CN100351657C - Production method of small section flexible optical fibre bundle for transmitting image using acid soluble method - Google Patents
Production method of small section flexible optical fibre bundle for transmitting image using acid soluble method Download PDFInfo
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- CN100351657C CN100351657C CNB2005101123527A CN200510112352A CN100351657C CN 100351657 C CN100351657 C CN 100351657C CN B2005101123527 A CNB2005101123527 A CN B2005101123527A CN 200510112352 A CN200510112352 A CN 200510112352A CN 100351657 C CN100351657 C CN 100351657C
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Abstract
The present invention discloses a production method of flexible optical fiber bundles for transmitting images by using acid solution, which has the steps that core material glass, rubber material glass and acid soluble glass rod mateials are used as raw materials which are heated for melting simultaneously in a three-set crucible, and thus, three layers of coaxial single filaments are produced. The single filaments are reproduced into multifilaments after array, and the multifilaments are prodcued into flexible optical fiber bundles for transmitting images after acid solution. The flexible optical fiber bundles for transmitting images have 40 to 50% of section area of core materials, and thus, have excellently effective transmissivity.
Description
Technical field
The present invention relates to a kind of manufacture method of acid soluble method flexible optical fiber image transmitting beam, belong to flexible optical fiber image transmitting beam and make the field.
Background technology
Flexible optical fiber image transmitting beam generally has two kinds of production technologies.The one, row's silk method is about to the double-layer coaxial monofilament and twines in order, cuts off bunchy with the bonding back of organic adhesion agent then.The 2nd, sour molten method, this method are at first made three layers of coaxial monofilament, arrange bunchy then, and hot melt is drawn into multifilament, immerse at last to remove acid soluble glass in the acid solution to form the flexible optical fibre bundle.The manufacturing of three layers of coaxial monofilament also has two kinds of methods in the molten method of acid: first rod-in-tube technique, acid soluble glass, cladding and core material are made pipe and rod respectively, and be linked in then together, it is fine that hot melt becomes.This method cost height, efficient are low.It two is crucible methods, is exactly acid soluble glass, cladding and core material are directly made three layers of coaxial optical fiber in three special set crucibles, and advantage is resolution height, good product performance, production efficiency height.The patent of authorization publication number CN1420096, the two crucible system for drawing of porous that draw multicomponent glass optical fiber relate to a kind of two crucible system for drawing of porous that draw multicomponent glass optical fiber, this system is made up of charging device, melt device, temperature regulating device and row's winding apparatus, and the melt bottom of device is equipped with the monoblock type concentric double pipe discharging that is communicated with two isolated chambers crucible bodies respectively lets slip a remark; Settled the core material fritting device and the cladding fritting device that constitute with melt device same metal material in the charging device, its upper end of fritting device is a charging aperture, and the lower end is the liquid outlet that stretches into the melt device; Be fixed with step-like exhaust bubble structure in the crucible body or in the fritting device.Because glass is fusing in advance before entering the crucible body, thereby reduce the fluctuation of glass liquid level and temperature in two crucibles, guaranteed the homogeneity in optical fiber footpath; And the discharging of monoblock type concentric double pipe is let slip a remark and step-like exhaust bubble structure, makes that then the optical fiber skin thickness that draws is even, transmitance is high.But the monofilament of double crucible method manufacturing can only the row of employing silk manufactured coherent fiber bundle, exist the wire broken rate height, shortcoming such as resolution is low.
CN1103325 acid dissolving optical fiber facsimile beam single fiber acid dissolving glass adherence method adopts the method for acid soluble glass silk along circumferential arrangement at the difficulty that exists infiltration phenomenon and the control of rod in tube method acid soluble glass to be equipped with between existing three crucible method triplex glasses.But this method itself is still the expansion of rod in tube method notion, can not change the low root problem of rod in tube method production efficiency.
The manufacturing process that Te Kaiping JP8-262242 pliability fibre bundle has been invented a kind of acid soluble method flexible optical fiber image transmitting beam.But the ratio that the spy opens flat JP8-262242 pliability fibre bundle core material diameter a and fibre diameter c is 0.48＜(a/c)＜0.57, and the net sectional area that is converted to core material is 23.0～32.5%, makes that the effective transmissivity of fibre bundle is low.
Summary of the invention
For solving the problem that prior art exists, the present invention proposes the method for the molten manufactured flexible optical fiber image transmitting beam of a kind of acid, the ratio of core material sectional area can be brought up to 40～50%, improves the effective transmissivity of optical fiber image transmission beam.
The present invention is achieved by the following technical solutions:
The method of the molten manufactured flexible optical fiber image transmitting beam of a kind of acid is characterized in that described method comprises the steps:
(1) preparation of raw material glass bar:
Make the glass batch of core material, cladding and sour molten material according to composition requirement, the fusing clarification in platinum crucible respectively of core material glass, cladding glass and acid soluble glass, the bar of three kinds of glass is made or is drawn in casting, the diameter of three kinds of bars is respectively: core material glass 25～30mm, cladding glass bar 20～25mm, sour molten material glass bar 15～20mm; 15～20mm;
(2) coaxial three layers of monofilament manufacturing: core material glass, cladding glass and acid soluble glass bar are joined while heat fused in one three set crucible, three set crucibles are placed in the electric furnace, the temperature of electric furnace divides upper, middle and lower three Region control, should trizonal temperature be controlled at 1250～1300 ℃, 950～1000 ℃ and 800～850 ℃ respectively, oral area at three set crucibles is drawn into three layers of coaxial monofilament, the diameter that makes monofilament is 0.3～0.4mm, the parameter of monofilament is set to a/b=0.69～0.75, a/c=0.60～0.68;
Wherein, a is the core material radius, and b is core material radius and cladding thickness sum, and c is the radius of three layers of coaxial monofilament; The best of monofilament parameter is set to a/b=0.70～0.75, a/c=0.65～0.68;
(3) row's silk:
According to the requirement of coherent fiber bundle pixel total amount, be arranged in the tow that contains certain monofilament quantity with three layers of coaxial monofilament;
(4) multifilament manufacturing:
The tow of step (3) is heated to 850～900 ℃, is drawn into the rigidity multifilament, the diameter of multifilament is 0.6～2.0mm;
(5) acid is molten:
The multifilament two ends are adopted and are sealed with wax, in order to avoid be subjected to the erosion of acid solution, multifilament are immersed in the acid solution, and acid soluble glass (not comprising the two ends of sealing with wax) dissolves under the effect of acid solution, and monofilament separates, and coherent fiber bundle is transformed into flexibility from rigidity, promptly forms flexible optical fiber image transmitting beam.
Core material is used to transmit light, and after having selected a kind of glass, the core material area is big more, and it is big more effectively to pass light area, and transmitance is high more.But when a/b＞0.75, or a/c＞0.68 o'clock, the core material area is excessive, and the function of cladding or sour molten material just is difficult to performance.When a/b＜0.69, or a/c＜0.60 o'clock, the core material area is too small, effective light transmission area deficiency, and transmitance can descend.The effect of cladding is to make light carry out total reflection in the communication process in core material, and when a/b＜0.69, the cladding layer is too thick, and the core material relative scale is descended, and has reduced the effective light transmission area of coherent fiber bundle.When a/b＞0.75, the cladding layer is too thin, can not form total reflection, produces light leakage phenomena, and coherent fiber bundle just can't be worked.The molten material of acid is a kind of excessive medium, just is retained in two of coherent fiber bundle in final products, and monofilament is bonded together, and center section is all dissolved in the molten process of acid, and monofilament is separated, and coherent fiber bundle is transformed into flexibility from rigidity.When a/c＜0.60, the molten layer of acid is too thick, has not only prolonged the sour molten time, and the relative scale of core material and cladding is descended, and effective biography light area of coherent fiber bundle reduces, and transmitance descends thereupon.When a/c＞0.68, the molten layer of acid is too thin, and monofilament is difficult to separate fully in the molten process of acid, and the bending property of coherent fiber bundle is poor, is very easy to produce fracture of wire.
Beneficial effect
This flexible optical fiber image transmitting beam diameter is 0.6～2.0mm; Have the core material sectional area more than 40～50%, it is big therefore effectively to pass light area, the transmitance height.Adopt the step of above (1)～(5) practical, can produce the flexible optical fiber image transmitting beam that adheres to specification.
Description of drawings
Fig. 1 is a filament construction cross sectional representation of the present invention, and wherein, a is the core material radius, and b is core material radius and cladding thickness sum, and c is the radius of three layers of coaxial monofilament.
Fig. 2 is a filament construction synoptic diagram of the present invention, wherein, and d: core material, e: cladding, f: sour molten material.
Fig. 3 arranges the tow synoptic diagram that forms for of the present invention by monofilament, and wherein, d: core material, e: cladding, f: sour molten material, g: monofilament is arranged the space that forms.
Fig. 4 is a multifilament synoptic diagram of the present invention, wherein, and d: core material, e: cladding, f: sour molten material.
Fig. 5 is a flexible optical fiber image transmitting beam synoptic diagram of the present invention, wherein, and h: hard end face, i: central bendable portion.
Below the present invention is further elaborated by specific embodiment, but the cited case does not limit protection scope of the present invention.
Embodiment 1
(1) preparation of raw material glass bar: make the glass batch of core material, cladding and sour molten material according to composition requirement, fusing clarification in platinum crucible is drawn into the bar of glass.The diameter of core material glass bar is 30mm, and the diameter of cladding glass bar is 28mm, and the diameter of sour molten material glass bar is 18mm;
(2) coaxial three layers of monofilament manufacturing: core material glass, cladding glass and acid soluble glass bar are joined while heat fused in one three set crucible, three set crucibles are placed in the electric furnace, the temperature of electric furnace divides upper, middle and lower three Region control, should trizonal temperature be controlled at 1280 ℃, 960 ℃ and 820 ℃ respectively, the oral area that just can draw out from crucible then at three set crucibles is drawn into three layers of coaxial monofilament; Oral area at three set crucibles draws out three layers of coaxial monofilament then, and the diameter of monofilament is 0.4mm, and the structure of monofilament is as shown in table 1:
Table 1:
| Micron | |
| Filament diameter | 400 |
| Core material diameter (2a) | 260 |
| The diameter of core material and cladding and (2b) | 371 |
| The diameter of core material, cladding and sour molten material and (2c) | 400 |
| a/b | 0.70 |
| a/c | 0.65 |
(3) row's silk: get 10000 monofilament and arrange back formation filament tow;
(4) multifilament manufacturing: the multifilament that is drawn into 0.7mm tow is heated to 860 ℃ in an electric furnace after;
(5) acid is molten: the multifilament two ends are adopted and are sealed with wax, and immerse then in the acid solution body, take out after a period of time, and the rinsing acid solution again with the glue pipe socket envelope, has just been made the flexible optical fiber image transmitting beam with 10000 pixels after the drying.
Embodiment 2
(1) preparation of raw material glass bar: make the glass batch of core material, cladding and sour molten material according to composition requirement, fusing clarification in platinum crucible is drawn into the bar of glass.The diameter of core material glass bar is 30mm, and the diameter of cladding glass bar is 28mm, and the diameter of sour molten material glass bar is 18mm;
(2) coaxial three layers of monofilament manufacturing: core material glass, cladding glass and acid soluble glass bar are joined while heat fused in one three set crucible, three set crucibles are placed in the electric furnace, the temperature of electric furnace divides upper, middle and lower three Region control, should trizonal temperature be controlled at 1280 ℃, 960 ℃ and 800 ℃ respectively, just can from crucible, draw out three layers of coaxial monofilament, the diameter of monofilament is 0.3mm, and the structure of monofilament is as shown in table 2:
Table 2:
| Micron | |
| Filament diameter | 300 |
| Core material diameter (2a) | 195 |
| The diameter of core material and cladding and (2b) | 278 |
| The diameter of core material, cladding and sour molten material and (2c) | 300 |
| a/b | 0.70 |
| a/c | 0.65 |
(3) row's silk: get 22000 monofilament and arrange back formation filament tow;
(4) multifilament manufacturing: the multifilament that is drawn into 1.1mm tow is heated to 860 ℃ in electric furnace after;
(5) acid is molten: the multifilament two ends are adopted and are sealed with wax, and immerse then in the acid solution body, take out after a period of time, and the rinsing acid solution again with the glue pipe socket envelope, is made the flexible optical fiber image transmitting beam with 22000 pixels after the drying.
Claims (2)
1, the method for the molten manufactured flexible optical fiber image transmitting beam of a kind of acid is characterized in that, described method comprises the steps:
(1) preparation of raw material glass bar:
Make the glass batch of core material, cladding and sour molten material according to composition requirement, the fusing clarification in platinum crucible respectively of core material glass, cladding glass and acid soluble glass, the bar of three kinds of glass is made or is drawn in casting, wherein, the diameter of three kinds of bars is respectively: core material glass 25～30mm, cladding glass bar 20～25mm, sour molten material glass bar 15～20mm;
(2) coaxial three layers of monofilament manufacturing: core material glass, cladding glass and acid soluble glass bar are joined while heat fused in one three set crucible, three set crucibles are placed in the electric furnace, the temperature of electric furnace divides upper, middle and lower three Region control, should trizonal temperature be controlled at 1250～1300 ℃, 950～1000 ℃ and 800～850 ℃ respectively, oral area at three set crucibles is drawn into three layers of coaxial monofilament, the diameter that makes monofilament is 0.3～0.4mm, the parameter of monofilament is set to a/b=0.69～0.75, a/c=0.60～0.68;
Wherein, a is the core material radius, and b is core material radius and cladding thickness sum, and c is the radius of three layers of coaxial monofilament;
(3) row's silk:
According to the requirement of coherent fiber bundle pixel total amount, be arranged in the tow that contains certain monofilament quantity with three layers of coaxial monofilament;
(4) multifilament manufacturing:
The tow of step (3) is heated to 850～900 ℃, is drawn into the rigidity multifilament;
(5) acid is molten:
The multifilament two ends are adopted and are sealed with wax, and multifilament is immersed in the acid solution, and acid soluble glass dissolves under the effect of acid solution, and monofilament separates, and coherent fiber bundle is transformed into flexibility from rigidity, promptly forms flexible optical fiber image transmitting beam.
2, the method for the molten manufactured flexible optical fiber image transmitting beam of acid as claimed in claim 1 is characterized in that, in the step of described method (2), the monofilament parameter is set to a/b=0.70～0.75, a/c=0.65～0.68.
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