JP3666731B2 - Document reading apparatus and document reading method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an original reading apparatus and an original reading method, and more particularly to an original reading apparatus and an original reading method for reading an original using an area sensor.
[0002]
[Prior art]
Conventionally, a pre-scan unit that roughly reads an image recorded on a film while conveying the film to obtain an outline of the image, and a density range of image reading, a measurement time, and the like according to a pre-scan result by the pre-scan unit There has been proposed an image reader that adjusts the film conveyance speed and arranges the main scanning unit that reads the image of the film with high spatial resolution and density resolution while aligning it in the film conveyance direction while conveying at the adjusted conveyance speed. (JP-A-7-15593).
[0003]
The pre-scan unit includes a light source for pre-scanning, a plurality of conveyance roller pairs for conveying the film, an imaging lens, and a line CCD for pre-scanning. The main scanning unit includes a light source for main scanning, a filter unit, a condensing unit, a pair of conveying rollers, an imaging lens, and a line CCD for main scanning. Further, the scanning conveyance speed in the pre-scanning section is equal to or higher than the maximum speed in the main scanning section.
[0004]
[Problems to be solved by the invention]
However, since the image reading apparatus is configured by separately arranging the pre-scan unit and the fine scan unit, the number of parts is increased and the configuration of the apparatus is complicated.
[0005]
Also, as described above, the prescan unit and the fine scan unit are arranged side by side in the film transport direction, and the scan transport speed in the prescan unit is equal to or higher than the maximum speed in the main scan unit. In order not to disturb the slack of the film due to the speed difference between the pre-scan section and the main scan section, the slack of the film is absorbed as necessary between the pair of transport rollers of the pre-scan section and the pair of transport rollers of the main scan section. An accumulator, etc. must be deployed.
[0006]
The present invention has been made in view of the above-described facts, and an object of the present invention is to provide a document reading apparatus and a document reading method that have a simple configuration and do not require a configuration that takes into account the speed difference during preliminary reading and main reading. And
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a document reading unit configured by arranging a plurality of line sensors and reading a document, and the document and the document reading unit in the arrangement direction of the plurality of line sensors. Moving means for relatively moving the document, and preliminarily reading the document while being relatively moved by at least one line sensor of the plurality of line sensors, and the document and the document reading means The original reading means and the moving means are controlled so that the original is read by the plurality of line sensors while the original and the original reading means are relatively stopped. Control means.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, an imaging lens for forming an image of the original on the original reading means, an adjusting means for adjusting a depth of field of the imaging lens, and the photographic film Plane regulating means for regulating the reading area by the document reading means in a plane to a plane, and the control means increases the depth of field when performing the preliminary reading, and the object when performing the main reading. The adjusting means and the plane regulating means are further controlled so as to reduce the depth of field and regulate the reading area to a plane.
[0009]
According to a third aspect of the present invention, in the first aspect of the present invention, the first flat surface restricting means for restricting a reading area of at least one line sensor of the plurality of line sensors in the original to a flat surface, And a second plane regulating unit that regulates the entire reading area to a plane by the document reading unit in the document, and the control unit uses the first plane regulating unit to perform the plurality of line sensors when performing the preliminary reading. The reading area by at least one of the line sensors is restricted to a plane, and when reading the book, all reading is performed by the original reading means by the second plane regulating means instead of the first plane regulating means. The first plane regulating means and the second plane regulating means are further controlled so as to regulate the area to a plane.
[0010]
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the original is a photographic photosensitive material on which an image frame is formed, and the position of the image frame is specified. At least one of perforations and barcodes is formed, and when the preliminary reading is performed, the control means performs the perforations and barcodes formed by at least one of the plurality of line sensors. When reading the book, further control is performed so that the image frame is positioned in a reading area by the document reading means based on the read perforation and / or bar code information. It is characterized by that.
[0011]
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the control means preliminarily uses at least one of the plurality of line sensors as a dedicated line sensor. In the preliminary reading, the original is read by the dedicated line sensor.
[0012]
The invention according to claim 6 is the invention according to claim 5, further comprising a leading edge detection sensor that is disposed upstream in the relative movement direction of the document at the time of the preliminary reading and detects the leading edge of the document. A line sensor that is projected onto the moving surface at a predetermined distance from the projection position of the leading edge detection sensor on the moving surface of the document is defined as the dedicated line sensor, and the control means detects the leading edge by the leading edge detection sensor. The document reading unit is controlled to start preliminary reading when the document is moved relative to the predetermined distance from the time when the document is detected.
[0013]
According to a seventh aspect of the present invention, there is provided an area sensor comprising a plurality of reading elements, a moving means for relatively moving the document and the area sensor in a predetermined movement direction, and the relative movement. The preliminary reading is performed by a part of the reading elements in the area sensor, the original and the area sensor are relatively intermittently moved, and the original and the area sensor are relatively stopped. Control means for controlling the area sensor and the moving means so as to read the original document by the area sensor.
[0014]
According to an eighth aspect of the present invention, in the seventh aspect of the invention, the first flat surface restricting means for restricting a reading area by a part of the reading elements of the area sensor to a flat surface, and the area sensor in the document. A second plane regulating means for regulating the entire reading area to a plane, and the control means uses a part of the reading elements in the area sensor by the first plane regulating means when performing the preliminary reading. In addition to restricting the reading area to a plane, the first reading is performed so that the entire reading area is regulated to a plane by the area sensor by the second plane regulating means instead of the first plane regulating means when performing the main reading. The plane regulating means and the second plane regulating means are further controlled.
[0015]
The invention according to claim 9 is the invention according to claim 7 or claim 8, wherein the document is a photographic photosensitive material on which an image frame is formed, and a perforation and barcode for specifying the position of the image frame. At least one is formed, and when the preliminary reading, the control means further reads at least one of the formed perforations and barcodes by a part of the reading elements of the area sensor, and In the actual reading, the image frame is further controlled so as to be positioned in a reading region by the area sensor based on at least one of the read perforation and barcode information.
[0016]
According to a tenth aspect of the present invention, in the invention according to any one of the seventh to ninth aspects, the control means predetermines a part of the reading elements of the area sensor as a dedicated reading element, In the preliminary reading, the original is read by the dedicated reading element.
[0017]
According to an eleventh aspect of the present invention, a plurality of line sensors are arranged and a document reading unit configured to read a document, and the document and the document reading unit are relatively moved in the arrangement direction of the plurality of line sensors. Moving means, at least one line sensor disposed at a position separated from the original reading means upstream of the movement of the original in the moving direction by the moving means, and a plurality of line sensors of the original reading means A single irradiating means for irradiating light to the reading area of the at least one line sensor and the reading area of the at least one line sensor, and the original is preliminarily read by the at least one line sensor in the relatively moving state. An area preliminarily read by the at least one line sensor based on the result of the preliminary reading is a reading area of the document reading unit. The original and the original reading means are relatively stopped in a state where the preliminary read area is positioned in the reading area of the original reading means, and the preliminary read areas are set as a plurality of the original reading means. And a control means for controlling the document reading means and the moving means so as to perform the main reading by the line sensor.
[0018]
According to a twelfth aspect of the present invention, a plurality of line sensors are arranged and a document reading unit configured to read a document, and the document and the document reading unit are relatively moved in the arrangement direction of the plurality of line sensors. An original reading method of an original reading apparatus, wherein the original is preliminarily read by at least one line sensor of the plurality of line sensors in the relatively moving state. The original and the original reading means are relatively intermittently moved, and the original is read by the plurality of line sensors while the original and the original reading means are relatively stopped.
[0019]
According to a thirteenth aspect of the present invention, there is provided an original reading apparatus comprising: an area sensor including a plurality of reading elements; and a moving unit that relatively moves the original and the area sensor in a predetermined moving direction. An original reading method,
Preliminary reading is performed by a part of the reading element of the area sensor in the relatively moving state, the original and the area sensor are relatively intermittently moved, and the original and the area sensor are relatively moved. Thus, the original is read by the area sensor while the document is stopped.
[0020]
According to a fourteenth aspect of the present invention, a plurality of line sensors are arranged and a document reading unit configured to read a document, and the document and the document reading unit are relatively moved in the arrangement direction of the plurality of line sensors. Moving means, at least one line sensor disposed at a position separated from the original reading means upstream of the movement of the original in the moving direction by the moving means, and a plurality of line sensors of the original reading means And a single irradiating means for irradiating light to the reading area of the at least one line sensor, the original reading method of the original reading apparatus, wherein the relative moving state The document is preliminarily read by the at least one line sensor, and the preliminary reading is performed by the at least one line sensor based on the result of the preliminary reading. The original and the original reading unit are relatively stopped in a state where the taken area is positioned in the reading area of the original reading unit and the preliminary read area is positioned in the reading area of the original reading unit. In addition, the preliminary read area is read by a plurality of line sensors of the document reading means.
[0021]
The document reading means according to the invention of claim 1 is configured by arranging a plurality of line sensors and reads a document. The moving unit relatively moves the document and the document reading unit in the arrangement direction of the plurality of line sensors. Note that the moving unit may move only the document, move only the document reading unit, or move the document and the document reading unit relatively.
[0022]
The control means preliminarily reads the document by at least one line sensor among the plurality of line sensors while relatively moving, and relatively intermittently moves the document and the document reading means and The original reading means and the moving means are controlled so that the original is read by a plurality of line sensors while the original reading means is relatively stopped.
[0023]
As described above, preliminary reading is performed by at least one of the line sensors of the plurality of line sensors of the document reading unit, the document and the document reading unit are relatively intermittently moved, and the document and the document reading unit are moved. While the document is relatively stopped, the original is read by a plurality of line sensors, that is, the preliminary reading and the main reading are not performed by separate reading units, but are performed by the document reading unit. In addition, the speed difference between the preliminary reading and the main reading may not be taken into consideration. Since the invention according to claim 12 has the same operation and effect, the description thereof is omitted.
[0024]
According to a second aspect of the present invention, the imaging lens forms an image of the original on the original reading means. The adjusting means adjusts the depth of field of the imaging lens. The adjusting means may adjust the depth of field by adjusting the aperture or moving the imaging lens to adjust the focal position. The plane regulation unit regulates the reading area of the document by the document reading unit to a plane.
[0025]
Here, if the document is bent, the image is formed on the document reading unit as a blurred image by the imaging lens. Thus, it is not preferable that the original is imaged on the original reading means as a blurred image.
[0026]
Therefore, the control means further controls the adjustment means and the plane regulation means so as to increase the depth of field during preliminary reading and to reduce the depth of field and regulate the reading area to a plane during main reading. To do.
[0027]
In this way, the depth of field is increased when pre-reading, and the depth of field is reduced and the reading area is restricted to a flat surface when reading the original, so that the original can be read with a sharpness corresponding to the preliminary reading and the main reading. Can be imaged on the original reading means, and the reading accuracy of the original can be improved.
[0028]
Here, the plane restricting means may be, for example, a pressure-bonding plate that presses the document and has an opening corresponding to the reading region, and is directed toward the center of the document (a convex vertex in the reading region). It is good also as a ventilation means to ventilate.
[0029]
In addition, the depth of field was increased during preliminary reading, the depth of field was reduced during main scanning, and the reading area was restricted to a flat surface. Since it is not necessary to read the document with higher accuracy than usual, the depth of field can be increased to make the blur of the document within an allowable range. On the other hand, the document needs to be read with high accuracy. In view of that.
[0030]
On the other hand, according to the present invention, as in the invention described in claim 3, the first plane regulating means for regulating the reading area by at least one line sensor of the plurality of line sensors in the document to a plane, and the document in the document A second plane regulating unit that regulates the entire reading area to a plane by the reading unit, and the control unit performs at least one line of the plurality of line sensors by the first plane regulating unit when performing preliminary reading. In addition to restricting the reading area by the sensor to a plane, the first plane is so arranged that the entire reading area is regulated to a plane by the original reading means by the second plane regulating means instead of the first plane regulating means at the time of actual reading. You may make it further control a control means and a 2nd plane control means.
[0031]
As described above, the preliminary reading is performed by the first plane regulating unit, and the main reading is performed by the second plane regulating unit instead of the first plane regulating unit during the preliminary reading. In addition, the area corresponding to the main reading can be restricted to a plane, the original can be clearly imaged on the original reading means, and the reading accuracy of the original can be improved.
[0032]
Note that the first plane regulating unit and the second plane regulating unit may be a blowing unit that blows air toward the center of the document (a convex vertex in the reading area). Further, the first plane regulating means is a pressure roller that crimps the outside of the image reading required area of the document, and the second plane regulating means is formed with an opening corresponding to the reading area that crimps the document. It is good also as a crimping plate.
[0033]
Here, it is assumed that the original is a photographic photosensitive material on which an image frame is formed as in the invention described in claim 4, and at least one of perforation and bar code for specifying the position of the image frame is formed. Also good.
[0034]
In this case, when the preliminary reading is performed, the control unit further reads at least one of the formed perforations and barcodes by at least one of the plurality of line sensors, and at the time of performing the main reading. Based on the read perforation and / or bar code information, the image frame is further controlled to be positioned in the reading area by the document reading means.
[0035]
Thus, since at least one of perforation and barcode is read by at least one line sensor among the plurality of line sensors, a special sensor or the like can be omitted.
[0036]
According to the fifth aspect of the present invention, the control means predetermines at least one line sensor of the plurality of line sensors as a dedicated line sensor, and reads the document by the dedicated line sensor when performing preliminary reading. You may do it.
[0037]
In this case, as in the invention described in claim 6, the document moving surface includes a leading edge detection sensor that is disposed on the upstream side in the relative movement direction of the document at the time of preliminary reading and detects the leading edge of the document. A line sensor projected at a predetermined distance from the projection position of the leading edge detection sensor on the moving surface is defined as a dedicated line sensor, and the control means determines whether the document is predetermined after the leading edge detection sensor detects the leading edge. The document reading unit may be controlled so that the preliminary reading is started after the relative movement.
[0038]
By the way, in the above-described invention, the document reading means is constituted by a plurality of line sensors, and at least one line sensor among the plurality of line sensors is preliminarily read and the plurality of line sensors are fully read. . However, when the preliminary reading and the main reading are not performed by separate reading units but by the document reading unit, the document reading unit is not necessarily configured by a plurality of line sensors.
[0039]
That is, as in the seventh aspect of the invention, the area sensor may be composed of a plurality of reading elements. In this case, the moving means relatively moves the document and the area sensor in a predetermined moving direction. The control means performs preliminary reading by a part of the reading elements of the area sensor while relatively moving, and relatively intermittently moves the document and the area sensor and moves the document and the area sensor. The area sensor and the moving unit may be controlled so that the original is read by the area sensor while the document is relatively stopped.
[0040]
As described above, the area sensor is constituted by a plurality of reading elements, and the original and the area sensor are preliminarily read by a part of the area sensor while the original and the area sensor are relatively moved, and the original and the area are also read. Since the original is read by the area sensor while the sensor is relatively intermittently moved and the original and the area sensor are relatively stopped, the preliminary reading and the main reading are not performed by separate reading units. This can be performed by a sensor, and a simple configuration can be achieved, and the difference in speed between the preliminary reading and the main reading need not be taken into consideration. Since the invention according to claim 13 has the same operation and effect, description thereof will be omitted.
[0041]
Further, as in the eighth aspect of the invention, the first plane regulating means for regulating the reading area by a part of the reading elements in the area sensor to a plane and the entire reading area to the plane by the area sensor in the document. And a second plane regulating means for controlling the reading area by the first plane regulating means to be a plane by the first plane regulating means to be a plane when performing preliminary reading. In this case, instead of the first plane regulating means, the first plane regulating means and the second plane regulating means are further controlled by the second plane regulating means so as to regulate the entire reading area to the plane by the area sensor. It may be.
[0042]
In the invention described in claim 8, as in the invention described in claim 3, the area corresponding to the preliminary reading and the main reading can be restricted to a plane, and the original can be clearly imaged on the area sensor. Reading accuracy can be improved.
[0043]
As described above, the document is a photographic photosensitive material on which image frames are formed, and at least one of perforations and barcodes for specifying the positions of the image frames is formed. When reading, at least one of the perforation and barcode formed as described above is further read by a part of the reading elements of the area sensor, and when reading the main information, information on at least one of the read perforation and barcode is read. Based on the above, it may be further controlled that the image frame is positioned in the reading area by the area sensor.
[0044]
Further, the control means may determine a part of the reading elements in the area sensor as a dedicated reading element in advance, and read the original by the dedicated reading element when performing preliminary reading.
[0045]
According to an eleventh aspect of the present invention, a plurality of line sensors are arranged and a document reading unit configured to read a document, and the document and the document reading unit are relatively moved in the arrangement direction of the plurality of line sensors. Moving means, at least one line sensor disposed at a position separated from the original reading means upstream of the movement of the original in the moving direction by the moving means, and a plurality of line sensors of the original reading means And a single irradiation means for irradiating light to the reading area of the at least one line sensor.
[0046]
That is, the single irradiating means irradiates light to the reading areas of the plurality of line sensors and the reading area of the at least one line sensor of the document reading means. Thus, it is sufficient to provide a single irradiation means, and the entire configuration can be simplified and miniaturized.
[0047]
Then, the control means preliminarily reads the original with the at least one line sensor in the relatively moving state, and preliminarily reads with the at least one line sensor based on the result of the preliminary reading. The document and the document reading unit are relatively stopped in a state in which the read region is positioned in the reading region of the document reading unit, and the preliminary read region is positioned in the reading region of the document reading unit, and The document reading unit and the moving unit are controlled so that the preliminary read area is read by a plurality of line sensors of the document reading unit.
[0048]
In this way, the document is preliminarily read by at least one line sensor, and the area preliminarily read by the at least one line sensor is stopped in the reading area of the document reading unit based on the result of the preliminary reading. In addition, since the main reading is performed by the plurality of line sensors of the original reading means, the preliminary reading and the main reading can be performed without reciprocating the original. In addition, since invention of Claim 14 also has the same effect | action and effect, the description is abbreviate | omitted.
[0049]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, although it demonstrates using the numerical value which does not hinder this invention below, this invention is not limited to the numerical value described below.
[0050]
As shown in FIG. 1, an area CCD scanner (image reading apparatus) 14 according to the present embodiment includes an image processing unit 16, a mouse 20, two types of keyboards 12A and 12B, and a work table 27 provided with a display 18. Is provided.
[0051]
One keyboard 12 </ b> A is embedded in the work surface 27 </ b> U of the work table 27. The other keyboard 12B is stored in the drawer 24 of the work table 27 when not in use, and is taken out from the drawer 24 and stacked on one keyboard 12A when in use. At this time, the cord of the keyboard 12B is connected to the jack 110 connected to the image processing unit 16.
[0052]
The cord of the mouse 20 is connected to the image processing unit 16 through a hole 108 provided in the work table 27. The mouse 20 is stored in the mouse holder 20A when not in use, and is removed from the mouse holder 20A and placed on the work surface 27U when in use.
[0053]
The image processing unit 16 is stored in a storage unit 16 </ b> A provided on the work table 27 and is hermetically sealed by an opening / closing door 25. Note that the image processing unit 16 can be taken out by opening the door 25.
[0054]
The area CCD scanner 14 is for reading a film image recorded on a photographic material such as a photographic film such as a negative film or a reversal film. For example, a 135 size photographic film, a 110 size photographic film, and a transparent film are used. Film images of photographic film (240-size photographic film: so-called APS film), 120-size and 220-size (Broni size) photographic films on which a magnetic layer is formed can be read. The area CCD scanner 14 reads the film image to be read by the area CCD and outputs image data.
[0055]
Here, the photographic film refers to a film in which a negative image or a positive image is visualized after being photographed and developed.
[0056]
The image processing unit 16 receives the image data output from the area CCD scanner 14 and performs various image processing such as various corrections on the input image data to obtain laser data (not shown) as recording image data. Output to the printer unit.
[0057]
As shown in FIGS. 2 and 3, the optical system of the area CCD scanner 14 is set on the light source unit 30 disposed below the work table 27, the diffusion box 40 supported on the work table 27, and the work table 27. , A film carrier 38 as a moving means, and a reading unit 43 disposed on the opposite side of the light source unit 30 with the work table 27 interposed therebetween.
[0058]
The light source unit 30 is accommodated in a metal casing 31, and a lamp 32 made of a halogen lamp, a metal halide lamp, or the like is disposed inside the casing 31.
[0059]
A reflector 33 is provided around the lamp 32, and a part of the light emitted from the lamp 32 is reflected by the reflector 33 and emitted in a certain direction. A plurality of fans 34 are provided on the side of the reflector 33. The fan 34 is operated while the lamp 32 is lit to prevent the inside of the casing 31 from being overheated.
[0060]
On the light exit side of the reflector 33, the light of the wavelength in the ultraviolet region and the infrared region is cut along the optical axis L of the light emitted from the reflector 33, thereby preventing the chemical change of the photographic film 22 and increasing the temperature. The UV / IR cut filter 35 for preventing and improving the reading accuracy, the diaphragm 39 for adjusting the light amount of the light from the lamp 32 and the light emitted from the reflector 33, and the color component of the light reaching the photographic film 22 and the reading unit 43 Are appropriately set according to the type of photographic film (negative film / reversal film), and a turret 36 (see FIG. 4B) in which a balance filter 36N for negative film and a balance filter 36P for reversal film are fitted. ) Are provided in order.
[0061]
The diaphragm 39 is composed of a pair of plate materials (diaphragm plates) arranged with the optical axis L in between, and is slidable so that the pair of plate materials approach and separate. As shown in FIG. 4A, the cross-sectional area of the pair of plate members of the diaphragm 39 continuously changes from one end side along the slide direction to the other end side along the direction orthogonal to the slide direction. Thus, the notches 39A are respectively formed on one end side, and are arranged so that the sides on which the notches 39A are formed face each other.
[0062]
In the above configuration, any of the filters (36N, 36P) corresponding to the type of photographic film is positioned on the optical axis L so that light of a desired light component is obtained, and light that passes through the diaphragm 39 depending on the position of the diaphragm 39. Is adjusted to a desired light amount.
[0063]
As the diffusion box 40 comes to the top, that is, as it gets closer to the photographic film 22, the length of the photographic film 22 conveyed by the film carrier 38 becomes narrower (see FIG. 2) and is orthogonal to the conveying direction. The length of the direction (width direction of the photographic film 22) is increased (see FIG. 3). Further, light diffusion plates (not shown) are respectively attached to the light incident side and the light emission side of the diffusion box 40. The diffusion box 40 is for 135 size photographic film, but a diffusion box (not shown) having a shape corresponding to another photographic film is also prepared.
[0064]
The light incident on the diffusion box 40 is turned into slit light with the width direction of the photographic film 22 as a longitudinal direction toward the film carrier 38 (that is, the photographic film 22), and is also made into diffused light by the light diffusion plate. It is injected. In this way, the light emitted from the diffusion box 40 is converted into diffused light, so that unevenness in the amount of light applied to the photographic film 22 is reduced, and the film image is irradiated with a uniform amount of slit light. Even if the film image has scratches, the scratches are less noticeable.
[0065]
The film carrier 38 and the diffusion box 40 are prepared for each type of photographic film 22 and are selected according to the photographic film 22.
[0066]
At positions corresponding to the optical axis L on the upper and lower surfaces of the film carrier 38, elongated openings (not shown) longer than the width of the photographic film 22 are provided in the width direction of the photographic film 22. The slit light from the diffusion box 40 is irradiated to the photographic film 22 through the opening provided on the lower surface of the film carrier 38, and the transmitted light of the photographic film 22 passes through the opening provided on the upper surface of the film carrier 38. To the reading unit 43.
[0067]
Further, the diffusion box 40 is supported so that the upper surface approaches the reading position. Therefore, a cutout portion is provided on the lower surface of the film carrier 38 so that the film carrier 38 and the diffusion box 40 do not interfere when the film carrier 38 is loaded.
[0068]
The film carrier is configured so that the photographic film 22 can be conveyed at a plurality of speeds according to the density of the film image to be fine scanned at the time of pre-scanning or fine scanning.
[0069]
The reading unit 43 is arranged in a state accommodated in the casing 44. Inside the casing 44, a mounting table 47 having an area CCD 116 as an area sensor attached is provided on the upper surface, and a plurality of lens tubes 49 are suspended from the mounting table 47. A lens unit 50 as an imaging lens is supported inside the lens tube 49 so as to be slidable in a direction A that approaches and separates from the work table 27 for zooming such as reduction or enlargement. A support frame 45 is erected on the work table 27. The mounting table 47 is supported on a guide rail 42 attached to the support frame 45 so as to be slidable in a direction B that approaches and separates from the work table 27 in order to secure a conjugate length during zooming and autofocusing. The lens unit 50 includes a plurality of lenses, and a lens diaphragm 51 as an adjusting unit is provided between the plurality of lenses. As shown in FIG. 4C, the lens diaphragm 51 includes a plurality of diaphragm plates 51A formed in a substantially C shape. Each diaphragm plate 51A is arranged uniformly around the optical axis L, and one end thereof is pivotally supported by a pin, and is rotatable about the pin. The plurality of diaphragm plates 51A are connected via a link (not shown), and rotate in the same direction when a driving force of a lens diaphragm driving motor (described later) is transmitted. With the rotation of the diaphragm plate 51A, the area of the portion that is not shielded by the diaphragm plate 51A around the optical axis L (substantially star-shaped portion in FIG. 4C) changes and passes through the lens diaphragm 51. The amount of light to change changes.
[0070]
In the area CCD 116, a large number of photoelectric conversion elements (hereinafter referred to as CCD elements) such as CCD cells or photodiodes are arranged in a line in the width direction of the photographic film 22, and a sensing unit provided with an electronic shutter mechanism is spaced apart. A plurality of sets of three lines are provided in parallel with each other, and one of R, G, and B color separation filters is respectively attached to the light incident side of each sensing unit of each set ( Each set is a so-called 3-line color CCD). In addition, a large number of transfer units are provided in the vicinity of each sensing unit, corresponding to each sensing unit, and the charge accumulated in each CCD cell of each sensing unit is sequentially transmitted through the corresponding transfer unit. Transferred.
[0071]
A CCD shutter 52 is provided on the light incident side of the area CCD 116. As shown in FIG. 4D, the CCD shutter 52 is fitted with an ND filter 52ND. The CCD shutter 52 rotates in the direction of the arrow u to fully block the light incident on the area CCD 116 for dark correction (the portion 52B in which the ND filter 52ND is not fitted includes the optical axis L). (Located at position 52C), a fully open state in which light is incident on the area CCD 116 for normal reading and light correction (position in FIG. 4D), and light incident on the area CCD 116 for linearity correction The state is switched to any one of the dimming states where the light is dimmed by 52ND (the ND filter 52ND is located at the position 52C).
[0072]
As shown in FIG. 3, the work table 27 is provided with a compressor 94 that generates cooling air for cooling the photographic film 22. The cooling air generated by the compressor 94 is guided by a guide tube 95 to a reading unit (not shown) of the film carrier 38 and supplied. Thereby, the area | region located in the reading part of the photographic film 22 can be cooled. The guide tube 95 passes through a flow rate sensor 96 that detects the flow rate of the cooling air. In addition, it is not limited to a flow sensor, You may make it provide the sensor which detects the wind speed of a cooling wind, and the pressure sensor which detects a pressure.
[0073]
The schematic configuration of the electrical system of the area CCD scanner 14 and the image processing unit 16 will be described with reference to FIG. 6 while referring to the main part of the optical system of the area CCD scanner 14 shown in FIG.
[0074]
The area CCD scanner 14 includes a microprocessor 46 that controls the entire area CCD scanner 14. The microprocessor 46 is connected to a RAM 68 (for example, SRAM) and a ROM 70 (for example, a ROM capable of rewriting stored contents) via a bus 66, and a lamp driver 53, a compressor 94, a flow sensor 96, and a motor driver 48. Is connected. The lamp driver 53 turns on and off the lamp 32 in response to an instruction from the microprocessor 46. Further, when reading the film image of the photographic film 22, the microprocessor 46 operates the compressor 94 in order to supply cooling air to the photographic film 22. The flow rate of the cooling air is detected by the flow rate sensor 96, and the microprocessor 46 detects an abnormality.
[0075]
Further, the motor driver 48 has the turret 36 in the direction of arrow t in FIG. 4B so that either the negative film balance filter 36N or the reversal film balance filter 36P of the turret 36 is positioned on the optical axis L. A turret drive motor 54 that rotates and a turret position sensor 55 that detects a reference position (not shown) of the turret 36 (see also FIG. 4B) are connected. The motor driver 48 further includes a diaphragm drive motor 56 that slides the diaphragm 39, a diaphragm position sensor 57 that detects the position of the diaphragm 39, and a mounting table 47 (that is, the area CCD 116 and the lens unit 50) on the guide rail 42. A reading unit driving motor 58 that slides along the lens, a reading unit position sensor 59 that detects the position of the mounting table 47, a lens driving motor 60 that slides the lens unit 50 along the lens tube 49, and a position of the lens unit 50. The lens position sensor 61 that rotates, the lens aperture driving motor 62 that rotates the aperture plate 51A of the lens aperture 51, the lens aperture position sensor 63 that detects the position of the lens aperture 51 (the position of the aperture plate 51A), and the CCD shutter 52 are fully closed. Shutter drive to switch to any of the state, fully open state and dimming state Over data 64, the shutter position sensor 65 for detecting a shutter position, the fan drive motor 37 for driving the fan 34 is connected.
[0076]
The microprocessor 46 performs the turret based on the positions of the turret 36 and the diaphragm 39 detected by the turret position sensor 55 and the diaphragm position sensor 57 when performing the prescan (preliminary reading) and the fine scan (main reading) by the area CCD 116. The turret 36 is driven to rotate by the drive motor 54 and the diaphragm 39 is slid by the diaphragm drive motor 56 to adjust the light applied to the film image.
[0077]
Further, the microprocessor 46 determines the zoom magnification according to the size of the film image, whether or not to perform trimming, and the like by the reading unit position sensor 59 so that the film image is read by the area CCD 116 at the determined zoom magnification. The mounting table 47 is slid by the reading unit driving motor 58 based on the detected position of the mounting table 47, and the lens unit 50 is slid by the lens driving motor 60 based on the position of the lens unit 50 detected by the lens position sensor 61. Move.
[0078]
When performing focus control (autofocus control) to match the light receiving surface of the area CCD 116 with the film image formation position by the lens unit 50, the microprocessor 46 slides only the mounting table 47 by the reading unit driving motor 58. Move. For example, the focus control can be performed so that the contrast of the film image read by the area CCD 116 is maximized (so-called image contrast method). Instead, the photographic film 22 and the lens unit 50 (or the area) are used. A distance sensor that measures the distance from the CCD 116) by infrared rays or the like may be provided, and the distance may be determined based on the distance detected by the distance sensor instead of the film image data.
[0079]
On the other hand, a timing generator 74 is connected to the area CCD 116. The timing generator 74 generates various timing signals (clock signals) for operating the area CCD 116 and an A / D converter 82 described later. The signal output terminal of the area CCD 116 is connected to the A / D converter 82 via the amplifier 76, and the signal output from the area CCD 116 is amplified by the amplifier 76 and converted into digital data by the A / D converter 82. Is done.
[0080]
The output terminal of the A / D converter 82 is connected to the image processing unit 16 via a correlated double sampling circuit (CDS) 88 and an interface (I / F) circuit 90 in this order. The CDS 88 samples feedthrough data representing the level of the feedthrough signal and pixel data representing the level of the pixel signal, and subtracts the feedthrough data from the pixel data for each pixel. Then, the calculation result (pixel data accurately corresponding to the accumulated charge amount in each CCD cell) is sequentially output to the image processing unit 16 as scan image data via the I / F circuit 90.
[0081]
Further, the display 18, the keyboards 12 </ b> A and 12 </ b> B, the mouse 20, and the film carrier 38 are connected to the image processing unit 16.
[0082]
By the way, in the film carrier 38, as shown in FIGS. 7A and 7B, the position of the reading area by the area CCD 116 of the photographic film 22 and the position separated from the reading area to the area CCD side. A moving crimping plate 120 having an opening R corresponding to the reading area is provided. When the crimping plate 120 is crimped to the position of the reading area by the area CCD 116 of the photographic film 22, the flatness of the photographic film 22 is secured. A plurality of image frames 121 are formed on the photographic film 22, and a perforation 150 and a barcode 152 for specifying the position of each image frame 121 are formed corresponding to each image frame 121. The perforation 150 specifies a specific position of each image frame 121, and the barcode 152 specifies how many positions from the image frame located at the end. As shown in FIG. 7B, the opening R is sized so that the image frame 121, the perforation 150, and the barcode 152 are inside when the image frame 121 is positioned in the reading area. Yes. Therefore, each line sensor of the area CCD 116 can read the perforation 150 and the barcode 152 in addition to the image frame 121.
[0083]
In the film carrier 38, a leading edge detection sensor 122 for detecting the leading edge of the photographic film 22 is provided on the upstream side in the movement direction of the photographic film 22 at the time of pre-scanning (before the reading area). A line sensor that is projected at a predetermined distance A on the moving surface from the projection position of the leading end detection sensor 122 on the moving surface of the photographic film 22 is determined in advance as a dedicated line sensor.
[0084]
FIG. 8 shows a main routine of the area CCD scanner 14F according to the present embodiment. This routine starts when the photographic film 22 is loaded on the film carrier 38 and a start key (not shown) is turned on. Pre-scanning is performed at step 120, and fine scanning is performed at step 132.
[0085]
Next, the pre-scan (step 130) will be described in detail with reference to FIG. At the time of pre-scanning, as shown in FIG. 7A, the crimping plate 120 is located at a position (refer to the dotted line) spaced from the position of the reading area by the area CCD 116 of the photographic film 22 to the area CCD side. . In step 134 in FIG. 9, the lens aperture driving motor 62 is controlled so that the lens unit 50 is stopped by the stop 51 so that the depth of field becomes deep. That is, the photographic film 22 may be curved. When curved in this way, the photographic film 22 has a position approaching the area CCD 116 side and a position moving away from the area CCD 116 side. In this step 134, the lens unit is set so that the position (expected position) of the photographic film 22 approaching the area CCD 116 is a near point and the position (expected position) of the photographic film 22 moving away from the area CCD 116 is a distant point. The lens aperture driving motor 62 is controlled so that 50 is reduced by the aperture 51. In step 136, conveyance of the photographic film 22 is started.
[0086]
In step 138, it is determined whether or not the leading edge of the photographic film 22 is detected by the leading edge detection sensor 122. If the leading edge of the photographic film 22 is detected by the leading edge detection sensor 122, as described above, as described above. Is positioned at a distance A away from the dedicated line sensor on the upstream side of the photographic film in the conveyance direction.
[0087]
In step 140, it is determined whether or not the photographic film 122 has moved the distance A by determining whether or not the time required for the photographic film 122 to move the distance A has elapsed from the transport speed and the distance A. That is, it is determined whether or not the leading edge of the photographic film 122 has reached the reading area of the dedicated line sensor.
[0088]
If the leading edge of the photographic film 122 has reached the reading area of the dedicated line sensor, in step 142, reading of the photographic film 22 by the dedicated line is started. At this time, not only the image frame 121 formed on the photographic film 22 but also the perforation 150 and the barcode 152 are read. Thereby, the position of the image frame 121 can be specified.
[0089]
In step 144, it is determined whether or not the rear end of the photographic film 22 has been detected by determining whether or not the amount of light received by the dedicated line sensor has become extremely large. If the rear end of the photographic film 22 is detected, the reading of the photographic film 22 has been completed, and in step 146, the conveyance and reading of the photographic film are completed.
[0090]
Next, the fine scan (step 132) will be described in detail with reference to FIG. In step 148 of FIG. 10, the lens aperture drive motor 62 is controlled so that the lens unit 50 is stopped by the stop 51 so that the depth of field becomes shallow.
[0091]
By the way, since the number of image frames formed on the photographic film 22 can be grasped by pre-scanning as described above, a variable G for sequentially identifying each image frame is initialized at step 150, and at step 152. The variable G is incremented by 1, and in step 154, conveyance of the photographic film 22 is started in the direction opposite to that during pre-scanning. Based on the information of the perforation 150 and the barcode 152 described above, it is determined whether or not the image frame G identified by the variable G has been positioned within the entire reading area of the area CCD 116 (see FIG. 7B).
[0092]
When the image frame G is located in the entire reading area of the area CCD 116, the conveyance of the photographic film 22 is stopped in step 158. In step 160, the pressure-bonding plate 120 is pressure-bonded to the photographic film 22 as shown in FIG. Thereby, the flatness of the reading area is ensured. Since the flatness is ensured in this way, in step 162, the photographic film 22 is read by the entire area CCD. Note that when the reading of the document is completed for the entire area CCD, the crimping plate 120 is retracted (dotted line position in FIG. 7A).
[0093]
It is determined whether or not the variable G is the total number of image frames G0 formed on the photographic film. If the variable G is not the total number G0 of image frames, there are image frames that have not been fine-scanned yet, so the process returns to step 152 and the above processing (steps 152 to 164) is executed. On the other hand, if the variable G is the total number of image frames G0, all the image frames have been fine-scanned, so this routine is terminated.
[0094]
As described above, in the present embodiment, pre-scanning is performed by one line sensor of area sensors, and fine scanning is performed by a plurality of line sensors. Therefore, each of preliminary reading and main reading can be performed by the area sensor. In addition, the configuration can be simplified and the difference in speed between the preliminary reading and the main reading need not be taken into consideration.
[0095]
In this embodiment, the depth of field is increased when performing preliminary reading, and the depth of field is decreased and the reading area is restricted to a plane when performing main reading. The original can be imaged on the area sensor with high definition, and the reading accuracy of the original can be improved.
[0096]
Furthermore, in the present embodiment, since at least one of perforation and barcode is read by the dedicated line sensor, a special sensor or the like can be omitted.
[0097]
In the embodiment described above, the depth of field is increased during pre-scanning, and the depth of field is reduced and the crimping plate is crimped during fine scanning. As shown in FIGS. 11 and 12, in addition to the pressure plate 126, a pair of pressure rollers 120 and 124 for restricting the reading area of the dedicated line to a flat surface are disposed, and the depth of field is shallow. As shown in FIGS. 11A and 12, during the pre-scan, the reading area of the dedicated line is restricted to a plane by a pair of pressure rollers 120 and 124, and during the fine scan, a pair of pressure rollers Instead of 120 and 124, the photographic film 22 may be pressure-bonded by a pressure-bonding plate 126.
[0098]
In the above-described embodiment, the depth of field is adjusted by the lens diaphragm. However, the present invention is not limited to this, and the focal position is slightly shifted from the photographic film surface to the area CCD side (photograph) by the reading unit driving motor. Even if the depth of field is adjusted by moving the lens unit so that the position approaching the area CCD side of the film is the near point and the position away from the area CCD side of the photographic film is the far point) Good.
[0099]
In the above-described embodiment, the pressure plate and the pressure roller are employed. However, the present invention is not limited to this, and air blowing means for blowing air to the center of the photographic film may be employed.
[0100]
Furthermore, in the above-described embodiment, the dedicated line sensor is a line sensor having a predetermined distance from the tip detection sensor, but the present invention is not limited to this, and may be arbitrarily selected. Moreover, although one line sensor is used as a dedicated line sensor, the present invention is not limited to this, and a plurality of line sensors may be used. In this case, for example, three line sensors may be used and a three-line color sensor that reads light (R light, G light, and B light) in different reading wavelength ranges may be used.
[0101]
In addition, in the above-described embodiment, the pre-scan is performed on the forward path and the fine scan is performed on the return path. However, the present invention is not limited to this, and the fine scan is performed every time an image frame is specified by the pre-scan. You may make it do.
[0102]
By the way, in the embodiment described above, the area sensor is constituted by a plurality of line sensors, and at least one line sensor among the plurality of line sensors is preliminarily read and the plurality of line sensors are read by the main line. Yes. However, when each of the preliminary reading and the main reading is performed by an area sensor rather than by separate reading units, the area sensor does not necessarily need to be configured by a plurality of line sensors.
[0103]
That is, as shown in FIG. 13, the area sensor may be configured by arranging a plurality of CCDs. When the direction perpendicular to the conveyance direction of the photographic film 22 is the main scanning direction and the conveyance direction is the sub-scanning direction, the CCD is preliminarily read by a CCD predetermined for each pixel line in the main scanning direction. You may make it read this with all CCD. In this case, a reading time is determined according to a predetermined CCD position, and preliminary reading is performed.
[0104]
As shown in FIG. 13, if a CCD is randomly determined corresponding to each pixel line in the main scanning direction, control of the reading timing of each CCD becomes complicated. Therefore, as shown in FIG. 14, for each pixel line in the main scanning direction, preliminary reading is performed with a predetermined CCD so as to shift to the adjacent position as the line approaches the other end in order from one end. You may make it do.
[0105]
On the other hand, in the above-described embodiment, the photographic film is conveyed from one end to the other end in the pre-scan, and the photographic film is conveyed from the other end to the one end in the fine scan. However, the present invention is limited to this. A fine scan and a pre-scan are performed while the photographic film is conveyed from one end to the other end.
[0106]
That is, as shown in FIG. 15, (at least one) line sensor 116L located upstream in the photographic film conveying direction in the area CCD 116 is defined as a dedicated line sensor for pre-scanning, and other than the line sensor 116L. A line sensor corresponding to an area in which an image frame in the line sensor can be read may be determined as a fine scan CCD and controlled as shown in FIG. As shown in FIG. 15, the diffusion box 40 is provided with an opening P so that the light is condensed in the reading area of the line sensor 116L, and the light is diffused in the reading area of the fine scan CCD. A diffusion plate 40B is provided so as to avoid this. The light reflecting surface of the diffusing plate 40 is configured to be rotatable. As will be described later, the light is condensed on the reading area of the line sensor 116L during pre-scanning, and the reading area of the CCD for fine scanning during fine scanning. The light reflecting surface of the diffusing plate 40 may be controlled so that light is diffused into the light. In addition, the same code | symbol is attached | subjected to the effect | action part similar to embodiment mentioned above, and the detailed description is abbreviate | omitted.
[0107]
That is, in step 134 of FIG. 16, the aperture is adjusted so that the depth of field is deep, and in the next step 136, conveyance of the photographic film 22 is started. In step 202, the line sensor 116L is used, It is determined whether or not an image frame has been detected based on a change in the output of the line sensor 116L (strong → weak). If no image frame is detected, it is determined in step 204 whether or not the trailing edge of the photographic film has passed through the line sensor 116L based on the change in the output of the line sensor 116L (strong → stronger). If it is determined that the rear end of the photographic film has passed through the line sensor 116L, the processing is completed for all the image frames, and thus this routine ends.
[0108]
On the other hand, if it is determined in step 202 that an image frame has been detected, it is determined in step 206 whether or not the detection of the image frame has ended based on the change (weak → strong) of the output of the line sensor 116L. to decide. When the detection of the image frame is completed, the size of the image frame is known based on the time from the detection of the image frame to the end of the detection. In step 210, the image frame is determined based on the size of the image. It is determined whether or not it has arrived at the fine scan area (the reading area of the fine scan CCD). If the image frame has arrived at the fine scan area, the conveyance of the photographic film 22 is stopped at step 212, the aperture adjustment is performed so that the depth of field becomes shallow at step 148, and the crimping plate 120 at step 160. In step 214, the image frame is read with a fine scan CCD (not using the line sensor 116L). In step 216, the pressure bonding of the pressure plate is released, and the process returns to step 134.
[0109]
In the example shown in FIG. 15, the line sensor 116L located upstream in the photographic film transport direction in the area CCD 116 is defined as a dedicated line sensor for pre-scanning, and image frames in line sensors other than the line sensor 116L are defined. However, the present invention is not limited to this, and the area CCD 116 reads an image frame as shown in FIG. Fine scan CCD 160B composed of line sensors for the possible area, and a dedicated (at least one) line for pre-scanning that is independently arranged upstream of the fine scan CCD 160B in the photographic film conveyance direction. And a line sensor 160A defined as a sensor. It may be.
[0110]
Further, at the time of the pre-scan, as shown in FIG. 18A, the image frame is reduced to a magnification n = n1 to form an image on the area CCD 116, and a part of at least one line sensor in the area CCD 116 is formed. As shown in FIG. 18B, the image frame is pre-scanned with a CCD of the above-mentioned as described above, and the image frame is relatively enlarged (magnification n = n2 (> n1) as shown in FIG. 18B). )) To form an image on the area CCD 116, and the area CCD 116 may finely scan the image frame as described above.
[0111]
By the way, the above-described line sensor has a set of three line sensors, that is, a line sensor having an R filter, a line sensor having a G filter, and a line having a B filter.
[0112]
In the above-described embodiment, the case where a CCD is used as the area CCD has been described as an example. However, the present invention is not limited to this, and other solid-state imaging devices such as a MOS type imaging sensor can be used. is there.
[0113]
Furthermore, in the above-described embodiment, the document is moved with respect to the area CCD. However, the present invention is not limited to this, and the area CCD is moved with respect to the document, or the document and the area CCD are relatively moved. You may make it move.
[0114]
In the above description, the film image recorded on the photographic film is used as a reading target document, and the film image is read by light transmitted through the film image. However, the present invention is not limited to this. The present invention may be a transparent original other than the film image recorded on the photographic film, and the present invention is applicable to a film reading device of a telecine converter, for example. Further, it may be a reflection original such as an image recorded on a medium (for example, plain paper) having low or no light transmission. In this case, the document reading apparatus according to the present invention may be configured to read the light emitted from the light source and reflected by the document. The present invention can be applied to, for example, a color copying machine (color copier, etc.) or a facsimile apparatus. The present invention can also be applied to other document reading devices.
[0115]
【The invention's effect】
As described above, according to the first, seventh, twelfth and thirteenth aspects of the present invention, the preliminary reading and the main reading can be performed by the original reading unit, and a simple configuration can be achieved. There is an effect that it is not necessary to consider the speed difference.
[0116]
According to the second aspect of the present invention, the depth of field is increased during preliminary reading, and the depth of field is reduced during main reading and the reading area is restricted to a flat surface. The original can be imaged on the original reading means with high definition, and the reading accuracy of the original can be improved.
[0117]
According to the third and eighth aspects of the present invention, the preliminary plane reading is regulated by the first plane regulating means, and the main reading is regulated by the second plane regulating means instead of the first plane regulating means. Thus, the area corresponding to the preliminary reading and the main reading can be restricted to a flat surface, the original can be clearly imaged on the original reading means, and the reading accuracy of the original can be improved. Have.
[0118]
The inventions according to claims 4 and 9 have the effect that a special sensor or the like can be omitted.
[0119]
In the invention described in claims 11 and 14, light is irradiated by the irradiation unit to the plurality of line sensors of the document reading unit and at least one line sensor arranged at a position spaced apart from the document reading unit. Since it is arranged in the irradiation area, one irradiation means for reading an original can be provided, and the entire configuration can be simplified and reduced in size.
[Brief description of the drawings]
FIG. 1 is an external view of an area CCD scanner.
FIG. 2 is a front sectional view of an optical system of an area CCD scanner.
FIG. 3 is a side sectional view of an optical system of an area CCD scanner.
4A is a plan view showing an example of a diaphragm, FIG. 4B is a turret, FIG. 4C is a lens diaphragm, and FIG. 4D is an example of a CCD shutter.
FIG. 5 is a diagram showing only a main part of an optical system of an area CCD scanner.
FIG. 6 is a block diagram showing a schematic configuration of an electric system of an area CCD scanner.
7A and 7B are diagrams showing positions of a tip detection sensor, a pressure plate, and a dedicated line sensor, where FIG. 7A is a cross-sectional view and FIG. 7B is a top view.
FIG. 8 is a flowchart showing a main routine of the present embodiment.
FIG. 9 is a flowchart showing a pre-scan routine in step 130 of FIG.
10 is a flowchart showing a fine scan routine in step 132 of FIG. 8. FIG.
FIGS. 11A and 11B are diagrams showing positions of a tip detection sensor, a pressure roller, a pressure plate, and a dedicated line sensor according to a modified example, in which FIG. 11A shows a state during pre-scanning and FIG. FIG.
FIG. 12 is a view showing a pressure roller.
FIG. 13 is a diagram showing an example in which an area CCD is composed of a plurality of CCDs.
FIG. 14 is a diagram showing another example in which the area CCD is composed of a plurality of CCDs.
FIG. 15 is a diagram showing a configuration in which fine scanning and pre-scanning are performed while a photographic film is conveyed from one end to the other end.
16 is a flowchart showing an operation of performing fine scan and pre-scan while the photographic film having the configuration shown in FIG. 15 is conveyed from one end to the other end.
FIG. 17 is a view showing another configuration for performing fine scan and pre-scan while conveying a photographic film from one end to the other end.
FIG. 18 is a diagram illustrating an example of reading with a relatively reduced size during pre-scanning and reading with a relatively enlarged size during fine scanning.
[Explanation of symbols]
116 Area CCD (area sensor)
38 Film carrier (moving means)
46 Microprocessor (control means)
50 Lens unit (imaging means)
51 Lens iris (adjustment means)
120 Crimping plate (plane regulating means, second plane regulating means)
126 Pressure roller (first plane regulating means)
150 perforation
152 Barcode

Claims (14)

A document reading means configured by arranging a plurality of line sensors and reading a document;
Moving means for relatively moving the original and the original reading means in the arrangement direction of the plurality of line sensors;
The document is preliminarily read by at least one line sensor among the plurality of line sensors in the relatively moving state, and the document and the document reading means are relatively intermittently moved and Control means for controlling the original reading means and the moving means so that the original is read by the plurality of line sensors while the original and the original reading means are relatively stopped;
A document reading apparatus comprising: An imaging lens for imaging the original on the original reading means;
Adjusting means for adjusting the depth of field of the imaging lens;
Plane regulating means for regulating the reading area by the document reading means in the photographic film to a plane;
Including
The control means increases the depth of field at the time of preliminary reading and reduces the depth of field at the time of main reading and regulates the reading area to a plane. To further control the plane regulating means,
The document reading apparatus according to claim 1, wherein: First plane regulating means for regulating a reading area by at least one line sensor of the plurality of line sensors in the document to a plane;
Second plane regulating means for regulating the entire reading area of the document by the document reading means to a plane;
With
The control means restricts the reading area of at least one line sensor of the plurality of line sensors to a plane by the first plane regulating means when performing the preliminary reading, and also when the main reading is performed, In place of the first plane restricting means, the first plane restricting means and the second plane restricting means are further controlled by the second plane restricting means so as to restrict the entire reading area to the plane by the document reading means. To
The document reading apparatus according to claim 1, wherein: The original is a photographic photosensitive material on which an image frame is formed, and at least one of perforation and bar code for specifying the position of the image frame is formed,
The control means further reads at least one of the formed perforations and bar codes by at least one line sensor of the plurality of line sensors when performing the preliminary reading, and when reading the main reading. Further, based on at least one of the read perforation and bar code information, the image frame is further controlled to be positioned in a reading area by the document reading means.
The document reading device according to claim 1, wherein the document reading device is a document reading device.   2. The control unit according to claim 1, wherein at least one line sensor of the plurality of line sensors is predetermined as a dedicated line sensor, and when the preliminary reading is performed, the original is read by the dedicated line sensor. The document reading device according to claim 4. A leading edge detection sensor that is disposed on the upstream side in the relative movement direction of the document at the time of the preliminary reading and detects the leading edge of the document;
A line sensor that is projected at a predetermined distance from the projection position of the leading edge detection sensor onto the moving surface of the document on the moving surface is defined as the dedicated line sensor,
The control unit controls the document reading unit to start preliminary reading from the time when the document is moved relative to the predetermined distance from when the leading edge is detected by the leading edge detection sensor;
6. The document reading apparatus according to claim 5, wherein An area sensor comprising a plurality of reading elements;
Moving means for relatively moving the document and the area sensor in a predetermined moving direction;
Preliminary reading is performed by a part of the reading element of the area sensor in the relatively moving state, the original and the area sensor are relatively intermittently moved, and the original and the area sensor are moved. Control means for controlling the area sensor and the moving means so as to read the original document by the area sensor during a relatively stopped state;
A document reading apparatus comprising: First plane regulating means for regulating a reading area by a part of the reading elements of the area sensor to a plane;
Second plane regulating means for regulating the entire reading area to a plane by the area sensor in the document;
With
The control means restricts a reading area by a part of the reading elements of the area sensor to a flat surface by the first flat surface restricting means at the time of the preliminary reading, and at the first time at the time of the main reading. In place of the plane regulating means, the first plane regulating means and the second plane regulating means are further controlled by the second plane regulating means so as to regulate the entire reading area to the plane by the area sensor.
8. The document reading apparatus according to claim 7, wherein The original is a photographic photosensitive material on which an image frame is formed, and at least one of perforation and bar code for specifying the position of the image frame is formed,
The control means further reads at least one of the formed perforations and bar codes by a part of the reading elements of the area sensor when performing the preliminary reading, and reads the reading when performing the main reading. Based on at least one of perforation and barcode information, the image frame is further controlled to be positioned in a reading region by the area sensor.
9. A document reading apparatus according to claim 7 or 8, wherein   8. The control device according to claim 7, wherein a part of the reading elements of the area sensor is predetermined as a dedicated reading element, and when the preliminary reading is performed, the original is read by the dedicated reading element. 10. The document reading device according to any one of 9 above. A document reading means configured by arranging a plurality of line sensors and reading a document;
Moving means for relatively moving the original and the original reading means in the arrangement direction of the plurality of line sensors;
At least one line sensor disposed upstream of the movement of the document in the movement direction by the moving unit and spaced from the document reading unit;
A single irradiating means for irradiating light to a reading area of a plurality of line sensors of the original reading means and a reading area of the at least one line sensor;
The document is preliminarily read by the at least one line sensor in the relatively moving state, and an area preliminarily read by the at least one line sensor is based on the result of the preliminary reading. The preliminarily read area that is positioned in the reading area of the original reading means, and the preliminary reading area is positioned in the reading area of the original reading means, and the original and the original reading means are relatively stopped. Control means for controlling the original reading means and the moving means so that the original reading is performed by a plurality of line sensors of the original reading means;
A document reading apparatus comprising: A document reading means configured by arranging a plurality of line sensors and reading a document;
Moving means for relatively moving the original and the original reading means in the arrangement direction of the plurality of line sensors;
An original reading method for an original reading apparatus comprising:
The document is preliminarily read by at least one line sensor of the plurality of line sensors in the relatively moving state,
The original and the original reading unit are relatively intermittently moved, and the original is read by the plurality of line sensors while the original and the original reading unit are relatively stopped.
Document reading method. An area sensor comprising a plurality of reading elements;
Moving means for relatively moving the document and the area sensor in a predetermined moving direction;
An original reading method for an original reading apparatus comprising:
Preliminarily read by a part of the reading element of the area sensor in the relatively moving state,
The original and the area sensor are relatively intermittently moved, and the original is read by the area sensor while the original and the area sensor are relatively stopped.
Document reading method. A document reading means configured by arranging a plurality of line sensors and reading a document;
Moving means for relatively moving the original and the original reading means in the arrangement direction of the plurality of line sensors;
At least one line sensor disposed upstream of the movement of the document in the movement direction by the moving unit and spaced from the document reading unit;
A single irradiating means for irradiating light to a reading area of a plurality of line sensors of the original reading means and a reading area of the at least one line sensor;
An original reading method for an original reading apparatus comprising:
The original is preliminarily read by the at least one line sensor in the relatively moving state,
Based on the result of the preliminary reading, an area preliminarily read by the at least one line sensor is positioned in a reading area of the document reading unit,
A plurality of line sensors of the document reading unit are configured to relatively stop the document and the document reading unit in a state where the pre-read region is positioned in the reading region of the document reading unit. Read the book with
Document reading method.

Images