JPS59224805A - Manufacture of optical transmitter array - Google Patents

Abstract

PURPOSE:To array optical transmitters with extremely high precision and to facilitate the manufacture greatly by forming grooves for arraying the optical transmitters in a sectional shape in one plate type body. CONSTITUTION:The optical transmitters 22 are extended over a stepped surface 15 having numbers of V-sectioned grooves while straddling the stepped surface 15. Then, a wedgelike pressure plate 24 is set on both projection parts 18, and pins 26 are inserted into pin holes 25 formed in both lengthwise end parts of the pressure plate 24 and pin holes 21 in a reference frame plate 12 to specify the relative positions of the reference frame plate 12 and pressure plate 24 at right angles to the pins 26. Then, the pressure plate 24 and reference frame plate 12 are fixed temporarily at the projection part 18 with an adhesive. At this time, the surface 24a of the pressure plate 24 and the reverse surface 12a of the reference frame plate 12 are parallel to each other. Then, arrays 11 in said state are dipped in a resin tank 31 filled with black silicone resin 27 to charge gaps among the reference frame plate 12, pressure plate 24, and optical transmitters 22 and 23 with the resin 27 completely, thus adhering the reference frame plate 12, pressure plate 24, and optical transmitters 22 and 23 together fixedly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides optical transmission in which optical transmission bodies are arranged in a plurality of rows, and an image of an object located on an object plane is transmitted at a magnification other than 1. The present invention relates to a method for manufacturing a body array.

FIG. 1 shows one conventional example of such an optical transmission body array. As shown in Fig. 1, an optical transmitter array (1
), a large number of cylindrical optical transmission bodies (2)
arranged in columns. The optical transmission body (2) is formed by a predetermined holding member (2) so that it forms a fan shape in the same row, and these fan shapes face each other in a non-parallel manner, and each end surface (2aX2b) forms a staggered shape. 3).

Play (1) creates an entire image with a two-dimensional spread by superimposing parts of the enlarged or reduced real images that are created on the image plane by each optical transmission body (2) in the vicinity of each other. can be simultaneously transmitted from the object plane to the image plane at a magnification other than 1, so it is useful if applied to an enlargement type or reduction type copying machine.

By the way, in the array (1), as mentioned above, the enlarged and reduced real images produced by the individual optical transmitters (2) are superimposed on each other in the vicinity, so /Ql high resolution can be achieved. In order to obtain an array (1) having the following characteristics, it is necessary to accurately superimpose the individual real images, and for this purpose, it is necessary to arrange the optical transmission bodies (2) with extremely high precision.

If the optical transmission bodies are arrayed parallel to each other, a highly accurate arrangement with a uniform distance between optical axes can be obtained by simply stacking the optical transmission bodies in a houndstooth pattern.

However, in the array (11), the optical transmission bodies (2) are not parallel to each other, so the above method cannot obtain the arrangement of the optical transmission bodies (2) as shown in Figure 1. For this reason, a method of manufacturing the array (1) that allows the optical transmission bodies (2) to be arranged with extremely high precision and is extremely easy to manufacture is currently not generally known.

In view of these problems, the present invention provides a method for manufacturing an optical transmitter array that can obtain high resolution by arranging optical transmitters with extremely high precision and is also extremely easy to manufacture. is intended to provide.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 2 to 10.

FIGS. 2 to 5 show the optical transmitter array in the manufacturing process. As shown in Figures 2 to 5, in order to manufacture an optical transmitter array (1υ), first, a reference frame plate (12) made of FRP (fiber reinforced resin), etc. is processed by NC processing or injection molding. etc., to form a rectangular plate shape and approximately wedge shape.

On the surface of the reference frame plate (12+), wide grooves and wrinkles are formed that extend in the longitudinal direction of the reference frame plate (12+) and become deeper in a stepwise manner from both sides.

The first step surface 0 of the groove (13) is the reference frame plate (
12 at a slight angle, for example 0.
The slope is about 1 degree, and the second step surface (the bottom surface of the field is
The back surface (12a) is also inclined at a slight angle in the direction opposite to the step surface αa.

The step surface (14) (151 has a large number of V-shaped grooves (1
, 6) 0.7] is formed. As clearly shown in Figure 6, one groove (16) (171) located approximately in the longitudinal center of the reference frame plate (16H1) crosses the groove at right angles. It extends in the direction.
In the other groove (1G) fl, it is inclined in the step surface (1 (A) (15)) with respect to this central groove (16) These grooves (
16) ar forms two sectors as a whole. Further, these grooves (1, 6) Q7) are formed in a staggered manner with respect to each other, as clearly shown in FIG.

At both ends of the reference frame plate (+2) in the longitudinal direction, a protrusion o mark is formed that protrudes in a direction perpendicular to the step surface (14). In addition, in approximately the center of each of these protrusions, there is a cylindrical bottle hole (21) perpendicular to the back surface (12a).
) is formed.

Next, a reference frame plate (1
The optical transmission bodies (second floor and (221) are placed in the grooves (17) and ae of No. 21 in this order, that is, sequentially from the groove closer to the back surface (12a).

Optical transmitter 127J (23+ is made of transparent material such as glass or synthetic resin into a cylindrical shape, and its refractive index is maximum at the axial center position and decreases in approximately proportion to the square of the distance in the radial direction. Therefore, even if the light input/output end face is flat, it has a lens effect, and a gradient index lens is used in which the light travels while meandering around the axis.

The optical transmission body (2) placed in the groove 0η has a length approximately equal to the length of this groove η, but the optical transmission body (2) placed in the groove α0 is Use one with a length approximately equal to the width of the frame plate α.

Therefore, the light transmission body 0 and the stair surface (1!9) are straddled over this stair surface (1).

Next, as shown in FIG. Insert the pin (2a) into the hole (2I) and the bottle hole (2I) of the reference frame plate 02,
The relative position of the reference frame plate (1) and the presser plate (material) in the direction perpendicular to this pin (2e) is controlled.

Then, the holding plate (24) and the reference frame plate (Ia) are temporarily fixed to each other at the protrusion (18) with adhesive.

At this time, the front surface (24a) of the presser plate (24) and the back surface (12a) of the reference frame plate (12+) are parallel to each other.

Next, the array (11) in the above state is immersed in a resin tank (31) of black silicone resin (filled with 2η), as shown in FIG. This resin tank (31) is placed in a low-pressure container (3), and due to this low pressure, air bubbles inside the resin (2) are completely removed.

Therefore, the gap between the reference frame plate (vlrs holding plate (24) and the optical transmitter tube (23) is completely filled with resin (2), so the array B is taken out from the resin tank (9) and the resin is removed. (When 2η is cured, the reference frame plate (12)
, the holding plate (24) and the optical transmission body 1221 (23) are adhesively fixed to each other, and stray light between the optical transmission bodies 1221 (23) is prevented.

Finally, play (cut or grind 1υ) along the dashed-dotted curve in Figures 6 and 5, and further cut or grind this array (1υ).
1) Polish the light input/output end face.

FIGS. 7 to 10 show array circles manufactured by the method described above. As shown in FIGS. 7 to 10, each optical axis of the optical transmission body (22) C23) forms a fan shape both on the plane and on the side of the array circle. Further, one end surface of the optical transmission body (2'4 (23)) is arranged in a dense staggered pattern, and the other end surface is arranged in a rough staggered pattern.

Note that the curvature of the entrance and exit surfaces of array 0υ seen from the side is actually very small, so these are considered to be planes, and array 01
) in place of the shape shown in Figure 10A.
The shape shown in FIG. B may also be used.

Although the present invention has been described above based on one embodiment, the present invention is not limited to this embodiment, and various modifications are possible.

For example, in the above embodiment, the optical transmission body (2
3) are arranged in a fan shape on both the plane and side surfaces of the array (former array), but they may be arranged in a fan shape only on the plane and parallel to each other on the side surfaces. In that case,
The image is enlarged or reduced only in the plane and not in the sides. However, even in that case, effects such as an increase in the amount of transmitted light can be obtained by arranging the optical transmission bodies (2'IJ (c)) in a plurality of rows.

In addition, in the embodiment shown in "-", the optical transmission body (22 (2
Although the floors are arranged in two rows, it is also possible to arrange them in a desired number of six or more rows.

As described above, in the method of manufacturing an optical transmission body play according to the invention, grooves for arranging optical transmission bodies in a plurality of rows in a fan shape are formed in one plate-shaped body.

Therefore, compared to, for example, forming grooves on a plurality of plate-like bodies and positioning these plate-like bodies with each other, the positional accuracy of the grooves can be made higher (and the optical transmission bodies can be aligned with each other with high precision). Therefore, an optical transmitter array with high resolution can be manufactured.

Furthermore, in the method for manufacturing an optical transmitter array according to the present invention, the grooves for arranging the optical transmitters in a plurality of rows in a fan shape are formed only on one side of one plate-like member. . Therefore, there is no need to invert the plate-shaped body during groove machining, and this also makes it possible to further improve the positional accuracy of the grooves, allowing the optical transmission bodies to be aligned with each other with even higher precision. Therefore, it is possible to manufacture an optical transmission body array with even higher resolution.

Furthermore, in the method of manufacturing an optical transmitter array according to the present invention, as described above, the grooves for arranging the optical transmitters in a plurality of rows in a fan shape are formed only on one side of one plate-like member. is forming. Therefore, there is no need to invert the plate-shaped body when placing the light transmitting bodies in the grooves, and it is sufficient to simply place these light transmitting bodies in the grooves, making manufacturing very easy.

[Brief explanation of drawings]

FIG. 1 shows one of the optical transmitter arrays manufactured according to the present invention.
FIG. 2 is a schematic perspective view showing two conventional examples. 2 to 10 show an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a state in the middle of the manufacturing process according to the present invention, and FIG. 4 is a view in the same direction as the ■ arrow, FIG. 5 is a cross-sectional view along the line ■-v in the same figure, and FIG. 6 is a schematic cross-sectional view showing another state in the middle of the manufacturing process according to the present invention. FIG. 7 is a schematic plan view of the optical transmitter array manufactured according to this embodiment, FIG. 8 is a front view thereof, FIG. 9 is a rear view thereof, and FIG. 10 is a side view thereof. In addition, in the symbols used in the drawings, I-...
・・・・ Optical transmitter array 02・・・・ Reference frame plate (1~・ Groove (14) ・・First step surface (I5) Second step surface 06×17) Groove (2 gongs (23) Light Transmission body (goods): Holding plate (27), silicone resin. Agent: Yoshio Katsunekane, Toshio Sugiura, Figure 1, Figure 6 (00'. ~ to -N
'%++ )N
To CN＼ (

Claims (1)

[Claims] forming a plurality of grooves on one surface side of the first plate-shaped body, the grooves being included in each stepped surface of the groove that deepens in a stepwise manner from both sides and extending fan-shaped in a direction across the groove; , arranging a light transmitting body in each of the plurality of grooves so as to cross the grooves, and arranging a second plate-like body on top of the first plate-like body and the disposed light transmitting body. a step of temporarily fixing the first and second plate-like bodies to each other; and filling a gap between the first and second plate-like bodies and the optical transmission body with resin to fix them to each other. and a step of molding the first and second plate-like bodies fixed to each other, the light transmitting body, and the filled resin into a predetermined shape.