JP2001028667A - Transparent original reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized transparent original reader with less loss in the luminous quantity. SOLUTION: An optical fiber unit 82 consisting of a bundle of optical fibers is placed between a light source section 80 and a photo film. The light source section 80 uses lenses 92R, 92G, 92B, 92IR respectively to collect lights emitted form LED light sources 90R, 90G, 90B, 90IR and makes the collected light incident onto an optical fiber bundle. The optical fiber unit 82 guides the light made incident by the optical fibers in the vicinity of the photo film. Since the optical fiber can guide a light almost with no loss, the luminous quantity lost from the emission from the LED light sources 90R, 90G, 90B, 90IR to the emission to the photo film can be suppressed. Furthermore, the use of a dichroic mirror can be omitted and the reader is made small in size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmissive original reading apparatus, and more particularly, to a transmissive original reading apparatus which irradiates a transparent original with light and reads a transmitted image by a photoelectric conversion element.

[0002]

2. Description of the Related Art In recent years, while a transparent original such as a photographic film is conveyed in a sub-scanning direction at a constant reading speed, an image recorded on the transparent original is read by a line CCD (charge coupled device).
e) Transparency document reading by reading with a scanner, performing various corrections and the like on the image data obtained by the reading, and then recording an image on a recording material such as photographic paper and displaying an image on a display. The device has been put to practical use. In such a transparent original reading apparatus, compared with a conventional image reading apparatus that records an image recorded on a transparent original on photographic paper by surface exposure, the reading of an image recorded on a transparent original, a printing paper, etc. This has the advantage that work up to image recording on the recording material can be easily automated.

In the above-described transmissive original reading apparatus, a white light source such as a halogen lamp has conventionally been used as a light source for illuminating the transmissive original. In recent years, however, instead of the white light source, each of RGB colors (flaw position detection) has been used. For example, an apparatus using an LED light source that emits color in IR (InfraRed) may be used. By applying the LED light source that emits each color of RGB, a filter for separating the color of the white light source becomes unnecessary, and the device configuration can be simplified. Also, the setting of conditions such as the balance of each color can be simplified. FIG. 6 shows a general configuration of a light source using LEDs.

As shown in FIG. 6, a light source 100 includes:
LED light source 102R that outputs R light, LED light source 102G that outputs G light, LED light source 1 that outputs B light
02B, an LED light source 102IR for outputting IR light is provided. The light source 100 includes a dichroic mirror 104X that reflects G light, a dichroic mirror 104Y that reflects B light, and a dichroic mirror 104Z that reflects IR light.

[0005] Dichroic mirrors 104X, 104
Y and 104Z are R emitted from the LED light source 102R.
The optical axis of this R light and the LED
The light sources 102G, 102B, and 102IR are respectively arranged so that the optical axes of the G, B, and IR lights emitted from the light sources 102G, 102B, and 102IR coincide with each other. That is, in the light source 100, the LED light sources 102R, 102G, 102B, and 102 are provided by the dichroic mirrors 104X, 104Y, and 104Z.
RGB and IR light emitted from the IR can be combined with light on the same optical axis to irradiate a transparent original.

[0006]

However, in the prior art, dichroic mirrors (104X, 104Y,
104Z) and LED light sources (102R, 102G, 10
2B, 102IR) requires a sufficient space, which is an obstacle to downsizing the apparatus. Also,
Since the LEDs are arranged at a distance from the transparent original, there is also a problem that the light amount is largely lost before the LED is irradiated on the transparent original.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a small-sized transparent original reading apparatus with small loss of light quantity.

[0008]

According to a first aspect of the present invention, there is provided a transparent original reading apparatus for irradiating a transparent original with light and reading the transmitted image by a photoelectric conversion element, comprising a plurality of light emitting elements. The light source unit, provided between the light source unit and the transmissive document, one end surface is an irradiation region of the light source unit, the other end surface is an irradiation region to the transparent document, from the light source unit An optical fiber bundle for guiding the output light to the vicinity of the irradiation surface of the transparent document.

According to the first aspect of the present invention, the light output from the light source unit composed of a plurality of light emitting elements (LED, EL, etc.) is guided by the optical fiber bundle to the vicinity of the irradiation surface of the transmission original. Irradiates the transparent original. The optical fiber can guide the light with almost no loss of the light amount, so that the light amount lost before reaching the transparent original can be suppressed. Further, since the dichroic mirror which has been conventionally required can be omitted, the apparatus can be downsized. At this time, if the light emitting elements are densely arranged in a circle, a square, or the like, the size of the light source unit can be reduced without reducing the output light amount.

Note that the optical fiber bundle includes not only a general glass fiber aggregate but also a glass tube aggregate having a predetermined diameter. Several meters as the diameter of
m or less is preferable. In addition, when the optical fiber bundle is used by twisting (for adjusting the shape of the optical fiber bundle or adjusting the light amount distribution), a glass tube having a diameter of 0.5 mm or less is easy to use.

According to a second aspect of the present invention, in the first aspect of the present invention, the light source unit includes a light condensing member that condenses the light output from the light emitting element and makes the light incident on the optical fiber bundle. It is characterized by that.

According to the second aspect of the invention, in the light source section, the light output from the light emitting element is condensed by the light condensing member and made incident on the optical fiber bundle. Thereby, the amount of light lost before entering the optical fiber bundle can be suppressed.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a contour formed by arranging the light emitting elements of the light source unit and the light source of the optical fiber bundle are provided. It is characterized in that the shape of the part side end surface is substantially the same.

According to the third aspect of the present invention, the light source unit side (that is, the light incident side) of the optical fiber bundle has substantially the same shape as the contour shape formed by arranging the light emitting elements of the light source unit. Therefore, light quantity loss can be reduced and light from the light source unit can be made incident on the optical fiber bundle.

According to a fourth aspect of the present invention, the optical fiber bundle according to any one of the first to third aspects, wherein each of the optical fiber bundles has an optical fiber at the light source section side end face and the transmission original side end face. Are formed so as to have different relative positional relationships.

According to the fourth aspect of the present invention, the relative positional relationship between the optical fibers constituting the optical fiber bundle is determined by, for example, twisting the optical fiber bundle. Side), and the optical fiber bundle can emit light having a light amount distribution different from that of the incident light. Thus, for example, even if there is a deviation in the light amount distribution of the light incident on the optical fiber bundle, the deviation can be eliminated and uniform light can be applied to the transmission original.

According to a fifth aspect of the present invention, in the light emitting device according to any one of the first to fourth aspects, a plurality of the light source sections are provided for each light emitting element that outputs light of a different wavelength band. Is provided.

According to the fifth aspect of the present invention, RGB
Light sources are separately provided for each wavelength band necessary for reading a transparent original, and control such as adjustment of light amount balance can be easily performed.

According to a sixth aspect of the present invention, in the first aspect of the present invention, the light source unit includes a plurality of types of light emitting elements that output light in different wavelength bands. It is characterized by being constituted.

According to the sixth aspect of the present invention, RGB
Light of multiple wavelength bands necessary for reading transmissive originals, etc.
It can be output by one light source unit. That is, the number of light source units (see the LED light sources 102R, 102G, 102B, and 102IR in FIG. 6) required for each wavelength band can be reduced, and the device can be downsized. Further, since there is only one light source unit, the light source units can be arranged so that light enters the optical fiber bundle at the most efficient angle, and a device with less light loss can be realized.

According to a seventh aspect of the present invention, in the light emitting device according to the fifth or sixth aspect, the light of the different wavelength band is incident on the same region of the light source unit side end face of the optical fiber bundle, and An optical fiber bundle combines and emits the light in the different wavelength bands.

According to the seventh aspect of the present invention, RGB
Light of multiple wavelength bands necessary for reading transmissive documents, such as
The light is incident on the same region on the light source unit side end surface (incident side) of the optical fiber bundle. Accordingly, it is possible to combine light in a plurality of wavelength bands and irradiate the light on a transmission original without using a dichroic mirror.

According to an eighth aspect of the present invention, in the light emitting device according to the fifth or sixth aspect, the light of the different wavelength band is different for each wavelength band from a predetermined end face of the optical fiber bundle on the light source section side. And the optical fiber bundle emits light along different optical axes for each of the wavelength bands.
It is characterized by:

According to the eighth aspect of the present invention, the RGB
Light of multiple wavelength bands necessary for reading transmissive documents, such as
Since the light is incident on different regions on the light source side end surface (incident side) of the optical fiber bundle for each wavelength band, the light from the optical fiber bundle is not synthesized light of a plurality of wavelength bands but light along different optical axes for each wavelength band. Can be emitted. Thus, for example, when an image is read by a three-line color CCD while transporting a transparent original, the RGB light corresponding to the light receiving surface of each line CCD can be imaged, and the RGB image can be read simultaneously. Since the relative image reading position between R, G, and B is always constant, the image can be read without being affected by the fluctuation of the transport speed of the transparent original or the fluctuation of the optical system alignment.

According to a ninth aspect of the present invention, in the invention according to any one of the first to eighth aspects, the end face of the optical fiber bundle on the transparent original side is formed in a line shape,
The photoelectric conversion elements are arranged in a line in the same direction as the transparent document side end face of the optical fiber bundle formed in the line shape, and the transparent document is arranged in a direction orthogonal to the linear arrangement direction of the photoelectric conversion elements. An image is recorded while moving.

According to the ninth aspect of the present invention, the photoelectric conversion elements for reading the transmission image are arranged in a line (a so-called line sensor). While moving the transparent original at a constant speed in a direction orthogonal to the direction in which the photoelectric conversion element lines are arranged, a transmission image from the transparent original is read by the photoelectric conversion element. At this time, by forming the end face of the optical fiber bundle on the transmission original side in a line in a direction parallel to the photoelectric conversion elements arranged in a line, it is optimal for reading an image by a line sensor (excess irradiation for image reading). Slit light (having no region) can be emitted.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, a digital laboratory system according to the present embodiment will be described.

(Schematic Configuration of Entire System) FIGS. 1 and 2
1 shows a schematic configuration of a digital laboratory system 10 according to the present embodiment.

As shown in FIG. 1, the digital lab system 10 includes a line CCD scanner section 14, an image processing section 16, a laser printer section 18, and a processor section 20.
And the line CCD scanner unit 14
The image processing unit 16 is integrated as an input unit 26 shown in FIG. 2, and the laser printer unit 18 and the processor unit 20 are integrated as an output unit 28 shown in FIG.

The line CCD scanner section 14 is for reading a frame image recorded on a photographic film such as a negative film or a reversal film.
35 size photographic film, 110 size photographic film, and photographic film (24
0 size photographic film: so-called APS film), 12
Frame images of photographic film of size 0 and size 220 (Brownie size) can be read. The line CCD scanner unit 14 reads the above-mentioned frame image to be read by the line CCD 30, A / D converts it in the A / D converter 32, and outputs image data to the image processing unit 16.

In this embodiment, a digital lab system 10 in which a photographic film (APS film) F of 240 size is applied will be described.

The image processing section 16 receives image data (scanned image data) output from the line CCD scanner section 14 and receives image data obtained by photographing with a digital camera 34 or the like, a document (for example, a reflection document). , Etc.) with a scanner 36 (flatbed type), image data generated by another computer and recorded in a floppy disk drive 38, MO drive or CD drive 40, and via a modem 42. It is configured such that communication image data and the like (hereinafter, these are collectively referred to as file image data) received from outside can be input from the outside.

The image processing section 16 stores the input image data in the image memory 44, and performs a color gradation processing section 46, a hypertone processing section 48, and a hyper sharpness processing section 50.
Image processing such as various corrections and the like, and outputs the image data to the laser printer unit 18 as recording image data. Further, the image processing unit 16 outputs the image data subjected to the image processing to an external device as an image file (for example, outputs the image data to a storage medium such as an FD, an MO, a CD, or to another information processing device via a communication line). Transmission, etc.).

The laser printer unit 18 has R, G, and B laser light sources 52, and controls a laser driver 54 to record image data (temporarily stored in the image memory 56) input from the image processing unit 16. Is applied to the photographic printing paper, and scanning exposure (in the present embodiment, mainly the polygon mirror 58 and the fθ lens 60) is performed.
An image is recorded on the photographic paper 62 by an optical system using the same.

The processor unit 20 is provided with a photographic paper 6 on which an image is recorded by scanning exposure by the laser printer unit 18.
2 are subjected to color development, bleach-fix, water washing and drying. Thus, an image is formed on the printing paper.

(Configuration of Line CCD Scanner) Next, the configuration of the line CCD scanner section 14 will be described. FIG.
2 shows a schematic configuration of an optical system of the line CCD scanner unit 14. This optical system includes a light source unit 80 that irradiates light to the photographic film F. An optical fiber unit 82 and a photographic film F are provided on the light exit side of the light source unit 80.
A film carrier 84 for transporting the frame image so as to be perpendicular to the optical axis is arranged.

As shown in FIGS. 3 and 4, the light source unit 80 includes four LED light sources 90R, 90G, 90B, 90B.
An IR is provided. The LED light source 90R is an LED element that outputs red (R) light, and the LED light source 90G is green (G).
An LED element that outputs blue (B) light, an LED element that outputs blue (B) light, and an LED light source 90IR
Is constituted by arranging a large number of LED elements for outputting infrared (IR) light in a circle (or square) on a substrate.

LED light sources 90R, 90G, 90B, 90
The IRs are arranged such that the light emitted from each IR is incident on the lower end face 82A at substantially the same angle and at substantially the same distance from the lower end face 82A of the optical fiber unit 82. LED light sources 90R, 90G, 90B, 90I
R emits divergent light having a circular (or square) spread toward the lower end face 82A of the optical fiber unit 82 with the optical axes LR, LG, LB, and LIR as symmetry axes. .

The light source section 80 includes an LED light source 90.
R, 90G, 90B, and 90IR, lenses 92R, 92G, 92
B, 92IR. LED light source 90R, 9
Light emitted from the optical fibers 0G, 90B, and 90IR are condensed by lenses 92R, 92G, 92B, and 92IR, respectively, and are incident on the lower end surface of the optical fiber unit 82 at a predetermined incident angle (the amount of light reflected on the end surface of the optical fiber is smaller than a desired value). Is determined to be smaller).

In order to correct the bias of the distribution of the amount of light incident on the optical fiber unit 82, the lenses 92R and 92R
Between the G, 92B, 92IR and the optical fiber unit 82, for example, a diffusing plate such as a milky white plate, opal glass, or LSD (light shaving diffuser) may be arranged.

The optical fiber unit 82 is formed by bundling a plurality of optical fibers, and its lower end surface 82A is circular (square when the arrangement of the LED elements of the LED light source is square), and the photographic film extends from the lower end to the upper end. The width in the sub-scanning direction (arrow S direction) along the transport direction of F becomes narrower, and the width in the main scanning direction (arrow M direction) orthogonal to the sub-scanning direction becomes wider, so that the upper end surface 82B becomes linear. The shape is as follows.

The optical fiber unit 82 has a lower end face 82
LED light sources 90R, 90G, 90B, 90 incident on A
The light from the IR is guided by the optical fiber to the upper end surface 82B without losing the light amount, and the upper end surface (the upper end surface 82B) is guided.
B) to the reading position R as slit-like light (illumination light) whose longitudinal direction is the main scanning direction (the width direction of the photographic film F).
Irradiate the photographic film F supported by

In order to guide the light with little loss of light quantity, the diameter of the optical fiber is about several mm, which is sufficient. However, in the present embodiment, the shapes of the lower end face 82A and the upper end face 82B are different. Since the optical fiber bundle needs to be slightly twisted, an optical fiber having a diameter of 0.5 mm or less is used.

The incident light of the optical fiber unit 82 (ie, the LED light sources 90R, 90G, 90B, 90I)
In the case where there is unevenness in the light amount (light from R), in order to eliminate the unevenness in the light amount (to obtain illumination light having no unevenness in the light amount), the lower end surface 82A and the upper end surface 82B are each twisted by twisting the optical fiber bundle or the like. The relative positions of the optical fibers may be random.

The film carrier 84 has a slit-like opening (not shown) long in the main scanning direction at a position corresponding to an optical axis (optical axis of a lens unit 86, which is an image forming optical system described later) L1 on the upper and lower surfaces. Is provided. Therefore, the light emitted from the optical fiber unit 82 is applied to the photographic film F through an opening provided on the lower surface of the film carrier 84, and the light transmitted through the photographic film F is transmitted to the opening provided on the upper surface of the film carrier 84. The light is formed into a slit shape and emitted.

On the side opposite to the light source section 80 with the photographic film F interposed therebetween, a lens unit 86 for forming light transmitted through the frame image and a line CCD 30 are sequentially arranged along the optical axis L1 (FIG. 1). reference). The lens unit 8
Although only a single lens is shown as 6, the lens unit 86 is actually a zoom lens composed of a plurality of lenses. In addition, as the lens unit 86,
A selfoc lens may be used. In this case, it is preferable that both end surfaces of the SELFOC lens are as close to the photographic film F and the line CCD 30 as possible.

The line CCDs 30 are arranged in a line along the width direction of the photographic film F on which a plurality of CCD cells are conveyed (direction perpendicular to the conveying direction), and a sensing unit provided with an electronic shutter mechanism is provided at an interval. Are provided in parallel with one another, and three lines are provided, and one line is further provided at intervals. Each sensing part of the former three lines has R,
One of the G and B color separation filters is attached to each other (a so-called three-line color CCD), and an IR light separation filter is mounted on the light incident side of the latter one-line sensing unit. . The line CCD 30 is arranged so that the light receiving surface of each sensing unit coincides with the image forming point position of the lens unit 86.

Although not shown, the line CCD 3
A shutter is provided between the lens unit 0 and the lens unit 86.

The line CCD 30 converts the electric charge stored in the CCD cell into a line signal corresponding to the image density of the photographic film F along the main scanning line at every cycle corresponding to the transport speed of the photographic film F as an A / D converter. 32. A /
The D converter 32 converts the line signal from the line CCD 30 into a digital signal, and transmits the digital signal to the image processing unit 16 as image data.

(Operation) Next, the operation of the present embodiment configured as described above will be described.

When the photographic film F is set, the reading conditions of the CCD shutter and the like in the line CCD scanner section 14 are set to predetermined values for pre-scanning. When the setting of the reading conditions is completed, the LED light sources 90R, 90G, 90
B, 90IR is turned on, the photographic film F is conveyed at a high speed, and prescan is started.

More specifically, the LED light sources 90R, 90G, 9
The R, G, B, and IR light emitted from OB and 90IR are respectively transmitted through lenses 92R, 92G, 92B, and 92IR.
Is focused so as to substantially coincide with the lower end surface 82A,
The light enters the optical fiber unit 82. The light that has entered the optical fiber unit 82 is guided to the upper end surface 82B by the optical fiber, and is applied to the photographic film F supported at the reading position R as slit-shaped illumination light. That is, in the optical fiber unit 82, the illumination light is guided to the vicinity of the photographic film F by the optical fiber while preventing a loss of light amount, and the illumination light is emitted toward the photographic film F. At this time, the illumination light emitted from the optical fiber unit 82 becomes a light beam with the optical axis L1 as the axis of symmetry.

As a result, light having a light amount corresponding to the image density is transmitted through the image recording area of the photographic film F supported at the reading position R, and the illumination light carrying the film image is also transmitted along the optical axis L.
A light beam having a symmetry axis of 1 enters the lens unit 86 and is detected by the line CCD 30. Line CCD
The line signal based on the image density obtained by 30 is digitally converted and transferred to the image processing unit 16 to generate image data (low resolution).

The image processing section 16 determines the image density, color balance and the like of the film image of the photographic film F based on the image data (low resolution) obtained by the prescan. Further, a reading condition for a fine scan for a film image is obtained based on the determination result.

When the prescan of all the film images of the photographic film F is completed, the reading conditions are set to the values for the fine scan obtained by the prescan. When the setting of the reading conditions is completed, the photographic film F is transported at a low speed in a direction opposite to the transport direction of the prescan, and fine scan is started. The photographic film F is irradiated with illumination light in the same manner as in the pre-scan, and light having a light amount corresponding to the image density is detected by the line CCD 30.

The R, G, B, and IR line signals based on the image density obtained by the line CCD 30 are digitally converted and transmitted to the image processing unit 16. Image processing unit 16
Then, based on the received data, using known techniques, the position of the scratches and dust on the photographic film F is detected, and the image data corrected so that the influence of the scratches and dust is not noticeable is generated. I do. The generated image data is stored in the image memory 44.

The image data is processed by the image processing unit 16.
After being subjected to image processing such as various corrections such as color gradation processing, hypertone processing, and hyper sharpness processing, the image data is output to the laser printer unit 18 as image data for recording. In the laser printer section 18, the photographic paper is irradiated with laser light modulated in accordance with the recording image data, and an image is recorded on the photographic paper 62 by scanning exposure. The photographic paper 62 on which an image has been recorded by scanning exposure by the laser printer unit 18 is conveyed to the processor unit 20 and subjected to color development, bleach-fixing, washing, and drying to form an image on the photographic paper.

As described above, in this embodiment, the LED
An optical fiber unit 82 comprising a bundle of optical fibers is disposed between the light sources 90R, 90G, 90B, 90IR and the photographic film F, and the LED light sources 90R, 90G, 90
B, light from 90IR is guided to the vicinity of the photographic film F by an optical fiber. Since the optical fiber can guide the light with little loss of the light amount, the LED light sources 90R, 90G, 90B,
It is possible to suppress the amount of light lost between the time when the light is emitted from the 90IR and the time when the light is irradiated onto the photographic film F. Also, the dichroic mirrors (three) used in the prior art are omitted, and one optical fiber unit 82 is used.
Accordingly, RGB and IR light can be combined, so that the device can be downsized.

The LED light sources 90R, 90G, 90
B, the light from 90IR is transmitted through lenses 92R, 92G, 92
B, the optical fiber unit 82
Is made to enter. This makes it possible to suppress the amount of light lost between the time when the light is emitted from the LED light sources 90R, 90G, 90B and 90IR and the time when the light enters the optical fiber unit 82.

In order to reduce the size of the LED light sources without lowering the output, the LED light sources 90R, 90G, 90
In B and 90IR, the LED elements are densely arranged in a circle or a square, which can further reduce the size of the device. At this time, by forming the shape of the incident surface (lower end surface 82A) of the optical fiber unit 82 so as to match the arrangement shape of the LED elements of the LED light source, the light from the LED light source is not wasted (light loss is suppressed). The light can enter the optical fiber unit 82. Further, by forming the exit surface (upper end surface 82B) of the optical fiber unit 82 in a line shape, it is possible to emit slit light that is optimal (has no extra irradiation area) for reading a film image.

In the above description, the LED light sources 90R, 90G, 90B and 90I are separately provided for R, G, B and IR.
Although R is provided, the present invention is not limited to this. In order to further reduce the size of the device, the R, G, B, and IR LED elements can be densely arranged on one substrate, so that the LED light sources can be integrated. At this time, the incident surface of the optical fiber unit 82 (the lower end surface 8
With respect to 2A), by making light incident at an incident angle at which the amount of light reflected on the incident surface is the smallest, loss of the amount of light can be further suppressed.

In the above description, the optical fiber unit 8
2, R, G, B,
Although the IR light is made incident, the present invention is not limited to this. For example, as shown in FIG.
B and IR light are respectively transmitted to different regions (arrows AR, AG,
(See AB, AIR) so that slit light can be obtained for each of R, G, B, and IR.

At this time, R, which has passed through the photographic film F,
G, B, and IR light are respectively transmitted to the R,
The R, G, B, and IR images may be read simultaneously by forming an image on the light receiving surface of each of the four lines (3 lines + 1 line) of G, B, and IR. This allows
The relative image reading positions of R, G, B, and IR can always be kept constant, and image reading can be performed without being affected by fluctuations in the transport speed of the photographic film F and fluctuations in optical system alignment. it can.

At this time, as described in this embodiment, the light sources for the R, G, B,
An ED light source (a plurality of light sources) may be provided and used, or R, G, B, and IR light may be input so as to be incident on different regions of the incident surface (lower end surface 82A) of the optical fiber unit 82, respectively. R, G, B, IR on one substrate
An LED light source (one light source) provided with a D element may be used.

In the above description, the R, G, B, and IR lights are simultaneously turned on by using the line CCD 30 provided with four R, G, B, and IR lines (3 lines + 1 line). Although the case where the image of the photographic film F is read has been described as an example, the present invention is not limited to this. The light to be turned on may be switched in the order of R, G, B, and IR to read the image on the photographic film F.

In the above description, an image reading apparatus that reads a film image line by line using a line CCD has been described as an example. However, the present invention is applied to an image reading apparatus that reads an image frame by frame using an area CCD. You may.

In the above description, IR light is used at the time of image reading in order to detect scratches and dust on the photographic film F. However, it is not necessary to use it.

In the above description, the transparent original reading apparatus of the present invention has been described as an example in which the present invention is applied to an image reading apparatus for reading an image recorded on a photographic film. The present invention may be applied to a target transparent document reading apparatus.

[0069]

As described above, the present invention has an excellent effect that a small transparent original reading apparatus can be provided with a small loss of light quantity.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a digital laboratory system according to an embodiment of the present invention.

FIG. 2 is an external view of a digital laboratory system.

FIG. 3 is a perspective view illustrating a detailed configuration of a light source unit.

FIG. 4 is a top view showing a detailed configuration of a light source unit viewed from a photographic film side.

FIG. 5 is a schematic configuration diagram of a light source unit according to another embodiment.

FIG. 6 is a schematic configuration diagram of a conventional light source unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Digital laboratory system 14 Line CCD scanner part (transmission original reading device) 16 Image processing part 18 Laser printer part 20 Processor part 30 Line CCD (photoelectric conversion element) 32 A / D converter 80 Light source part 82 Optical fiber unit (optical fiber bundle) 82A Lower end surface (light source side end surface) 82B Upper end surface (transparent original side end surface) 84 Film carrier 86 Lens unit 90R, 90G, 90B, 90IR LED light source (light emitting element) 92R, 92G, 92B, 92IR Lens (light collecting member) F Photographic film (transparent original)

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G03B 27/54 G06F 15/64 320E G06T 1/00 H04N 1/04 DF term (reference) 2G065 AA04 AB02 AB04 AB09 AB23 AB26 AB28 BA04 BA33 BB02 BB49 BC11 BC28 BC31 BC33 BC35 BD01 DA17 DA18 2H046 AA34 AA69 AD09 AZ11 2H109 AA13 AA98 5B047 AA05 AB04 BC08 BC11 5C072 AA01 BA01 BA02 CA05 CA07 DA08 QA11 VA03

Claims (9)

[Claims] 1. A transmissive original reading device that irradiates a transparent original with light and reads a transmitted image by a photoelectric conversion element, comprising: a light source unit including a plurality of light emitting elements; Is provided, one end face is an irradiation area of the light source unit, and the other end face is an irradiation area on the transmissive document, and the light output from the light source unit is near the irradiation surface of the transmissive document. A transparent document reading device, comprising: an optical fiber bundle for guiding; 2. The transparent original according to claim 1, wherein the light source unit includes a light collecting member that collects light output from the light emitting element and makes the light incident on the optical fiber bundle. Reader. 3. A contour shape formed by arranging light emitting elements of the light source unit, and a shape of an end face of the optical fiber bundle on the light source unit side are substantially the same. 3. The transparent original reading device according to claim 1 or 2. 4. The optical fiber bundle according to claim 1, wherein the optical fiber bundle is formed so that the relative positional relationship between the optical fibers is different between the light source unit side end surface and the transmission original side end surface. 7. The transparent original reading device according to claim 1. 5. The light source unit according to claim 1, wherein a plurality of the light source units are provided for each light emitting element that outputs light in a different wavelength band. Transparent original reading device. 6. The light source unit according to claim 1, wherein the light source unit includes a plurality of types of light emitting elements that output light in different wavelength bands. Transparent original reading device. 7. The light of the different wavelength band is incident on the same region of the end face of the optical fiber bundle on the light source unit side, and the optical fiber bundle combines and emits the light of the different wavelength band. The transparent document reading device according to claim 5 or 6, wherein: 8. The light of the different wavelength bands, for each wavelength band,
6. The optical fiber bundle is incident on different predetermined regions of the light source unit side end face, and the optical fiber bundle emits light along different optical axes for each of the wavelength bands. 7. 7. The transparent original reading device according to 6. 9. The transparent document side end face of the optical fiber bundle is formed in a line shape, and the photoelectric conversion elements are linearly arranged in the same direction as the transparent document side end face of the line formed optical fiber bundle. 9. The transmission according to claim 1, wherein an image is recorded while moving the transmission original in a direction orthogonal to a direction in which the photoelectric conversion elements are arranged in a line. Document reading device.