JP2002318428A - System and method for inspecting light source of image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and accurately perform inspection of a light source of an image reader. SOLUTION: An area CCD scanner (image reader) 3 is provided with an LED unit (light source) 23, an area CCD 24 and an image forming lens 25. Many light emitting elements of the respective colors as B, G, R, IR are arranged in the LED unit 23. The area CCD 24 receives light emitted from the LED unit 23 and transmitting a photographic film 21, to convert it into an electric signal and outputs it as photographic image data. When the inspection of the light source is performed, a focal position of the image forming lens 25 is adjusted to the light emission surface of the LED unit 23 by transfer mechanism 28. The LED unit 23 is emitted without setting the photographic film 21 and the light is received by the optical area CCD 24. An emission state of the LED unit 23 is displayed on a display based on an obtained electric signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source inspection system and method for an image reading apparatus having a light source and photoelectric conversion means.

[0002]

2. Description of the Related Art There are known image reading apparatuses, such as a reflection original scanner and a photo film scanner, for photoelectrically reading an image recorded on an original. The image reading apparatus includes a light source that irradiates light to a document, and a photoelectric conversion unit that converts received light into an electric signal and outputs the electric signal.

As photoelectric conversion means, for example, a CCD
(Charge Coupled Device) is used, and as the light source, for example, an LED unit is used. LED
The unit includes a large number of light emitting elements that emit light of each color of blue (B), green (G), and red (R) and light emitting elements that emit infrared light (IR). The IR light is used to detect dust, dirt, film scratches, and the like attached to the photographic film, and to specify the location. Image correction is performed based on the data obtained by the infrared light.

When each of these light emitting elements or a driver for controlling the light emitting elements breaks down, some of the light emitting elements do not turn on or the amount of light decreases. When such a failure of the light source occurs in each of the B, G, and R light emitting elements, it causes a light quantity shortage of the print screen and uneven light quantity generated on the screen. Also, if it occurs in an IR light emitting element, it becomes impossible to correct dust, dust, film damage, and the like. For this reason, the light source is inspected periodically or as needed to confirm the light emitting state of each light emitting element.

[0005] The inspection of the light source is performed, for example, by visually observing the LED unit with each light emitting element emitting light for each color. For each of the R, G, and B light emitting elements, the light emitting state is confirmed by directly observing the light of each color. On the other hand, since the IR light is invisible light, the IR light emitting elements are passed through an IR scope. The state of light emission was confirmed by visual inspection of infrared light.

[0006]

SUMMARY OF THE INVENTION However, LEDs
Since a large number of light emitting elements are arranged at very narrow intervals in the unit, there is a problem that a failed light emitting element is difficult to find. In addition, since a tool such as an IR scope is required to inspect the light emitting element for IR, there is a problem that the operation is troublesome. Furthermore, when the light emission intensity of each light emitting element is high, direct observation of the light emitting element may adversely affect the eyes.

[0007] In order to solve the above-mentioned problems, an object of the present invention is to accurately and simply inspect a light source used in an image reading apparatus without adversely affecting the eyes.

[0008]

In order to achieve the above object, a method for inspecting a light source of an image reading apparatus according to the present invention comprises: a light source comprising a plurality of light emitting elements; And a photoelectric conversion means for converting the light into an electric signal, wherein in the inspection method of the light source of the image reading apparatus for reading the image recorded on the original, the light from the light emitting elements is received by the photoelectric conversion means, and The light emitting state of each of the light emitting elements is displayed on a display based on the obtained photoelectric signal and inspected.

The image reading device is provided on an optical path between the light source and the photoelectric conversion means, and detachably includes a diffusion member for diffusing light from each of the light emitting elements when reading the target image. The light emitting state is displayed on a display with the diffusion member removed.

[0010] The image reading device is arranged on an optical path between the light source and the photoelectric conversion means, and a first position at which the image is formed on the photoelectric conversion means, and an image of the light source is transmitted to the photoelectric conversion means. An image forming lens which is movable between a second position where the image is formed by the conversion means; and the light emitting state is displayed on a display in a state where the image forming lens is set at the second position.

An inspection system for a light source of an image reading apparatus according to the present invention includes a light source including a large number of light emitting elements, and photoelectric conversion means for receiving light emitted from the light source to a document and converting the light into an electric signal. In a light source inspection system of an image reading device that reads an image recorded on a document,
An image forming means for forming a test image representing a light emitting state of each of the light emitting elements based on a photoelectric signal obtained from the photoelectric conversion means, and a display for displaying the test image are provided. .

[0012] The image reading apparatus is provided on a light path between the light source and the photoelectric conversion means, and includes a diffusing member for diffusing light from each of the light emitting elements when reading the image. The diffusion member is detachable so that the inspection image can be formed with the diffusion member removed.

A first position at which an image formed on a document is formed on the photoelectric conversion unit by an imaging lens disposed on an optical path between the light source and the photoelectric conversion unit; Is formed so as to be movable between a second position where the image of the light source is formed on the photoelectric conversion unit when forming the image.

The inspection image is formed so that the arrangement state of each light emitting element can be recognized. The light source includes a light emitting element that emits infrared light.

According to another aspect of the present invention, there is provided a method for inspecting a light source of an image reading apparatus, comprising: a light source including a plurality of light emitting elements; In a method for inspecting a light source of an image reading apparatus that reads an image recorded on a document, the photoelectric conversion unit receives light from each of the light emitting elements, and based on an output level of an obtained photoelectric signal, It is characterized in that the light emitting element checks the light emitting state and automatically determines whether or not the test is successful based on the result.

The image reading apparatus is provided on an optical path between the light source and the photoelectric conversion means, and detachably includes a diffusing member for diffusing light from each of the light emitting elements when reading the image. The determination is performed with the diffusion member removed.

The image reading device is arranged on an optical path between the light source and the photoelectric conversion means, and a first position at which the image is formed on the photoelectric conversion means, and an image of the light source is stored in the photoelectric conversion means. An image forming lens that is movable between a second position where an image is formed on the conversion unit; and the determination is performed in a state where the image forming lens is set at the second position.

According to another aspect of the present invention, there is provided a light source inspection system for an image reading apparatus, comprising: a light source including a number of light emitting elements; In a light source inspection system of an image reading device that reads an image recorded on a document, a light emitting state of each light emitting element is checked based on an output level of a photoelectric signal obtained from the photoelectric conversion unit. It is characterized in that a determination means for automatically determining pass / fail of the inspection based on the determination is provided.

The image reading device has a diffusing member disposed on an optical path between the light source and the photoelectric conversion means, and diffusing light from each of the light emitting elements when reading the image. The diffusion member is detachably provided so that the inspection can be performed with the diffusion member removed.

A first position at which an image recorded on a document is formed on the photoelectric conversion unit by an imaging lens disposed on an optical path between the light source and the photoelectric conversion unit, and the inspection is performed. In this case, the light source is provided so as to be movable between a second position where an image of the light source is formed on the photoelectric conversion unit. The light source includes a light-emitting element that emits infrared light.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A digital print system 2 shown in FIG.
It comprises a display 5, a laser printer 6, and a processor 7. The area CCD scanner 3, the control unit 4, the display 5, and the operation unit 11, which are image reading devices, are integrated as an input device 8, and the laser printer 6 and the processor 7 are integrated as an output device 9.

The display 5 has an operation screen and an area CC.
The image read by the D scanner 3 is displayed.
The operation unit 11 includes a mouse and a keyboard, and inputs various commands to the control unit 4. The operator operates the operation unit 11 while looking at the operation screen to operate the control unit 1.
Various commands are given to 0. The control unit 4 controls each unit of the input device 8 and the output device 9 according to the input command.

As is well known, the laser printer 6 has R,
A laser exposure unit including laser light sources for G and B, a polygon mirror, an Fθ lens, a reflection mirror, and the like is provided, and a latent image is recorded on color paper based on recording image data sent from the input device 8. The processor 7 performs a development process on the printed color paper.

The input device 8 has two operation modes, an image reading mode and an inspection mode. The image reading mode is a mode that is normally used, and reads an image of each frame of the photo film 21. The scanned image is
It is sent to the output device 9 and printed. The inspection mode is a mode for inspecting the light source of the area CCD scanner 3, and in this mode, the input device 8 functions as an inspection system for the light source. When the input device 8 is started, a mode selection screen is displayed on the display 5, and each operation mode is selected on this mode selection screen.

The control unit 4 comprises a CPU, a memory, a storage for storing various data, an image processing unit 10 and the like. The storage stores a program for operating the input device 8 in each of these modes. ing. CP
U loads these programs into the memory and executes them.

The image processing section 10 performs various image processing such as density correction, color correction, and sharpness processing on the photographic image data read by the area CCD scanner 3 in the image reading mode. Then, the processed photographic image data is converted to the recording image data and sent to the laser printer 6. On the other hand, in the inspection mode,
An inspection image representing the light emission state of the light source of the area CCD scanner 3 is formed. This inspection image is displayed on the display 5.

As shown in FIG. 2, the area CCD scanner 3 comprises a film carrier 22, an LED unit 23, an area CCD 24, and an imaging lens 25. The film carrier 22 transports the set photo film 21. The LED unit 23 is attached to the photo film 21,
It is a light source that emits light of each color of B, G, R, and IR. The area CCD 24 has the L
It is arranged at a position facing the ED unit 23. L
Optical path 26 between ED unit 23 and area CCD 24
Above, an imaging lens 25 is arranged.

The image forming lens 25 is provided with a first position for forming an image of the photographic film 21 on the area CCD 24,
The light emitting surface of the D unit 23 is provided movably between a second position where an image is formed on the area CCD 24. The moving mechanism 28 moves the imaging lens 25 between the first and second positions. In the image reading mode, the imaging lens 25 is set at the first position, and in the inspection mode, it is set at the second position.

As is well known, the area CCD 24 is a photoelectric conversion means for converting received light into an electric signal and outputting the electric signal. In the image reading mode, the area CCD 24
The photo film 21 is irradiated from the ED unit 23 and receives the light transmitted through the photo film 21. Area CCD
The photoelectric signal converted by 24 is converted into digital data by an A / D converter, and the data is taken into the image processing unit 10 as photographic image data.

In this image reading, a pre-scan and
There is a fine scan that reads at a higher resolution than the pre-scan. The pre-scan is performed when the image of each frame is preview-displayed on the display 5. The fine scan is a scan performed when printing is performed, and image data for recording is created from this data.

The LED unit 23 comprises B, G, R, IR
Sequentially emit light for each color. Each of these color lights is area CCD
The light of each color is received, and the light of each color is converted into B image data, G image data, R image data, and IR image data, and is taken into the image processing unit 10.

As is well known, the IR light is a light for detecting the position of dust adhering to the photographic film and the position of the film flaw. The image processing unit 10 uses the IR image data to detect the dust and the film. The position of the flaw is specified, and correction processing is performed on this portion.

In the inspection mode, the area CCD 24
The light emitted by the ED unit 23 is directly received and output as an electric signal. The electric signal is converted into digital data by the A / D converter 27, and the data is taken into the image processing unit 10 as light emission state data indicating the light emission state of the LED unit 23. Image processing unit 10
Forms an inspection image based on the light emission state data, and outputs this to the display 5.

It is assumed that the area CCD 24 directly receives the light emitted by the LED unit 23. For example, a filter having a constant density over the entire surface is inserted between the LED unit 23 and the area CCD 24. May be received by the area CCD 24.

On the optical path 26, a diffusion member 31 is disposed between the LED unit 23 and the film carrier 22. The diffusion member 31 is formed, for example, in a substantially rectangular tube shape, and the inner surface of the tube is a reflection surface. LED unit 2
The light emitted from the photographic film 2 travels straight and directly enters the photographic film 21, and is reflected by the reflection surface.
Incident on 1.

Since the LED unit 23 is composed of a large number of light-emitting elements, if some of the light-emitting elements fail, the amount of light at that portion decreases. When the light amount is reduced, the capability of the image reading process is reduced. In addition, since the light amount is partially reduced, the light amount becomes uneven on the screen.
The diffusing member 31 prevents the light amount unevenness by diffusing the light.

However, when inspecting the light emitting state of each light emitting element, if the light of each light emitting element diffuses, it becomes difficult to understand the light emitting state of each light emitting element. Therefore, the diffusion member 31 is provided detachably so that the light source can be removed when inspecting the light source. Thereby, at the time of inspection, light diffusion of each light emitting element is prevented,
A clear inspection image can be formed, and the light emitting state of each light emitting element can be easily checked.

As shown in FIG. 3, the LED unit 23
Are the light emitting element set for B 36 and the light emitting element set 3 for G
7, R light emitting element set 38, IR light emitting element set 3
Consists of nine. Each of the light emitting element sets 36 to 39 includes three light emitting elements. As shown in the example of the light emitting element set for B 36, three light emitting elements 36a, 36b, 36c
Are wired and connected in series. The same applies to the light-emitting element sets 37 to 39 of other colors, and thus the description is omitted.

The area in which the light emitting element sets 36 to 39 are arranged is divided into two areas, an upper part and a lower part.
In each of these areas, each light emitting element set 36 to 39
From the end, B, G, R, and IR are repeatedly arranged in this order. 1
For example, five light emitting element sets 36 for B
Row, other light emitting element sets 37 for G, R, IR
39 are provided in four rows.

As shown in FIG. 4, a light source inspection screen 41 is displayed on the display 5 in the inspection mode. The screen 41 is divided into two areas, a light emission state confirmation area 41a and a setting section display area 41b for performing various settings at the time of inspection.

The image processing unit 1 is provided in the light emission state confirmation area 41a.
The inspection image 43 formed at 0 is displayed. The inspection image 43 includes a number of blocks 42 corresponding to each light emitting element. The display color of each block 42 is, for example, blue for the light emitting element for B, green for the light emitting element for G, red for the light emitting element for R,
The IR light emitting element is determined so that the color of the light emitting element corresponding to each block 42 can be identified, such as white. By doing so, it is possible to easily confirm which color of the light emitting element has failed. Of course, instead of changing the color, B,
By providing a symbol representing each color, such as G, R, and IR, identification may be performed.

Each block 42 includes an area CCD 2
The density changes in accordance with the output level of the signal sent from the control unit 4. That is, when each light emitting element emits light normally, the output level is high, so that the display is bright, and when the output level is low, such as when the light amount is low or off, the display is dark.

For example, when the light emitting element set 36 at the upper left end fails and all the light emitting elements 36a to 36c are turned off, the three blocks 42 corresponding to the light emitting elements 36a to 36c are displayed dark ( (Indicated by hatching in the figure)
Is done. The inspector looks at the display and sees the light emitting element set 36.
You can know the failure.

Further, the blocks 42 are arranged so that the arrangement state of the light emitting elements can be understood, and the light emitting state is displayed for each block 42. Therefore, it is easy to specify the number of faulty light emitting elements and their positions. is there.

This identification is facilitated. For example, if a certain number of light emitting elements have failed, the LED
By exchanging the unit 23, a clear criterion can be created for the inspector to judge whether to replace the LED unit 23 or not. Thereby, when the same level of failure occurs, the judgment of necessity of replacement does not change due to, for example, different inspectors, and it is possible to give each inspector a certain degree of objectivity. .

The lighting color setting section 4 is provided in the setting section area 41b.
6, display update button 47, current value setting section 48, end button 49, and the like are displayed. Each setting unit and buttons are operated by a mouse and a keyboard. The lighting color setting section 46 sets the color of the light emitting element to be turned on. The lighting color setting section 46 is provided with a check box 46a for each color of B, G, R, and IR. Is the light emission state confirmation area 4
1a. Thus, the light emitting state of each light emitting element can be confirmed for each color.

When the display update button 47 is clicked, the inspection image is recreated and updated to the latest one. The current value setting unit 48 sets a current value given to the light emitting element for each color. Thus, the light amount level of the light emitting element can be changed for each color. The current value is input from a keyboard. The input current value is displayed in an input box 48a provided for each color. When the setting button 48b is clicked, each light emitting element is turned on again at the input current value. When the end button 49 is clicked, the inspection mode ends.

Hereinafter, the inspection procedure of the light source having the above configuration will be described with reference to the flowchart shown in FIG.
When inspecting the light source, first, the diffusion member 31 is removed, the input device 8 is activated, and the inspection mode is selected. An instruction to display an inspection image is given along with the mode selection. Thereby, first, the moving mechanism 28 is operated, and the imaging lens 25 is set to the second position. The LED unit 23 emits light sequentially for each color. These areas of light are received by the area CCD 24. The area CCD 24 converts the received light into an electric signal, and the electric signal is converted into digital data (light emission state data) by the A / D converter 27. The image processing unit 10 forms the inspection image 43 based on the light emission state data. And this inspection image 4
3 is displayed in the light emission state confirmation area 41a.

In the inspection mode, since the diffusion member 31 is removed and the imaging lens 25 is set at the second position, the light emitting state of each light emitting element can be clearly displayed. For this reason, it is easy to specify a defective portion.

The inspector checks the light emitting state such as whether or not each light emitting element is turned on while looking at the inspection image 43. Then, based on the number of failure points and the failure status such as their location, LED
The unit 23 checks whether or not a predetermined inspection pass criterion has been reached. If the unit 23 has reached the inspection pass criterion, the unit 23 determines that the inspection has passed, and ends the inspection. On the other hand, when the inspection pass standard has not been reached, it is determined that the inspection has failed, and the LED unit 23 is replaced.

In the above example, an inspection image indicating the light emitting state of the light source is displayed on the display, and the inspector confirms the inspection image to determine whether or not the inspection is successful. May automatically determine whether or not the inspection is successful based on the light emitting state of each light emitting element.

In this case, a determination unit 53 is provided in the control unit 52 as in an input device 51 shown in FIG. Then, the data of the inspection pass criterion is stored in the memory 54 in advance. As shown in the flowchart of FIG. 7, the image processing unit 10 checks the light emitting state of each light emitting element according to the output level of the signal from the area CCD 24. That is, it is automatically detected whether or not each light emitting element has failed, and the color, the number and the position of the failed light emitting element are specified.
These data are sent to the determination unit 53 as failure data.

The judging section 53 checks whether or not the LED unit 23 has reached the inspection pass criterion based on the failure data and the inspection pass criterion data. Is determined. If the inspection has passed, for example, a pass message is displayed on the display 5. On the other hand, if the inspection pass standard has not been reached, the determination unit 53 determines that the inspection has failed. If the inspection fails, for example, a failure message is displayed on the display 5. Of course, these messages may be output by voice or the like. Alternatively, the message may be output when either the pass or the reject has occurred, and may not be output when the other has occurred.

In the above example, the arrangement in the LED unit is not limited to the above, and various arrangements are conceivable. For example, in the above example, three light-emitting elements are set, but the light-emitting elements may not be set. Further, although two areas of an upper row and a lower row are provided, they may be divided into four areas.

In the above example, a description has been given of an example of a scanner that uses a photo film as an original and reads an image of the photo film. A reflection original scanner that reflects the light with paper and reads the reflected light with a CCD may be used.

In the above example, an example using an area CCD scanner has been described, but a line CCD scanner for reading an image line by line may be used.

[0057]

As described in detail above, the present invention provides
Inspection of a light source of an image reading apparatus that includes a light source composed of a large number of light emitting elements and photoelectric conversion means for receiving light emitted from the light source onto a document and converting the light into an electric signal, and reading an image recorded on the document. In this case, the light from each of the light-emitting elements is received by the photoelectric conversion means, and the light-emitting state of each of the light-emitting elements is displayed on a display based on the obtained photoelectric signal, and the inspection is performed. The light source can be easily inspected without using an inspection tool such as a scope. Further, since the light source is not directly viewed, there is no adverse effect on the eyes.

When displaying the light emission state on a display, a diffusion member disposed on an optical path between the light source and the photoelectric conversion means may be removed, or the focal position of the imaging lens may be set to the light source. Since they are matched, the inspection can be performed with high accuracy.

Further, the light from each of the light emitting elements is received by the photoelectric conversion means, the light emitting state of each of the light emitting elements is checked based on the output level of the obtained photoelectric signal, and the judgment means is determined based on the result. As a result, the pass / fail of the inspection is automatically determined, so that the light source can be inspected more easily and accurately.

Further, since the photoelectric conversion means of the image reading device is used and the image processing unit of the input device is used,
The cost of the inspection system can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a digital print system.

FIG. 2 is a configuration diagram of an area CCD scanner.

FIG. 3 is an explanatory diagram showing an arrangement of each light emitting element of the LED unit.

FIG. 4 is an explanatory diagram of a light emission state confirmation screen.

FIG. 5 is a flowchart showing a procedure for inspecting a light source.

FIG. 6 is a configuration diagram of an input device that automatically performs pass / fail determination.

FIG. 7 is a flowchart showing the inspection procedure of FIG.

[Explanation of symbols]

 3 area CCD scanner 5 display 8, 51 input device 10 image processing unit 23 LED unit 24 area CCD 41 light source inspection screen 43 inspection image 53 judgment unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H109 AA26 AB23 AB61 CA17 DA11 5C062 AB03 AB17 AB23 AB41 AB42 AC55 AD05 5C072 AA01 CA05 CA07 CA17 DA02 DA16 DA21 DA23 EA05 EA08 VA03

Claims (15)

[Claims] 1. An image reading apparatus comprising: a light source comprising a number of light emitting elements; and a photoelectric conversion means for receiving light emitted from the light source onto a document and converting the light into an electric signal, and reading an image recorded on the document. In the inspection method of the light source of the device, the photoelectric conversion unit receives light from each of the light emitting elements,
A method for inspecting a light source of an image reading apparatus, comprising displaying a light emitting state of each of the light emitting elements on a display based on the obtained photoelectric signal and performing inspection. 2. The image reading device is disposed on an optical path between the light source and the photoelectric conversion unit, and has a detachable detachable diffusion member for diffusing light from each of the light emitting elements when reading the target image. 2. The method according to claim 1, wherein the light emitting state is displayed on a display with the diffusion member removed. 3. The image reading device is disposed on an optical path between the light source and the photoelectric conversion unit, and a first position at which the image is formed on the photoelectric conversion unit, and an image of the light source. An image forming lens movable between a second position for forming an image on the photoelectric conversion means and displaying the light emitting state on a display in a state where the image forming lens is set at the second position; The inspection method of a light source of an image reading device according to claim 1 or 2, wherein 4. An image reader for reading an image recorded on a document, comprising: a light source comprising a number of light emitting elements; and a photoelectric conversion means for receiving light emitted from the light source onto the document and converting the light into an electric signal. In the light source inspection system of the device, an image forming unit that forms an inspection image representing a light emitting state of each of the light emitting elements based on a photoelectric signal obtained from the photoelectric conversion unit, and a display that displays the inspection image. An inspection system for a light source of an image reading device, comprising: 5. The image reading device according to claim 1, further comprising a diffusing member disposed on an optical path between the light source and the photoelectric conversion unit, and diffusing light from the light emitting elements when reading the image. 5. The inspection system for a light source of an image reading apparatus according to claim 4, wherein the diffusion member is detachable so that the inspection image can be formed with the diffusion member removed. 6. A first position at which an imaging lens arranged on an optical path between the light source and the photoelectric conversion unit forms an image recorded on a document on the photoelectric conversion unit, and the inspection position. The light source of the image reading apparatus according to claim 4, wherein the image of the light source is movably provided to a second position where the image of the light source is formed on the photoelectric conversion unit when forming an image for use. Inspection system. 7. The inspection system for a light source of an image reading apparatus according to claim 4, wherein the inspection image is formed so that an arrangement state of the light emitting elements can be recognized. 8. The inspection system for a light source of an image reading apparatus according to claim 4, wherein the light source includes a light emitting element that emits infrared light. 9. An image reading apparatus comprising: a light source comprising a number of light emitting elements; and photoelectric conversion means for receiving light emitted from the light source onto a document and converting the received light into an electric signal, and reading an image recorded on the document. In the inspection method of the light source of the device, the photoelectric conversion unit receives light from each of the light emitting elements,
A method for inspecting a light source of an image reading apparatus, comprising: checking a light emitting state of each light emitting element based on an output level of an obtained photoelectric signal; and automatically determining whether the inspection is successful or not based on the result. 10. The image reading device is disposed on an optical path between the light source and the photoelectric conversion means, and detachably attaches a diffusing member that diffuses light from each of the light emitting elements when reading the image. 10. The apparatus according to claim 9, wherein the determination is performed in a state where the diffusion member is removed.
The inspection method of the light source of the image reading device according to the above. 11. The image reading device is disposed on an optical path between the light source and the photoelectric conversion unit, and a first position at which the image is formed on the photoelectric conversion unit, and an image of the light source. An imaging lens movable to and from a second position where an image is formed on the photoelectric conversion unit, and the determination is performed in a state where the imaging lens is set at the second position. The method for inspecting a light source of an image reading device according to claim 9. 12. An image reader for reading an image recorded on a document, comprising: a light source comprising a number of light emitting elements; and photoelectric conversion means for receiving light emitted from the light source to the document and converting the light into an electric signal. In the inspection system for the light source of the apparatus, a light emitting state of each of the light emitting elements is checked based on an output level of a photoelectric signal obtained from the photoelectric conversion means, and a determination unit that automatically determines whether or not the inspection is successful based on the result. An inspection system for a light source of an image reading device, comprising: 13. The image reading device according to claim 1, further comprising: a diffusing member disposed on an optical path between the light source and the photoelectric conversion unit, for diffusing light from each of the light emitting elements when reading the image. 13. The inspection system for a light source of an image reading apparatus according to claim 12, wherein the diffusion member is provided detachably so that inspection can be performed with the diffusion member removed. 14. A first position at which an imaging lens arranged on an optical path between the light source and the photoelectric conversion unit forms an image recorded on a document on the photoelectric conversion unit, and the inspection 14. A light source inspection system for an image reading apparatus according to claim 12, wherein the image reading device is provided so as to be movable between a second position where the image of the light source is formed on the photoelectric conversion means when performing the image reading. . 15. The light source according to claim 12, wherein the light source includes a light emitting element that emits infrared light.
The inspection system for a light source of the image reading device according to any one of the above.