A and the optical fiber tail fiber B are sequentially attached and connected with a collimation lens group and a right angle surface of a right angle prism, and the optical fiber tail fiber A is parallel to the optical fiber tail fiber B; the double-path integrated optical fiber probe design is adopted, so that double-point detection, integration and miniaturization of the optical fiber sensing probe are realized, reflection characteristics of two points of a detected object are detected, and detection accuracy is improved. The optical fiber sensing probe is provided with one thousandth of monitoring light and is used for comparing with the measured light and referencing. The optical fiber probe adopts a self-focusing lens group, so that the emergent position and the detection precision of two paths of light are ensured while the whole volume is reduced.

Description

Double-path integrated optical fiber deflection probe

Technical Field

The utility model belongs to the technical field of optical fiber sensing equipment, and particularly relates to a double-path integrated optical fiber deflection probe.

Background

The optical fiber sensing technology is an important detection technology related to optical fibers, and when the ambient conditions such as ambient pressure, temperature, electric field, magnetic field and the like are changed, the quantity of light transmitted by the optical fibers, such as light intensity, phase, frequency and polarization state, are changed. The optical fiber sensor can be applied to measurement of more than 70 physical quantities such as displacement, vibration, rotation, pressure, bending, strain, speed, acceleration, current, magnetic field, voltage, humidity, temperature, sound field, flow, concentration, PH value and the like, and has very wide application potential and development prospect.

The optical fiber sensor is distinguished according to the detection mode and can be divided into a functional type sensor and a light transmission type sensor, wherein the functional type sensor is manufactured by utilizing a certain sensitive characteristic of the optical fiber, and the light transmission type sensor is provided with a sensitive element between the optical fiber and a detected surface. When the sensor detects the change of the measured physical quantity, the parameter will change, and the parameter is transmitted to the detector through the optical fiber to analyze and obtain some characteristics of the measured object.

The optical fiber probe is used as a basic unit of an optical device and is the basis of the optical fiber sensing probe. The diverging light emitted by the optical fiber is converged by the lens, and then a sensing element is added to form the complete optical fiber sensing probe. The optical fiber sensing probe can be in a single path, a double path or multiple paths, and can meet the requirements according to the characteristics of the measured object.

The traditional optical fiber probe is only used for outputting, all surfaces are plated with anti-reflection films, and the main effect is to output light spots with certain size. The single-path optical fiber probe can be influenced by dust on the surface to be tested or the placement position of the surface to be tested, so that the detection reliability of the optical fiber probe is lower.

Disclosure of Invention

The utility model aims to provide the double-path integrated optical fiber deflection probe, each optical fiber probe is provided with quantitative return light, and the double paths are integrated into a whole, so that the number of detection points is increased, and the detection reliability is improved.

The technical scheme adopted by the utility model is that the double-path integrated optical fiber deflection probe comprises an optical fiber tail fiber A and an optical fiber tail fiber B which are respectively connected with one optical fiber end, wherein the other end parts of the optical fiber tail fiber A and the optical fiber tail fiber B are sequentially attached to and connected with a collimation lens group and a right angle surface of a right angle prism, and the optical fiber tail fiber A is approximately parallel to the optical fiber tail fiber B.

The utility model is also characterized in that:

the transverse separation distance between the optical fiber tail fiber A and the optical fiber tail fiber B is 1.4-1.6 mm.

The optical fiber tail fiber A and the optical fiber tail fiber B are longitudinally separated by a distance of-0.1 to +0.1mm.

The bottom of the right-angle prism is connected with the shell base, and the optical fiber tail fiber A and the optical fiber tail fiber B are connected with the shell base through supporting tubes.

The shell base is connected with the shell, and the two optical fibers penetrate through the shell to connect the optical fiber tail fiber A and the optical fiber tail fiber B.

The shell base is connected with the outer shell through glue bonding or threaded connection or nested connection.

The optical fiber sleeve is sleeved outside the optical fiber.

The beneficial effects of the utility model are as follows:

the double-path integrated optical fiber deflection probe adopts double-path integrated optical fiber probe design, realizes double-point detection, integration and miniaturization of the optical fiber sensing probe, detects the reflection characteristics of two points of a detected object, and improves detection accuracy. The optical fiber sensing probe is provided with one thousandth of monitoring light and is used for comparing with the measured light and referencing. The optical fiber probe adopts the collimating lens group, so that the emergent position and the detection precision of two paths of light are ensured while the whole volume is reduced.

Drawings

FIG. 1 is a schematic diagram of a dual-path integrated fiber-optic deflection probe in accordance with the present utility model;

FIG. 2 is a schematic side view of a dual-path integrated fiber-optic deflection probe in accordance with the present utility model;

FIG. 3 is a schematic illustration of the external shape of a two-way integrated fiber-optic folded probe in accordance with the present utility model.

In the figure, 1, an optical fiber tail fiber A,2, an optical fiber tail fiber B,3, a collimating lens group, 4, a right-angle prism, 5, a shell base, 6, an optical fiber sleeve, 7, a shell cover plate and 8, and a supporting tube.

Detailed Description

The utility model will be described in detail below with reference to the drawings and the detailed description.

The utility model discloses a double-path integrated optical fiber folding probe, which is shown in fig. 1 and 2, and comprises an optical fiber tail fiber A1 and an optical fiber tail fiber B2 which are respectively connected with one optical fiber end, wherein the other end of the optical fiber tail fiber A1 and the other end of the optical fiber tail fiber B2 are sequentially attached and connected with a collimation lens group 3 and a right angle surface of a right angle prism 4, the optical fiber tail fiber A1 is parallel to the optical fiber tail fiber B2, the optical fiber tail fiber A1 and the collimation lens group 3 form a number 1 collimator, the optical fiber tail fiber B2 and the collimation lens group 3 form a number 2 collimator, and outgoing lights of the number 1 collimator and the number 2 collimator are parallel to each other, are separated by a certain distance, are outgoing along respective optical axes, are folded by the right angle prism, and the lights are outgoing in a 90-degree folding way.

The right-angle prism 4 is a right-angle triangle with a certain thickness, and the two collimators share the same right-angle prism 4.

The light emitted from the optical fiber pigtail A1 and the optical fiber pigtail B2 is changed into two parallel light beams by the collimating lens group 3, and the parallel light beams are emitted by 90-degree turn through the right-angle prism 4. The two adjacent parallel light phases are converged for a fixed distance and are consistent in height.

The double-path integrated optical fiber deflection probe consists of two paths of deflection probes, wherein the two paths of deflection probes share a right-angle prism 4, and the collimating lens groups 3 are combined together and processed together, so that the size of a device is minimum, and the precision is higher. In the debugging process, the right-angle prism 4 and the collimating lens group 3 are pre-bonded according to certain requirements, the key and the difficult points are debugging, the optical fiber tail fiber A1 and the optical fiber tail fiber B2 are respectively debugged, and the reference indexes are light spots, return loss, working distance and the like. The two single-path detection lights and the return lights with thousandths can calibrate and reference the respective detection lights. And the reflectivity of two points is collected once for the same measured surface by double-path detection, and the two values can be mutually referred to prevent data from being mistaken. Under the double detection, the accuracy of the whole data is improved by utilizing the self reference light and the contrast light between the two paths.

The right-angle prism 4 can turn the light path by 90 degrees, wherein the inclined plane adopts the principle of total reflection, and the other two surfaces are plated with antireflection films.

The transverse separation distance between the optical fiber tail fiber A1 and the optical fiber tail fiber B2 is 1.4-1.6 mm, and the optical fiber tail fibers are closely adjacent, so that the whole volume of the double-path integrated optical fiber bending probe can be miniaturized.

The optical fiber tail fiber A1 and the optical fiber tail fiber B2 are longitudinally separated by a distance of-0.1 mm to +0.1mm, and data come from debugging precision.

Each probe is provided with one thousandth of return light, the return light is reflected by the medium on the surface of the outermost side of the right-angle prism 4, the measured object is placed in front of the double probes, the reflectivity of the measured object is measured in a double-path parallel mode at equal height, the reflected light can be overlapped with the return light of the probe, the value can be detected through a return loss instrument, and judgment and analysis can be carried out.

As shown in fig. 3, the bottom of the right-angle prism 4 is connected with the housing base 5, the optical fiber pigtail A1 and the optical fiber pigtail B2 are connected with the housing base 5 through the supporting tube 8, the housing base 5 plays a role in fixing and placing the No. 1 collimator, the No. 2 collimator and the right-angle prism 4, and the tail space of the housing base 5 enables the optical fiber to exit normally.

The supporting tube 8 is made of glass, and mainly has a fixing effect on two tail fibers, so that the firmness of bonding of ultraviolet curing glue is improved.

The shell base 5 is connected with the shell 7, and two optical fibers penetrate through the shell 7 to connect the optical fiber tail fiber A1 and the optical fiber tail fiber B2. The outer shell 7 mainly serves to protect the internal components, ensuring the integrity of the device.

The shell base 5 and the outer shell 7 are connected through glue bonding or threaded connection or nested connection.

The optical fiber sheath 6 is sleeved outside the optical fiber, the optical fiber sheath 6 can protect the optical fiber, and the damage to the optical fiber caused by collision, friction and other factors of the structures such as the outer shell 2 is prevented.

When the double-path integrated optical fiber folding probe is used, the light-emitting surface of the right-angle prism 4 of the folding probe is aligned with the measured surface, the double-path optical fibers are respectively connected with a return loss instrument or a coupler, and the instrument displays the return loss value of the probe. When the measured object or the measured surface approaches, the reflected light of the measured surface sequentially passes through the right-angle prism 4, the lens group 3, the optical fiber tail fiber A1 and the optical fiber tail fiber B2 to enter a return loss instrument or a coupler, and the return loss value is obtained through superposition. The quantity of the reflected light from the measured surface can be known through the change of the return loss value, and meanwhile, the two return loss values can be compared to comprehensively judge one condition of the reflected light.

Claims

1. The double-path integrated optical fiber deflection probe is characterized by comprising an optical fiber tail fiber A (1) and an optical fiber tail fiber B (2) which are respectively connected with one optical fiber end part, wherein the other end parts of the optical fiber tail fiber A (1) and the optical fiber tail fiber B (2) are sequentially attached to and connected with right-angle surfaces of a collimating lens group (3) and a right-angle prism (4), and the optical fiber tail fiber A (1) is approximately parallel to the optical fiber tail fiber B (2).

2. The dual-path integrated optical fiber deflection probe according to claim 1, wherein the optical fiber pigtail a (1) and the optical fiber pigtail B (2) are laterally separated by a distance of 1.4-1.6 mm.

3. The dual-path integrated optical fiber deflection probe according to claim 1, wherein the optical fiber pigtail a (1) and the optical fiber pigtail B (2) are longitudinally separated by a distance of-0.1 to +0.1mm.

4. The double-path integrated optical fiber folding probe according to claim 1, wherein the bottom of the right-angle prism (4) is connected with the housing base (5), and the optical fiber pigtail A (1) and the optical fiber pigtail B (2) are connected with the housing base (5) through supporting pipes (8).

5. The double-path integrated optical fiber folding probe according to claim 4, wherein the housing base (5) is connected with an outer housing (7), and two optical fibers penetrate through the outer housing (7) to connect the optical fiber pigtail a (1) with the optical fiber pigtail B (2).

6. The two-way integrated fiber-optic folded probe according to claim 4, wherein the housing base (5) is glued or screwed or nested with the outer housing (7).

7. The two-way integrated fiber-optic folded probe according to claim 1, further comprising a fiber optic ferrule (6), the fiber optic ferrule (6) being sleeved outside the optical fiber.