CN201203582Y - An optical fiber end face detector - Google Patents

Abstract

The utility model provides an optical fiber end face detector, which includes a fixture, an adapter and an objective lens group; also includes a knob; wherein, the adapter for clamping the optical fiber head is located in the fixture, and the optical axis of the objective lens group and the adapter The central through hole is placed along the x direction of the three-dimensional space, and the knobs are respectively installed on the clamp according to the x, y, and z directions of the three-dimensional space, so as to adjust the clamps in the x, y, and z directions respectively. displacement in one direction. The utility model can detect various optical fiber heads, and can clean the end face of the optical fiber in real time, has the advantages of good cleaning effect and high efficiency, and is convenient to carry.

Description

An optical fiber end face detector

technical field

The utility model relates to the field of optical detection instruments, in particular to an optical fiber end face detector which can clean a single optical fiber or a bundled optical fiber with a large end face in real time.

Background technique

At present, due to its excellent light-guiding performance, optical fibers are increasingly widely used in the fields of communication, display, medical treatment, and households. Especially in the field of laser display, there are many applications of using optical fibers to transmit laser light, but dirt, dust and Other pollutants will have a huge adverse effect on the transmission of laser light in the optical fiber. According to statistics, more than 85% of optical fiber failures are caused by dust on the end face of the optical fiber or its own damage. When the pollution is serious, it may even cause the optical fiber to accumulate heat and be burned. Therefore, it is necessary to monitor the cleanliness of the fiber end face and clean the fiber end face in time to reduce the probability of the above failures.

For the test of optical fiber end face, the optical fiber end face tester is a necessary field equipment. The operation mode of the currently commercially available optical fiber end-face detector is similar to that of a desktop microscope, that is, light sources such as bulbs or LEDs are used for illumination, and the fiber end face is imaged to the human eye through the objective lens group and eyepiece lens. The stage is changed to a fiber adapter for holding the fiber tip. When using this traditional optical fiber end-face inspection instrument, the optical fiber connector to be inspected is inserted into the adapter, and the operator directly observes the eyepiece to view the image of the optical fiber end-face, and adjusts the object distance to make the image of the optical fiber end-face clear. The disadvantages of this detection device are:

1. The interior of the detection device needs to use light bulbs for field of view lighting. The power supply part used to provide electric energy for the light bulbs is not easy to miniaturize, resulting in a bulky overall structure of the device, which is not easy to carry and use on site;

2. When the detection device is cleaning the optical fiber, the optical fiber must be taken out from the adapter and wiped, then put back into the detection device and the object distance is adjusted again for observation. The end face of the optical fiber cannot be cleaned in real time according to the observation results. This cumbersome reciprocating operation makes the efficiency low, and without the assistance of real-time observation, the cleaning effect is often not good;

3. With the development of optical fiber applications, it is necessary to observe the bundled optical fiber with large end face as shown in Figure 2 in many occasions. Since the existing device cannot adjust the position of the optical fiber end face of the inspected optical fiber head, it can only be observed as shown in Figure 1. The end face of a single fiber is shown, so the device can no longer meet the needs of the application at this stage.

Patent No. ZL200620149898.X's utility model patent "An Optical Fiber Endface Detector" uses a battery-driven LED as a lighting source, which solves the problem that the above-mentioned device cannot be portable when observing a single optical fiber, but it still cannot inspect the endfaces of large-end bundled optical fibers. Detection and real-time cleaning.

Contents of the invention

One purpose of the utility model is to overcome the defect that the existing optical fiber end-face detector cannot observe bundled optical fibers with large end faces, and provide a detector capable of detecting optical fibers with various end-face sizes.

Another purpose of the utility model is to overcome the cumbersome operation of the existing optical fiber end face detector in the process of cleaning the optical fiber, and provide a fiber detector that can quickly and easily clean the optical fiber.

Another purpose of the utility model is to overcome the defects that the existing optical fiber end-face detector is too bulky and not easy to carry, so as to provide a light and easy-to-carry optical fiber end-face detector.

In order to achieve the above purpose, the utility model provides an optical fiber end face detector, including a fixture, an adapter and an objective lens group; also includes a knob; wherein,

The adapter for clamping the optical fiber head is located in the fixture, the optical axis of the objective lens group and the central through hole of the adapter are placed along the x direction of the three-dimensional space, and the knob is in the The clamps are respectively installed in the x, y, and z directions of the three-dimensional space, so as to adjust the displacement of the clamps in the three directions of x, y, and z respectively.

In the above technical solution, the fiber head is a single fiber head or a bundled fiber head with a large end face.

The above technical solution also includes a reel assembly, and the reel assembly is placed in any position in the optical fiber end face inspection instrument that does not block the imaging of the optical fiber head.

In the above technical solution, the reel assembly includes a reel, a reel shaft and a mechanical transmission part; the reel and the reel shaft are driven by the mechanical transmission part to move between the installation position and the working position. Move; the installation position is any position in the optical fiber end face detector that does not block the imaging of the fiber head, and the working position is the position where the fiber end face of the fiber head is in contact with the tape.

In above-mentioned technical scheme, also comprise high-sensitivity CCD, monitor and power supply; Wherein, described high-sensitivity CCD and the optical axis of described objective lens group and the optical fiber head to be detected are placed along the x direction of three-dimensional space, and described monitor The device receives an electrical signal from the high-sensitivity CCD and displays an image of the fiber end face of the fiber head.

In the above technical solution, the illuminance index of the high-sensitivity CCD is less than or equal to 0.01 lux.

In the above technical solution, the power supply is powered by civilian alternating current or battery or powered by USB interface.

The utility model has the advantages of:

1. The utility model adopts three-direction knobs in the optical fiber end face detector, so that the position of the detected optical fiber can be adjusted, thereby realizing the detection of various optical fibers including large end face bundled optical fibers.

2. The utility model adopts a tape assembly in the optical fiber end face detector, so that the end face of the optical fiber can be cleaned in real time without changing the position of the optical fiber, and the cleaning effect is good and the efficiency is high.

3. The utility model can adopt a high-sensitivity CCD in the optical fiber end face detector, so that the lighting source, the beam splitter and other parts can be omitted, which is conducive to reducing the size of the instrument and making it easy to carry.

Description of drawings

Below, describe embodiment of the present utility model in detail in conjunction with accompanying drawing, wherein:

Figure 1 is a schematic diagram of a single fiber end face;

Fig. 2 is a schematic diagram of a large-end bundled optical fiber with multiple optical fiber end-faces;

Fig. 3 is a structural diagram of an optical fiber end face detector of the present invention in an embodiment;

Fig. 4 is a structural diagram of another embodiment of the optical fiber end face detector of the present invention;

5 is a structural diagram of another embodiment of the optical fiber end face detector of the present invention;

FIG. 6 is a schematic diagram of the tape-reeling assembly in the optical fiber end face detector of the present invention.

Illustration

301 Fiber Optic Head 302 Fixture 303 Adapter

304 Knob 305 Objective lens group 401 Tape assembly

501 Fiber end face 502 Tape 503 Tape shaft

504 Mechanical Transmission Parts 601 High Sensitivity CCD 602 Monitor

603 power supply

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

An embodiment of an optical fiber end-face inspection instrument is illustrated in FIG. 3 . In this embodiment, the optical fiber end-face inspection instrument includes a clamp 302 , an adapter 303 , a knob 304 and an objective lens group 305 . Wherein the adapter 303 is located in the clamp 302, the optical axis of the objective lens group 305 and the center through hole of the adapter 303 are placed along the x direction, and a knob 304 is respectively arranged on the x, y, and z directions on the clamp 302, these three knobs 304 The displacement of the fixture 302 in three directions x, y, and z can be adjusted respectively. Compared with the traditional optical fiber end face detector which cannot adjust the position of the optical fiber end face, the utility model introduces the knob 304, which can adjust the position of the bundled optical fiber with the large end face in the three directions of x, y, and z, thereby realizing the adjustment of the bundled optical fiber. Observe the end face of each fiber. When using the fiber end face detector in this embodiment to detect the fiber end face, the fiber head 301 to be tested is placed in the adapter 303, and the fiber head 301 can be either a single fiber head or a large-end bundled fiber head. Generally speaking, since the optical axis of the objective lens group 305 and the central through hole of the adapter 303 have been placed along the x direction, when observing a single optical fiber, fine-tuning the knob 304 in the three directions of x, y, and z can make its end face Clearly appear in the field of view; when observing the bundled optical fiber with large end faces, the fiber head 301 can be adjusted through the knobs 304 in the y and z directions so that one or several end faces of the fibers you want to observe appear within the field of view. The knob 304 in the z direction adjusts the object distance of the fiber head 301 in the z direction so that the end faces of one or several fibers to be observed are clearly imaged, and the user can directly observe the cleanliness of the end faces of the fiber head 301 through the objective lens group 305 .

In another embodiment of the present utility model, the optical fiber end face detector of the present utility model also includes a reel assembly 401, as shown in Figure 4, in this embodiment, the installation position of the reel assembly 401 is in the 302 and the objective lens group 305 and close to the clamp 302, and is located directly below the z-axis of the fiber head 301 and does not block the imaging of the fiber end face. Those of ordinary skill in the art should understand that due to the compression of the system volume or other reasons, the coil The installation position of the ribbon assembly 401 may be any position in the fiber optic inspection instrument that does not block the imaging of the fiber head 301, and is not limited to the above positions. When the end face of the fiber optic head 301 needs to be cleaned, the fiber optic head 301 can be cleaned directly through the reel assembly 401 without moving the position of the fiber optic head 301 . In FIG. 5 , the composition and working principle of the tape winding assembly 401 are further described. The reel assembly 401 is composed of a reel 502, a reel shaft 503 and a mechanical transmission part 504. The mechanical transmission part 504 is used to make the reel 502 located directly below the z-axis of the optical fiber end face 501 move from the dotted line position in FIG. assembly 401) along the arrows a and b to adjust (by flipping or sliding or any other mechanical movement) to the same height as the fiber end face 501, and make the reel 502 contact with the fiber end face 501 (that is, the reel assembly 401), at this time, it can be seen from the objective lens group 305 that the tape 502 covers the end face 501 of the optical fiber. Then rotate the reel shaft 503 according to the direction of arrow c in FIG. The next piece of clean tape. After wiping, adjust the cleaning tape 502 by the mechanical transmission part 504 to the position directly below the z-axis of the optical fiber end face 501 in the opposite direction of arrow a and arrow b. Change, observation can be made without adjusting the knob 304. After the entire tape is used, the tape assembly 401 can be disassembled and replaced with a new clean tape. The mechanical transmission part 504 in this embodiment can be implemented using existing technologies, for example, related devices similar to those in a tape recorder that make the magnetic tape and the magnetic head contact and separate can be used. In this embodiment, through the use of the reel assembly 401, the real-time cleaning of the fiber end face can be realized, which can greatly improve the cleaning efficiency of the fiber end face compared with traditional fiber end face detectors that have to take out the fiber from the adapter and wipe it. .

In yet another embodiment of the present invention, on the basis of the aforementioned embodiment including the reel assembly 401, the optical fiber end face detector further includes a high-sensitivity CCD 601, a monitor 602 and a power supply 603. As shown in Figure 6, the high-sensitivity CCD 601 wherein is placed coaxially with the objective lens group 305 and the optical fiber head 301 to be detected along the x direction, and the monitor 602 is connected with the circuit of the high-sensitivity CCD 601. Similar to the operation in the foregoing embodiments, after adjusting the displacement of the fiber head 301 by using the knob 304, ambient light is irradiated on the fiber end face of the fiber head 301 and then reflected, and the image formed by the reflected light through the objective lens group 305 is determined by a high-sensitivity Received by the CCD 601, the electric signal generated by the high-sensitivity CCD 601 is sent to the monitor 602, so that the image of the fiber end face is displayed on the monitor 602. The illuminance index of the high-sensitivity CCD 601 should generally not be higher than 0.01 lux, and the monitor 602 can be a liquid crystal display or other forms of display. In this embodiment, since the high-sensitivity CCD601 is used to collect the imaging of the fiber end face, the weak ambient light can make the high-sensitivity CCD601 image clearly, so there is no need to set up an additional lighting source and corresponding Devices such as spectrometers save the space of the entire detector. In this embodiment, the power supply is powered by civilian alternating current. In addition, if the power supply 603 is designed as a battery or powered by a USB interface and the volume of the instrument is further compacted, the entire detector can be made into a portable detector.

When the optical fiber end face detector in this embodiment is used to detect the end face of the optical fiber, the operator fixes the optical fiber head 301 on the adapter 303, and adjusts the knob 304 in the three directions of x, y, and z to adjust the object distance of the end face of the optical fiber to make the image It is clearly displayed on the monitor 602, and the contamination of the fiber end face can be judged by observing the image of the monitor 602. When it is necessary to clean the end face of the optical fiber, it can be realized by using the winding tape assembly 401 included in the tester. The specific cleaning process is similar to that of the previous embodiment, and will not be repeated here. It should be noted that, although this embodiment is an improvement made on the basis of the aforementioned embodiment including the reel assembly, those of ordinary skill in the art should understand that combining the improvements made in this embodiment with the aforementioned The embodiment that does not include the reel assembly also belongs to the content to be protected by the optical fiber end face detector of the present invention.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limit them. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present utility model does not depart from the spirit and scope of the technical solution of the present utility model, and all of them should cover In the scope of the claims of the present utility model.

Claims (7)

1. An optical fiber end face detector comprises a clamp (302), an adapter (303) and an objective lens group (305); characterized in that the device also comprises a knob (304); wherein,

the adapter (303) for clamping the fiber head is positioned in the clamp (302), the optical axis of the objective lens group (305) and the central through hole of the adapter (303) are arranged along the x direction of the three-dimensional space, and the knobs (304) are respectively arranged on the clamp (302) according to the x, y and z directions of the three-dimensional space so as to respectively adjust the displacement of the clamp (302) in the x, y and z directions.

2. The fiber-optic endface detector of claim 1, wherein the fiber-optic tips are single or large endface bundled fiber-optic tips.

3. The fiber-optic endface monitor of claim 1, further comprising a tape assembly (401), wherein the tape assembly (401) is positioned at any location within the fiber-optic endface monitor that does not obscure the imaging of the fiber-optic tips.

4. The fiber-optic endface monitor of claim 3, wherein said tape assembly (401) includes a tape (502), a tape spool (503), and a mechanical drive member (504); the tape (502) and the tape rotating shaft (503) are driven by the mechanical transmission part (504) to move between an installation position and a working position; the installation position is any position in the optical fiber end face detector which does not shield the imaging of the optical fiber head, and the working position is a position which enables the optical fiber end face of the optical fiber head to be in contact with the winding belt (502).

5. The fiber-optic endface detector of claims 1 or 3, further comprising a high sensitivity CCD (601), a monitor (602), and a power supply (603); the high-sensitivity CCD (601), the optical axis of the objective lens group (305) and the optical fiber head to be detected are coaxially arranged along the x direction of a three-dimensional space, and the monitor (602) receives an electric signal from the high-sensitivity CCD (601) and displays an image of the optical fiber end face of the optical fiber head.

6. The fiber-optic endface detector of claim 5, wherein the illumination index of the high-sensitivity CCD (601) is less than or equal to 0.01 lux.

7. The fiber-optic endface detector of claim 5, wherein the power source (603) is a commercial AC power supply or a battery or USB interface.

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