Production device for loose body of optical fiber preform

Abstract

The invention provides a production device for a loose body of an optical fiber preform, and relates to the technical field of production of optical fiber preforms. A cavity is formed in the vertical cylinder, the clamping assembly is used for fixing the optical fiber preform loose body, and the optical fiber preform loose body rotates along with the clamping assembly under the driving of the driving part. The ion injection part is controlled to vertically reciprocate along the screw rod assembly so as to purge adsorbates on the loose body of the optical fiber preform in the rotating process of the loose body of the optical fiber preform. Light emitted by the light source sequentially passes through the polarizer, the tail handle of the optical fiber preform loose body and the polarized light modulation assembly, and colored light is formed at the tail end of the polarized light modulation assembly so as to perform stress detection. According to the technical scheme, automatic purging and stress inspection of the loose body of the optical fiber preform are synchronously carried out, so that the labor intensity and the operation risk of operators are reduced, the loss of the loose body of the optical fiber preform caused by the quality problem is reduced, and the production quality and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of production of optical fiber preform loose bodies, and particularly relates to a production device of optical fiber preform loose bodies. BACKGROUND

[0002] The optical fiber preform loose body is a porous intermediate body prepared by an external vapor deposition (OVD) process, and forms a dense glass body after dehydration sintering, and is a key precursor for producing communication optical fibers. Due to the special structure and texture of the optical fiber preform loose body, the surface of the optical fiber preform loose body needs to be destaticized and the adsorbed matter needs to be blown off before entering the sintering furnace, and the tail handle stress of the optical fiber preform loose body needs to be checked, because the tail handle of the optical fiber preform loose body is a load-bearing connecting part suspended in the sintering furnace, and if there is stress concentration in the tail handle, it is easy to break from the tail handle during high-temperature sintering and cause a furnace breaking accident.

[0003] However, in the existing process, on the one hand, the blowing operation depends on manual operation of an ion gun, and the shooting distance and trajectory lack quantitative control standards, which easily leads to surface damage of the optical fiber preform loose body or residual adsorbed matter; on the other hand, the stress detection depends on manual climbing and manual holding of a simple stress observation instrument composed of a light source, polarizing glass and a visible stress glass to visually interpret, and there is a risk of high-altitude operation safety and accidental touching of the surface of the optical fiber preform loose body. SUMMARY

[0004] An object of the present application is to provide a production device of optical fiber preform loose bodies, which solves the technical problem that static cleaning and stress checking are not easy in the prior art.

[0005] Another object of the present application is to automatically remove the adsorbed matter blown off from the optical fiber preform loose body in the vertical cylinder.

[0006] In particular, the present application provides a production device of optical fiber preform loose bodies, comprising: a vertical cylinder arranged in a vertical direction and having an internal cavity; a rotating mechanism comprising a driving member and a clamping assembly for fixing the optical fiber preform loose body, the clamping assembly rotating under the driving of the driving member, thereby driving the optical fiber preform loose body to rotate; a cleaning mechanism comprising a lead screw assembly and an ion jet member, the lead screw assembly being arranged in a vertical direction at the inner side of the vertical cylinder, the ion jet member being slidably mounted on the lead screw assembly and being controlled to reciprocate in a vertical direction along the lead screw assembly, and the ion jet member being controlled to be turned on to blow off the adsorbed matter on the optical fiber preform loose body in the process of rotating the optical fiber preform loose body; The stress detection module includes a light source, a polarizer, and a polarization modulation assembly. The polarizer and the polarization modulation assembly are located on opposite sides of the tail shank of the loose fiber preform. The tail end of the polarization modulation assembly is located outside the vertical cylinder. The light emitted by the light source passes sequentially through the polarizer, the tail shank, and the polarization modulation assembly, forming colored light at the tail end of the polarization modulation assembly, so as to detect the stress of the tail shank of the loose fiber preform based on the colored light.

[0007] Optionally, the polarization modulation component includes: A reflective component is located outside the vertical cylinder and has a first end and a second end. The first end is directly opposite the tail shank of the loose fiber preform, and the colored light is formed at the second end. A color polarizer, located within the cavity and horizontally spaced from the first end of the reflective assembly, is used to convert polarized light passing through the tailstock into visible colored light.

[0008] Optionally, the polarization modulation component further includes: Two light-shielding plates are arranged vertically between the reflective component and the color-forming polarizer, and are respectively connected to the color-forming polarizer and the reflective component to limit the colored light.

[0009] Optionally, the reflective assembly includes a first plane mirror and a second plane mirror arranged sequentially from top to bottom. The first ends of the first plane mirror and the second plane mirror are respectively connected to the corresponding light-shielding plates and are used to jointly reflect the colored light defined by the light-shielding plates, so that the colored light is formed at the second ends of the second plane mirror and the first plane mirror.

[0010] Optionally, the drive member is connected to the top of the lead screw assembly and is configured to controllably drive the ion ejector to move along the lead screw assembly while simultaneously driving the clamping assembly to rotate the fiber preform loose body.

[0011] Optionally, the lead screw assembly includes a slider, on which the ion jetting element is connected, and the cleaning mechanism further includes: A limit switch is located at the bottom of the lead screw assembly. After contacting the slider, it causes the slider to move in the opposite direction, thereby causing the ion jetting component to reciprocate vertically following the slider.

[0012] Optionally, the cleaning mechanism further includes: An extension member is disposed on the slider along the horizontal direction and connected to the ion ejector to adjust the spacing between the ion ejector and the loose body of the optical fiber preform.

[0013] Optionally, the rotating mechanism further includes: The transmission assembly includes a synchronous belt, a driving wheel, and a driven wheel. The driving wheel is rotatably connected to the driving member and is spaced apart from the driven wheel along the horizontal direction. The driven wheel is sleeved on the outer periphery of the clamping assembly. The synchronous belt is sleeved on the outer periphery of the driving wheel and the driven wheel, so that the driving wheel and the driven wheel rotate synchronously, thereby causing the loose body of the optical fiber preform to rotate.

[0014] Optionally, the transmission assembly further includes: The tensioning pulley abuts against the inner side of the timing belt to provide radial clamping force to the timing belt.

[0015] Optionally, the vertical cylinder is in communication with the external environment, and the production apparatus further includes: The first air passage is connected to the bottom of the vertical cylinder; The second air duct is connected to both the top of the vertical cylinder and the first air duct, and is also connected to the vacuum system. The second air duct and the first air duct are used together to remove the adsorbent blown off the loose body of the optical fiber preform inside the vertical cylinder.

[0016] In this invention, the internal cavity of the vertical cylinder has a rotating mechanism including a driving component and a clamping assembly. The clamping assembly is used to fix the loose fiber preform. The driving component is configured to controllably drive the clamping assembly to rotate, thereby causing the loose fiber preform to rotate with the clamping assembly. The cleaning mechanism includes a lead screw assembly and an ion ejector. The ion ejector is controlled to reciprocate vertically along the lead screw assembly. The ion ejector is configured to be controlled to open, so as to blow away adsorbed material on the loose fiber preform during its rotation. The stress detection module includes a light source, a polarizer, and a polarization modulation assembly. The light emitted by the light source passes sequentially through the polarizer, the tailstock, and the polarization modulation assembly, forming colored light at the tail end of the polarization modulation assembly, so as to detect the stress of the tailstock of the loose fiber preform based on the colored light. The above technical solution uses a driving component to drive the clamping assembly, causing the loose fiber preform to rotate. Simultaneously, an ion-ejecting component reciprocates vertically along the lead screw assembly, thus purifying the loose fiber preform during rotation. Additionally, colored light is generated at the tail end of the polarization modulation assembly for detection. This device achieves simultaneous automatic purging and stress inspection of the loose fiber preform, reducing the labor intensity and operational risks for operators in current production processes, and minimizing losses due to quality issues, thereby improving production quality and efficiency.

[0017] Furthermore, in this invention, the vertical cylinder is connected to the external environment, the first air duct is connected to the bottom of the vertical cylinder, and the second air duct is connected to both the top of the vertical cylinder and the first air duct, and is also connected to a vacuum system. The second air duct and the first air duct are used together to suck away the adsorbent blown off the loose body of the optical fiber preform inside the vertical cylinder. The above technical solution, by connecting the vacuum system to both the first and second air ducts, creates a negative pressure airflow inside the vertical cylinder, thereby automatically sucking away the adsorbent blown off the loose body of the optical fiber preform, completing the cleaning without manual intervention.

[0018] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic structural diagram of a production apparatus provided according to an embodiment of the present invention.

[0020] Figure label: 100-Production device for loose fiber preforms, 200-Loose fiber preforms, 1-Vertical cylinder, 2-Rotating mechanism, 21-Driver, 22-Clamping assembly, 23-Transmission assembly, 231-Synchronous belt, 232-Driving wheel, 233-Driven wheel, 234-Tensioning wheel, 3-Cleaning mechanism, 31-Screw assembly, 32-Ion ejector, 33-Slider, 34-Limit switch, 35-Extension component, 4-Stress checking module, 41-Light source, 42-Polarizer, 43-Polarization modulation assembly, 431-Reflection assembly, 432-Color polarizer, 433-Shielding plate, 434-First plane mirror, 435-Second plane mirror, 5-First air duct, 6-Second air duct, 7-Support plate. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0024] Unless otherwise expressly specified and limited, the terms "connection," "installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] Figure 1 This is a schematic structural diagram of a production apparatus provided according to an embodiment of the present invention.

[0027] like Figure 1 As shown, in a specific embodiment, a production apparatus 100 for a loose fiber preform includes a vertical cylinder 1, a rotating mechanism 2, a cleaning mechanism 3, and a stress checking module 4. The vertical cylinder 1 is arranged vertically and has an internal cavity. The rotating mechanism 2 includes a driving member 21 and a clamping assembly 22. The clamping assembly 22 is used to fix the loose fiber preform 200. Under the drive of the driving member 21, the clamping assembly 22 rotates, thereby driving the loose fiber preform 200 to rotate. The cleaning mechanism 3 includes a lead screw assembly 31 and an ion ejector 32. The lead screw assembly 31 is arranged vertically inside the vertical cylinder 1. The ion ejector 32 is slidably mounted on the lead screw assembly 31 and moves reciprocally vertically along the lead screw assembly 31 in a controlled manner. The ion ejector 32 is configured to be opened in a controlled manner to blow away adsorbed material on the loose fiber preform 200 during the rotation of the loose fiber preform 200. The stress inspection module 4 includes a light source 41, a polarizer 42, and a polarization modulation component 43. The polarizer 42 and the polarization modulation component 43 are located on opposite sides of the tailstock of the fiber preform loose body 200. The tail end of the polarization modulation component 43 is located outside the vertical cylinder 1. The light emitted by the light source 41 passes sequentially through the polarizer 42, the tailstock, and the polarization modulation component 43, forming colored light at the tail end of the polarization modulation component 43. The stress of the tailstock of the fiber preform loose body 200 is detected based on the colored light. Specifically, the ion jetting component 32 removes static electricity and blows away adsorbed substances from the surface of the fiber preform loose body 200 to prevent the re-adhesion of micro-dust particles due to electrostatic adsorption. At the same time, it removes adsorbed impurity particles. In addition, the colored light can be visually interpreted by the operator or automatically identified by the detection mechanism to determine whether the stress state of the tailstock of the fiber preform loose body 200 meets the sintering process requirements.

[0028] In this embodiment, the driving component 21 drives the clamping assembly 22 to rotate the fiber preform loose body 200. Simultaneously, the ion ejector 32 reciprocates vertically along the lead screw assembly 31, thereby purifying the fiber preform loose body 200 during rotation. Additionally, a stress inspection module 4 is provided to generate colored light at the tail end of the polarization modulation assembly 43 for detection based on the colored light. This device achieves simultaneous automatic purging and stress inspection of the fiber preform loose body 200, reducing the labor intensity and operational risks for operators in current production operations, and minimizing losses due to quality issues, thereby improving production quality and efficiency.

[0029] In some embodiments, the polarization modulation assembly 43 includes a reflective assembly 431 and a color-forming polarizer 432. The reflective assembly 431 is located outside the vertical cylinder 1 and has a first end and a second end. The first end faces the tailstock of the fiber preform loose body 200, and colored light is formed at the second end. The color-forming polarizer 432 is located inside the cavity and is arranged horizontally at a distance from the first end of the reflective assembly 431 to convert the polarized light passing through the tailstock into visible colored light. Specifically, the light emitted by the light source 41 in a controlled manner passes through the polarizer 42 to form polarized light. When the polarized light passes through the tailstock, which is made of quartz material, due to the different internal stress structures of the tailstock, the polarized light undergoes different refractions and, after passing through the color-forming polarizer 432, presents colored light corresponding to the stress magnitude. Then, the colored light is reflected by the reflective assembly 431 to a height range level with the eyes of the detection mechanism or operator, wherein the height of the second end of the reflective assembly 431 is within this height range. For example, if the colored light is dark black or grayish white, it indicates that the tail of the fiber preform loose body 200 contains only minor stress, and the fiber preform loose body 200 is deemed a qualified product and allowed to proceed directly to the next process; if the colored light is light yellow to orange-red, it indicates that the tail of the fiber preform loose body 200 has moderate stress accumulation, and the fiber preform loose body 200 is deemed a warning product and may proceed to the next process depending on the situation; if the colored light is indigo blue, emerald green, or dense ring-shaped colored stripes, it indicates that the tail of the fiber preform loose body 200 has high-order stress concentration, and the fiber preform loose body 200 is deemed a defective product and is not allowed to proceed directly to the next process.

[0030] In some embodiments, the polarization modulation assembly 43 further includes two light-shielding plates 433, which are vertically spaced between the reflective assembly 431 and the color-developing polarizer 432, and are respectively connected to the color-developing polarizer 432 and the reflective assembly 431 to limit the colored light. Specifically, the vertically arranged light-shielding plates 433 can effectively block other stray light from entering the detection optical path from the side inside the vertical cylinder 1, so that the colored light is concentrated and guided to the reflective assembly 431, reducing the divergence loss of the colored light during transmission and improving the accuracy of stress detection and judgment.

[0031] In some embodiments, the reflective assembly 431 includes a first plane mirror 434 and a second plane mirror 435 arranged sequentially from top to bottom. The first ends of the first plane mirror 434 and the second plane mirror 435 are respectively connected to corresponding light-shielding plates 433 and are used to jointly reflect the colored light defined by the light-shielding plates 433, so that the colored light is formed at the second ends of the second plane mirror 435 and the first plane mirror 434. In this embodiment, the first plane mirror 434 and the second plane mirror 435 together form a periscope, and using the principle of specular reflection, they jointly guide and transmit the colored light defined by the light-shielding plates 433, efficiently reflecting and exporting the colored light originally located inside the vertical cylinder 1, and finally forming it at the second ends of the first plane mirror 434 and the second plane mirror 435, realizing the effective extension and transfer of the colored light from inside the vertical cylinder 1 to the external detection position.

[0032] In some embodiments, the drive member 21 is connected to the top of the lead screw assembly 31 and is configured to controllably drive the ion ejector 32 to move along the lead screw assembly 31, while simultaneously driving the clamping assembly 22 to rotate the optical fiber preform. Specifically, a dual-drive effect is achieved through a single drive member 21, simultaneously realizing the circumferential rotation of the optical fiber preform loose body 200 and the vertical reciprocating movement of the ion ejector 32. This allows the clean airflow ejected by the ion ejector 32 to form a spiral continuous scanning trajectory on the surface of the optical fiber preform loose body 200, thereby achieving all-round, dead-angle-free uniform sweeping of the outer surface of the optical fiber preform loose body 200, and also effectively simplifying the drive structure of the production device 100.

[0033] In some embodiments, the lead screw assembly 31 includes a slider 33, on which an ion ejector 32 is connected. The cleaning mechanism 3 includes a limit switch 34, which is located at the bottom of the lead screw assembly 31. After contacting the slider 33, the limit switch 34 causes the slider 33 to move in the opposite direction, thereby causing the ion ejector 32 to follow the slider 33 in a vertical reciprocating motion. Specifically, the limit switch 34 serves as a stroke control and reversing element. When the slider 33 moves vertically downward and contacts the limit switch 34, it causes the ion ejector 32 on the slider 33 to move vertically upward. Through this combination of mechanical contact and automatic reversing, the movement stroke of the slider 33 is limited, and the automatic reciprocating motion of the ion ejector 32 in the vertical cylinder 1 is realized, ensuring that the ion ejector 32 can repeatedly and comprehensively scan and purge the loose fiber preform 200.

[0034] In some embodiments, the cleaning mechanism 3 includes a telescopic member 35, which is horizontally disposed on the slider 33 and connected to the ion ejector 32 to adjust the distance between the ion ejector 32 and the fiber preform loose body 200. Specifically, the telescopic member 35 can be, for example, a cylinder, an electric push rod, a distance adjustment slide rail, or a telescopic arm. By adjusting the distance between the ion ejector 32 and the fiber preform loose body 200 through the telescopic member 35, the optimal blowing distance can be obtained for each specification of fiber preform loose body 200, thereby ensuring the consistency of cleaning airflow intensity and cleaning effect. At the same time, the ion ejector 32 can be retracted in the non-working state to avoid interference or collision during loading and unloading.

[0035] In some embodiments, the rotating mechanism 2 further includes a transmission assembly 23, which includes a synchronous belt 231, a driving wheel 232, and a driven wheel 233. The driving wheel 232 is rotatably connected to the driving member 21 and is arranged horizontally spaced from the driven wheel 233. The driven wheel 233 is sleeved on the outer periphery of the clamping assembly 22, and the synchronous belt 231 is sleeved on the outer periphery of the driving wheel 232 and the driven wheel 233, so that the driving wheel 232 and the driven wheel 233 rotate synchronously, thereby causing the fiber preform loose body 200 to rotate. Specifically, the rotating mechanism 2 adopts a belt drive structure to achieve flexible power transmission and speed matching. When the rotating mechanism 2 is working, the driving member 21 drives the driving wheel 232 to rotate, and the synchronous belt 231 accurately and synchronously transmits the rotational motion of the driving wheel 232 to the driven wheel 233, thereby driving the clamping assembly 22 fixed to the driven wheel 233 to rotate, and finally realizing the rotation of the fiber preform loose body 200.

[0036] In some embodiments, the transmission assembly 23 further includes a tensioning wheel 234, which abuts against the inner side of the synchronous belt 231 to provide radial clamping force to the synchronous belt 231. In this embodiment, by applying a continuous radial clamping force to the synchronous belt 231, the tensioning wheel 234 can effectively adjust and maintain the synchronous belt 231 in a suitable tension state, preventing slippage, tooth skipping, or detachment due to slackness of the synchronous belt 231 during transmission, ensuring the accuracy and continuity of power transmission, thereby guaranteeing the stability and reliability of the optical fiber preform loose body 200 during rotation.

[0037] In some embodiments, the vertical cylinder 1 is connected to the external environment. The production apparatus 100 further includes a first air duct 5 and a second air duct 6. The first air duct 5 is connected to the bottom of the vertical cylinder 1, and the second air duct 6 is connected to both the top of the vertical cylinder 1 and the first air duct 5, and is connected to a vacuum system. The second air duct 6 and the first air duct 5 are used together to suck away the adsorbent blown off from the optical fiber preform inside the vertical cylinder 1. Specifically, the first air duct 5 and the second air duct 6 are located outside the vertical cylinder 1. By utilizing the synergistic suction effect of the first air duct 5 and the second air duct 6, light dust floating on the top of the vertical cylinder 1 and heavy particles settling at the bottom can be captured simultaneously. The adsorbent blown off from the loose body 200 of the optical fiber preform is efficiently and quickly discharged from the vertical cylinder 1, effectively preventing the adsorbent from accumulating in dead corners or causing secondary pollution, and significantly improving cleaning efficiency.

[0038] In a preferred embodiment, the production device 100 further includes a support plate 7, which is installed horizontally on the inner wall of the vertical cylinder 1, and a light source 41 and a polarizer 42 are connected to its bottom. The transmission assembly 23 and the drive component 21 are located above the support plate 7. The clamping assembly 22 passes through the support plate 7, and one end is rotatably connected to the driven wheel 233, while the other end is used to install the fiber optic preform loose body 200, thereby improving the reliability of the operation of the production device 100.

[0039] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A production apparatus for porous optical fiber preforms, characterized in that, The application relates to a production device for optical fiber preform loose bodies, which comprises a vertical cylinder, a rotating mechanism, a cleaning mechanism and a stress checking module. The rotating mechanism comprises a driving member and a clamping assembly for fixing the optical fiber preform loose body, and under the driving of the driving member, the clamping assembly rotates to drive the optical fiber preform loose body to rotate. The cleaning mechanism comprises a screw rod assembly and an ion spraying member, the screw rod assembly is vertically arranged at the inner side of the vertical cylinder, the ion spraying member is slidably arranged on the screw rod assembly and is controlled to vertically reciprocate along the screw rod assembly, and the ion spraying member is arranged to be controlled to be opened to blow the adsorbed matters on the optical fiber preform loose body during the rotation of the optical fiber preform loose body. The stress checking module comprises a light source, a polarizer and a polarized light modulation assembly, the polarizer and the polarized light modulation assembly are respectively arranged at the opposite sides of the tail handle of the optical fiber preform loose body, the tail end of the polarized light modulation assembly is arranged at the outer side of the vertical cylinder, the light emitted by the light source passes through the polarizer, the tail handle and the polarized light modulation assembly in sequence, and the light with color is formed at the tail end of the polarized light modulation assembly, so that the stress of the tail handle of the optical fiber preform loose body is detected according to the light with color. The polarized light modulation assembly comprises a reflecting assembly and a color developing polarizer.

2. The production apparatus according to claim 1, characterized by The reflecting assembly is arranged at the outer side of the vertical cylinder and has a first end and a second end, the first end is opposite to the tail handle of the optical fiber preform loose body, and the light with color is formed at the second end. The color developing polarizer is arranged in the cavity and is horizontally spaced from the first end of the reflecting assembly, and is used for converting the polarized light passing through the tail handle into visual light with color. The polarized light modulation assembly further comprises two light shielding plates which are vertically spaced between the reflecting assembly and the color developing polarizer and are connected with the color developing polarizer and the reflecting assembly respectively to define the light with color.

3. The production apparatus according to claim 2, characterized by The reflecting assembly comprises a first plane mirror and a second plane mirror which are arranged from top to bottom, the first end of the first plane mirror and the second plane mirror is connected with the corresponding light shielding plate, and is used for jointly reflecting the light with color defined by the light shielding plate, so that the light with color is formed at the second end of the second plane mirror and the first plane mirror.

5. The production device according to any one of claims 2-4, wherein the driving member is connected with the top of the screw rod assembly and is arranged to control the ion spraying member to move along the screw rod assembly and drive the clamping assembly to rotate the optical fiber preform loose body.

4. The production apparatus according to claim 3, characterized by The screw rod assembly comprises a sliding block, the ion spraying member is connected with the sliding block, and the cleaning mechanism further comprises a limit switch which is arranged at the bottom of the screw rod assembly and is in contact with the sliding block to reversely move the sliding block, so that the ion spraying member reciprocates vertically along with the sliding block. The cleaning mechanism comprises ​ 6. The production apparatus according to claim 5, characterized by ​ ​ 7. The production apparatus according to claim 6, characterized by ​ A telescopic member is arranged on the slider in the horizontal direction and connected with the ion ejection member to adjust the distance between the ion ejection member and the optical fiber preform loose body.

8. The production apparatus according to claim 7, characterized by The rotating mechanism further comprises: A transmission assembly comprising a synchronous belt, a driving wheel and a driven wheel, the driving wheel is rotationally connected with the driving member and is arranged in the horizontal direction with the driven wheel, the driven wheel is sleeved on the outer periphery of the clamping assembly, and the synchronous belt is sleeved on the outer periphery of the driving wheel and the driven wheel to synchronize the rotation of the driving wheel and the driven wheel, thereby rotating the optical fiber preform loose body.

9. The production apparatus according to claim 8, characterized by The transmission assembly further comprises: A tensioning wheel abutting against the inner side of the synchronous belt to provide radial compression force to the synchronous belt.

10. The production apparatus according to any one of claims 6 to 9, characterized by, The vertical cylinder is in communication with the external environment, and the production device further comprises: A first air duct in communication with the bottom of the vertical cylinder; A second air duct in communication with the top of the vertical cylinder and the first air duct, and connected with a vacuum pumping system, the second air duct and the first air duct are used to jointly suck away the adsorbent blown off from the optical fiber preform loose body in the vertical cylinder.

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