JPS58152205A - Optical scanning head - Google Patents

Abstract

PURPOSE:To prevent the breakage and erroneous selection of optical fibers during the operation by assembling optical fiber bundles and synthetic fiber bundles like a plain weave fabric thereby forming an optical scanning head. CONSTITUTION:An optical scanning head is constituted by containing synthetic fiber bundles 12 consisting of plural pieces of bundles which are unified in the longitudinal direction to a prescribed width and are arranged roughly in parallel, flat optical fiber bundles 11 consisting of plural pieces which are assembled with the bundles 12 like a plain weave fabric at prescribed intervals, and a scanning plane 14 where the sections of the bundles 11 expose. Since the optical fiber bundles and the synthetic fiber bundles are assembled like a plain weave fabric in the above-mentioned way, plural pieces of the heads having plural scanning planes of optional widths are obtained with one time of operation, and the arrays of the optical fiber bundles are held in conformity with the arrays of the optical fiber bundles on the scanning planes, and the steps for selecting the terminals are eliminated, whereby the breakage and erroneous selection of the optical fibers during the operation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical scanning head, and more particularly to an optical scanning head used in a facsimile machine to scan an original for reading and for recording on recording paper.

As shown in the perspective view of Fig. 1, a conventional optical scanning head consists of a bundle of optical fibers 1, which is made up of a plurality of optical fibers arranged in parallel at predetermined intervals, and one end of the bundle of optical fibers 1 is fixed with transparent resin. The molding section 3 includes a scanning surface 4 in which a cross section of the optical fiber bundle 1 is exposed.

The optical fiber bundles 1 exposed on the scanning surface 4 are arranged in a straight line at predetermined intervals. The resolution η of a facsimile machine is determined by the spacing between the arrays, but recently there has been a demand for improved resolution of facsimile machines, and an array with an array density of 916 lines per unit has become necessary. In the case of an optical scanning head with a scanning width of 200 m + (equivalent to JISA 4 size), an optical fiber with an outer diameter of 50 μm can be
This array has 1.

The other end of the arranged optical fibers 1 is formed into a circular shape in the same arrangement order as the optical fiber bundle 1 on the scanning surface 4, and is fixed with synthetic resin to form a circular end 1ii5.

Using such an optical scanning head, the optical fiber bundle 1 picks up the reflected light from the surface of the document, which is irradiated integrally with the scanning surface 4 in close contact with the document. The incident light from the optical fiber bundle 1 in the scanning direction 4 is guided to the circular end face 5 at the other end, received by the crank-shaped optical fiber 6, and then guided to the optical sensor 7, where it is applied to a voltage value corresponding to the density of the document surface. converted.

By rotating the optical fiber 6 in the direction AK of the arrow, scanning of the f-plane 4 in the direction B of the arrow is performed.

Further, a light modulating light source (not particularly shown) is used in place of the optical sensor 7, and recording scanning is performed by bringing a photosensitive recording paper into close contact with the scanning surface 4 and modulating the light modulating light guide with an input image signal.

In such an optical scanning head, as shown in the plan view for explaining the manufacturing process in FIG.
Optical fibers 1' with an outer diameter of about 50#m are inserted and arranged in the
A groove 1 provided at one end of the flat plate 8 in a direction perpendicular to the guide groove 9.
In step o, the arranged optical fiber bundle 1 is solidified with transparent resin to obtain a molded part 3'.

Next, the optical fiber bundle l arranged from the flat plate 8 and the forming part 3
1 is removed, and a molded part s3 having a scanning surface 4 polished at a predetermined inclination angle to a flat end face with an exposed cross section of the optical fiber bundle 1 of the molded part 3' as shown by the dashed line in FIG. 2 is formed. obtain. This angle of inclination is set to a value that allows the reflected light from the document surface to be picked up most efficiently.

The other end of the optical fiber bundle 1 has 3200 optical fibers II.
The tips of the optical fibers are selected and shaped into a circle so that they are arranged in the same order as the optical fiber bundle 1 on the scanning surface 4, and then solidified with resin to form a circular end face 5.

Therefore, in the conventional optical scanning head, only one optical scanning head with a scanning surface 4 of a predetermined width can be used in one operation, and each optical fiber 1' is easily damaged because only one end of the optical fiber 1' is fixed. If the knife is damaged during operation, the optical scanning head will be defective. Furthermore, it takes a lot of man-hours to select the arrangement of the other end of the optical fiber with one end fixed, and it is difficult to completely eliminate the selection process, resulting in extremely low manufacturing yields. Becomes expensive.

According to manufacturing data, 1 comb 16 with a scanning width of 200
In the case of an optical scanning head with an arrangement density of , it takes about 2 hours to arrange the heads, about 5 hours to select the terminals, and the manufacturing quality is about 50.

That is, the conventional optical scanning head has the drawbacks of extremely low productivity and high cost.

An object of the present invention is to provide an optical scanning head with extremely high productivity and low cost.

The optical scanning head of the present invention includes a synthetic fiber bundle made up of a plurality of synthetic fibers arranged substantially parallel to each other with their lengths aligned to a predetermined width and having at least one arrangement cutout portion adjacent to each other; an optical fiber bundle consisting of a plurality of nine optical fibers that are incorporated in a plain weave manner so that every other fiber intersects with the synthetic fiber bundle at intervals of;
A scanning surface obtained by fixing the arranged missing part of the synthetic fiber bundle with a transparent resin and cutting a substantially central part of the fixed part in a direction substantially perpendicular to the optical fiber bundle. be done.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 3 is a perspective view showing an embodiment of the present invention, and the optical scanning head shown in FIG. The optical fiber bundle 11 includes nine optical fiber bundles 11 which are incorporated into a synthetic fiber bundle 12 in a plain weave manner at predetermined intervals, and nine scans 1fi14 in which the cross section of the optical fiber bundle 11 is exposed.

Below, the manufacturing process of the optical scanning head shown in FIG. 3 will be explained in detail with reference to FIGS. 4 and 5. 4 is a plan view for explaining the first step of manufacturing the embodiment shown in FIG. 3, and FIG. 5 is a plan view of the second step of manufacturing the embodiment shown in FIG.
It is a top view for explaining the process.

The first step in manufacturing the optical scanning head shown in FIG. 3 is to incorporate the optical fibers 11 into the synthetic fiber bundle 12 in a plain weave manner at a density of 16 fibers per 1ms+, as shown in FIG. Synthetic fibers 12' with a diameter of approximately 20 μm are arranged approximately in parallel with each other at a density of approximately 16 fibers per 1 block, with the length direction aligned to a predetermined width, and a plurality of synthetic fibers are arranged in the arrangement deletion portion 16. Remove 12'.

3200 optical fibers 11' having an outer diameter of 40 μm are incorporated in a plain weave pattern at a pitch of 1/16101 so as to intersect every other synthetic fiber 12' arranged in this manner. When using the above materials, the optical fiber 11' is tightly connected to the synthetic fiber 1
2', an optical scanning head with a predetermined density of 10 to 16 can be obtained.

The first step is to assemble two pieces similar to the above-mentioned conventional method using a plain loom for about 1 hour, and to complete in about 30 minutes using a special automatic machine. In comparison, the man-hours are reduced by 1/4 with a plain loom and 11 with a dedicated automatic machine, and furthermore, with automatic machines, one person can work on several machines at the same time.

Further, the desired length can be freely obtained by setting the length of the synthetic fiber 12'.

Next, in the second step, the fabric assembled into a plain weave is placed on a flat plate, and the array missing portion 16 is fixed with a transparent resin. Line segment C shown in
At D, the optical fiber east 11 is cut in a substantially perpendicular direction. Next, the surface where the cross section of the optical fiber bundle 11 of the obtained molded part 13 is exposed is polished into a flat surface with the same inclination angle as in the conventional example described above to form a scanning surface 14. In this way, a hand-made optical scanning head as shown in FIG. 5 is obtained.

The optical fiber bundle 11 and the synthetic fiber bundle 12 are pressed against each other and meander, but the optical fiber bundle 11 in the arrangement deletion part 16
Since there is no synthetic fiber 12', it is stretched straight.

Therefore, the cross section of the optical fiber bundle 11 exposed on the scanning surface 14 of the molding section 13 is arranged in a row with a density of 916 fibers per fiber.

If such a work process is adopted, when the synthetic fiber bundle 12 has one arrangement deletion part 16 due to the -times of assembling work, it is possible to cut it and obtain two left and right optical scanning heads at the same time. By selecting the cutting position in the direction parallel to the fiber east 11, a plurality of m lengths of arbitrary lengths of the scanning surface 14, that is, scanning widths, can be obtained.

Further, as shown in FIG. 5, the optical fiber bundle 11 excluding the molding part 13 is held by the synthetic fiber bundle 12 in the same arrangement order as the optical fiber bundle 11 on the scanning surface 14,
No man-hours are required for selecting the tip of the circular end face 15, and selection errors can be prevented. In addition, since the optical fiber bundle 11 is held together by the synthetic fiber bundle 12, it is possible to prevent defects due to breakage of the optical fiber 11' during production, improving the manufacturing yield to 90- or more. can.

As explained above, in the embodiments of the present invention, the array deletion portions may be -≠ locations, but there may be multiple locations of 2' m or more. Efficiency can be further improved.

As described above, by incorporating an optical fiber bundle and a synthetic fiber bundle into a plain weave, the optical scanning head of the present invention can obtain a plurality of scanning surfaces having a plurality of arbitrary widths in one operation. The arrangement of the optical fiber bundles is maintained in a state corresponding to the arrangement of the optical fiber bundles on the scanning plane, eliminating the need for additional man-hours for terminal selection and preventing damage to optical fibers and selection errors during work. Therefore, it has the effect of being extremely productive and can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional example, FIG. 2 is a plan view for explaining the manufacturing process of the conventional example shown in FIG. 1, and FIG. 3 is a perspective view showing an embodiment of the present invention. 4 is a plan view for explaining the first step of manufacturing the embodiment shown in FIG. 3, and FIG. 5 is a plan view for explaining the second step of manufacturing the embodiment shown in FIG. 3. It is. In the figure, 1, 11... optical fiber bundle, 11
゜111...Optical fiber, 12...Synthetic fiber bundle, 12'...Synthetic fiber, 3.3', 1
3... Molding part, 4゜14... Scanning surface,
5, 15...Circular end face, 16...Arrangement deletion part. q Figure 1 Figure 3

Claims (1)

[Claims] A synthetic fiber bundle consisting of a plurality of fibers arranged approximately in parallel #1 with the length direction aligned at a predetermined distance and having at least one arrangement deletion portion adjacent to each other, and the synthetic fiber bundle having a predetermined interval. An optical fiber bundle consisting of a plurality of nine optical fibers that are incorporated in the fiber bundle in a flat pattern so that every other fiber intersects, and the arrangement missing part of the synthetic fiber bundle are fixed with transparent resin, and the approximately central part of the fixed part is fixed. and a scanning surface obtained by cutting the optical fiber bundle in a direction substantially perpendicular to the optical fiber bundle.