JPH07115519A - Image input device - Google Patents

Abstract

PURPOSE:To reduce the time required for output adjustment by providing an opening not choked by an original entirely, passing a read light to the opening so as to adjust an output of a read means thereby reducing a moving time of a carrier means. CONSTITUTION:Even when a film mount is completely inserted to a carriage 15 and a rack carriage 16, an opening 15a whose size cannot choke the film mount is provided to the device. Thus, even when the film mount is completely inserted, a space 34 is formed adjacent the film mount. Shading is corrected by moving the carriage 15 so as to pass a read light to the space 34. Since the space 34 is not choked even when the film mount is inserted or the film mount is ejected during shading correction, the shading is surely corrected. Then the moving time of a carrying means is reduced and the time required for output adjustment of a read means is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for reading an image original such as a photographic film with transillumination.

[0002]

2. Description of the Related Art An image input device is roughly divided into an illuminating section as an illuminating means for guiding illuminating light onto a transparent original, a scanning section having a carriage as a holding means for holding and moving the transparent original, and an original from the original. It is composed of a projection unit as a reading unit for forming an image of the transmitted light of the above on a line sensor (CCD). The light from the illumination unit is condensed into a linear shape on the transparent original, and after passing through the original, an image is formed on the CCD, which is read as one line data. After the reading of one line is completed, the scanning unit moves by one line to change the position of the transparent original, and the reading is performed again. Scanning for one screen is performed by repeating such reading and movement a plurality of times.

As a conventional image input apparatus having the above-mentioned structure, as described in JP-A-3-145881, a film insertion opening into which a film as a transparent original is inserted is formed on the surface. A configuration is known that includes a support, a conveying unit that conveys a film in a reciprocating manner from the film insertion opening to the back, and an optical reading unit that has at least a part having an optical axis orthogonal to the conveying direction of the conveying unit. is there.

In this conventional image input device, as shown in FIG. 5, a transmission window 36 is provided in the conveying means, and the read light is passed through the transmission window 36 to adjust the output of the reading means (shading correction). I am trying.

[0005]

However, since the transmissive window 36 is provided in the transport means, the transmissive window 36 and the film as the transmissive original are arranged at a distance from each other. Therefore, as preparation for adjusting the output of the reading unit (shading correction), it is necessary to move the transport unit to a position where the reading light passes through the transmission window 36.

The present invention has been made in view of such circumstances, and an object thereof is to shorten the time required for adjusting the output of the reading means by shortening the moving time of the conveying means.

[0007]

In order to achieve the above object, the present invention provides a light irradiation optical system for irradiating an original with a reading light, and a reading means for forming an image of the original by forming a transmitted light of the original. A document holding means for holding a document and moving it back and forth;
The document holding means has a reciprocating movement guiding means for guiding the reciprocating movement of the document holding means, and the document holding means has an opening portion of a size that does not block the document. Is configured to adjust the output of the reading means.

[0008]

In the image input apparatus having the above-mentioned structure, the output of the reading means is adjusted by passing the reading light through the aperture portion where the document is not blocked, so that the moving time of the conveying means can be reduced. Therefore, it is possible to shorten the time required to adjust the output of the reading unit.

[0009]

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

FIG. 1 is a perspective view showing an embodiment of an image input device according to the present invention. FIG. 2 is a sectional view showing an embodiment of the image input device according to the present invention.

In FIG. 1, the main body of the image input apparatus scans the film by moving an illuminating optical section as an illuminating means for guiding the illuminating light onto a film as a transparent original and a carriage as a holding means for holding the film. It is composed of a scanning unit and a projection optical unit which forms an image of the transmitted light from the film on a CCD and reads it, and is housed in a housing.

As shown in FIG. 1, the housing is made of a die-cast aluminum body 1, an aluminum upper cover 2 that covers the upper portion of the body 1, and a polycarbonate front panel that covers the front surface of the body 1. 3 and 3. Further, a main body 5 and a mechanical body 4 for accommodating an image reading system including a scanning unit, an illumination optical unit, and a projection optical unit are screwed to the body 1. Further, the front side of the upper cover 2 is locked to the front panel 3, and the rear side is fixed to the body 1 with a screw (not shown). The upper cover 2 and the front panel 3 cover the image reading system.

The main board 5 (FIG. 2) and the mechanical body 4 are connected by four sets of harnesses 6, and the front panel 3
Is provided with an insertion opening 7 for inserting a film mount and an LED window (not shown) for displaying a status. In addition, from the front panel 3, the manual focus cam 27
A part of the outer periphery of the is protruding (Fig. 1), and the focusing operation can be performed from the front side. Front panel 3
The eject button 19 also protrudes from the
It is possible to eject the film mount inserted in. Further, the surface of the body 1 on the opposite side (back side) from the front panel 3 has a large opening so that it can be connected to various connectors provided on the main board 5.

The scanning unit is composed of a carriage unit having a film mount holding and moving mechanism and a film focus adjusting mechanism, and a motor unit having a power transmission mechanism for transmitting a motor driving force to the carriage unit. The motor portion is composed of a step motor 11 (FIG. 1) and a reduction gear 14a (integrated with the pinion gear 14) that reduces the rotation of the step motor 11, and is fixed to a motor mounting plate (not shown). The motor mounting plate is screwed to the mechanical body 4.

The step motor 11 rotates the motor gear 13 press-fitted into the motor shaft, and rotates the pinion gear 14 via the reduction gear 14a. Here, the step motor 11 rotates 0.9 degrees per step corresponding to one line of the image.

The carriage portion is composed of a carriage 15 and a rack carriage 16 that are integrally opposed to each other with a predetermined gap therebetween. One end is fitted in the groove portion of the mechanical body 4 and the other end is fitted in the focus block 25. It is movable by being guided by a pair of parallel guide bars 17. In addition, the carriage 15 and the rack carriage 1
Two film pressing springs 18 are fixed to the opposite ends of the surface facing the carriage 6, respectively.
The film mount inserted between 6 contacts.

By balancing the urging forces of the film pressing spring 18, even if film mounts having different thicknesses are inserted between the carriages 15 and 16, the film mounts are always mounted on the carriage 15 and the rack carriage 1.
Located in the center between 6 and 6. Since the centers of the carriage 15 and the rack carriage 16 are in the optical focus position, focus adjustment can be omitted if the emulsion surface of the film is located at the center of the mount even if the mount thickness is different.

The rack carriage 16 is integrally formed with, for example, a beveled tooth rack 16a of a module 0.3 in parallel with the moving direction, and a pinion gear 14 is meshed with the beveled tooth rack 16a to allow the step motor 11 to drive the gear. Driving force is transmitted, whereby the carriage 15 and the rack carriage 16 are moved.

Next, the film mount removing mechanism will be described. As shown in FIG. 2, the front panel 3 has a film mount insertion opening 7 which is hollowed from the vertical direction to a position where the film mount can be picked up with a finger. Since the carriage portion of the film mount storage portion always returns to the carriage return position III (FIG. 2) at the time of inserting the film and after reading the image data, the shape of the film mount insertion opening 7 of the front panel 3 is shown in FIG. At the carriage return position III, as shown in (3), by pulling the front panel 3 deeper than the tip position of the carriage portion, the film mount can be taken out with a finger without an eject mechanism.

Further, by making the gouging shape of the front panel 3 in conformity with the shape of the finger, the gouging shape can be made small and the internal space can be effectively used.
In addition, as shown in FIG. 2, even if the insertion opening 7 cannot be gouged up and down due to the internal space, one of the top and bottom should be gouged to the back and the other should be gotten to the position where the film mount touches. You can easily remove the film mount with your fingers.

As shown in FIG. 2, the illumination optical section includes an illumination base 36, an LED block 37, and a toric mirror 3.
It is composed of an 8- and 40-degree mirror 29 and an illumination system lid 40, and the whole is screwed to the mechanical body 4 with a screw.

The LED block 37, which is a light source, is fixed on the illumination base 36 via an insulating sheet with an insulating collar and screws. The toric mirror 38 is rotatably attached to the illumination base 36 about a cylindrical protrusion provided on the side surface, and is fixed with a screw after adjusting the angle.
The 40-degree mirror 39 is adhesively fixed to the bent portion formed on the illumination base 36. The illumination system lid 40 is an LED
The block 37, the toric mirror 38, and the 40-degree mirror 39 are fixed via two locking portions formed on the illumination base 36 so as to cover them. Furthermore, 4
A slit for passing the illumination light toward the film mount is provided on the 0-degree mirror 39. It should be noted that the illumination system lid 40 blocks external light entering the interior of the illumination optical system.

As shown in FIG. 2, the projection optical section is composed of a 45-degree reflecting mirror 41, a projection lens 42, a CCD 43, and a projection system lid 44, and the mechanical center body 4 is divided into three parts by a wall at the bottom center. It is located in the designated area. Four
The 5 degree reflection mirror 41 is fixed to the mechanical body 4 by adhesion. The projection lens 42 is composed of 6 lenses in 4 groups and is symmetrical, and is fixed to the lens chamber by a separation ring and a pressing ring, and the lens chamber is fixed to the mechanical body 4 by a set screw. The CCD board 45 on which the CCD 43 is mounted is
It is screwed to the mechanical body 4 via the CCD holder 46. Further, a projection system lid 44 is screwed to the outer periphery of the part partitioned by the wall.

The light transmitted through the film original is converted by the 45 ° reflection mirror 41 in the optical path by 90 °, and thereafter, is imaged on the CCD 43 by the projection lens 42. Also, C
The CD holder 46 also functions as a light shield and a dust proof. Further, the projection system lid 44 also plays a role of shielding light and dust from the entire projection optical section, and guide bar 17 of the scanning section.
Also serves as a presser foot.

Next, the shading correction will be described. As shown in FIG. 3, a transparent space 34 exists between the film mount and the edge detection plate 32.
This space 34 is ensured by providing the carriage 15 and the rack carriage 16 with an opening 15a having a size that does not block the film mount. This state is shown in Figure 4.
Enlarged to show. The inner limit of the film mount is limited by hitting the eject plate 12. When the eject plate 12 is not needed, the carriage 15 or the rack carriage 16 may be fixedly fixed.
That is, even if the film mount is completely inserted into the carriage 15 and the rack carriage 16, an opening portion 15a having a size that does not block the film mount is provided in the carriage 15 and the rack carriage 16. Therefore, even when the film mount is completely inserted, the film mount does not completely close the opening 15a and the space 34 is formed adjacent to the film mount.

Shading correction is performed by moving the carriage so that the reading light passes through the space 34. The space 34 is a space that is never closed even when the eject plate 22 moves to the eject position. By using this space 34 to perform shading correction, even if a film mount is inserted or an eject operation is performed during shading correction,
Since the space 34 is not blocked, the shading correction can be surely performed. Further, when reading a color original, for example, red, green, and blue lights are sequentially illuminated, and at this time, it is possible to measure the light amount level of each illumination light using this space 34 and adjust the color balance and the like. become.

As described above, since the space 34 is formed adjacent to the film mount, the time required to move the carriage 15 to the position where the reading light passes through the space 34 becomes almost unnecessary.

[0028]

As described above, according to the present invention, the output of the reading means is adjusted by allowing the reading light to pass through the portion of the aperture where the document is not blocked, and therefore the feeding means The moving time can be shortened, and thus the time required for adjusting the output of the reading unit can be shortened.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an image input device according to the present invention.

FIG. 2 is a side sectional view showing an embodiment of the image input device according to the present invention.

FIG. 3 is a top view showing an embodiment of the image input device according to the present invention.

FIG. 4 is a perspective view showing an embodiment of an image input device according to the present invention.

FIG. 5 is a perspective view showing an example of a conventional image input device.

[Explanation of symbols]

 1 Body 2 Top Cover 3 Front Panel 4 Mechanical Body 5 Main Board 6 Harness 7 Insertion Slot 13 Motor Gear 14 Pinion Gear 14a Reduction Gear 15 Carriage 15a Opening 16 Rack Carriage 16a Beveled Rack 17 Guide Bar 18 Spring 19 Eject Button 22 Eject Plate 25 Focus Block 27 Manual Focus Cam 29 40 Degree Mirror 32 Edge Detection Plate 34 Space 36 Lighting Base 37 LED Block 38 Toric Mirror 39 Degree Mirror 40 Illumination System Lid 41 45 Degree Reflection Mirror 42 Projection Lens 43 CCD 44 Projection System Lid 45 CCD Substrate 46 CCD holder

Claims (3)

[Claims] 1. A light irradiation optical system for irradiating a document with a reading light, a reading unit for forming an image of the transmitted light of the document to read an image of the document, and a document holding unit for holding the document and reciprocally moving the document. And a reciprocating movement guiding means for guiding the reciprocating movement of the document holding means, wherein the document holding means has an opening portion having a size that does not block the document, and the document opening means does not block the document. An image input device, characterized in that the read light is passed through a hole to adjust the output of the reading means. 2. An original inserting means for inserting the original into the original holding means in order to hold the original in the original holding means, wherein a portion of the opening which is not covered with the original is an original. The image input device according to claim 1, wherein the image input device is formed on the back side in the insertion direction. 3. A light irradiation optical system for irradiating an original with reading light, reading means for forming an image of the original by forming transmitted light of the original, and original holding means for holding the original and reciprocating it. And a reciprocating movement guide means for guiding the reciprocating movement of the document holding means, wherein the document holding means has one opening portion, and the opening portion is a region through which the light of the document passes. And an area through which light for adjusting the output of the reading unit passes.