JPH05316294A - Picture reader - Google Patents

Abstract

PURPOSE:To easily exchange illuminating means and to respond to the reading size of an original by detecting the presence of the attachment of the illuminating means and inhibiting the reading operation of pictures when the illuminating means is not attached. CONSTITUTION:Holes for setting detection are provided corresponding to film projecting window 3e at respective film carriers 3 and it is optically detected that a film 11 is appropriately set on a projecting optical path. Also, a transmission type photosensor 164 for detecting whether or not the carrier 3 is attached is incorporated in a film carrier holder 611 for holding the carrier 3. Then, when the carrier 3 is not attached to the sensor 164, a lamp control circuit 5 supplies a DC voltage for applying to a lamp to a lamp unit 41 and inhibits the reading operation of the pictures. In this case, the exchange of the lamps is facilitated by the similar control even when the kind of the lamp is different from the size of the original. Thus, convenient utilization is attained with the variable power operation of an optical system regardless of the size of the picture.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading device,
It is equipped with an illuminating means for illuminating an image of a document such as a film mounted on the document mounting portion, and a reading means for forming an image on the image capturing means and reading the image, and processing the read data of the image, a monitor, a printer, or the like. The present invention relates to an image reading apparatus which outputs the read image to a monitor and displays it on a monitor.

[0002]

2. Description of the Related Art Conventionally, it is known that an image of a document such as a film is illuminated while being imaged on an image pickup device by an optical system and the image is read. Japanese Unexamined Patent Publication No. 60-96068 and Japanese Unexamined Patent Publication No. 61-150458 show examples of such an image reading device. These are for reading an image by scanning an image with a CCD line sensor.

[0003]

By the way, when the original is a film, there are various sizes such as a 35 mm plate film, a 6 cm plate film, and a 4 × 5 in plate film, and each has a negative film and a positive film. ..

To read these images, a one-dimensional illumination system is adopted, and the image of the illuminated original is imaged on the entire surface of the image pickup device with the zooming operation of the optical system regardless of the difference in film size. It is conceivable to read it.

As a result, the image pickup device can be effectively used for any size film.

However, in this case, in addition to the variable power operation of the optical system, it is necessary to secure the amount of light incident on the image pickup device.

If one halogen lamp is used to achieve this amount of light for films of all sizes, in order to satisfy the total amount of light reaching the image pickup device by irradiating a 35 mm negative film having a small area. The amount of lamp light required per unit area is larger than that of a large-sized film.

To explain this concretely, in order to illuminate the maximum size, for example, a 4 × 5 inch film a shown in FIG. 19, a halogen lamp b having an effective light emission length L as shown in FIG. 19 is required. .. Reference numeral c is an image reading sensor, and d is an image forming lens for reading an image.

This halogen lamp b is shown in FIG.
When it is applied to the illumination of the mm plate film c, only the length L'of about 1/3 of the effective light emission length of the halogen lamp b can be used, resulting in energy loss of about 3/2 of the total light emission amount. It is an upper problem.

Moreover, in order to satisfy the total amount of light reaching the image pickup device d when illuminating the 35 mm plate film c, the amount of light emission required for the maximum size of 4 × 5 in plate film a is about 3 About twice as much is needed.

Therefore, this is a particular problem when the apparatus main body is liable to be read and a film which is vulnerable to heat is easily read. Further, in the case of the maximum size 4 × 5 inch plate film a which utilizes the entire effective light emission length L of the halogen lamp b,
This will be dealt with by inserting a filter for suppressing the amount of light in the optical path, and it is necessary to control an extra member and the use / non-use of the extra member. Further, the amount of light is suppressed, which is not preferable in terms of energy saving.

Therefore, it is conceivable to replace the illuminating means with one suitable for the film size so that it can be used.

However, when the lighting means is replaceable, it is conceivable that the image is read without mounting the lighting means. In this case, the image reading data becomes a black solid image, the reading of the image becomes useless, and it is difficult to deal with it because it is not clear whether there is a cause in the film image or in the illumination system or other causes.

Further, such a thing is apt to occur not only when the illuminating means is performed for each size of the read image, but also when simply replacing the illuminating means with a new one.

The present invention provides an image reading apparatus which can replace the illuminating means for convenience, and at the same time can be used without problems due to the replacement, and can solve the above-mentioned conventional problems. Is an issue.

[0016]

In order to achieve the above-mentioned object, the present invention provides an illuminating means for illuminating an image of an original mounted on an original mounting portion, and an image forming means for forming the image on the imaging means. In an image reading apparatus equipped with a reading means for reading, the illuminating means is provided so as to be interchangeable depending on the reading size of a document, and a means for detecting whether or not the illuminating means is attached and an illuminating means are attached. If not, a control means for prohibiting the image reading operation is provided.

The image reading means is a means for forming an image on the entire area of the imaging means and reading the image regardless of the size of the image with the zooming operation of the optical system. And a means for detecting the size of the read image of the original document and the type of the illumination means. When both the original document and the illumination means are mounted, the control means is an optical system according to the size of the read image of the original document. The variable magnification operation can be performed.

In this case, the control means may display a message prompting replacement of the illumination means when the type of the attached illumination means does not correspond to the size of the read image of the attached document. it can.

Further, the control means may permit the reading of the image when the size of the read image of the mounted original and the kind of the mounted illumination means correspond appropriately.

Further, the image reading means is adapted to form an image on the entire area of the image pickup means and read the image regardless of the size of the image with the zooming operation of the optical system. It is also possible to allow the reading of the image when it corresponds to the size of the read image of the loaded document or corresponds to the size larger than that.

[0021]

According to the above construction of the present invention, the illuminating means is used by replacing the illuminating means with an effective luminescence length and total luminescence amount corresponding to the reading size of the original, or by replacing it with a new one, and illuminates the original appropriately to display an image. The reading means can be successfully achieved, and if the lighting means is not installed, the control means prohibits the reading of the image based on the detection of the lighting means, so that the lighting means can be replaced. It is possible to prevent the image reading due to the fact that the illumination means is not attached.

The apparatus further comprises means for detecting the presence / absence of the mounted original, and means for detecting the size of the read image of the mounted original and the type of the illuminating means, and the control means mounts both the original and the illuminating means. In this case, if the magnification changing operation of the optical system is performed according to the size of the read image of the document, the image reading means is able to perform the magnification changing operation of the optical system regardless of the size of the image and the entire area of the image pickup means. When an image is formed and read, the image reading corresponding to the size of the image worn by the user as a reading target is performed with priority over the type of the illumination means, and the size of the image reading intended by the user may be excessive or insufficient. It is possible to prevent the occurrence of defects or non-image areas in the read image itself.

In this case, when the control means does not correspond to the size of the read image of the mounted original on the type of the installed illumination means, the control means displays a message prompting replacement of the illumination means. When the image reading corresponding to the size of the image is performed with priority over the type of the lighting unit, the effective lighting length of the lighting unit and the total light emission amount are excessive or insufficient because the lighting unit does not support the image reading size. It is possible to prevent the image from being read as it is.

Further, if the control means permits the image reading when the size of the read image of the mounted original and the type of the illuminating means mounted appropriately correspond, the reading of the original is possible. It is possible to solve the problems of image reading failure and illumination loss of the illumination unit when the size of the image and the type of illumination unit are different.

Further, the control means permits the reading of the image when the type of the illuminating means mounted corresponds to the size of the read image of the mounted original or a size larger than that. With this configuration, when the image reading unit forms an image on the entire area of the image pickup unit and reads the image with the zooming operation of the optical system regardless of the size of the image, the effective light emission length of the illumination unit is insufficient, which is fatal. It is possible to prevent only the reading of the image when the reading failure is likely to occur.

[0026]

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

The present embodiment shows the case of a color image reading apparatus adapted to read an image on a color film. The image reading data is variously processed and input to an external device, for example, a digital copying machine, and based on the above processing. It is used for obtaining various copied images.

FIG. 1 shows a schematic configuration of the apparatus of this embodiment as seen from the front. As shown in FIG. 1, a color CRT 2 for displaying a read image and performing various processing operations is provided on an upper part of an apparatus main body 1 for reading an image and processing a signal.

The film 11 to be used for image reading is held on the film carrier 3 and loaded in the film carrier holder 611 shown in FIG. 1 in the direction of arrow a to be used for image reading.

The film carrier holder 611 can be movable together with the film carrier 3 in the direction of arrow b. As a result, the film 11 is 35 mm
A predetermined frame in the case of a continuous film of a plate can be aligned on the projection optical path for image reading.

The lamp unit 41 for illuminating the image on the film 11 is provided with a front door 62 of the apparatus body 1.
1 is opened and inserted into the apparatus main body 1 from the front side to the back side so as to be replaceably mounted.

The opening / closing of the front door 621 is detected by a switch 622, and the switch 622 is turned off when the front door 621 is opened. As a result, the power of the apparatus main body 1 is turned off.

FIG. 2 shows a schematic structure of the image reading apparatus when the apparatus main body 1 is viewed from above. In the image reading apparatus of this embodiment, a film 11 for reading an image and a color CCD sensor 112 for reading a film image are fixed 1.
Dimensional line lighting system is adopted.

Therefore, in order to read the data in the sub-scanning direction, the illuminating unit 113 and the first, second and third mirrors 12, 13 and 14 reciprocate.

In FIG. 2, the illumination unit 113 and the first, second, and
Each third mirror 12, 13, 14 is shown in solid line at the scan start position.

The color image reading apparatus in this embodiment also illuminates films 11 of different sizes and projects the transmitted light onto a predetermined size portion of the color CCD sensor 112,
In order to read an image by utilizing the resolution of the color CCD sensor 112, the color C of the optical system is changed depending on the film size.
The image forming magnification on the CD sensor 112 is changed so that an image of any size is formed on the entire area of the color CCD sensor 112.

Specifically, in the case of a 35 mm plate film, x
2.550, x 0.947 for 6 cm film
In the case of a 4 × 4 × 5 inch film, it is × 0.5734.

However, this is the case where the short side direction of the film 11 is the main scanning direction of the color CCD sensor 112.

The optical magnification is changed by changing the conjugate length. Since this is known, it will not be described in detail, but the second and third mirrors 13 and 14 and the imaging lens 15,
This is done by changing the positions of the lens rearview mirrors 16 and 17.

Unlike the change of the optical magnification, the data scaling process is performed by making the scanning speed variable in the sub-scanning direction and electrically processing the data in the main scanning direction.

The relationship between the film 11 and the positions of various components will be described. The illumination unit 113 and the first mirror 12 are integrally held by the lamp slider 631 and reciprocated by the first scanner motor 632 which is a stepping motor. When driven, the image on the film 11 is scanned during forward movement and is sequentially projected onto the color CCD sensor 112.

SH0 is the illumination unit 113 and the first mirror 1.
2 is a photo sensor for detecting the home position of No. 2.

The second and third mirrors 13 and 14 are integrally held by a mirror slider 633, and are reciprocally driven by a second scanner motor 634 which is a stepping motor for correcting the conjugate length. Prevents the optical path length from changing.

The positions of the second and third mirrors 13 and 14 at the start of scanning for each film size are, as shown in the figure, the solid line position in the case of the 35 mm plate film, 6
In the case of the cm plate film, it is the position of the one-dot chain line, and in the case of the 4 × 5 in plate film, the position of the two-dot chain line.

Each of these positions is provided by a photo sensor SH35,
It is detected by SH60 and SH45, respectively.

The imaging lens 15 is held by a lens slider 635, and a lens motor 63 which is a stepping motor.
It is reciprocally driven by 6 to perform the magnification change. Positioning control of the imaging lens 15 includes a 35 mm plate film and 6
The same position shown by the solid line in FIG. 2 may be used for the cm plate film, and the position shown by the alternate long and short dash line is set only for the 4 × 5 in plate film.

The respective positions of the imaging lens 15 are detected by the photosensors SL35 and SL45.

The lens rearview mirrors 16 and 17 are integrally held by a mirror stider 637 and reciprocally driven by a mirror motor 638 which is a stepping motor.

The lens rearview mirrors 16 and 17 are 35 m long.
For the m-plate film, the position shown by the solid line in FIG. 2 is set so as to cooperate with the lens back fixed mirror 18, and 6c
For m plate and 4 x 5 in film,
It is located at the position indicated by the alternate long and short dash line so as to operate independently of the fixed mirror 18.

For this reason, the lens back fixed mirror 18 used for image reading of the 35 mm plate film is fixed at the position shown by the solid line in FIG. 2, and the lens back mirrors 16 and 17 that have reached the solid line position for reading the 35 mm plate film. Located in its optical path, but with a 6 cm plate film and 4x
The lens rear-view mirrors 16 and 17 that have reached the position indicated by the alternate long and short dash line in the 5-inch film reading are deviated from the optical path.

The control positions of the lens rear-view mirrors 16 and 17 are detected by photosensors SM35 and SM45.

Immediately before the color CCD sensor 112, 4
A filter unit 25 equipped with types of filters 21, 22, 23, 24 is provided.

The filter section 25 is provided with a light amount to the color CCD sensor 112, R,
It has the function of matching the balance of G and B.

The filter 21 is a filter inserted during an actual operation of reading an image on a negative film, and is, for example, L.
B100 or the like is used.

The filter 22 is a filter inserted during an actual operation of reading an image on a positive film, and is, for example, N.
A D filter or the like is used.

The filter 23 is a filter inserted when the shading correction data of the negative film is taken in.

The filter 24 is a filter inserted when the shading correction data of the positive film is fetched.

The reason why the filter is divided between the actual operation and the time of capturing the shading correction data is that there is no film at the time of capturing the shading correction data.
This is because the amount of light and the balance are different because the film is present during actual operation, and this is corrected.

The filter switching operation of the filter unit 25 is performed by a stepping motor (not shown) in the same manner as in the case of the mirror or the like.

As an auxiliary mechanism for this purpose, a photo sensor 26 for detecting the right limit position and a photo sensor 27 for detecting the left limit position of the filter moving range are provided.

When the filter section 25 is provided in front of the color CCD sensor 112, the filters 21, 22, 23 and 24 are set to the minimum size which is almost equal to that of the color CCD sensor 112, and a margin necessary for this is provided. The filter unit 25 can be small.

The illumination unit 113, as shown in FIGS.
It is composed of a replaceable lamp unit 41, an optical path folding mirror 42, a heat insulating filter 43 shown in FIG. 3, and a kamaboko lens 44 having a light collecting surface and a diffusing surface on the front and back, which are shown in FIG. Lamp slider 631 as described above
The lamp unit 41 is held on the lamp slider 6 and
It can be smoothly attached and detached along the guide portion 631a of 31.

With the above structure, the film carrier 3 is mounted on the film carrier holder 611 located between the illumination unit 113 and the moving parts of the first, second and third mirrors 12, 13 and 14. The light from the lamp unit 41 is guided to the formed film 11 to illuminate it, and the image of the film 11 is colored C by the imaging lens 15.
An image is formed on the CD sensor 112.

In FIG. 4, the first scan motor 632 is shown.
A scan drive mechanism by is shown. To explain this, the first scan motor 632 is installed in the apparatus main body 1.
A base 641 having a holder is fixed, and the lamp slider 631 is slidably fitted to the left and right two guide blocks 642, and a screw shaft 643 directly connected to the first scan motor 632 is attached to one slide block 642. The first scan motor 632 rotates the screw shaft 643 in the normal direction or in the reverse direction by screwing the screw shaft 643, thereby moving the ramp slider 633 in the scan direction or the return direction.

Further, the film carrier holder 611 for receiving and supporting the film carrier 3 may be fixed in the apparatus main body 1, but as described above, it can be moved for frame alignment in the case of the 35 mm plate film. Is preferred.

The folding mirror 42 is a halogen lamp 45 which is set in the lamp unit 41 in a horizontal posture.
Is provided to guide the illumination light from the film to the film vertically arranged at a position higher than the lamp installation position.

The kamaboko lens 44 is provided to improve the light-collecting property, and compensates for the fact that the distance between the halogen lamp 45 and the film 11 becomes large due to the folding mechanism insertion by the folding mirror 42 and the light amount is reduced. Further, the diffusing surface is for making dust and the like attached to be inconspicuous on the projected image.

The lamp unit 41 has a box shape as shown in FIG. 5, and a light projecting window 46 is provided on the upper surface. This projection window 46 opens when the lamp 45 is attached,
A shutter 47 that closes when the lamp 45 is not attached is provided.

As shown in FIGS. 5 and 6, the lamp unit 41 includes a reflection shade 48 for directing light from the lamp 45 to the light projecting window 46, a temperature fuse 49, and the lamp unit 41.
Short line 50 with the ground to determine the type of
It has a connector 51 for making an electrical connection with the device body 1 when the lamp unit 41 is attached to the device body 1, and the appearance is common except for the connector 51.

The short line 50 is preset with a 2-bit code, and the CPU 200 shown in FIG. 11 shows the connection state of the two short lines 50 by the parallel I / O port 2.
From 06, data is taken in and identified.

The types of the lamp unit 41 are shown in FIG.
(A) mounted with a lamp 45a for 35 mm plate film, mounted with a lamp 45b for 6 cm plate film shown in FIG. (B), 4 × 5 shown in FIG.
There are three types, in which a lamp 45c for an in-plate film is mounted, and they are replaced as needed.

These lamps 45a to 45c are the film 1
As the size of No. 1 becomes larger, the effective light emitting section 45d becomes longer.

By the way, if the lamps 45 are commonly used, a huge number of W lamps 45 are required, and power is consumed more than necessary when the small-sized film 11 is projected. This is a particular problem when using the film 11 which has a low tolerance to temperature.

By changing the kind of the lamp 45 according to the size of the film 11 as described above, such a problem can be solved. However, each lamp 45a-4
5c is properly selected according to the size of the film 11,
Must be used.

In order to guarantee this, the kind of the lamp unit 41 mounted on the apparatus body 1 is automatically detected and dealt with as described above.

The film carrier 3 is shown in FIG. 8 (a), the film carrier 3a for 4 × 5 inch plate film, the film carrier 3b for 6 cm plate film shown in FIG. 8 (b), and shown in FIG. 8 (c). There are four types of film carrier 3c for 35 mm plate continuous film and film carrier 3d for 35 mm plate mount film shown in FIG.

The film carrier 3b for 6 cm plate film has a projection window 3e of 6 × 9 mm plate, and the size of the 6 cm plate film is 6 × 4.5, 6 × 6,
There are various types such as 6x7 and 6x9 so that they can be dealt with.

Each of the film carriers 3a to 3d has a front surface 2
A single holding plate is opened and closed with an upper hinge connection portion as a fulcrum so that the film 11 can be sandwiched and pulled out.

The film carriers 3a to 3d have the same outer dimensions, and the receiving conditions on the apparatus main body 1 side are unified to simplify the configuration on the apparatus main body 1 side and the attachment / detachment operation thereof.

There is a distinction between the film carriers 3a to 3d in which the position and number of the holes 61 for type detection are different from those in which the holes 61 are not provided. Due to this difference, the film 11 held by each is different. The type is detected optically.

Further, each film carrier 3a to 3d includes
Corresponding to each film projection window 3e, a set detection hole 62 for detecting each proper set position of the film carrier 3 is provided, and each film carrier 3a to 3d.
It is possible to optically detect that the film 11 held by is properly set on the projection optical path.

In the film carrier holder 611 for holding the film carrier 3, as shown in FIG. 9, transmissive photosensors 162 and 163 for detecting the type of the film carriers 3a to 3d, and the film carrier 3 are provided.
The transmissive photosensor 164 for detecting whether or not the a to 3d are attached is used as the film carrier holder 611.
The film carriers 3a to 3d to be mounted on are mounted so as to sandwich the film carriers 3a to 3d.

Further, in the vicinity of the position where the film carrier holder 611 of the apparatus main body 1 moves, each of the film carriers 3a to 3a mounted on the film carrier holder 611.
A transmissive photosensor 165 for detecting the set position state of d is provided so as to sandwich the film carrier holder 611.

As shown in FIG. 10, the color CRT 2 is a monitor display section 71 for displaying an image read from the film 11, setting a copy mode, and setting a trimming area.
In addition to the operation panel 72 for instructing the printing operation, it has an internal panel (not shown).

The monitor display section 71 mainly has the following display sections.

Image display area 81: The read film image is displayed.

Message display section 82; a warning when the size of the loaded film does not correspond to the type of the lamp unit 41, replacement of the lamp unit 41, necessary type of the lamp unit 41, film carrier 3 types, messages such as shading correction data acquisition display, film carrier pull-out display, etc. are displayed, and the type of film and output paper size are displayed.

The operation panel 72 mainly includes the following operation members.

Stop key 95: Instruct to interrupt copying or image input.

Image input key 96: Instructs to read a film image and display it on the color CRT 2.

Print key 97: Instructs to start copying.

FIG. 11 shows a block diagram of a circuit diagram around the CPU 200. CPU200 is program RO
The entire device is controlled based on the contents of the program stored in M201.

The following are mainly connected to the periphery of the CPU 200 by a CPU address bus and a CPU data bus.

EEPROM 202: Stores parameters for adjusting variations of individual devices, for example, set voltage for each type of lamp unit 41 corresponding to each film size. It is electrically readable and writable.

RAM 203: Stores variables necessary for executing the program.

Communication port 205: Exchanges information with external devices.

Parallel I / O port 206: Outputs a control signal for controlling a peripheral device or inputs a status signal of the peripheral device.

Input image memory 207; color CC
The image data read by the D sensor 112 is input through the image processing circuit 651, directly written, and stored.

AGDC 210: Controls the display of the color CRT 2 by controlling the contents of the VRAM 211.

The following are connected around the AGDC 210 by an AGDC bus and an AGDC data bus.

VRAM 211: Stores data relating to display control of the color CRT 2.

Kanji ROM 212: Generates kanji character data from kanji code.

Work RAM 213; VRAM 21
It is used as a work area when controlling the contents of 1.

The CPU address bus and the AGDC address bus, and the CPU data bus and the AGDC data bus are connected to each other via the AGDC 210.

FIG. 12 shows the main signal input / output unit centering on the parallel I / O port 206. The scanner motor drive circuit 301, the lamp control circuit 305, the lamp unit 41, the lens drive circuit 306, and the operation panel. 72,
The mirror driving unit 308 is connected.

The scanner motor drive circuit 301 is a CPU
A circuit for moving the first, second, and third mirrors 12, 13, 14 and the illuminating unit 113 at a predetermined speed in accordance with an instruction from 200, and each of the first and second scanner motors 632. 634 to control the ramp slider 6
31 and the mirror slider 633 are driven. For position control at this time, the photosensors SH0 and SH3 are used.
5, SH60, SH456 are connected so that position information can be obtained.

The scanner is controlled by the following signals.
Since it is a known one, its explanation is omitted.

Motor drive signal: Instructs the motor feed speed.

• Forward / reverse rotation signal: Instructs the rotation direction of the motor.

Scan home position detection signal: Indicates that the scanner is at the home position.

Regarding the film carrier detection, the type of the film carriers 3a to 3d is discriminated and the presence or absence of the film carrier 3 is detected, and the following signals are mainly used.

Carrier set signal: Indicates that the film carrier 3 is attached to the apparatus main body 1.

Film type detection signals 1 and 2; film 1 depending on the difference between the film carriers 3a to 3d set by the combination of the photo sensors 161 and 162
The type of 1 is determined.

The combination of the film type detection signals 1 and 2 and the type of the film 11 designated by the combination are shown in Table 1.

[0115]

[Table 1]

The lamp control circuit 305 controls the light amount and lighting of the lamp 45. The DC voltage applied from the lamp control circuit 305 to the lamp 45 is the lamp unit 4
1 is supplied.

The signals used for this control are as follows.

Output voltage setting signal: a signal for setting the voltage applied to the lamp 45, which is given as a 5-bit signal.

Lamp on / off signal; lamp 45
Controls turning on / off of.

Abnormality detection signal: An abnormality such as lamp burnout or abnormal lighting is detected.

As the lamp unit 41, it is necessary to select and use one that is compatible with the type of the film 11. For this reason, the lamp unit type detection signals 1 and 2 have been described above.

Is used.

Here, the lamp unit type detection signals 1, 2
Table 2 shows the relationship between the combination of No. 1 and the type of lamp unit 41 and the presence / absence of attachment.

[0124]

[Table 2]

The lens driving circuit 305 includes an imaging lens 15
The position is switched depending on the size of the film 11 used, and the lens position is controlled by the following signals.

Therefore, the lens driving circuit 305 is connected to the lens motor 635 and the photosensors SL35 and SL45 for detecting the lens position.

Positioning is based on management of the number of driving steps from the signal of the reference position detection sensor.

Driving signal: Controls driving and stopping of the lens driving motor.

Forward / reverse rotation signal: Designates the driving direction of the lens drive motor.

Position detection signal: Indicates that the lens is at the reference position.

The mirror driving section 308 changes the positions of the lens rearview mirrors 16 and 17 in order to change the image forming magnification of the optical system depending on the size of the film 11, and the positions of the lens rearview mirrors 16 and 17 are It is controlled by the following signals.

For this reason, the mirror driving unit 307 is connected to the mirror motor 638 and the photosensors SM35 and SM45 for detecting the mirror position.

Positioning of the lens rear-view mirrors 16 and 17 is performed by managing the number of driving steps from the signals of the respective reference position sensors.

Lens rear-view mirror drive signal: The lens rear-view mirrors 16 and 17 are driven and stopped.

Position detection signal: Indicates that the lens rear-view mirrors 16 and 17 are at the reference position.

Forward / reverse rotation signal: Instructing forward / reverse rotation of the lens rear-view mirrors 16 and 17 parts.

The parallel I / O port 206 has input / output signals for exchanging signals with the digital copying machine.

As the image processing circuit, although not shown, the following signals are exchanged with the copying machine separately from the communication line to transmit the image data.

Power-on signal: Indicates the power-on / off state of the printer unit.

Image data request signal: Indicates the transmission timing of the image signal.

Horizontal effective area signal: Indicates a printable area in the horizontal direction.

Vertical effective area signal: Indicates a printable area in the vertical direction.

Print wait signal: Indicates a state in which the image signal cannot be transmitted.

Selector switching signal: Instructs switching of the image signal in the image processing circuit.

By the way, if the lamp unit 41 is not attached, even if the image of the film 11 is read, it may be a black solid image, and the reading becomes useless, whether the image of the film is black or the illumination system. It is difficult to use because it is difficult to use because it is not clear whether or not the cause is.

Further, the mounted lamp unit 41
If the type does not correspond to the size of the mounted film 11, the halogen lamp 45 provided in the lamp unit 41 may have an excess or deficiency in the effective light emission length or the total light emission amount, which may cause a problem in reading the film 11. The illumination light is wasted.

Therefore, in order to solve this in the present embodiment,
The following control is performed. This control will be described in accordance with the subroutine of the relation processing between the lamp unit and the film carrier shown in FIG.

First, in step # 1, a state check is executed. When the state is 0, it is checked in step # 2 whether the lamp unit 41 is present.

Here, the state is initialized to 0 immediately after the power of the apparatus main body 1 is turned on.

When the lamp unit 41 is replaced, the power source is necessarily turned off by hardware due to the off state of the switch 622 when the front door 621 is opened. Therefore, the state is initialized to 0 in this case as well.

When it is determined in step # 2 that the lamp unit 41 is not present, the process proceeds to step # 4 and it is determined whether or not the film carrier 3 is present. Here, when the film carrier 3 is not present, that is, when the lamp unit 41 and the film carrier 3 are not present when the power is turned on,
14 is displayed on the message display portion 82 of the color CRT 2 so as to move to step # 8 and mount the lamp unit 41.
Display as shown in, and this subroutine ends.

If it is determined in step # 4 that the film carrier 3 is present, the process proceeds to step # 5 to identify the type of film carrier 3, that is, the film size,
In the next step # 6, switching control to an optical system suitable for the film size is executed.

Specifically, the image forming magnification of the color CCD sensor 112 of the optical system is changed according to the size of the mounted film (movement of the second and third mirrors 14 and 15, the image forming lens). Movement of 15, lens rearview mirror 16,
17 movements) are performed.

Subsequently, the process proceeds to step # 7, and since there is no lamp unit 41, it is necessary to mount the lamp unit 41 suitable for the film carrier 3 in the color CR.
The message is displayed on the message display portion 82 of T2 as shown in FIG. 15, and this subroutine is finished.

When it is determined in step # 2 that the lamp unit 41 is present, the process proceeds to step # 3, the state is set to 1, and this subroutine is completed.

If the determination of the state in step # 1 is 1, the process proceeds to step # 11 and it is checked here whether the film carrier 3 is present.

If there is no film carrier 3, step #
16, the message display portion 82 of the color CRT 2 is displayed as shown in FIG. 16 so that the film carrier 3 suitable for the lamp unit 41 is mounted, and this subroutine is finished.

When the film carrier 3 is mounted in step # 11, the process proceeds to step # 12, the type of the film carrier 3 mounted, that is, the film size is identified, and the optical system is adjusted to the film size. Change the imaging magnification.

Next, in step # 13, it is determined whether the film size matches the type of the lamp unit 41.

If the type of the lamp unit 41 does not match, a message as shown in FIG. 17 is displayed on the message display portion 82 of the color CRT 2 so that the lamp unit 41 of the type suitable for the film size is mounted in step # 15. , This subroutine ends.

If the types of the lamp units 41 match, a signal for permitting the transition processing such as image data acquisition is created in step # 14, and this subroutine is finished.

As described above, when the film carrier 3 and the lamp unit 41 are mounted and the types thereof are different from each other, the film size of the film carrier 3 is controlled so that the film size is prioritized.

This corresponds to the fact that the user's intention for use gives priority to the film carrier 3.

The switching control of the magnification of the optical system is executed by adopting the type of the film carrier 3 when both the lamp unit 41 and the film carrier 3 are mounted.

Control such as image data fetching is possible only when both the lamp unit 41 and the film carrier 3 are mounted and their types match.

As a result, the reading of the image on the film 11 is properly performed without excess or deficiency in the effective light emission length or the total light emission amount of the lamp unit 41, and the light amount is not wasted.

However, if the type of the lamp unit 41 is such that the effective emission length of the halogen lamp 45 is larger than the film size, the entire image on the film 11 is illuminated, so that the image is read even if the light quantity is insufficient. Is possible, and it is possible to correct a slight lack of light.

Therefore, even if the type of the lamp unit 41 is different from that of the film carrier 3, the halogen lamp 45
When the effective light emission length is larger than the film size, it is possible to permit the image data capturing process and the like.

However, in order to recognize such a state and promote proper use, it is desirable to perform the display as shown in FIG. 18 on the message display portion 82 of the color CRT 2.

By such control, it is possible to cope with a case where a user desires to reduce the number of types of the lamp units 41 to be used, or a case where a predetermined lamp unit 41 is not in time.

For these reasons, it is convenient to be able to switch the conditions for enabling image data acquisition and the like.

[0172]

According to the present invention, the illuminating means is used by replacing the illuminating means with an effective luminescence length and total luminescence amount according to the reading size of the original, or by replacing it with a new one, and illuminates the original appropriately to display an image. The reading can be successfully achieved and the failure to read the image due to improper lighting means can be eliminated.

If the illumination means is not installed, the control means prohibits the operation of reading the image based on the detection, and the illumination means is not replaced due to the replacement of the illumination means. Since the image reading in the mounted state is prevented, it is possible to prevent the useless reading of the image, and it is possible to let the user notice the unmounted state of the lighting means and deal with it at an early stage. Is improved.

The apparatus further comprises means for detecting the presence / absence of a document mounted, and means for detecting the size of the read image of the mounted document and the type of the illumination means, and the control means mounts both the document and the illumination means. In this case, if the magnification changing operation of the optical system is performed according to the size of the read image of the document, the image reading means is able to perform the magnification changing operation of the optical system regardless of the size of the image and the entire area of the image pickup means. When an image is formed and read, the image reading corresponding to the size of the image worn by the user as a reading target is performed prior to the type of the illumination means, and is inappropriate for the image reading size intended by the user. It is possible to prevent a loss or non-image portion from occurring in the read image itself due to zooming.

In this case, when the control means does not correspond to the size of the read image of the mounted original on the type of the installed illumination means, the control means displays a message prompting the replacement of the illumination means. When the image reading corresponding to the size of the image is performed with priority over the type of the lighting unit, the effective lighting length of the lighting unit and the total light emission amount are excessive or insufficient because the lighting unit does not support the image reading size. It is possible to prevent the image from being read as it is.

If the control means permits the image reading when the size of the read image of the mounted original and the type of the illuminating means mounted properly correspond, the reading of the original is performed. It is possible to solve the problems of image reading failure and illumination loss of the illumination unit when the size of the image and the type of illumination unit are different.

Further, the control means permits the reading of the image when the type of the illuminating means mounted corresponds to the size of the read image of the mounted original or a size larger than that. With this configuration, when the image reading unit forms an image on the entire area of the image pickup unit and reads the image with the zooming operation of the optical system regardless of the size of the image, the effective light emission length may vary depending on the type of the illumination unit installed. It is possible to prevent the image from being read only when it is deficient and may cause a fatal reading failure, and increase the chances of reading the image to improve the convenience of use.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a color image reading apparatus as seen from the front, showing an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an apparatus main body viewed from above.

FIG. 3 is a side view showing a schematic configuration of an illumination unit.

FIG. 4 is a perspective view of a main part of a lighting unit.

FIG. 5 is a perspective view of a lamp unit.

FIG. 6 is a conceptual diagram showing an internal configuration of a lamp unit.

FIG. 7 is a diagram showing types of lamps.

FIG. 8 is a front view of a film carrier.

FIG. 9 is a front view of the type detection unit of the film carrier.

FIG. 10 is a front view showing a color CRT, an operation panel, and an internal panel.

FIG. 11 is a block diagram of a CPU and its peripheral devices.

FIG. 12 is a block diagram of a parallel I / O and a circuit connected thereto.

FIG. 13 is a flowchart of a relationship processing subroutine of a lamp unit and a film carrier.

FIG. 14 is a front view showing a display state of a color CRT when neither a lamp unit nor a film carrier is attached.

FIG. 15 is a front view showing a display state of the color CRT when the film carrier is mounted and the lamp unit is not mounted.

FIG. 16 is a front view showing a display state of a color CRT when the lamp unit is mounted and the film carrier is not mounted.

FIG. 17 is a front view showing a display state of a color CRT when the mounted film carrier and the ramp unit are different types.

FIG. 18 is a view showing a display state of a color CRT at the time of enabling image reading when the types of the film carrier and the lamp unit are different from each other due to a specific relationship, under the control different from that of the embodiment of the invention. It is a front view shown.

FIG. 19 is an explanatory diagram showing an illumination state by a halogen lamp having an effective light emission length necessary for a large format film.

FIG. 20 is an explanatory diagram showing an illumination state when the halogen lamp of FIG. 19 is applied to a 35 mm film.

[Explanation of symbols]

 1 Device Main Body 2 Color CRT 3 Film Carrier 113 Illumination Unit 12 to 14, 16 to 18 Mirror 15 Imaging Lens 41 Lamp Unit 45 Halogen Lamp 50 Short Wire 61 Hole 112 Color CCD Sensor 161, 162, 164 Photo Sensor 200 CPU

Claims (5)

[Claims] 1. An image reading apparatus comprising: an illuminating means for illuminating an image of a document mounted on a document mounting part; and a reading means for imaging the image on an image capturing means to read the image. The illuminating means is replaceable. In addition to the above, an image reading apparatus is provided with a means for detecting whether or not the lighting means is mounted, and a control means for prohibiting an image reading operation when the lighting means is not mounted. 2. The image reading means forms an image on the entire area of the image pickup means and reads the image regardless of the size of the image with the zooming operation of the optical system. The control means further includes means for detecting the size of the read image of the mounted original and the type of the illuminating means, and the control means, when both the original and the illuminating means are mounted,
The image reading apparatus according to claim 1, wherein the magnification changing operation of the optical system is performed according to the size of the read image of the document. 3. The control unit according to claim 2, wherein when the type of the attached illumination unit does not correspond to the size of the read image of the attached document, the control unit displays a message prompting replacement of the illumination unit. Image reader. 4. The control means permits the reading of the image when the size of the read image of the mounted original and the kind of the mounted illumination means correspond appropriately. An image reading device according to any one of the above. 5. The image reading means reads the image by forming an image on the entire area of the image pickup means with the zooming operation of the optical system regardless of the size of the image, and the control means of the mounted illumination means. 4. The image reading according to claim 2, wherein the reading of the image is permitted when the type corresponds to the size of the read image of the mounted original or a size larger than that. apparatus.