JPH08237449A - Image input device - Google Patents

Abstract

PURPOSE: To improve the operability of angle adjustment operation for an image of an original by making an original holder up of an original support member placing and fixing an original and up of a frame member supporting the original support member turnably. CONSTITUTION: A film holder (original holder) 2 is made up of a frame member 41 forming the outer shape and a turntable (original hold member) 42 held turnably freely in the middle of the frame 41. Angle indication 54 is provided to an outer circumference of the turntable 42 and an angle scale 55 is formed to the frame 41 over the entire circumference respectively. Furthermore, a plotting scale 56 is provided around the turntable 42 of the frame 41. Slide parts 50, 51 at the position on the left and right sides of the turntable 42 are formed stepwise and scales in compliance with the plotting scale 56 are formed. A glass plate is fixed to the upper face of the turntable 42 and a mask in response to the film size is fixed thereto.

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 of a film original or the like.

[0002]

2. Description of the Related Art A so-called scanner is known as an image input device for reading an image of a film original or the like.

Scanners are roughly classified into a two-dimensional type by moving a reading unit with a document fixed and moving the reading unit two-dimensionally, and by moving a document with the reading unit fixed and moving the document two-dimensionally. It is divided into a moving original type for reading.

In the case of the movable reading unit, an original is placed on a fixed original plate called a platen, and a cover is placed on the original for reading. Depending on the image of the original, the inclination of the image to be read, for example, the horizontal line of the photograph is not preferable and adjustment is required. In this case, the cover is opened to adjust the angle and position of the original, and the cover is closed again to read the original.

In the case of the moving original type, the original is placed on a moving stage and fixed by a cover or the like to read it. When it is necessary to adjust the angle of the image, it is necessary to remove the cover or the like and place the original on the stage again.
There are also stages that have an angle adjustment mechanism, and in this case, a command from a computer, etc.
The adjustment operation was being performed.

[0006]

In the image input device constructed as described above, in order to adjust the angle of the read image, it takes time and effort to open the cover and wake up the original again. In addition, the accuracy of the adjustment is insufficient, trial and error are required, and there is a concern that the adjustment must be repeated many times. Further, when the stage itself has a built-in stage angle adjusting mechanism, the image input device itself becomes large and expensive.

The present invention has been made in view of the above situation, and an image capable of improving the workability of adjusting the angle of an image of a document while realizing the downsizing and cost reduction of the image input device. An object is to provide an input device.

[0008]

In the image input device of the present invention, an original document holder (eg, film holder 2 in FIG. 4) on which an original document (eg, film 17 in FIG. 4) is placed is mounted and an image of the film 17 is attached. In the image input device that reads
The film holder 2 includes a document holding member (for example, the turntable 42 in FIG. 1) on which the film 17 is placed and fixed, and a frame member (for example, in FIG. 1) that rotatably holds the turntable 42.
Frame 41) of the above.

[0009]

In the image input device having the above structure, by rotating the turntable 42 on the frame 41,
The angle of the film 17 placed and fixed on the turntable 42 can be easily adjusted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image input device of the present invention will be described below with reference to the drawings.

1 to 4 show the configuration of an embodiment of the present invention. FIG. 4 shows an internal schematic configuration of an example of an image input device using a film holder which is a feature of the present invention.

In FIG. 4, the case 1 is formed in a box shape, and an insertion opening 3 for inserting and removing the film holder 2 is provided on one front surface of the case 1. A door 5 that rotates around an axis 4 is attached to the insertion port 3.
The inside of the case 1 is composed of almost three layers, and an illumination unit 6, a document scanning unit 7, and an image forming unit 8 are arranged in this order from the top.

The illumination unit 6 includes a light source 9 such as a halogen lamp arranged on the right side in FIG. 4, a heat ray absorption filter 31, a diffusion plate 10, a color filter 11, and a first condenser lens 1.
2, a first mirror 13, a second mirror 14, a third mirror 15, a second condenser lens 16 and the like. Then, the light emitted from the light source 9 has its optical paths bent at right angles by the first, second, and third mirrors 13, 14, and 15, and irradiates the surface of the film 17 in a right angle direction. Therefore, since the optical path is folded and arranged parallel to the surface of the film 17, the illumination unit 6 has a thin structure.

The original scanning unit 7 is composed of a film holder 2, a stage 18, a drive mechanism 21 including a lead screw 19 and a stage motor 20, and the like.
9 and the stage 18 are arranged parallel to the optical path of the illumination unit 6.

The image forming unit 8 includes a mirror 22, a lens 23 and C.
It is composed of a CD 24 or the like, and the optical path reflected by the mirror 22 is arranged parallel to the optical path of the illumination unit 6. The image on the film 17 is read by a line CCD
24, the illumination area on the film 17 may be linear corresponding to the CCD 24, and Fresnel-type condenser lenses 12 and 16 and the mirror 1 constituting the illumination unit 6 may be used.
Since 3, 14, and 15 may also be linear, the optical path of the illumination optical system can be folded and arranged as described above, and the thin illumination unit 6 can be configured.

Further, at the lower left side of the case 1 in FIG.
An air intake hole (not shown) is formed at a position facing the CD 24, and an exhaust fan 25 is provided above the right side of the case 1 in FIG.

Next, the reading operation, the insertion and ejection of the film holder 2 will be described. When the film holder 2 is not inserted, the stage 18 of the main body of the image input device is at the insertion standby position of the film holder 2. The stage 18 is moved to the left of the position shown in FIG.

After setting the film 17 on the film holder 2, the film holder 2 is inserted through the insertion opening 3 and fixed on the stage 18. Door 5 attached to insertion slot 3
Is interlocked counterclockwise in the drawing as the film holder 2 is inserted (moved to the right in FIG. 4). When the loading operation of the film holder 2 is completed, the stage 18 moves to the reading start position and the door 5 closes. Although details of the door closing operation are not shown, for example, use of gravity, coil spring,
It is realized by using an appropriate force such as a torsion spring, a leaf spring, an electromagnetic force of a solenoid or a motor.

The stage 18 is driven by a drive mechanism 21 to move to the right, and a sub-scan for reading an image on the film 17 is performed. On the other hand, the light source 9 is turned on and the reading position of the film 17 is illuminated by the illumination unit 6.
The light transmitted through the image on the film 17 is focused on the CCD 24 via the mirror 20 and the lens 23, and the image of one line is read. By repeating the reading operation in the main scanning direction while sequentially moving in the sub scanning direction, that is, the moving direction of the film 17, an image on the film 17 can be two-dimensionally input.

In this way, the image of the film 17 is CC
The image signal is read by D24, photoelectrically converted, and the image signal is input to an image processing unit (not shown). The color filter 11 is provided with filters of three colors of red, blue, and green, and a color image can be input by alternately irradiating the same image.

The lens 23 and the CCD 24, which is a line-type image sensor, are fixed and held on the image forming portion supporting member 26 at a constant interval, and the image forming portion supporting member 26 is driven by a focusing drive mechanism 27. To be done. The focusing drive mechanism 27 includes a lead screw 28 that is screwed onto the imaging unit support member 26, a focusing motor 29 that rotates the lead screw 28, a guide bar (not shown) that guides the lens 23 and the CCD 24 in the optical axis direction. ) And a guide member (not shown).

In the image processing unit (not shown), in addition to the image input processing, processing such as automatically performing the focusing operation while driving the focusing driving mechanism 27 to perform contrast calculation is performed.

During the operation of the above image input device, heat is generated by driving the stage motor 20, turning on the light source 9, and the power source 30 for driving the circuit. However, after the outside air is sucked in through an air intake hole (not shown) arranged near the CCD 24 below the case 1 and absorbs heat generated from the stage motor 20, the light source 9, the power source 30, etc. in the case 1, Since it is discharged to the outside by the exhaust fan 25, C
It is possible to prevent the ambient temperature of the CD 24 from rising.

The discharging operation of the film holder 2 is performed in the stage 1.
8 is moved to the left. When the stage 18 moves to the left and reaches the insertion standby position, the rear end of the film holder 2 drives the door 5 around the shaft 4 to release the film holder 2 from the stage 18 and move it in the discharge direction.
Since the rear end of the film holder 2 is exposed to the outside of the insertion opening 3, it can be taken out. When the film holder 2 is pulled out, the door 5 is driven by gravity or the like to close.

The details of the film holder 2 will be described below. The film holder 2 is composed of a frame 41 forming its outer shape and a turntable 42 rotatably held in the center of the frame 41. The film holder 2 is formed in a rectangular thin plate shape having partial cutouts on the left and right of the front end (upper side in FIG. 1) in the insertion direction. The left and right cutouts 43, 44 have an asymmetrical shape.

A groove portion 45 is provided on the front side (lower side in FIG. 1) of the frame 41 in the insertion direction for facilitating insertion and removal operations. On the left and right in the insertion direction, the cutouts 43 and 44 are followed by slopes 46 and 47 and the positioning hole 4
8 and 49, and sliding portions 50 and 51 formed in a convex shape are provided. A claw portion 52 as a locking member that rotatably locks the plurality of turntables 42 is formed around the turntable 42 on the frame 41, and the turntable 42 is rotatably held on the frame 41. hand,
Even if it is upside down, it will not come off. An opening 53 is formed on the lower surface of the turntable 42 of the frame 41 as shown in FIG.

An angle index 54 is provided on the outer periphery of the turntable 42 every 10 degrees, and an angle scale 55 is provided on the frame 41.
Each is provided over the entire circumference. A grid scale 56 is provided around the turntable 42 of the frame 41. The slide portions 50 and 51 at the positions corresponding to the left and right of the turntable 42 are formed in a step-like shape and have a scale according to the grid scale 56.

As shown in FIG. 2, an opening 57 is formed in the bottom of the turntable 42, a glass plate 58 is fixed to the upper surface of the opening 57, and a mask 59 corresponding to the size of the film 17 shown in FIG. 3 is formed. It is installed. The mask 59 is positioned by the shaft 60 shown in FIG. 1 and can be replaced according to the size of the film 17. As shown in FIG. 3, a hinge 61 and a frame member 6 are provided at one end of the turntable 42.
A glass plate 63 is supported via 2 to be openable and closable.
The frame member 6 of the glass plate 63 is provided on the other end of the turntable 42.
A pressing member 65 for locking the second end portion 64 is provided.

In order to load the film 17 into the film holder 2, first, the pressing member 65 of the film holder 2 is displaced to open the front end portion 64 of the frame member 62 of the glass plate 63. The mask 59 on the glass plate 58 is replaced with a mask corresponding to the size of the film 17, and the film 17 is placed in alignment with the alignment section 66 provided on the mask 59.
The frame member 62 integrated with the glass plate 63 is closed, and the pressing member 6
Fix at 5. The film 17 is held by being sandwiched between the two glass plates 58 and 63 on the mask 59, and the flatness is maintained. The film 17 as a transparent original is formed of glass plates 58, 6
It is sandwiched by 3 and can be observed in the frame member 62 and the openings 53 and 57, and can be read by a scanner as an image input device.

The mask 59 is for suppressing the influence of light from a portion without an image so as to obtain good read data without so-called fog. If the mask 59 is not used, the alignment section 66 cannot be used, but the film 1
The position and angle of 7 can be positioned using the grid scale 56 and the angle scale 55 of the frame 41.

The image read by the image input device can be confirmed on a monitor via a computer or the like, and the deviation of the image from a predetermined angle can be calculated. The orientation of the image can be adjusted by ejecting the film holder 2 from the image input device and rotating the turntable 42 with reference to the angle index 54 and the angle scale 55. Film holder 2 again
When the image data is inserted into the image input device and the reading operation is performed, the image data of the desired angle can be obtained.

Also, from the image input device to the film holder 2
Is discharged and placed on a light table, for example, and the turntable 42 is rotated with reference to the grid graduation 56, so that the inclination of the horizontal line is adjusted when the horizontal line of the sea is reflected on the film 17, for example. be able to. In this embodiment, the user can adjust the inclination of the image while looking at the document, which facilitates the adjustment.

Although the image input device and the document holder that handle the film 17 as the transparent document have been described so far, it goes without saying that the invention can also be applied to a reflective document. The present invention can be applied not only to the moving-image-type image input device but also to the moving-image-reading-unit image reading device in which a document holder is placed on the platen of the fixed reading unit to perform reading.

[0034]

As described above, according to the image input apparatus of the present invention, it is possible to easily rotate the document. Further, if the read data is confirmed on the monitor and the necessary rotation angle of the image is calculated, the angle can be accurately determined. Further, since it is not necessary to prepare a stage rotating mechanism in the image input device, the device can be downsized and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a film holder provided in an embodiment of an image input device of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view for explaining a method of using the film holder of FIG.

FIG. 4 is a vertical cross-sectional view showing the schematic internal structure of an image input device using the film holder of FIG.

[Explanation of symbols]

 2 Film Holder (Original Holder) 17 Film (Original) 41 Frame (Frame Member) 42 Turntable (Original Holding Member) 52 Claw (Locking Member) 54 Angle Index 55 Angle Scale 56 Grid Scale

Claims (4)

[Claims] 1. An image input device for mounting an original document holder on which an original document is mounted and reading an image of the original document, wherein the original document holder mounts and fixes the original document, and rotates the original document holding member. An image input device comprising: a frame member that is held as much as possible. 2. An outer circumference of the document holding member is formed concentrically, an angle index is provided on the outer circumference, and at least a part of the inner circumference of the frame member is slid on the outer circumference of the document holding member. The image input device according to claim 1, wherein the image input device is formed in a concentric shape that is movably fitted, and an angle scale is provided on the inner circumference. 3. The image input device according to claim 1, wherein a grid scale is provided on a peripheral portion of the document holding member of the frame member. 4. The image input device according to claim 1, wherein a locking member that locks the document holding member rotatably is provided on the frame member.