JPH06309482A - Picture reader - Google Patents

Abstract

PURPOSE:To remove dispersion in the pitch and height directions of light transmitting optical fibers. CONSTITUTION:A picture reader 50 for transmitting light from a mark 1b corresponding to respective information of a microfilm 1 to photo-electric means corresponding to plural light transmitting optical fibers 29 through the fibers 29 and detecting electric signals obtained by photoelectric conversion is characterized by integrally constituting a fiber group obtained by arranging the prescribed number of positioning fibers 29a having the same diameter between respective fibers 29 and adhesively aligning them and a fiber holder 22 having oblong hole parts 21a into which the fibers 29a are inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for detecting mark information attached to a large number of information recorded on an information recording medium by photoelectric conversion, such as a film search of a microfilm. Regarding

[0002]

2. Description of the Related Art Conventionally, an apparatus for detecting a mark for image frame search attached to a microfilm, as shown in FIGS. And photoelectric conversion means 103 such as a phototransistor for photoelectrically converting light passing through the microfilm 100, and photoelectric conversion means 103.
The optical fiber 104 for guiding light for guiding the light of the mark 101 portion is also provided.

That is, when the portion of the microfilm 100 other than the mark 101 passes, the light from the illuminating means 102 passes through as it is and enters the photoelectric conversion means 103.

On the other hand, in the portion of the mark 101, since the light from the illumination means 102 is blocked by the mark 101 and does not enter the photoelectric conversion means 103, the output voltage of the photoelectric conversion means 103 changes due to the passage of the mark 101, and the mark 101 101 can be detected. In order to surely identify the length, size, etc. of the mark 101, a plurality of light guiding optical fibers 104 are arranged at a predetermined interval in the film transfer direction, and each light guiding optical fiber 1
The size of the mark 101 and the like are identified by the timing of the mark 101 detected by 04.

The plurality of light guiding optical fibers 1
As shown in FIG. 8A, in No. 04, a V groove 106 is provided in the base member 105, each light guiding optical fiber 104 is mounted in the V groove 106, and the optical fiber 104 is fixed with an adhesive 107, and a holding member. It was positioned at a predetermined position by pressing with 108.

[0006]

Conventionally, a plurality of light guiding optical fibers 104 are supported by a base member 105, but variations in the pitch P and height direction of the light guiding optical fibers 104 occur.
There is a problem that the mark 101 having a small length and height cannot be accurately read.

Further, as shown in FIG. 8B, the position of the light guiding optical fiber 104 supported by the base member 105 and the pressing member 108 is shaded on the screen and is unknown from the outside. 1
It was difficult to align 04 with the position of the mark 101 on the film, which also made accurate detection of the mark 101 difficult.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an image reading apparatus in which there is no variation in the pitch and height direction of the light guiding optical fibers.

Another object of the present invention is to provide an image reading apparatus which can easily and accurately align the light guiding optical fiber with the mark position on the film.

[0010]

In order to achieve the above object, the present invention provides a plurality of optical fibers for guiding light with mark information provided corresponding to each information on an information recording medium such as a microfilm. In the image reading device for detecting by photoelectrically converting the light by guiding it to the photoelectric conversion means corresponding to the light guiding optical fiber, a predetermined number of positioning fibers having the same diameter are interposed between the light guiding optical fibers. It is characterized in that a group of fibers closely arranged in a row and a fiber holder having a slot for inserting the group of fibers are integrally formed.

Further, it is preferable to have an index portion on the extension line of the elongated hole portion of the fiber holder in the fiber arrangement direction.

The fiber holder is formed of a flexible member by integrating the elongated hole portion and the index portion.

[0013]

According to the present invention having the above-described structure, a fiber group in which a predetermined number of positioning fibers having the same diameter are interposed between the optical fibers for guiding light and closely arranged in a line, and a slot for inserting the fiber group are provided. By integrally forming the fiber holder having the portion, variations in the pitch and the height direction of the light guiding optical fiber are prevented.

Further, the fiber group and the fiber holder having the long hole portion for inserting the fiber group are integrally formed, and the index portion is provided on the extension line of the fiber holder in the long hole portion of the fiber holder, It is possible to prevent the deviation of the light guiding optical fiber and the index portion from occurring, and it is possible to easily and accurately align the light guiding optical fiber with the mark position on the film.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. 1 to 4 show an image reading apparatus according to an embodiment of the present invention.

FIG. 4 shows a schematic structure of a microfilm reader printer equipped with a search device to which the image reading device of the present invention is applied. In FIG. 4, reference numeral 1 denotes a microfilm as an information recording medium. A large number of image frames as recording information are recorded on the recording medium, and counting marks 1b are provided on the side edges of each image frame 1a. The microfilm 1 is accommodated in a film supply cartridge 2 in a roll shape, and is delivered from a delivery port 2a by a capstan roller 6 driven by a delivery motor 5. The capstan roller 6 is movable via a support arm 8 to a position in contact with the microfilm 1 and a position away from the microfilm 1, and the support arm 8 is driven by a solenoid 7. The fed microfilm 1 is taken up by the film take-up reel 13 by the guide rollers 9 and 10. 12
Is a guide roller, and pressure is applied to the winding shaft 13a of the winding reel 13 by the spring 12a so that the leading end of the film 1 is reliably wound around the winding shaft 13a of the winding reel 13. There is.

Further, 3 is a film rewinding motor for rotating a film spool (not shown) in the cartridge 1, and 4 is a film winding motor for rotating the take-up reel 13.

Although not shown, the cartridge 2
A guide plate for guiding the film 1 is provided along a predetermined film feeding path between the take-up reel 13 and the take-up reel 13.

When the feed motor 5 is driven and the solenoid 7 is actuated in the above structure, the tip of the microfilm 1 is fed from the cartridge 2 due to the contact between the capstan roller 6 and the microfilm 1.
The microfilm 1 is fed toward the take-up reel 13 along a predetermined path. When the leading edge of the microfilm 1 passes through the guide roller 9, a film detector (not shown) detects the microfilm 1, and the winding motor 4 is driven by the detection signal to rotate the winding reel 13.

When the tip of the microfilm 1 is fed to the take-up reel 13, the guide roller 12 works so that the tip of the microfilm 1 is taken up.
The winding shaft 13a of No. 3 automatically winds. When the microfilm 1 is wound around the take-up reel 13, the rewinding motor 3 and the solenoid 7 are deactivated, and the capstan roller 6 is separated from the microfilm 1 and returns to its original position. Microfilm 1 is take-up reel 13
When wound around, the microfilm 1 is taken from the cartridge 2 by the rotation of the take-up reel 13.
Transferred to 3.

When the microfilm 1 is rewound into the cartridge, the take-up motor 4 is deactivated and the rewinding motor 3 is driven so that the film spool (not shown) in the cartridge 2 winds up the microfilm 1. Then, the microfilm 1 is rewound into the cartridge 2 by rotating. Therefore, the microfilm 1 can be moved forward and backward by driving either the motor 3 or 4.

Reference numeral 14 is a lamp for illuminating the microfilm 1, 15 is a condenser lens, and 16 is a reflection mirror 1 for reflecting the image of the microfilm 1 illuminated by the lamp 14.
It is a projection lens for projecting on the screen 18 via 7 or enlarging and projecting on the photosensitive drum 30 via the reflecting mirrors 19 and 20. Further, 11 is a sensor unit for detecting the mark 1b of the microfilm 1. The sensor unit 11 is provided with an Ach and Bch image reading device 50 as shown in FIG. 1 in order to detect the marks 1b provided on both sides of the microfilm 1. Description of the Ach and Bch image reading devices 50 is omitted.

The image reading apparatus 50 includes a lamp (not shown) as an illuminating means for irradiating the mark 1b portion of the microfilm 1 with light, and the microfilm 1
Photoelectric conversion element (photoelectric conversion means) 26 such as a phototransistor for photoelectrically converting the light passing therethrough, and photoelectric conversion element 2
Up to 6 are provided with a plurality of light guiding optical fibers 29 for guiding the information light of the mark 1b of the microfilm 1.

The light guiding optical fiber 29 is
In this embodiment, φ0.25 mm acrylic fiber is used, and the symbols IN, P, F1, F2, and B attached to each light guiding optical fiber 29 indicate the arrangement of each light guiding optical fiber 29. , IN, P are reference fibers, and both reference fibers IN, P are in close contact with each other. By stopping the end surface of the mark on the reference side between the reference fibers IN and P, the stop position is made constant. on the other hand,
Optical fibers 29 for guiding light with reference numerals F1, F2 and B
Is used to detect the mark size.

As shown in FIG. 2, one end of each of the optical fibers 29 for light guiding for reference and detection is arranged in the vicinity of the microfilm 1 and serves as an incident side end portion on which light is incident, and the other end is It is arranged in the vicinity of the photoelectric conversion element 26 and serves as an emission side end portion that emits the guided light. The incident-side end portions are closely arranged in a line through a predetermined number of positioning optical fibers 29a having the same diameter interposed between the light guiding optical fibers 29.

The incident side ends of the light guiding and positioning optical fibers 29, 29a are inserted into and supported by the elongated holes 21a of the fiber holder 22 as shown in FIG. Positioning optical fiber 29a
Is only a predetermined length at the tip. In this embodiment, the positioning optical fiber 29a is made of the same material and has the same diameter as the light guiding optical fiber 29. The optical fiber is not limited to the optical fiber as long as it has the same diameter, and may be made of another material. The fiber holder 22 is mounted on the lower base 34 of the sensor unit 11 via the Ach base 24 and the Ach arm 23, and is movable in the X and Y directions orthogonal to each other. Further, the material is a flexible member (plastic or the like) so as to be in close contact with the guide glass 28. An index portion 21c is provided on the side surface of the elongated hole portion 21a of the fiber holder 22 on an extension line in the arrangement direction of the light guiding optical fibers 29. This index part 21
c has a triangular shape, is in contact with the plate glass 28 as shown in FIG. 2, and the center of the index portion 21c indicates the center of the fiber diameter. Reference numeral 21b is an uneven portion, 21d is a straight portion, and 36 is an upper plate glass.

On the other hand, a stepped cylindrical holder 25 having a different diameter is fixed to the end of the fiber output side, and the lower base 34 of the sensor unit 11 and the sensor unit cover 35 are connected via this holder 25. It is sandwiched between them.
Further, a printed board 27 having a photoelectric conversion element 26 such as a phototransistor attached thereto is attached to the end surfaces of the lower base 34 and the sensor unit cover 35.

The printed board 27 has the photoelectric conversion element 26, an amplifier circuit (not shown), and a mark discriminating circuit.
Data is sent to PU. The holder 25 at the fiber output end is pressed toward the printed board 27 by the elastic members 33, 38 such as springs and leaf springs, and the holder 25 at the fiber output end is pressed axially and downwardly for positioning. It is supposed to do.

Further, a diffusion sheet 30 as a diffusion means for diffusing light is arranged between the photoelectric conversion element 26 and the fiber output end.

Reference numeral 28 is a microfilm guide glass located at the bottom of the sensor unit 11. Further, 39 is a film pressure plate glass, and the micro film 1 is sandwiched by a solenoid or the like. On the other hand, 31,3
2 is a sensor sliding dial, which has a cylindrical shaft portion 31a,
The fiber array is moved in the X1 and X2 directions by the concave portion 32a and the Bch and Ach arms 23 and 23 '.

The fiber arrangement of the image reading apparatus on the Ach side of FIG. 1 is also arranged on the Bch side, and each fiber row is moved in the X1 and X2 directions by the dials 31 and 32, and Y ₁ by the knob portions 24b and 24b '. It can be moved in the Y ₂ direction. Here, the sliding mechanism in the X and Y directions will be described. Reference numeral 23 denotes an Ach arm and 23 'denotes a Bch arm, and the fiber holders 22 and 22' of the Ach and Bch image reading devices are the same. It is fixed on the Bch and Ach arms 23 and 23 '. The Ach and Bch arms 23, 23 'are provided with elongated guide holes 23a, 23a' extending in the X direction. The round shafts 24a, 24a 'are fitted into the elongated holes 23a, 23a'. There is. The sensor sliding dials 31 and 32 are provided with shaft portions 31a and 32a, respectively.
a fits into the recesses of the Bch and Ach arms 23 and 23 '. Further, 24 and 24 'are Bch bases and Ach bases, which are provided with elongated holes 24a and 24a' extending in the Y direction, and which are fitted to the shaft portion 34a of the lower base 34, and are
It serves as a guide in the Y2 direction.

In the image reading apparatus having the above structure, the light passing through the mark 1b of the microfilm 1 passes through the light guiding optical fiber 29 and is applied to the photoelectric conversion element 27 through the diffusion plate 30. The pitch of the light guiding optical fibers 29 in the arrangement direction is accurately determined by the positioning optical fibers 29a closely arranged between the light guiding optical fibers 29. Further, by setting the positioning optical fiber 29a to have the same diameter as the light guiding optical fiber 29,
Since the index portion 21c can be integrally formed on the extension line of the row of the light guiding optical fibers 29, 29a, the light guiding optical fiber 29 is based on the index portion 21c.
The position of and the position of the mark 1b can be accurately aligned.

Next, another embodiment of the present invention will be described.

As shown in FIG. 5, in the fiber holder 22,
When the fiber row pressing portion 22f is integrally formed, the fiber row as the fiber group can be easily fixed, and the positional fluctuation at the time of bonding can be reduced. Further, a hole 21g for adjusting the elastic strength may be provided and integrally molded.

Further, as shown in FIG. 6, the fiber holder 2
The shape of the elongated hole portion 21a of the fiber tip end insertion portion of 2 is provided with a large taper portion 21e and a small number of straight portions 21d, so that the fiber row can be positioned and the work at the time of adhering the fiber row is facilitated. You can do it.

[0036]

As described above, according to the present invention,
By configuring the fiber group in which a predetermined number of positioning fibers of the same diameter are arranged in close contact in a line between the optical fibers for light guide and the fiber holder having the slot for inserting the fiber group, Variations in the pitch and height direction of the light guiding optical fiber are prevented. This ensures that small marks can be detected.

Further, the fiber group and the fiber holder having the long hole portion for inserting the fiber group are integrally formed, and the index portion is provided on the extension line of the fiber holder in the long hole portion of the fiber holder, It is possible to prevent the deviation of the light guiding optical fiber and the index portion from occurring, and it is possible to easily and accurately align the light guiding optical fiber with the mark position on the film.

[Brief description of drawings]

FIG. 1 is a plan view of a sensor unit to which an image reading apparatus according to an embodiment of the present invention is applied.

FIG. 2 is an enlarged cross-sectional view of the image reading device on the channel side of the sensor unit A in FIG.

FIG. 3 is a plan view showing the overall configuration of the sensor unit shown in FIG.

4 is a schematic configuration diagram of a microfilm reader printer to which the sensor unit of FIG. 1 is applied.

FIG. 5 is a perspective view showing another embodiment of the fiber holder.

FIG. 6 is a sectional view showing still another embodiment of the fiber holder.

FIG. 7 is a sectional view showing a schematic configuration of a conventional image reading apparatus.

FIG. 8A is a cross-sectional view showing an array configuration of a conventional light guiding optical fiber, and FIG. 8B is a plan view of the array configuration.

[Explanation of symbols]

 1 micro film (information recording medium) 1b mark 29 optical fiber for light guide 29a positioning fiber 21c index part 21a long hole part 26 photoelectric conversion element 22 fiber holder

Claims (3)

[Claims] 1. Mark information provided corresponding to each information of an information recording medium such as a microfilm is guided through a plurality of light guiding optical fibers to a photoelectric conversion means corresponding to the light guiding optical fibers. In an image reading apparatus that detects by photoelectric conversion, a fiber group in which a predetermined number of positioning fibers of the same diameter are interposed between the light guiding optical fibers and closely arranged in a line, and a length for inserting the fiber group An image reading apparatus comprising a fiber holder having a hole and an integrated structure. 2. The image reading apparatus according to claim 1, further comprising an index portion on an extension line of the elongated hole portion of the fiber holder in a fiber arrangement direction. 3. The image reading device according to claim 2, wherein the fiber holder is formed of a flexible member by integrally forming the elongated hole portion and the index portion.