CN118033823A

CN118033823A - Multi-path optical signal single-fiber transmission adapter

Info

Publication number: CN118033823A
Application number: CN202410432519.0A
Authority: CN
Inventors: 刘勇; 陈一博; 林尚亚; 张丽丹; 李伟
Original assignee: Jiangsu Gulf Semiconductor Technology Co ltd
Current assignee: Jiangsu Gulf Semiconductor Technology Co ltd
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2024-05-14
Anticipated expiration: 2044-04-11
Also published as: CN118033823B

Abstract

The invention discloses a multipath optical signal single-fiber transmission adapter. Belongs to the technical field of optical fiber signal injection devices. The burn of the end face of the optical fiber input end can be reduced. The collimating optical input round table, the first convex lens, the second convex lens, the third convex lens and the outgoing optical fiber are sequentially arranged at intervals from left to right, and the central line of the collimating optical input round table, the left focus and the right focus of the first convex lens, the left focus and the right focus of the second convex lens, the left focus and the right focus of the third convex lens and the axial lead of the outgoing optical fiber all fall on the same horizontal straight line L; the right focus of the first convex lens is overlapped with the left focus of the second convex lens; the right focus of the third convex lens is located on the axis of the lead-out optical fiber.

Description

Multi-path optical signal single-fiber transmission adapter

Technical Field

The invention relates to the technical field of optical fiber signal injection devices, in particular to a multipath optical signal single-fiber transmission adapter.

Background

When an optical signal is input to an optical fiber, return light is generated at the input end of the optical fiber. The return light can adversely affect the optical transceiver and the transmitted optical signal. For example, when the return light reaches the optical transmitter, the laser nonlinear chirp, the relative intensity noise change, the lasing drift and other adverse effects can be caused when the return light is severe. When return light reaches the optical receiver via interface multiple reflections or other mechanisms, it can cause degradation of the receiver signal-to-noise ratio, reducing the receiver sensitivity. When the return light generates multiple reflection oscillation at a certain interface in the link, especially when the signal light is coherent light, a coherent phenomenon can be generated, and normal signal transmission is seriously affected.

At present, an input end of an optical fiber is made into an inclined plane, and parallel light is injected into the optical fiber, but when four lines of an incident light ray, a normal line, a refractive light ray and an axial lead of the light ray of a certain optical signal are not in the same plane, a transmission light path of the optical signal in the optical fiber is bent. Resulting in a long transmission path of the strip optical signal in the optical fiber, and the longer the transmission path is, the greater the loss of the optical signal is, and the more easily the optical signal is distorted.

When optical signals are transmitted in the optical fiber, the optical signals are mainly transmitted through multiple total reflections of signal light rays in the optical fiber. Each total reflection of light in the fiber forms a reflected path. However, since the optical fibers are not all arranged in a straight line during use, the optical fibers are bent at many points and twisted at many points during use. Particularly, at the optical fiber torsion, a plurality of light rays can generate a tortuous transmission light path, so that each section of reflection light path of the light rays at the optical fiber torsion is not easy to intersect with the optical fiber axial lead. A certain section of reflection light path in the optical fiber is not intersected with the axial lead of the optical fiber, so that the transmission path length of the section of reflection light path in the optical fiber is shortened, and the reflection times of light in the optical fiber are affected. The loss of light in the fiber is mainly caused at reflection points in the fiber, each of which forms a reflection path. So the more the number of reflections, the greater the loss of light; the fewer the number of reflections, the less the loss of light.

At present, when a plurality of signal lights are irradiated to the input end of the same optical fiber, the collimating lens is generally adopted to directly irradiate the plurality of signal lights which are parallel to each other to the input end of the optical fiber, and the plurality of signal lights which are parallel to each other are not in a plane, so that the incident lights of some optical signals and the axial lead of the optical fiber cannot fall in the same plane. When the incident light of a certain optical signal and the axial lead of the optical fiber cannot fall in the same plane, the optical path of the signal light when the signal light propagates in the optical fiber cannot intersect with the axial lead of the optical fiber. The diameter of the optical fiber passes through the axial lead of the optical fiber, and the same signal light is transmitted in a plurality of sections of reflection light paths in the optical fiber, and the length of each section of reflection light path is longest only when the reflection light path is intersected with the axial lead of the optical fiber.

Chinese patent application No.: CN2017202783679, patent entitled "a new type of waterproof optical fiber connector", discloses: the waterproof optical fiber connector comprises an optical fiber input end, a connecting rod, an optical fiber cold connector, a spiral connector, an output connecting wire and an optical fiber output end, wherein the left side of the connecting rod is connected with a rear cover, and the waterproof optical fiber connector performs waterproof work on the optical fiber connector through the covers in the horizontal direction and the vertical direction, so that rainwater is prevented from entering the connector, and internal parts of the connector are prevented from being damaged. The waterproof optical fiber connector only plays a waterproof role.

Disclosure of Invention

The invention aims to solve the defects of the prior optical fiber connector and provides a multipath optical signal single-fiber transmission adapter. By enabling each signal ray to rotate around the same straight line, the time of the same light incident point on the component to be irradiated by light is shortened, and all components at the input end of the optical fiber are not easy to burn by light. Each light can swing longitudinally around the horizontal straight line L, so that the incidence point of the light on the light inlet surface of each lens and the incidence point on the end face of the input end of the optical fiber also swing longitudinally around the horizontal straight line L, any light beam can not always irradiate on the same point on the light inlet surface of each lens and the same point on the end face of the input end of the optical fiber, and therefore the light inlet surface of each lens and the end face of the input end of the optical fiber are not easy to burn by the light.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The utility model provides a multichannel optical signal single-fiber transmission adapter, includes from left to right the collimation light input round platform, first convex lens, no. two convex lenses, no. three convex lenses and the optic fibre of drawing forth of interval arrangement in proper order to the central line of collimation light input round platform, the left focus and the right focus of first convex lens, the left focus and the right focus of No. two convex lenses, the left focus and the right focus of No. three convex lenses, and the axial lead of drawing forth optic fibre all fall on same horizontal straight line L. The collimating light input round table is provided with a plurality of fiber inserting holes capable of radiating light rays to the first convex lens horizontally and rightwards, and each light ray radiating to the first convex lens from each fiber inserting hole is parallel to a horizontal straight line L. The right focus of the first convex lens is overlapped with the left focus of the second convex lens. The right focus of the third convex lens is located on the axis of the lead-out optical fiber. The left end face of the outgoing optical fiber is a vertical plane, and the vertical plane of the left end of the outgoing optical fiber is perpendicular to the horizontal straight line L. Any light beam emitted from each fiber inserting hole horizontally to the right sequentially passes through the first convex lens, the second convex lens and the third convex lens and irradiates on the vertical plane at the left end of the lead-out optical fiber. And the included angle between any light ray irradiated from the third convex lens to the vertical plane at the left end of the lead-out optical fiber and the horizontal straight line L is smaller than a set angle. After any light irradiated on the vertical plane of the left end of the extraction optical fiber is refracted in the extraction optical fiber, the refracted light is continuously transmitted rightward in the extraction optical fiber.

The left end of a shading shell tube is hermetically and rotatably connected to the outer edge of the right end of the collimating light input round table, and the right end of the shading shell tube is hermetically connected to the left side end of the outgoing optical fiber, so that the right end face of the collimating light input round table, the first convex lens, the second convex lens, the third convex lens and the left side end of the outgoing optical fiber are hermetically and light-tightly arranged in the shading shell tube. The right side end of the collimation light input round table is fixedly sleeved with a driven gear ring, and the outer ring of the driven ring is provided with a driven gear. The outer tube wall of the shading shell tube is fixedly provided with a motor I, a driving gear is arranged on a rotating shaft of the motor I, and the driving gear is meshed with the driven gear.

The rotation of the rotating shaft of the motor I drives the driven gear ring to rotate, and the rotation of the driven gear ring drives the collimating light input round table to rotate.

After any one light ray irradiated on the vertical plane of the left end of the extraction optical fiber is reflected on the vertical plane of the left end of the extraction optical fiber, the intersection point A of the reflected light ray or the extension line of the reflected light ray on the vertical plane of the left end of the extraction optical fiber and the horizontal straight line L is positioned on the horizontal straight line L between the extraction optical fiber and the third convex lens.

The first convex lens and the second convex lens are matched for use, and the effect is mainly that a plurality of light rays which are horizontally irradiated towards the right and have larger mutual distance are output on the collimated light input round table light, the distance between the light rays is reduced, and the included angle between the refracted light rays which are converged on the right of the third convex lens and the horizontal straight line L is smaller. The third convex lens has a longer focal length, and the longer focal length can enable the included angle between each light ray and the horizontal straight line L to be smaller. The reflection quantity of the light after reflection can be reduced, the intensity of the refracted light after the light is refracted can be increased, and stronger optical signals can be emitted into the extraction optical fiber.

When the signal light is transmitted in the optical fiber, each section of reflection light path of each signal light can intersect with the axial lead of the optical fiber as much as possible, so that the transmission path of the signal light in the optical fiber is short, the number of reflection points of the signal light in the optical fiber transmission is small, and the optical signal loss is small.

The scheme can lead the end face of the input end of the optical fiber to be difficult to burn by light, can also reduce the burn of the first convex lens, the second convex lens and the third convex lens, and has long service life and good reliability.

Preferably, the first motor is a stepper motor. The rotating shaft of the motor I uniformly rotates. When the rotating shaft of the motor I rotates, the rotating shaft firstly rotates clockwise by a Z-degree angle and then stops rotating for X minutes, and then rotates clockwise by the Z-degree angle and then stops rotating for X minutes. And then stopping rotating for X minutes after rotating for Z degrees clockwise. Then stopping rotating for X minutes after rotating Z degrees anticlockwise, and stopping rotating for X minutes after rotating Z degrees anticlockwise. Then stopping rotating for X minutes after rotating for Z degrees clockwise, and stopping rotating for X minutes after rotating for Z degrees clockwise. Then the rotation is stopped for X minutes after rotating clockwise for Z degrees. The rotating shaft of the motor I circularly rotates in a reciprocating way. And X is less than 60. Z is less than 10.X refers to time and Z refers to the angle of rotation. According to the scheme, each light ray can rotate back and forth around the horizontal straight line L, so that the incident point of the light on the light inlet face of each lens and the incident point on the end face of the optical fiber input end can rotate back and forth around the horizontal straight line L, any light beam can not always irradiate on the same point on the light inlet face of each lens and the same point on the end face of the optical fiber input end, and therefore the light inlet face of each lens and the end face of the optical fiber input end are not easy to burn by light.

Preferably, the multi-path optical signal single fiber transmission adapter further comprises a controller and a temperature sensor. The control end of the first motor and the temperature sensor are connected with the controller.

Preferably, the four temperature sensors are arranged, the first temperature sensor is arranged in a shading shell tube between the collimating light input round table and the first convex lens, the second temperature sensor is arranged in a shading shell tube between the first convex lens and the second convex lens, the third temperature sensor is arranged in a shading shell tube between the second convex lens and the third convex lens, and the fourth temperature sensor is arranged in a shading shell tube between the third convex lens and the lead-out optical fiber. Among the four temperature sensors, the temperature detected by the temperature sensor with the highest temperature detected at present is the temperature Y adopted by the multi-path optical signal single-fiber transmission adapter exclusively, and the temperature detected by other sensors is not adopted by the multi-path optical signal single-fiber transmission adapter at present. The greater the temperature Y, the less time it takes to stop the rotation X. Y is the temperature.

Preferably, the time for stopping the rotation X at a temperature Y above 30 degrees celsius is less than 30 minutes. The time to stop rotating X at a temperature Y between 20 and 30 degrees celsius is between 30 and 40 minutes. The time to stop rotating X at a temperature Y below 20 degrees celsius is greater than 40 minutes.

The invention can achieve the following effects:

The invention relates to a multipath optical signal single-fiber transmission adapter, which improves the optical fiber transmission effect by improving the number of the reflection optical paths intersecting with the optical fiber axis among a plurality of reflection optical paths formed by each optical signal in optical fiber transmission. The influence of return light of each signal light after being reflected at the optical fiber input end on the optical input signal can be eliminated. The optical fiber is convenient for a user to monitor and manage the transmission condition of the optical signal in the optical fiber. The intensity of a certain signal light ray entering the optical fiber can be judged through the return light of each signal light ray, and whether the corresponding optical signal has a signal or not can be monitored and managed. The three quantities of the position, the incidence angle and the incidence direction of each signal light ray at the incidence point of the optical fiber input end are convenient for a user to select. When a plurality of signal light rays are input into the same optical fiber for transmission, a user can select three quantities of the position of an incidence point of each signal light ray at the input end of the optical fiber, the incidence angle at the incidence point and the incidence direction. By increasing the incident light irradiation area of the optical fiber input end, the end face of the optical fiber input end is not easy to burn by light, so that the service life of the end face of the optical fiber input end is long, and the reliability is good. The light irradiation area of the incident light of the optical fiber input end is increased by integrally connecting the leading-in section optical fiber with the larger diameter at the left end of the leading-out optical fiber, so that the light intensity on the unit area is small, and the end face of the optical fiber input end is not easy to burn by light. The size of the incident light irradiation area of the end face of the optical fiber input end can be adjusted. The incidence point of each beam of light on the end face of the optical fiber input end can longitudinally move on the end face of the optical fiber input end, so that the light irradiation area on the end face of the optical fiber input end can be adjusted, the end face of the optical fiber input end is not easy to burn by light, the service life of the end face of the optical fiber input end is long, and the reliability is good. The included angle of the incident light of each signal light irradiated on the optical fiber input end can be freely adjusted. By enabling each signal ray to rotate around the same straight line, the time of the same light incident point on the component to be irradiated by light is shortened, and all components at the input end of the optical fiber are not easy to burn by light. Each light can swing longitudinally around the horizontal straight line L, so that the incidence point of the light on the light inlet surface of each lens and the incidence point on the end face of the input end of the optical fiber also swing longitudinally around the horizontal straight line L, any light beam can not always irradiate on the same point on the light inlet surface of each lens and the same point on the end face of the input end of the optical fiber, and therefore the light inlet surface of each lens and the end face of the input end of the optical fiber are not easy to burn by the light.

Drawings

Fig. 1 is a schematic view of a connection structure in a use state according to the present invention.

Fig. 2 is a schematic view of light transmission at the vertical plane of the left end of the extraction fiber according to the present invention.

Fig. 3 is a schematic diagram of a transmission connection structure of a partial light path when the reflected light eliminator is a first plane mirror and a fourth convex lens.

Fig. 4 is a schematic view of a transmission connection structure of a partial optical path when the reflected light eliminator is a conical reflector and the conical tip of the conical reflector is located at the left side of the intersection point a.

Fig. 5 is a schematic view of a transmission connection structure of a partial optical path when the reflected light eliminator is a conical reflector and the conical tip of the conical reflector is located right of the intersection a.

Fig. 6 is a schematic diagram of a use state connection structure of the present invention in which the light reflected by the outgoing optical fiber is provided with a transmission signal feedback monitoring management module.

Fig. 7 is a schematic view of a partial optical path transmission connection structure when the pitch-divided lens of the present invention is a concave lens.

Fig. 8 is a schematic view of a local optical path transmission connection structure when the pitch-divided lenses of the present invention are a fifth convex lens and a sixth convex lens.

Fig. 9 is a schematic diagram of a local optical path transmission connection structure in which the reflected light eliminator is a conical reflector, the cone tip of the conical reflector is located at the left side of the intersection point a, and a plurality of photoelectric sensors of the transmission signal feedback monitoring management module are arranged on a ring.

Fig. 10 is a schematic block diagram of a circuit schematic connection structure of the present invention.

Fig. 11 is a schematic view of a longitudinal section connection structure of the collimating light input circular table of the present invention.

Fig. 12 is a schematic cross-sectional view of a collimated light input cone according to the present invention.

FIG. 13 is a schematic cross-sectional view of a first slider of the present invention.

Fig. 14 is a schematic cross-sectional connection structure of the chute opening of the collimation light input truncated cone according to the invention.

FIG. 15 is a schematic cross-sectional view of a cross-sectional connection of the present invention having a first slider in the slot of the collimating light input circular table.

Fig. 16 is a schematic view showing a connection structure in a use state when a lead-in section of an optical fiber is integrally connected to a left end face of a lead-out optical fiber according to the present invention.

FIG. 17 is a schematic cross-sectional view of the left end face of an pigtail fiber of the present invention integrally connected to the middle of the right end face of the pigtail fiber.

Fig. 18 is a schematic view of a connection structure of the vertical plane of the left end of the optical fiber of the present invention when the vertical plane of the left end of the optical fiber is right of the right focal length midpoint U of the third convex lens.

Fig. 19 is a schematic view showing a connection structure of the vertical plane of the left end of the optical fiber lead-in section of the present invention at the midpoint U of the right focal length of the third convex lens.

FIG. 20 is a right side view of an exit fiber of the present invention.

Fig. 21 is a schematic view showing a light transmission structure in a use state in which the right focal point of the third convex lens of the present invention falls on a horizontal straight line L in the optical fiber at the lead-out section.

Fig. 22 is a schematic view of a light transmission structure in a use state in which the right focal point of the third convex lens of the present invention falls on a horizontal straight line L at the integral connection of the optical fiber in the lead-in section and the optical fiber in the lead-out section.

Fig. 23 is a schematic view showing a light transmission structure in a use state in which the right focal point of the third convex lens of the present invention falls on a horizontal straight line L in the optical fiber of the lead-in section.

FIG. 24 is a schematic view showing a light transmission structure when a right-angled light entrance surface is provided at a corner of the left end outer edge of an optical fiber lead-in section according to the present invention.

FIG. 25 is a schematic view showing a light transmission structure in a use state when a right inclined light entrance surface is provided at a corner of the left end outer edge of the optical fiber of the lead-in section.

Fig. 26 is a schematic view of a light transmission structure when a right inclined light inlet surface is disposed at a corner of an outer edge of a left end of an optical fiber of the present invention, and the inclined light inlet surface is a segmented inclined light inlet surface.

Fig. 27 is a schematic view of a light transmission structure in a use state when a right inclined light inlet surface is provided at a corner of an outer edge of a left end of an optical fiber of an introducing section and the inclined light inlet surface is a sectional inclined light inlet surface.

FIG. 28 is a schematic view of a fiber structure including several segments of the drop length of the present invention.

Fig. 29 is a schematic view showing a partial structure of the horizontal telescopic module of the present invention including a vertical rod and a horizontal cylinder.

Fig. 30 is a schematic view showing a partial structure of the horizontal telescopic module according to the present invention, which includes a vertical rod and a horizontal slider.

Detailed Description

The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.

Example 1: a multi-path optical signal single-fiber transmission adapter. See fig. 1, 2 and 10. The method comprises the following steps:

The collimating optical input round table comprises collimating optical input round table light g2, a first convex lens g4, a second convex lens g6, a third convex lens g7 and an outgoing optical fiber g25 which are sequentially arranged at intervals from left to right, wherein the central line of the collimating optical input round table, the left focus and the right focus of the first convex lens, the left focus and the right focus of the second convex lens, the left focus and the right focus of the third convex lens and the axial lead of the outgoing optical fiber all fall on the same horizontal straight line Lg 13. The collimating light input round table is provided with a plurality of fiber inserting holes g3 which can irradiate light rays on the first convex lens horizontally towards the right, and each light ray g14 irradiated on the first convex lens from each fiber inserting hole is parallel to a horizontal straight line L. The right focus g5 of the first convex lens coincides with the left focus of the second convex lens. The right focus of the third convex lens is located on the axis of the lead-out optical fiber. That is, the left end vertical plane g23 of the lead-out optical fiber is located to the left of the right focal point g12 of the third convex lens. The left end face of the outgoing optical fiber is a vertical plane, and the vertical plane of the left end of the outgoing optical fiber is perpendicular to the horizontal straight line L. Any light ray emitted from each fiber inserting hole horizontally to the right sequentially passes through the first convex lens, the second convex lens and the third convex lens and irradiates on the vertical plane of the left end of the lead-out optical fiber, and the included angle between the light ray g21 irradiated from the third convex lens on the vertical plane of the left end of the lead-out optical fiber and the horizontal straight line L is smaller than a set angle. After any light ray irradiated on the vertical plane of the left end of the extraction optical fiber is refracted in the extraction optical fiber, the refracted light ray g24 of the light ray is continuously transmitted rightward in the extraction optical fiber.

After any one light ray irradiated on the vertical plane of the left end of the extraction optical fiber is reflected on the vertical plane of the left end of the extraction optical fiber, the reflected light ray g22 or the intersection Ag28 of the extension line of the reflected light ray and the horizontal straight line L on the vertical plane of the left end of the extraction optical fiber is positioned on the horizontal straight line L between the extraction optical fiber and the third convex lens.

In this embodiment, any one of the light rays irradiated from the third convex lens onto the vertical plane at the left end of the extraction optical fiber has an included angle of less than 8 degrees with the horizontal straight line L.

The left end of a shading shell tube g47 is hermetically and rotatably connected to the outer edge of the right end of the collimating light input round table, and the right end of the shading shell tube is hermetically connected to the left end of the outgoing optical fiber, so that the right end face of the collimating light input round table, the first convex lens, the second convex lens, the third convex lens and the left end of the outgoing optical fiber are hermetically and light-tightly arranged in the shading shell tube. A driven gear ring g109 is fixedly sleeved on the right side end of the collimation light input round table, and a driven gear is arranged on the outer ring of the driven ring. The outer tube wall of the shading shell tube is fixedly provided with a first motor g106, a rotating shaft g107 of the first motor is provided with a driving gear g108, and the driving gear is meshed with the driven gear. The rotation of the rotating shaft of the motor I drives the driven gear ring to rotate, and the rotation of the driven gear ring drives the collimating light input round table to rotate.

The embodiment can prevent the end face of the input end of the optical fiber from being burnt by light, and can reduce the burnt of the first convex lens, the second convex lens and the third convex lens, and has long service life and good reliability.

The first motor is a stepping motor. The rotating shaft of the motor I uniformly rotates. When the rotating shaft of the motor I rotates, the rotating shaft firstly rotates clockwise by a Z-degree angle and then stops rotating for X minutes, and then rotates clockwise by the Z-degree angle and then stops rotating for X minutes. And then stopping rotating for X minutes after rotating for Z degrees clockwise. Then stopping rotating for X minutes after rotating Z degrees anticlockwise, and stopping rotating for X minutes after rotating Z degrees anticlockwise. Then stopping rotating for X minutes after rotating for Z degrees clockwise, and stopping rotating for X minutes after rotating for Z degrees clockwise. Then the rotation is stopped for X minutes after rotating clockwise for Z degrees. The rotating shaft of the motor I circularly rotates in a reciprocating way. And X is less than 60. Z is less than 10.

The multi-path optical signal single-fiber transmission adapter further comprises a controller, a temperature sensor g110 and a memory g111. The memory, the control end of the first motor and the temperature sensor are connected with the controller.

The four temperature sensors are arranged, the first temperature sensor is arranged in a shading shell tube between the collimating light input round table and the first convex lens, the first temperature sensor is arranged in the shading shell tube between the collimating light input round table and the first convex lens, the second temperature sensor is arranged in the shading shell tube between the first convex lens and the second convex lens, the third temperature sensor is arranged in the shading shell tube between the second convex lens and the third convex lens, and the fourth temperature sensor is arranged in the shading shell tube between the third convex lens and the lead-out optical fiber. Among the four temperature sensors, the temperature detected by the temperature sensor with the highest temperature detected at present is the temperature Y adopted by the multi-path optical signal single-fiber transmission adapter exclusively, and the temperature detected by other sensors is not adopted by the multi-path optical signal single-fiber transmission adapter at present. The greater the temperature Y, the less time it takes to stop the rotation X.

The time for stopping the rotation X at a temperature Y above 30 degrees celsius is less than 30 minutes. The time to stop rotating X at a temperature Y between 20 and 30 degrees celsius is between 30 and 40 minutes. The time to stop rotating X at a temperature Y below 20 degrees celsius is greater than 40 minutes.

Through rotating the input round platform light of collimation light, just can let to shine certain irradiation point on leading-out optic fibre left end face and can not be shone for a long time, can remove this irradiation point after like this at light, the temperature of this irradiation point can cool off, the output that can be fine protection leading-out optic fibre is difficult for being burnt, can prolong the life of leading-out optic fibre greatly. In the same way, each convex lens is not easy to burn. Each light ray can rotate back and forth around the horizontal straight line L, so that the incident point of the light on the light inlet face of each lens and the incident point on the end face of the optical fiber input end can rotate back and forth around the horizontal straight line L, any light ray can not always irradiate on the same point on the light inlet face of each lens and the same point on the end face of the optical fiber input end, and therefore the light inlet face of each lens and the end face of the optical fiber input end are not easy to burn by the light. The optical fiber has the advantages that the end face of the input end of the optical fiber is not easy to burn by light, the first convex lens, the second convex lens and the third convex lens can be reduced from being burnt, the service life is long, and the reliability is good. The back and forth rotation corresponds to a back and forth oscillation.

A shading cloth cover g1 is arranged on the left end face of the collimation light input round table, and a cover hole g93 with an orifice size capable of being elastically expanded and contracted is arranged on the shading cloth cover opposite to each fiber inserting hole. A shade cloth cover g92 capable of covering the corresponding cover hole is respectively arranged on the shade cloth cover above each cover hole.

A strip-shaped opening (not shown in the drawing) is arranged on the shading cloth cover opposite to each chute opening. Fur (not shown in the drawings) is provided on the shade cloth at each strip-shaped opening. The shading cloth cover shields extraneous light outside from entering the fiber inserting holes to cause interference to light transmission. The fluff can prevent light and dust from entering the chute opening.

The hole opening size can be elastically expanded and contracted, namely, an elastic rubber ring is arranged in the hole opening on the shading cloth cover. The size of the hole opening can be elastically expanded and contracted, and the size of the sleeve opening can be elastically expanded and contracted like the sleeve opening of the coat sleeve with the elastic band. Thus, the size of the orifice on the shade cloth cover can be elastically expanded and contracted. The shading cloth cover and the shading cloth curtain shade extraneous light outside from entering the fiber inserting holes to cause interference to light transmission.

The light entering the extraction fiber becomes the optical signal to be transmitted in the extraction fiber. Each section of light in the outgoing optical fiber is intersected with the optical fiber axial lead.

Since the light propagates in a straight line in the homogeneous medium. The core of the exit fiber is a uniform medium so that the light propagates straight through each segment of light within the exit fiber.

The first convex lens mainly reduces the distance between a plurality of light rays of the collimated light input on the round table, and the first convex lens reduces the distance between a plurality of light rays, so that the second convex lens is convenient to use. The second convex lens mainly converts the light rays after the first convex lens is contracted into a plurality of parallel light rays and transmits the parallel light rays to the third convex lens for use. The third convex lens has a longer focal length, and the longer focal length can enable the included angle between each light ray and the horizontal straight line L to be smaller, can reduce the reflection quantity of the light ray after reflection, can increase the energy of the light ray after refraction and then is emitted into the leading-out optical fiber, namely can enable more light signals to be emitted into the leading-out optical fiber.

In the present application, light signals, light rays, signal light rays, signals are all the same meaning, and these words are sometimes used in combination for convenience of description.

In the present application, the optical fiber and the outgoing optical fiber are the same meaning, and for convenience of description, these terms are sometimes used in combination.

The transmission of optical signals in optical fibers is mainly achieved by the principle of total reflection of light. The loss of the optical signal transmitted in the optical fiber is related to the use environment and the quality of the optical fiber, and the three factors of the path length of the optical signal in the optical fiber transmission, the number of reflection points and the positions of the reflection points are included.

The first factor is that the length of the light beam traveling in the fiber affects the loss of the optical signal. The longer the path of transmission, the greater the loss of the optical signal and the longer the path the longer the optical signal needs to be transmitted in the optical fiber, the greater the delay of the optical signal across the optical fiber, and thus it is necessary to reduce the path of light in the optical fiber transmission.

The second factor is that the number of reflection points of light in the fiber transmission also affects the optical signal loss. The optical signal is generally transmitted in the optical fiber after being reflected by countless reflecting points, but the optical signal is not necessarily totally reflected at each reflecting point, and the optical signal may be reflected by refractive light at some reflecting points. Reflection points where no total reflection occurs will produce refracted and reflected light. The refracted light causes a loss of the optical signal, which is transmitted in the fiber as a primary function of reflected light, and preferably total reflected light. Because the optical fiber can be bent in the use process, and the optical fiber can also generate uneven conditions between the fiber core and the cladding in the production process, the light rays at some reflection points generate refraction light in the optical fiber transmission process, and the light rays at the reflection points are not totally reflected. However, the use environment and the light quality of the optical fiber are basically fixed after the optical fiber line is built. Therefore, in order to reduce the loss of the optical signal in the optical fiber transmission, the transmission distance is further, and the number of reflection points of the light in the optical fiber transmission is necessary to be reduced.

A third factor is that the position of the reflection point of the light transmitted in the fiber also affects the optical signal loss. The position of the reflection point affects the two former factors, if each reflection point of a signal light is in the same plane with the axis of the outgoing optical fiber, at this time, each section of reflection light of the signal light in the outgoing light is in the same plane with the axis of the outgoing optical fiber, so that the length of each section of reflection light of the signal light in the outgoing light is longest, thus not only reducing the number of reflection points, but also making the transmission path shortest, and therefore, it is necessary to control the position of the reflection point of the light in the optical fiber transmission.

The path is in direct proportion to the light path. The two factors of the length of the optical signal path and the number of reflection points in the optical fiber transmission are related to the three factors of the position of the incidence point of the signal light at the input end of the optical fiber, the incidence angle at the incidence point and the incidence direction. The transmission path and transmission speed of the optical signal in the optical fiber can be different under different incident angles. The incident angle refers to the angle between the signal light and the axis of the fiber.

When the signal light of the input end of the optical fiber enters the optical fiber at a larger incident angle, the optical signal can be reflected for multiple times in the optical fiber and presents a tortuous transmission light path. The longer the transmission path, the greater the loss of the optical signal and the more likely the optical signal is distorted.

When the signal light at the input end of the optical fiber propagates along the axial lead of the optical fiber, the incident angle is zero, but the input signal light can generate echo at the input end of the optical fiber at this time, namely return light, namely reflected light returns from an original path, the reflected light is overlapped on the original signal of the light, and ghost images can influence the sensitivity of the optical signal. Therefore, the application adopts the incident light which irradiates on the vertical plane of the left end of the outgoing optical fiber and the included angle of the axial lead of the optical fiber to be smaller than 8 degrees. The vertical plane of the left end of the outgoing optical fiber is the input end face of the optical fiber.

When the light rays deviate from the axial line of the optical fiber, the incident angle changes, and the longer the light path appears, the more the refraction points are, and the transmission characteristics of the signal light rays in the optical fiber at different incident angles are also different.

When the signal light enters the optical fiber at a small incident angle, the number of times the optical signal is refracted in the optical fiber is small, and the propagation distance of the optical signal becomes longer. This is because a smaller angle of incidence reduces reflection and scattering between the optical signal and the light path, thereby reducing signal propagation losses.

The transmission speed of signal light rays in the optical fiber at different incidence angles can also be different. When light enters a single-mode fiber at a large incident angle, the light signal is reflected for multiple times in the fiber and takes a folded transmission light path. As a result, the transmission speed of the optical signal decreases, resulting in an increase in the delay of signal transmission. Therefore, a smaller incident angle of the signal light is adopted, so that the transmission speed and the instantaneity of the signal are ensured.

Transmission losses of optical signals in the optical fiber at different angles of incidence may also vary. As the angle of incidence increases, reflection and scattering between the optical signal and the optical fiber increases, resulting in increased transmission loss of the signal. Therefore, in the optical communication multiplexing optical signal single fiber transmission adapter, a smaller incident angle is selected in order to reduce the transmission loss of the signal.

See fig. 2. The included angle between any light ray on the vertical plane of the left end of the incident and outgoing optical fiber and the axial lead of the optical fiber is smaller than 8 degrees. So that the incident light rays enter the optical signal toward the optical fiber in a tapered space g46 having an opening angle of 16 degrees.

The focal length of the first convex lens is smaller than that of the third convex lens. The focal length of the second convex lens is smaller than that of the third convex lens. The setting of the focal length can shorten the distance between the collimation light input round table and the extraction optical fiber, so that the volume of the multichannel optical signal single-fiber transmission adapter is small.

The diameter of the collimation light input round table is smaller than or equal to the diameter of the first convex lens. By the arrangement, any light emitted horizontally to the right in each fiber inserting hole of the collimating light input round table can be irradiated on the first convex lens, and the reliability is good.

The diameter of the first convex lens is larger than that of the second convex lens. The diameter of the second convex lens is larger than that of the third convex lens. In this setting of the diameter, the return light from the left surface of the second convex lens to the right surface of the first convex lens is not reflected to the second convex lens, and the return light from the left surface of the third convex lens to the right surface of the second convex lens is not reflected to the third convex lens, thereby reducing the interference of the return light.

The right surface of the collimation light input round table is coated with a light absorption layer g94. Or the right surface of the collimation light input round table is a black surface. The absorption of light by the light absorption layer and the black surface is large, the reflection of light on the light absorption layer or the black surface is small, so that the reflected light which is irradiated back to the right surface of the collimation light input round table from the first convex lens can not be reflected to the first convex lens, and the interference of the returned light can be reduced.

When in use, the output ends of a plurality of single optical fibers g27 for transmitting single optical signals are inserted and connected in the fiber inserting holes one by one, and the light rays output from the single optical fibers can be horizontally irradiated on the first convex lens. The optical fiber for long distance transmission is connected to the right end face of the outgoing optical fiber, or the optical fiber for long distance transmission and the right end of the outgoing optical fiber are integrally welded and connected.

Therefore, each single optical signal sequentially passes through the first convex lens, the second convex lens and the third convex lens and irradiates on the vertical plane at the left end of the outgoing optical fiber, and the refraction light of the single optical signal enters the outgoing optical fiber to continue to transmit towards the right. In this embodiment, the included angle between each light ray irradiated onto the vertical plane at the left end of the extraction optical fiber and the horizontal straight line L is smaller than 8 degrees, and the reflected light ray is reflected. In the embodiment of the application, three factors of the position of the incidence point of the signal light on the input end face of the optical fiber, the incidence angle at the incidence point and the incidence direction are solved. The position of the incidence point of the signal light on the optical fiber input end face can be any position on the optical fiber input end face. Since the left end face of the extraction fiber is a vertical plane, the normal line of each light ray irradiated on the vertical plane of the left end of the extraction fiber is parallel to the horizontal straight line L.

The magnitude of the incident angle of the signal light at the incident point is only less than 8 degrees. The incident ray direction of the signal light rays on the vertical plane at the left end of the outgoing optical fiber can be within 360 degrees around the horizontal straight line L. I.e. the range of incident light is in a space within the class of conical ranges with a cone angle of 16 degrees.

The embodiment can increase the number of the reflection light paths intersecting with the optical fiber axis line in a plurality of reflection light paths formed by each optical signal in optical fiber transmission, so that the length of each reflection light path of each light ray is as long as possible, and the effect of optical fiber transmission can be improved. When a plurality of signal light rays are input into the same optical fiber for transmission, a user can select three quantities of the position of an incidence point of each signal light ray at the input end of the optical fiber, the incidence angle at the incidence point and the incidence direction. The included angle of the incident light rays irradiated on the input end of the optical fiber by the optical signal can be freely selected by a user within a set range of 8 degrees.

Example 2: see fig. 1, 2 and 3. Embodiment 2 differs from embodiment 1 in that embodiment 2 adds a reflected back light canceller, specifically as follows:

A reflected light canceller g26 is provided between the No. three convex lens and the extraction optical fiber, and the reflected light canceller does not block light irradiated from the No. three convex lens onto the vertical plane of the left end of the extraction optical fiber.

After any light ray irradiated on the vertical plane of the left end of the lead-out optical fiber is reflected on the vertical plane of the left end of the lead-out optical fiber, the reflected light ray on the vertical plane of the left end of the lead-out optical fiber is reflected outwards through the reflecting surface of the reflection back light eliminator. And the reflected light can not irradiate on the third convex lens nor the vertical plane at the left end of the outgoing optical fiber.

Two ends of a first rod g8 are respectively fixedly connected to the reflected light eliminator and the right surface of the third convex lens.

The reflected light eliminator comprises a first plane reflector g9 and a fourth convex lens g10, wherein the first plane reflector is arranged between the third convex lens and the outgoing optical fiber, the fourth convex lens is arranged between the first plane reflector and the outgoing optical fiber, and the center point of the reflecting surface of the first plane reflector, the left focus and the right focus of the fourth convex lens are all on a horizontal straight line L. And setting an intersection point A of the reflected light rays irradiated onto the vertical plane at the left end of the extraction optical fiber from the third convex lens and reflected by the vertical plane at the left end of the extraction optical fiber and the horizontal straight line L as an intersection point A. The right focus of the fourth convex lens coincides with the intersection point A. After any one light ray irradiated to the vertical plane at the left end of the lead-out optical fiber is reflected on the vertical plane at the left end of the lead-out optical fiber, the reflected light ray firstly passes through the fourth convex lens and then irradiates to the reflecting surface of the first plane reflector to be reflected outwards.

And a first anti-reflection wafer g11 is arranged between the fourth convex lens and the lead-out optical fiber, a round hole is formed in the middle of the first anti-reflection wafer, and the hole core line of the round hole of the first anti-reflection wafer falls on a horizontal straight line L. After any one light ray irradiated on the vertical plane of the left end of the leading-out optical fiber is reflected on the vertical plane of the left end of the leading-out optical fiber, the reflected light ray firstly passes through the round hole of the first anti-reflection wafer, and then passes through the fourth convex lens and irradiates on the first plane reflector to be reflected outwards.

The reflecting surface of the first plane reflector is arranged towards the upper right, and an included angle between the reflecting surface of the first plane reflector and the horizontal straight line L is 45 degrees, so that light rays irradiated on the first plane reflector are reflected upwards.

See fig. 3. In this embodiment, the reflected light ray g80 reflected outward from the first plane mirror cannot be irradiated to neither the third convex lens nor the vertical plane at the left end of the lead-out optical fiber.

In this embodiment, the center point of the reflecting surface of the reflected light canceller also falls on the horizontal straight line L. The embodiment can well eliminate the return light of each signal ray after being reflected at the input end of the optical fiber.

When the signal light at the input end of the optical fiber propagates along the axial lead of the optical fiber, the incident angle is zero, but the input signal light can generate echo at the input end of the optical fiber at this time, namely return light, namely reflected light returns from an original path, the reflected light is overlapped on the original signal of the light, and ghost images can influence the sensitivity of the optical signal. The embodiment eliminates the reflected light reflected from the vertical plane at the left end of the extraction fiber from any one of the incident light rays by the reflected light eliminator.

If the light reflected on the vertical plane at the left end of the lead-out optical fiber is not eliminated by the back reflection light eliminator, the reflected light of the two optical signals which are arranged on the collimating optical input round table in a central symmetry way enters the mutual input optical paths and is reflected back, and the optical signals at the transmitting end are affected.

Since the left end face of the lead-out optical fiber is a vertical plane, and the vertical plane of the left end of the lead-out optical fiber is perpendicular to the horizontal straight line L. The right focus of the third convex lens is located on the axis of the lead-out optical fiber. The left vertical plane of the outgoing fiber is located to the left of the right focal point g12 of the third convex lens. So that each reflected ray on the vertical plane at the left end of the outgoing optical fiber intersects the horizontal straight line L at the same intersection point a. So that each reflected light can be reflected out only by providing the reflected back light eliminator at or near the intersection point a, thereby realizing elimination of the influence of the back light caused by the reflected light on the optical input signal. The embodiment can eliminate the return light of each signal ray after being reflected at the input end of the optical fiber, and has good reliability.

Example 3, see figures 1, 2,4, 5. Embodiment 3 is different from embodiment 2 in that their structure of the reflected light canceller is different, specifically as follows:

The reflected light eliminator comprises a conical reflector g34, wherein the conical tip of the conical reflector faces to the leading-out optical fiber, and the conical bottom surface of the conical reflector faces to the third convex lens. The reflecting surface of the conical reflecting mirror is positioned on the conical surface of the conical reflecting mirror. The bottom center point of the conical reflector and the cone tip center point of the conical reflector are both located on a horizontal straight line L. After the light irradiated onto the vertical plane at the left end of the extraction optical fiber from the third convex lens is reflected on the vertical plane at the left end of the extraction optical fiber, the intersection point of the reflected light and the horizontal straight line L is set as an intersection point A. The conical tip of the conical reflector is positioned at the left side or the right side of the intersection point A. Any light ray irradiated on the vertical plane of the left end of the leading-out optical fiber is reflected by the vertical plane of the left end of the leading-out optical fiber, and the reflected light ray is reflected outwards after being reflected by the reflecting surface of the conical reflector.

See fig. 4 and 5. In this embodiment, the reflected light ray g81 reflected by the reflecting surface of the conical reflector toward the outside cannot be irradiated onto neither the third convex lens nor the vertical plane at the left end of the lead-out optical fiber.

The embodiment can eliminate the problem of influence of return light on the optical input signal after each signal light is reflected at the optical fiber input end. The reflected light eliminator of the embodiment is simple in structure and good in reliability.

Example 4, see figures 1,2, 3, 6, 7, 8, 10. Embodiment 4 is different from embodiment 2 in that embodiment 4 uses the light reflected by the reflected light canceller of embodiment 2 to monitor and manage the transmission signal, and specifically includes the following steps:

The multichannel optical signal single-fiber transmission adapter also comprises a display g29, a data processing module g30, a controller g31 and a transmission signal feedback monitoring management module g16, wherein the transmission signal feedback monitoring management module comprises photoelectric sensors g17 with the same number as the fiber inserting holes. The display, the data processing module and each photoelectric sensor are respectively connected with the controller. Each light ray reflected from the reflecting surface of the back light eliminator can be detected by the photoelectric sensor one by one.

The transmission signal feedback monitoring management module further comprises a light inter-light distance separation mechanism g83, wherein the light inter-light distance separation mechanism comprises a distance separation lens g82 and a second plane reflector g20 which are arranged at intervals from left to right, and the center points of the left focus and the right focus of the distance separation lens and the reflecting surface of the second plane reflector are all located on the same straight line Kg 15. The second plane reflector can reversely irradiate each light ray reflected by the first plane reflector to the interval separating lens, and the light rays are irradiated to the corresponding photoelectric sensors one by one after passing through the interval separating lens.

And a second anti-reflection wafer g19 is arranged between the spacing separation lens and the second plane reflector, a round hole is arranged in the middle of the second anti-reflection wafer, and the hole core line of the round hole of the second anti-reflection wafer falls on a straight line K. After any one light ray irradiated onto the second plane reflector is reflected by the second plane reflector, the reflected light ray firstly passes through the round hole of the second anti-reflection wafer, and then is irradiated onto the corresponding photoelectric sensor one by one after passing through the spacing separation lenses.

Referring to fig. 7, the pitch-divided lens is a concave lens g18, and both the left and right focal points of the concave lens fall on the straight line K.

Referring to fig. 8, or the pitch-divided lenses are a fifth convex lens g33 and a sixth convex lens g32 arranged at intervals from left to right, and the left and right focal points of the fifth convex lens, the left and right focal points of the sixth convex lens all fall on the straight line K. The right focus of the fifth convex lens is overlapped with the left focus of the sixth convex lens, and the focal length of the fifth convex lens is smaller than that of the sixth convex lens.

The present embodiment uses the light reflected from the reflected light canceller to monitor and manage the transmission signal. The effect of light returning in the transmission process is fully utilized, the strength of the light returning of each signal light ray can be roughly judged, and whether a corresponding optical signal has a signal or not can be monitored and managed.

Example 5, see figures 1,2,3, 9, 10. Embodiment 5 is different from embodiment 3 in that embodiment 5 uses the light reflected by the reflected light canceller of embodiment 3 to monitor and manage the transmission signal, and specifically includes the following steps:

The multichannel optical signal single-fiber transmission adapter also comprises a display, a data processing module, a controller and a transmission signal feedback monitoring management module, wherein the transmission signal feedback monitoring management module comprises photoelectric sensors with the same number as the fiber inserting holes. The display, the data processing module and each photoelectric sensor are respectively connected with the controller. Each light ray reflected from the reflecting surface of the back light eliminator can be detected by the photoelectric sensor one by one.

In this embodiment, the present invention is applicable to a variety of applications. The several photoelectric sensors of the transmission signal feedback monitoring management module are arranged on the inner ring of an annular ring g 45. In this embodiment, the light reflected by the reflected light canceller is used to monitor and manage the transmission signal. The effect of light returning in the transmission process is fully utilized, the strength of the light returning of each signal light ray can be roughly judged, and whether a corresponding optical signal has a signal or not can be monitored and managed.

Example 6, see fig. 1, 2, 11-15. Embodiment 6 is different from embodiment 1 in that a position-fixed fiber inserting hole and/or a position-adjustable fiber inserting hole are provided on the collimating light input circular truncated cone, and the position of the position-adjustable fiber inserting hole is adjusted by a first screw, specifically as follows:

The fiber inserting holes comprise fiber inserting holes g35 with fixed positions and/or fiber inserting holes g36 with adjustable positions, the hole core line of each fiber inserting hole is parallel to the horizontal straight line L, and the left end and the right end of each fiber inserting hole are respectively communicated with the left end and the right end of the collimating light input round table.

The collimating light input round table is provided with a plurality of chute ports g39, the left end and the right end of the chute ports are respectively communicated with the left end and the right end of the collimating light input round table, the longitudinal section of the chute ports is rectangular, the longitudinal center line of the chute ports is vertically intersected with a horizontal straight line L, the transverse center line of the chute ports is parallel with the horizontal straight line L, and anti-rotation grooves g40 are formed in the front and rear chute walls in the chute ports. A first sliding block g41 is longitudinally arranged in the sliding groove in a sliding way, the longitudinal section of the first sliding block is rectangular, and anti-rotation sliding blocks g42 matched with the anti-rotation grooves are integrally arranged on the front side wall and the rear side wall of the first sliding block. The outer notch of the chute opening is fixedly provided with a first nut g37, a first screw g38 is spirally arranged in a screw hole of the first nut, the front end of the first screw is rotationally connected to the outer surface of the first slide block, the first slide block can longitudinally move in the chute opening under the driving of the first screw, and the fiber inserting hole with adjustable positions is formed in the first slide block.

A first extrusion spring g44 is arranged in the chute opening, one end of the first extrusion spring is fixedly connected to the bottom surface of the chute opening, and the other end of the first extrusion spring is connected to the first sliding block in an extrusion mode.

And a second extrusion spring g43 is arranged in the sliding slot, the second extrusion spring is movably sleeved on the first screw, one end of the second extrusion spring is connected to the first nut in an extrusion manner, and the other end of the second extrusion spring is connected to the first sliding block in an extrusion manner.

The present embodiment allows a user to select three amounts of the position of the incident point of each signal ray at the input end of the optical fiber, the magnitude of the incident angle at the incident point, and the incident direction. The included angle of the incident light rays irradiated on the input end of the optical fiber by the optical signal can be freely selected by a user within a set range of 8 degrees. The use is convenient and simple, and the reliability is high.

Example 7, see FIGS. 1-5, 16-23. Example 7 differs from example 1, or from example 2, or from example 3 in that a lead-in section optical fiber is integrally connected to the left end face of the lead-out optical fiber, specifically as follows:

The left end face of the lead-out optical fiber is integrally connected with a lead-in section optical fiber g84, and the medium of the lead-in section optical fiber and the medium of the lead-out optical fiber are the same uniform medium. The radius R2 of the lead-in section is greater than the radius R1 of the lead-out fiber. The left end face of the leading-out optical fiber is integrally connected to the middle of the right end face g85 of the leading-in optical fiber, and the axial lead of the leading-in optical fiber and the axial lead of the leading-out optical fiber fall on the horizontal straight line L. The left end face of the lead-in section fiber includes a vertical plane, and the left end vertical plane g86 of the lead-in section fiber is perpendicular to the horizontal straight line L. The vertical plane of the left end of the lead-in section optical fiber is positioned right of the midpoint of the right focal length of the third convex lens. After any light ray irradiated on the vertical plane of the left end of the lead-in section optical fiber is refracted in the lead-in section optical fiber, the refracted light ray can be transmitted rightward from the lead-in section optical fiber and directly enter the lead-out optical fiber, and the refracted light ray is continuously transmitted rightward in the lead-out optical fiber.

The right focal length of the third convex lens is the right focal length of the third convex lens. In the present application, the lead-in section optical fiber and the lead-out optical fiber are optical fibers in practice, and only the diameter of the lead-in section optical fiber is larger than that of the lead-out optical fiber, so that for convenience of description, the optical fiber is sometimes referred to as the lead-in section optical fiber, and the optical fiber is sometimes referred to as the lead-out optical fiber, which is understood according to the specific context.

Let the intersection of the reflected light ray irradiated onto the left end vertical plane of the lead-in fiber and the horizontal straight line L be also intersection a. The right end face of the lead-in section fiber is also perpendicular to the horizontal straight line L, and the left end face of the lead-out fiber is also perpendicular to the horizontal straight line L. Since the incident angle of the light is equal to the reflection angle, the midpoint of the right focal length of the third convex lens falls on a horizontal straight line L located to the left of the vertical plane of the left end of the lead-in optical fiber.

See fig. 24. An incident ray which irradiates the outermost side of the vertical plane at the left end of the optical fiber at the leading-in section is set as a Q1 ray, and the Q1 ray passes through the F point position on the third convex lens.

The following expressions can be obtained from the trigonometric relationship:

Wherein, the right focal length of ED third lens. EB is the spacing between the third convex lens and the vertical plane of the left end of the lead-in section of optical fiber. BC and X1 are both lengths of the lead-in section fiber, and the length X1 of the lead-in section fiber is less than half of the right focal length of the No. three convex lens. CD is the distance between the right focus of the third convex lens and the left end face of the lead-out optical fiber. R2 is the radius of the lead-in section fiber. R1 is the radius of the pigtail fiber. S1 is the incident angle of the light, S1 is the included angle between the light emitted to the right on the third convex lens and the horizontal straight line L, and S1 is smaller than 8 degrees. S2 is the refraction angle of the light. n is the refractive index of the lead-in section of optical fiber and the refractive index of the lead-out optical fiber is also n. E is the center point of the third convex lens, B is the intersection point of the vertical plane of the left end of the lead-in section optical fiber and the horizontal straight line L, C is the intersection point of the right end surface of the lead-in section optical fiber and the horizontal straight line L, and D is the right focus of the third convex lens. EF is the distance between the center point E of the third convex lens and the point F on the third convex lens.

The leading-in section optical fiber and the leading-out optical fiber of the leading-out optical fiber are integrally connected, and the leading-in section optical fiber and the leading-out optical fiber are optical fibers with the same uniform medium, so that light enters the leading-out optical fiber from the leading-in section optical fiber and is still linearly transmitted at the joint of the leading-in section optical fiber and the leading-out optical fiber, and the leading-out optical fiber cannot be bent.

The diameter of the outgoing optical fiber is equal to that of the common light, and the medium of the outgoing optical fiber is identical to that of the common optical fiber, namely the incoming optical fiber, the outgoing optical fiber and the common light are all made of the same uniform medium. The lead-in section optical fiber and the lead-out optical fiber are integrally connected, and light rays are transmitted in a straight line at the integral connection part of the lead-in section optical fiber and the lead-out optical fiber and are not refracted and reflected.

The refractive light, and extension of the incident light when the vertical plane of the left end of the lead-in section fiber is to the right of the right focal length midpoint U of the No. three convex lens are shown in fig. 18.

The arrangement of the lead-in section optical fiber ensures that the irradiation area of a plurality of incident light rays with constant incidence angles on the vertical plane at the left end of the lead-in section optical fiber is larger than the irradiation area of the plurality of incident light rays on the vertical plane at the left end of the lead-out optical fiber. The irradiation area of the incident light is increased, under the condition that the light intensity of the incident light is unchanged, the light intensity obtained on the same unit area is small, because the light can generate heat at the input end of the optical fiber, the light intensity is small, and the burn of the light to the irradiation position is small, the burn of the light to the vertical plane of the left end of the outgoing optical fiber can be eliminated, the burn of the light to the vertical plane of the left end of the outgoing optical fiber can be reduced, the service lives of the outgoing optical fiber and the incoming optical fiber are prolonged, and the reliability is good.

The left end face of the lead-out optical fiber is integrally connected with the lead-in optical fiber, and the distance between the intersection point of the reflected light on the vertical plane of the left end of the lead-in optical fiber and the horizontal straight line L and the third convex lens is smaller than the distance between the intersection point of the reflected light on the vertical plane of the left end of the lead-out optical fiber and the horizontal straight line L and the third convex lens. This facilitates subsequent processing of the reflected back light.

Example 8, see FIGS. 1-5, 16-23, and 24-25. Embodiment 8 differs from embodiment 7 in that embodiment 8 is provided with a right-angled light entrance surface at the corner of the outer edge of the left end of the stub fiber, specifically as follows:

an inclined light inlet surface g88 inclined towards the right is arranged at the corner of the outer edge of the left end of the lead-in section optical fiber. And the included angle between the inclined light inlet surface and the vertical plane of the left end of the optical fiber of the leading-in section is larger than The included angle between the oblique light inlet surface and the vertical plane of the left end of the optical fiber of the leading-in section is smaller than/>。

Wherein E is the center point of the third convex lens, D is the right focus of the third convex lens, W is the point on the third convex lens, and EW is the interval between the center point E of the third convex lens and the point W on the third convex lens. ED is the right focal length of the third convex lens.

An incident light ray which irradiates the outermost side of the oblique light inlet surface at the left end of the optical fiber of the introducing section is set as Q2 light ray, and the Q2 light ray passes through the W point position on the third convex lens. And the included angle between the inclined light inlet surface and the vertical plane of the left end of the lead-in section optical fiber is set as +.T, the included angle T meets the following formula:

。

the inclined light-entering surface of this embodiment is a straight inclined light-entering surface g87.

Since the reflection angle of each incident light ray irradiated onto the inclined light-inlet surface is located at the outer side of the corresponding incident light ray, the reflection light ray of each incident light ray irradiated onto the inclined light-inlet surface can be reflected outwards. Because of the condensing effect of the third convex lens, on a section of linear inclined light-entering surface, the reflection angle of the incident light ray which is closer to the outer side is smaller, and the reflection angle of the incident light ray which is closer to the inner side is larger. That is, on a linear oblique light-entering surface, the reflection angle of an incident ray of light which is farther from the left vertical plane of the lead-in optical fiber is smaller, and the reflection angle of an incident ray of light which is closer to the left vertical plane of the lead-in optical fiber is larger.

Any light ray on the linear inclined light inlet surface irradiated to the left end of the introducing section optical fiber is reflected outwards at the reflected light ray g89 of the linear inclined light inlet surface. See fig. 25. Since the inclined light-in surface is linear, the reflected light rays reflected from the linear inclined light-in surface intersect at a point. That is, the reflected light rays of the incident light rays on the same oblique line intersect at a point. The oblique line is located in the same plane as the horizontal line L.

See fig. 21. The right focus of the third convex lens is located in the outgoing optical fiber. See fig. 22. The right focus of the third convex lens is located in the integral joint of the lead-in section optical fiber and the lead-out optical fiber. See fig. 23. The right focus of the third convex lens is located in the lead-in section optical fiber.

See fig. 23. The method comprises the steps of irradiating incident light on a left vertical plane of an optical fiber of an introducing section, reflecting light of the incident light on the left vertical plane of the optical fiber of the introducing section, irradiating the incident light on a left oblique light inlet surface of the optical fiber of the introducing section, irradiating the incident angle of the incident light on the left vertical plane of the optical fiber of the introducing section, irradiating the normal line of the incident light on the left oblique light inlet surface of the optical fiber of the introducing section, irradiating the incident angle of the incident light on the left oblique light inlet surface of the optical fiber of the introducing section, irradiating the normal line of the incident light on the left oblique light inlet surface of the optical fiber of the introducing section when the included angle of the incident light and the normal line is larger than 0 degree and smaller than 8 degrees, irradiating the refractive light of the incident light in the optical fiber of the introducing section on the left vertical plane of the optical fiber of the introducing section, irradiating the refractive light of the incident light in the optical fiber of the introducing section on the left oblique light inlet surface of the optical fiber of the introducing section, and the left vertical plane of the optical fiber of the introducing section.

The inclined light inlet surface further increases the irradiation area of incident light of the optical fiber at the leading-in section, can reduce burn of light on a vertical plane at the left end of the optical fiber at the leading-in section, and can greatly prolong the service lives of the optical fiber at the leading-out section and the optical fiber at the leading-in section.

Example 9, see FIGS. 24-25, and 26-27. Embodiment 9 is different from embodiment 8 in that the oblique light inlet surface of embodiment 9 is a segmented oblique light inlet surface, and specifically includes the following steps:

The inclined light inlet surface is a sectional inclined light inlet surface g90. And the included angles between each section of inclined light inlet surface of the sectional inclined light inlet surface and the vertical plane of the left end of the optical fiber of the leading-in section are not equal. The closer the distance from the vertical plane of the left end of the optical fiber of the lead-in section is, the smaller the included angle between the sectional inclined light inlet surface and the vertical plane of the left end of the optical fiber of the lead-in section is. The farther the distance from the vertical plane of the left end of the optical fiber of the lead-in section is, the larger the included angle between the sectional oblique light inlet surface and the vertical plane of the left end of the optical fiber of the lead-in section is.

The sectional type oblique light inlet surface or the stepped oblique light inlet surface is convenient for sectional arrangement, so that the included angle between the incident light on each section of oblique light inlet surface and the normal is smaller than a set angle, and the stronger the light signal emitted into the optical fiber of the introducing section is. The sectional inclined light inlet surface of the embodiment has three sections, namely a first section inclined light inlet surface, a second section inclined light inlet surface and a third section inclined light inlet surface.

Any light ray irradiated to the sectional oblique light inlet surface at the left end of the lead-in section optical fiber is reflected outwards at the reflected light ray g91 of the sectional oblique light inlet surface. See fig. 27. Because the inclined light inlet surface is segmented, the reflected light rays reflected by the segmented inclined light inlet surface cannot intersect at one point. Only two reflected rays on the same section of oblique light-entering surface can intersect. And in this embodiment. Any one of the light rays irradiated from the third convex lens to the inclined light inlet surface at the left end of the lead-out optical fiber has an included angle of more than 8 degrees with a horizontal straight line L. The inclined light inlet surface is a sectional inclined light inlet surface, so that the light intensity entering the optical fiber at the leading-in section is high, the inclined light inlet surface at each section is more required to be arranged, and the flexibility is good.

Embodiment 10, see fig. 16-23, 28. Embodiment 10 differs from embodiment 7 in that the drop section optical fiber of embodiment 10 includes several sections, specifically as follows:

The lead-in section optical fiber comprises a plurality of sections which are sequentially and integrally connected from left to right, and the diameter of the lead-in section optical fiber positioned at the left is larger than that of the lead-in section optical fiber positioned at the right in the two adjacent sections of lead-in section optical fibers. The left end face of the outgoing optical fiber is integrally connected to the middle part of the right end face of the rightmost optical fiber section.

The leading-in section optical fiber is formed by integrally connecting a plurality of sections in sequence, so that the medium quantity required by suddenly increasing the diameter of the leading-in section optical fiber can be reduced, and the cost is low.

Example 11, see fig. 1,2, 29, 10. Embodiment 11 is different from embodiment 1 in that the optical signal single fiber transmission adapter further includes a horizontal expansion module capable of driving the third lens to move horizontally, and specifically includes the following steps:

The horizontal telescopic module comprises a vertical rod g98 and a horizontal cylinder g95 of which the telescopic rod stretches horizontally left and right, the upper end of the vertical rod is fixedly connected to the outer edge of the third convex lens, and the front end of a telescopic rod g96 of the horizontal cylinder is fixedly connected to the vertical rod. The telescopic rod of the horizontal cylinder stretches horizontally left and right to drive the third convex lens to move horizontally left and right. The cylinder seat of the horizontal cylinder is fixed in the shading shell tube. The horizontal telescopic module further comprises two limiting blocks g97 which are arranged at left and right intervals, the lower end of the vertical rod is positioned between the two limiting blocks, and the vertical rod can only horizontally move left and right between the two limiting blocks. When the vertical rod moves leftwards or rightwards and is extruded on the corresponding limiting block, any light rays irradiated rightwards from the third convex lens can be irradiated on the vertical plane at the left end of the lead-out optical fiber. The multi-path optical signal single-fiber transmission adapter also comprises a controller and a display. A displacement sensor g99 is fixedly arranged on the vertical rod. The control end of the horizontal cylinder, the displacement sensor and the display are respectively connected with the controller. The displacement sensor and the display can be matched to conveniently adjust the size of the incident light irradiation area of the fiber end. The multi-path optical signal single-fiber transmission adapter also comprises a voice prompt g105 connected with the controller. The voice prompter is convenient to use. The telescopic rod of the horizontal cylinder stretches to control the left and right movement of the third convex lens, so that the field adjustment is convenient, and the remote adjustment is also convenient. The remote adjustment of the incident light irradiation area of the fiber end can be realized by connecting a wireless module on the controller and connecting the wireless module with the light transmission monitoring platform.

Referring to fig. 30, the horizontal telescopic module includes a vertical rod and a horizontal slider g100 capable of moving horizontally, the upper end of the vertical rod is fixedly connected to the outer edge of the third convex lens, and one end of the horizontal slider is fixedly connected to the vertical rod. The horizontal sliding block can drive the third convex lens to move horizontally left and right. A horizontal chute g104 with a chute axis parallel to the horizontal straight line L is arranged on the lower pipe wall in the shading shell pipe, and a sliding port g103 communicated with the outer pipe wall of the shading shell pipe is arranged at the bottom of the horizontal chute. The horizontal sliding block horizontally moves left and right and is arranged in the horizontal sliding groove. The sliding port is movably provided with a bolt g102, the upper end of the bolt is connected to the lower surface of the horizontal sliding block, and the bolt positioned below the sliding port is spirally provided with a locking nut g101. The horizontal sliding block is convenient for adjusting the incident light irradiation area of the fiber end on site, and the reliability is good.

The design of the horizontal telescopic module increases the incident light irradiation area of the end face of the optical fiber input end, so that the end face of the optical fiber input end is not easy to burn by light, and the end face of the optical fiber input end has long service life and good reliability. The incidence point of each beam of light on the end face of the optical fiber input end can longitudinally move on the end face of the optical fiber input end, so that the light irradiation area on the end face of the optical fiber input end can be adjusted, the end face of the optical fiber input end is not easy to burn by light, the service life of the end face of the optical fiber input end is long, and the reliability is good.

Claims

1. The multi-path optical signal single-fiber transmission adapter is characterized by comprising a collimation light input round table, a first convex lens, a second convex lens, a third convex lens and an outgoing optical fiber which are sequentially arranged at intervals from left to right, wherein the central line of the collimation light input round table, the left focus and the right focus of the first convex lens, the left focus and the right focus of the second convex lens, the left focus and the right focus of the third convex lens and the axial lead of the outgoing optical fiber all fall on the same horizontal straight line L; a plurality of fiber inserting holes capable of radiating light rays to the first convex lens horizontally towards the right are formed in the collimating light input round table, and each light ray radiating to the first convex lens from each fiber inserting hole is parallel to a horizontal straight line L; the right focus of the first convex lens is overlapped with the left focus of the second convex lens; the right focus of the third convex lens is located on the axis of the lead-out optical fiber; the left end face of the lead-out optical fiber is a vertical plane, and the vertical plane of the left end of the lead-out optical fiber is perpendicular to a horizontal straight line L; any light ray emitted from each fiber inserting hole horizontally to the right sequentially passes through the first convex lens, the second convex lens and the third convex lens and irradiates on the vertical plane at the left end of the lead-out optical fiber; any included angle between the light irradiated from the third convex lens to the vertical plane at the left end of the lead-out optical fiber and the horizontal straight line L is smaller than a set angle; after any light irradiated on the vertical plane of the left end of the extraction optical fiber is refracted in the extraction optical fiber, the refracted light is continuously transmitted rightward in the extraction optical fiber; the left end of a shading shell tube is hermetically and rotatably connected to the outer edge of the right end of the collimating light input round table, and the right end of the shading shell tube is hermetically connected to the left end of the outgoing optical fiber, so that the right end face of the collimating light input round table, the first convex lens, the second convex lens, the third convex lens and the left end of the outgoing optical fiber are hermetically and shade-arranged in the shading shell tube; a driven gear ring is fixedly sleeved on the right side end of the collimation light input round table, and a driven gear is arranged on the outer ring of the driven ring; a first motor is fixedly arranged on the outer pipe wall of the shading shell pipe, a driving gear is arranged on a rotating shaft of the first motor, and the driving gear is meshed with the driven gear; the rotation of the rotating shaft of the motor I drives the driven gear ring to rotate, and the rotation of the driven gear ring drives the collimating light input round table to rotate.

2. The multi-path optical signal single fiber transmission adapter according to claim 1, wherein the motor number one is a stepper motor; the rotating shaft of the first motor uniformly rotates; when the rotating shaft of the motor I rotates, the rotating shaft firstly rotates clockwise by a Z-degree angle and then stops rotating for X minutes, and then rotates clockwise by the Z-degree angle and then stops rotating for X minutes; then stopping rotating for X minutes after rotating for Z degrees clockwise; then stopping rotating for X minutes after rotating Z degrees anticlockwise, and stopping rotating for X minutes after rotating Z degrees anticlockwise; stopping rotating for X minutes after rotating for Z degrees clockwise, and stopping rotating for X minutes after rotating for Z degrees clockwise; then rotating clockwise for Z degrees and stopping rotating for X minutes; the rotating shaft of the first motor circularly rotates in a reciprocating way; x is less than 60; z is less than 10.

3. The multiple optical signal single fiber transmission adapter according to claim 2, wherein the multiple optical signal single fiber transmission adapter further comprises a controller and a temperature sensor; the control end of the first motor and the temperature sensor are connected with the controller.

4. The optical signal multiplexing single-fiber transmission adapter according to claim 3, wherein the number of the temperature sensors is four, the first temperature sensor is arranged in a light shielding shell tube between the collimating light input round table and the first convex lens, the second temperature sensor is arranged in a light shielding shell tube between the first convex lens and the second convex lens, the third temperature sensor is arranged in a light shielding shell tube between the second convex lens and the third convex lens, and the fourth temperature sensor is arranged in a light shielding shell tube between the third convex lens and the lead-out optical fiber; among the four temperature sensors, the temperature detected by the temperature sensor with the highest temperature detected at present is the temperature Y adopted by the multi-path optical signal single-fiber transmission adapter exclusively, and the temperature multi-path optical signal single-fiber transmission adapters detected by other sensors are not adopted at present; the greater the temperature Y, the less time it takes to stop the rotation X.

5. The multiple optical signal single fiber transmission adapter according to claim 4, wherein the time for stopping rotation X at a temperature Y above 30 degrees celsius is less than 30 minutes; stopping rotating X at a temperature Y between 20 and 30 ℃ for 30 to 40 minutes; the time to stop rotating X at a temperature Y below 20 degrees celsius is greater than 40 minutes.