CN211477582U

CN211477582U - Optical fiber panel numerical aperture measuring device

Info

Publication number: CN211477582U
Application number: CN202020121394.7U
Authority: CN
Inventors: 陈子天; 陈宣杨; 李璐康; 段海峰; 李文涛
Original assignee: Sina Biotechnology Beijing Co ltd
Current assignee: Sina Biotechnology Beijing Co ltd
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-09-11
Anticipated expiration: 2030-01-20

Abstract

The utility model provides a device for measuring the numerical aperture of an optical fiber panel, which is characterized by comprising a laser light source, an electric rotating platform, an optical power meter and an optical fiber panel to be detected; wherein the surface of the optical fiber panel and the emitting light direction of the laser light source form an included angle of 0-90 degrees; the optical fiber panel and the probe of the optical power meter are arranged on the electric rotating platform; the optical fiber panel is fixed on a probe of the optical power meter; an optical attenuation sheet is further arranged between the laser light source and the optical fiber panel. The device has simple structure and accurate measurement.

Description

Optical fiber panel numerical aperture measuring device

Technical Field

The utility model relates to a measuring device of optical fiber panel (FOP) numerical aperture belongs to optics, detection area. More specifically speaking, the utility model relates to a device is used for quick low-cost high accuracy measurement of fiber optic faceplate numerical aperture.

Background

The FOP is a fiber panel, and has the characteristics of high light transmission efficiency, small interstage coupling loss, clear and real image transmission, zero thickness in optics and the like. The optical fiber panel is widely applied to the fields of optical energy and image transmission, such as optical detection, machine vision and other industries, medical treatment and scientific research. The most typical application of the optical fiber panel is as an optical input and output window of a low-light-level image intensifier, and the optical fiber panel plays an important role in improving the quality of an imaging device. The NA (numerical aperture) of the fiber optic faceplate is one of its most important parameters. The traditional method for measuring the NA of the optical fiber panel by adopting an incoherent light source as an illumination light source is complex in structure and large in measurement result error. The utility model provides a simple quick fiber surface board's NA measuring device utilizes the laser of laser instrument transmission, hits fiber surface board's surface, and fiber surface board can detect the light intensity change of different angles on electric rotary table.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for measuring the numerical aperture of an optical fiber panel, which is characterized by comprising,

the device comprises a laser light source, an electric rotating platform, an optical power meter and an optical fiber panel to be detected; wherein the surface of the optical fiber panel and the emitting light direction of the laser light source form an included angle of 0-90 degrees; the optical fiber panel and the probe of the optical power meter are arranged on the electric rotating platform; the optical fiber panel is fixed on a probe of the optical power meter; an optical attenuation sheet is further arranged between the laser light source and the optical fiber panel.

According to a preferred embodiment, the relative position of the optical power meter and the optical fiber panel is fixed while the motorized rotary table is rotated.

According to a preferred embodiment, the electric translation stage is provided with a fixed fixture for fixing a probe of the optical power meter; the optical fiber panel is attached to a probe of the optical power meter in an adhering mode.

According to a preferred embodiment, the fiber optic faceplate surface is parallel to the surface of the motorized rotary stage.

According to a preferred embodiment, the fiber optic faceplate has a monofilament diameter of 1-10 microns.

According to a preferred embodiment, the laser light source is a blue laser light source.

According to a preferred embodiment, the beam diameter of the laser light source is less than 3 mm.

According to a preferred embodiment, a motorized translation stage control system is also included.

According to a preferred embodiment, the device further comprises a driver for driving the electric translation stage to move, so that the optical fiber panel and the emitting direction of the laser light source form an included angle of 0-90 degrees.

The numerical aperture of the optical fiber panel is measured by measuring the acceptance angle of the optical fiber panel. A laser beam with a diameter not exceeding 3mm is used as a light source. Due to the good directivity of the laser, the angle of incidence on the fiber optic faceplate can be precisely controlled. The sample is placed on an electric rotating table, and the angle between the sample and the laser beam is controlled by software. An optical power meter was placed behind the fiber optic faceplate sample to measure the light intensity passing through the fiber optic faceplate. And finally, normalizing the obtained data of the relative angle of the light intensity to obtain the numerical aperture of the optical fiber panel. Equipment, measure simpler to not only can measure the numerical aperture of single optic fibre, can also measure the numerical aperture of the optic fibre panel that many optic fibres arranged the formation.

Drawings

FIG. 1 is a schematic view of a measuring apparatus.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

FOP is the abbreviation for fiber optical plates (fiber optic face plates or fiber optic face plates). Is a common optical component. A fiber optic faceplate may be considered to be an aggregate of a plurality of optical fibers. The direction of the optical fibers is perpendicular to the surface of the fiber optic faceplate. The optical fiber panel has the characteristics of high light transmission efficiency, small interstage coupling loss, clear and real image transmission, zero thickness in optics and the like. The most typical application is as the optical input and output window of a low-light level image intensifier, which plays an important role in improving the quality of an imaging device. The device is widely applied to various cathode ray tubes, camera tubes, CCD coupling and other instruments and equipment needing to transmit images. Each optical fiber of the fiber optic faceplate may be referred to as a monofilament. The monofilament is composed of a skin layer and a core layer. Monofilaments are generally round and can range in size from 1 micron to several hundred microns and even larger. When the size is small, there is a certain error in measuring the diameter of the optical fiber by using the conventional method. Conventional techniques can ensure a certain accuracy when measuring a generally relatively thick optical fiber. However, there is no good way to measure the structure of the optical fiber panel in which the integrated optical fibers are closely arranged.

the device comprises a laser light source, an electric rotating platform and an optical power meter; wherein the light emitted by the laser light source is irradiated on the surface of the optical fiber panel; the optical fiber panel and the optical power meter are placed on the electric rotating platform; the light emitted by the laser source is collected by the optical power meter at the rear side after passing through the optical fiber panel.

The monofilament diameter of the optical fiber panel of the utility model is 1-10 microns.

According to a preferred technical scheme, the laser is blue laser, green laser or red laser.

Example 1

The optical fiber panel is formed by cutting and polishing a bundle of drawn optical fiber bundles. The fiber core of each optical fiber can guide light into a skin layer without guiding light, and the numerical aperture model of the optical fiber is similar to that of a single optical fiber. Since the fiber optic faceplate is composed of many fiber bundles, it can control only the angle of the incident beam without controlling the position of the incident beam when measuring its NA, so the laser is an ideal light source in this application.

Fig. 1 is a schematic view of the testing device of the present invention. Wherein, 1 is the laser, 2 is the decay piece, 3 is the optic fibre panel, 4 is the optical power meter, 5 is electronic revolving stage.

A beam of laser emitted by the laser directly strikes the optical fiber panel to be tested through the attenuation sheet. The optical fiber panel to be tested and the optical power meter are placed on the electric rotating platform, and the optical power meter is placed behind the optical fiber panel to test the emergent optical power. The fiber optic panel and the optical power meter remain relatively stationary during the testing process. The rotary table is rotated at equal intervals, and the optical power values at corresponding angles are recorded. After the laser hits the optical fiber panel, the light intensity is obviously weakened and can be detected by a following optical power meter.

In the use process, the emission angle of the laser is firstly adjusted. So that the laser light is irradiated on the upper surface of the optical fiber panel.

Since, by different definition, one uses 50% of the maximum value as the value theta and one uses 90% of the maximum value as the value theta, only the measurement results are given here and no specific value of NA is given. According to the experiment, when the optical fiber panel of Guangzhou Hongshan Sancheng optoelectronic preparation of 3 micrometers was used, the angle was 26 degrees when 90% of the maximum value was used.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The device for measuring the numerical aperture of the optical fiber panel is characterized by comprising a laser light source, an electric rotating table, an optical power meter and the optical fiber panel to be detected; wherein the surface of the optical fiber panel and the emitting light direction of the laser light source form an included angle of 0-90 degrees; the optical fiber panel and the probe of the optical power meter are arranged on the electric rotating platform; the optical fiber panel is fixed on a probe of the optical power meter; an optical attenuation sheet is further arranged between the laser light source and the optical fiber panel.

2. The apparatus of claim 1, wherein the motorized rotary stage is configured such that the relative positions of the optical power meter and the fiber optic faceplate are fixed while the motorized rotary stage is rotating.

3. The apparatus of claim 2, wherein the motorized translation stage has a fixture thereon for holding a probe of the optical power meter; the optical fiber panel is attached to a probe of the optical power meter in an adhering mode.

4. The apparatus of claim 1, wherein the fiber optic faceplate surface is parallel to a surface of the motorized rotary stage.

5. The device of claim 1, wherein the fiber optic faceplate has a monofilament diameter of 1-10 microns.

6. The apparatus of claim 1, wherein the laser light source is a blue laser light source.

7. The apparatus of claim 6, wherein the beam diameter of the laser light source is less than 3 mm.

8. The apparatus of claim 1, further comprising a motorized translation stage control system.

9. The apparatus of claim 8, further comprising a driver for driving the motorized translation stage to move such that the fiber optic faceplate and the direction of light emitted by the laser source form an angle of 0-90 degrees.