JPS6157907A - Method for arranging strands for image guide - Google Patents

Abstract

PURPOSE:To obtain an image guide almost free from defects in quality by densely arranging plural quartz fiber strands for an image guide in a quartz pipe filled with a liq. consisting of carbon and fluorine atoms. CONSTITUTION:Quartz fiber strands each consisting of a pure quartz core and a quartz clad contg. boron or fluorine as a dopant are densely arranged in a quartz pipe. At this time, the quartz pipe is filled with a liq. consisting of carbon and fluorine atoms, and ultrasonic vibration is applied. The resulting quartz pipe contg. the arranged quartz fiber strans is vacuum-dried, drawn by means of a drawer, and coated with an ultraviolet-curing material contg. an epoxy acrylate oligomer as the principal component to obtain an image guide.

Description

DETAILED DESCRIPTION OF THE INVENTION [Background (1) and (1) of the invention] The present invention relates to an image guide strand arrangement method.

Quartz-based image guides are usually manufactured by cleaning the surface of the image guide sebaceous glands that form pixels, i.e., quartz fiber wires, with an organic solvent, hydrochloric acid, water, etc.
It is manufactured using a process of arranging it to ensure that there is no falsehood. [This arrangement] For two culms, it is necessary to pack fine 5-fiber strands into a quartz tube so that they are densely packed, so in order to improve the i (i V) between the quartz fiber strands, J of water, 11 years ago in a liquid. At this time, it has been proposed to create a dense structure while simultaneously applying mechanical vibrations such as ultrasonic waves. After completing the straw arranging work, the water can be removed by vacuum drying.
However, usually more than 10,000 quartz fibers are used.
Since l is densely packed (N1 moisture is removed!l'11).

In addition, moisture present in defects on the surface of the quartz fiber (
Since it is difficult to remove the residual gas on the surface, there is a concern that the gas absorbed into the defect may also be left behind. Bubbles X'J L Midoshi C remain when changing, image quality In 2'j
- Great flexibility. Furthermore, in the case of J:
Chemical defects LL on the surface of the quartz fiber wire, ++3
In some cases, water can chemically combine to form hydroxyl 1:4. This J is a water lid that is formed in a unique way.
Is Jt high? ! If you draw a line with u'+, then 11;1
It is easy to think that the separation 'C bubbles/i. .

The present invention is considered to be based on the following points,
The purpose of this invention is to provide an image guide wire arrangement method that makes it possible to obtain an image guide with fewer image quality defects.

[Summary of the invention] 1j rope 15, the present invention is an image in which a plurality of quartz-based image guide fiber i-wires are arranged densely in a quartz tube after cleaning their surfaces and then immersing them in liquid C. The method for arranging guide strands is characterized in that the liquid is composed of carbon atoms and fluorine atoms, whereby the liquid is composed of carbon atoms and fluorine atoms. J: I'm going to growl.

[Example] Hereinafter, the present invention will be explained based on the examples carried out.

In this real addition, the liquid is made up of carbon atoms and fluorine atoms. It is possible to obtain an image guide strand arrangement method that makes it possible to create an image guide with few image quality defects.

In addition, as in Example 1, pure quartz is used as a core, and quartz to which boron and fluorine are added as dopants is used as a cladding around the core. 000 lines were arranged.

At this time, the quartz tube was filled with a liquid composed of carbon atoms and fluorine atoms (180 Chemicals MFlutcc).
PP3) is filled with ultrasonic vibration.
I arranged it perfectly. After vacuum drying the quartz tube in which the quartz 711 fiber wires are arranged, the quartz tube is drawn with a wire drawing device so that the 9th line is 1.5 mm, and the outside is exposed to ultraviolet rays mainly containing epoxy acrylate oligomer. Cover it with a hardening material and turn it into an image guide. In this way, an image is observed in the cross section of the image guide with a size of about 10r1), but the size is 101
No more than 1 bubble was observed.

Example 2 A quartz fiber j+l 71 having a core made of quartz doped with dopant 1 to germanium and a cladding of pure 20,000 quartz fibers 71 in a quartz tube so as to be densely I arranged this book. At this time, the quartz tube was filled with a liquid composed of carbon atoms and fluorine atoms (3M Co., Ltd.
FI LJ Oriner tF C-4
0) were arranged while applying ultrasonic vibration. Then, the quartz tube in which the quartz fiber wires were arranged was vacuum dried and then fused and integrated in an electric furnace. The surface of this fused and integrated preform is flame-treated, and the process Fl! The outer diameter is set to 1.0 by the rear drawing device δ. !
A line was drawn to give a diameter of 1 m, and the outside was coated with silicone resin to form an image guide. Images were observed on the cross-section of the image guide having a length of approximately 10 m obtained in this way, but no air bubbles with a size of 10 μm or more were observed. 1 As Example 3, from this carbon atom and fluorine atom (1
The liquid produced in "11" was applied to the cleaning process. In other words, a quartz fiber strand (with pure quartz as a core and a dopant as wire,
fluorine-doped quartz as cladding),
After 1, the sample was immersed in a liquid composed of carbon atoms and fluorine atoms and subjected to ultrasonic cleaning. After air-drying this, it was arranged in the same manner as in Example 1, and then wire-drawn and coated to form an image guide. In the image guide thus obtained, as in Examples 1 and 2 described above, no bubbles with a size of 10 μm or more were observed.

As a comparative example for these Examples 1 to 3, an image guide was prepared by arranging quartz fiber strands in the same manner as in Example 1 above, except that water was used as the liquid.

In other words, a quartz fiber with a core made of pure quartz and a cladding made of quartz doped with boron and fluorine is placed in a quartz tube so as to be densely packed at 20.0%.
00 pieces arranged. At this time, the quartz tubes were filled with water by +6"t and were arranged while applying ultrasonic vibrations.The quartz tubes with the B-Ibara bare wires arranged were then vacuum-dried. Later, a wire was drawn to an outer diameter of 1.5 mm using a wire drawing device, and the outside was coated with ultraviolet curing +A%'3+ mainly composed of El-1-cyacrylate-1~oligomer to form a No.C image guide. J: As a result of observing and observing the image on the m1 side of the image guide with a roughness of about 10 m obtained from sea urchin, there were about 10 bubbles with a size of 10 μm or more.
Recognized individually.

In this way, Examples 1 to 3 exhibited no air bubbles and fewer image quality defects than the comparative examples. This is because a liquid composed of 114 fluorine atoms and carbon atoms was used.

J, that is, i composed of a charcoal atom and a futsume atom
The ff body is a compound represented by Cn F2n+2 <n is an integer) (n is generally 5 to 14), but since it is inert, it does not attack or react with the surface of the quartz fiber wire. Moreover, the surface tension is small (1
(2 to 18 dyne/crn), it has poor permeability and displaces and expels moisture and air bubbles that accumulate in surface defects. Furthermore, since it is inert and can be easily removed, the drying process can be shortened.

In this example, ultrasonic vibration was applied when arranging the quartz fiber wires, but heating may also be applied.

[Effects of the Invention] As described in the above, the present invention provides an image guide wire arrangement method that can produce one image guide with fewer image quality defects.
It is possible to obtain an image guide strand arrangement method that makes it possible to create an image guide with few image quality defects in the same manner as in the present invention.

Claims (1)

[Claims] (1) In an image guide wire arrangement method in which a plurality of quartz-based image guide fiber wires are arranged densely in a quartz tube while their surfaces are cleaned and then immersed in a liquid, the liquid is carbon A method for arranging image guide wires, characterized in that the image guide wires are composed of atoms and fluorine atoms.