JPH07312674A - Image reader - Google Patents

Abstract

PURPOSE:To prevent an abnormal image due to the deformation of a frame or an optical system in the frame or the abnormal output of a sensor by releasing the periphery of a light source to the outside and radiating heat of the light source to the outside. CONSTITUTION:An original P on contact glass 11 is irradiated with the light of the light source 6, and reflected light from the original P is made incident on the aperture part 20A of the frame 20. Such incident light is made incident on a roof mirror lens array(RMLA) 1, and is reflected on a roof mirror array(RMA) 3. then, it is introduced to a sensor IC 7. The image of the original P is printed out on an image recorder based on image information received by the sensor IC 7. In such a way, since the heat from the light source 6 is radiated to the outside, the frame 20 can be prevented from being filled with the heat, which eliminates an adverse effect on the sensor IC 7 by the heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus applied to a facsimile machine, a scanner, a copying machine and the like, and more particularly to an image reading apparatus which employs an array-magnification imaging element in its optical system.

[0002]

2. Description of the Related Art In a sensor used in a reading section of a facsimile machine or the like, its optical system includes a roof mirror lens array (RMLA) and a selfoc lens array (S
An array equal-magnification imaging element such as LA) is employed.

FIG. 13 (a) is a structural diagram showing the overall structure of a roof mirror lens array (hereinafter referred to as RMLA) optical system. In FIG. 13 (a), 1 is RMLA, 2 is a lens array (hereinafter referred to as LA), 3 is a roof mirror array (hereinafter referred to as RMA), 4 is an optical path separation mirror, and RMLA1 is mainly a plastic. It is composed of LA2 and RMA3 which are integrally formed by molding.

FIG. 13 (b) is an explanatory view showing the image formation of a unit lens system composed of a unit lens and a unit roof mirror, which are components of RMLA. The RMLA 1 is based on a configuration in which a large number of unit lens systems of FIG. 13 (b) are arranged in the Y-axis direction in the figure. In FIG. 13B, the object (o) is displayed as an image (i) in which the whole is erected by the unit lens system.

In RMLA1, a plurality of images (i) obtained from a plurality of lens groups are overlapped to form a whole image. As shown in FIG. 13 (a), in the case of RMLA, the optical path separation mirror 4 separates the light from the object side and the image side.

FIG. 14 is a configuration diagram showing a configuration in which the RMLA optical system is mounted on a contact image sensor, 5 is a contact image sensor, 6 is a light source, 7 is a sensor IC, and 8 is a sensor substrate on which the sensor IC 7 is mounted. , 9 is a frame, 10 is L
2 shows a diaphragm plate arranged between A2 and RMA3. The frame 9 is provided with three housings for housing the RMLA 1, the light source 6 and the sensor board 8. The RMLA 1, the light source 6 and the sensor board 8 are mounted in a predetermined housing of the frame 9, and the optical path is separated in front of the LA 2. The contact image sensor 5 is configured by installing the mirror 4.

Further, in FIG. 14, reference numeral 11 denotes a contact glass, and the contact image sensor 5 is arranged below the contact glass 11. And contact glass
A document P having an image to be read is placed on the document 11, and the contact image sensor 5 is moved while irradiating the document P with light, so that the contact image sensor 5 reads the image of the document P.

FIG. 15 shows a Selfoc lens array (hereinafter,
(Referred to as SLA) is a configuration diagram showing a contact image sensor, in which 12 is an SLA that is an image-forming element of the array unit size,
13 is a light source, 14 is a sensor IC, 15 is a sensor board on which the sensor IC 14 is mounted, 16 is a frame that houses the SLA 12, the light source 13, the sensor board 15, etc., 17 is a close contact in which various members are housed in the frame 16. The image sensor 18 is a contact glass disposed above the contact image sensor 17.

In the image reading, as in the case of the above-mentioned RMLA, an original having an image to be read is placed on the contact glass 11, and the contact image sensor 5 is moved while the light source 13 irradiates the original with light. By doing so, the contact image sensor 5 reads the image of the document. At that time, the reflected light from the original enters the SLA 12,
12 forms an image of the reflected light at the same size on the sensor IC 14 located below the SLA 12.

Conventionally, as an example of an image reading apparatus which employs an array-magnification image forming element, there are techniques described in Japanese Patent Application Laid-Open Nos. 4-229760 and 61-278265.

Japanese Unexamined Patent Publication No. 4-229760 describes an image reading apparatus that employs RMLA as an imaging element, and Japanese Unexamined Patent Publication No. 61-278265 discloses that an SLA is employed as an imaging element. The described facsimile sensor unit is described.

[0012]

FIG. 16 is a graph showing the output temperature characteristic of the sensor IC. As shown in FIG. 16, the output of the sensor IC is not a problem at room temperature, but the sensor IC increases as the ambient temperature rises. It has the characteristic that the output of the IC rises and enters an abnormal output state.

However, the light source used in the image reading apparatus is often a considerably high temperature such as a fluorescent lamp, and when the environment temperature is high, the influence of heat generation of the light source on the sensor IC and the optical element can be ignored. There is a problem that the abnormal image is remarkably generated due to the increase in the sensor output.

Further, since the expansion coefficient of the member of the optical system is different from that of the member of the frame, the temperature rise of the frame itself causes the deterioration of the MTF characteristic and the output change, and at the same time, the problem of the image deterioration occurs.

In the technique disclosed in Japanese Patent Laid-Open No. 4-229760, no particular consideration is given to the influence of heat generated by the light source. Further, in the technique disclosed in Japanese Patent Laid-Open No. 61-278265, in order to suppress the influence of heat generation of the light source, the light source is placed in a chamber provided apart from the portion of the document surface to be irradiated with light, and the intermediate A fluorescent flat plate concentrator is provided to guide the light from the light source to the original surface, but the amount of light is reduced by separating the light source from the original surface, and it is also costly to provide the fluorescent flat plate concentrator. Connect.

An object of the present invention is to solve the above problems and to provide an image reading apparatus in which the influence of heat generation of a light source on a sensor IC is suppressed.

[0017]

In order to achieve the above object, the present invention provides an array-magnification image forming element having a lens array in which a plurality of lenses are continuously formed, and a light source for irradiating a document with light. And a sensor for receiving the reflected light from the original image in which the array equal-magnification imaging element forms an equal-magnification image, and a frame in which the array equal-magnification imaging element, the light source, the sensor, and the like are installed inside. An image reading apparatus including the above is characterized by adopting the configuration described below.

(1) The frame is provided with an opening through which reflected light from a document incident on the array-magnification imaging element passes and an opening through which heat of the light source is radiated to the outside. .

(2) The present invention is characterized in that gripping portions for gripping both ends of the light source with the tube surface of the light source exposed to the outside are provided at both ends in the longitudinal direction of the frame.

(3) In the configurations of (1) and (2), a heat insulating means is provided on the wall surface of the frame facing the light source.

(4) In the configurations of (1) and (2), a transparent cover is provided at the opening of the frame through which the reflected light from the document passes.

(5) Time measuring means for measuring the image reading time by the contact image sensor is provided, and when the time measuring means measures a predetermined time, the light source is turned off to interrupt the image reading, and the light source is turned off for a predetermined time. It is characterized in that a control means for starting image reading after the above is provided.

(6) A temperature detecting means for detecting the temperature of the contact image sensor and a circuit means for monitoring the output of the temperature detecting means are provided, and this circuit means detects that the contact image sensor has risen to a predetermined temperature. When it is detected, the light source is turned off to generate a signal for interrupting the image reading, and when the circuit means detects that the contact image sensor has dropped to a predetermined temperature after the image reading is interrupted, a signal for starting the image reading is generated. It is characterized by occurring.

(7) The temperature detecting means for detecting the temperature of the contact image sensor and the image processing means for processing the output of the temperature detecting means and the contact image sensor are provided, and the contact image sensor has risen to a predetermined temperature. Is detected by the image processing means, a signal for interrupting the image reading is generated by turning off the light source, and when the image processing means detects that the contact image sensor has dropped to a predetermined temperature after the image reading is interrupted, It is characterized in that a signal for starting reading is generated.

(8) The array unity-magnification imaging element includes a lens array in which a plurality of lenses are continuously formed, and a roof mirror in which a plurality of roof-type reflecting surfaces are continuously formed at an arrangement pitch of the lens arrays. An optical path separation mirror that has an array, separates the reflected light from the original that is incident on the lens array, reflected by the roof mirror array, and passed through the lens array again, and allows the light to enter the sensor. It is characterized by being installed in.

(9) Array equal-magnification imaging element An array equal-magnification imaging element has a lens array in which a plurality of lenses are continuously formed, and this lens array forms an image of reflected light from an original on a sensor. It is characterized in that

(10) In the configurations of (5), (6) and (7), the temperature detecting means can detect the heat control signal of the light source.

(11) In the configurations of (6) and (7), the temperature detecting means is provided on the sensor substrate.

(12) In the configurations of (5), (6) and (7), the running body equipped with the contact image sensor is movable when the image reading is interrupted.

(13) In the configurations of (5), (6), (7), and (12), there is provided an informing means for informing that the image reading is a normal operation.

[0031]

With the configurations (1) and (2), since the periphery of the light source is opened to the outside, the heat generated by the light source is easily released to the outside.

According to the structure of (3), the heat radiated from the light source to the frame is blocked by the heat insulating material.

According to the structure of (4), the array equal-magnification imaging element and the like in the frame are protected from external dust.

According to the configurations of (5), (6), and (7), the image reading is interrupted and the light source is turned off before an abnormality occurs in the sensor due to heat generation of the light source and an abnormal image is generated. so,
The temperature rise of the contact image sensor is stopped.

With the configuration (8), the object image distance can be greatly reduced.

According to the structure (9), the assembling property is improved as compared with the structure (8) because the optical path separation mirror is not required.

According to the configuration of (10), the output of the temperature detecting means is used for both the heat control of the light source and the temperature detection of the contact image sensor.

With the configuration (11), it is possible to detect the temperature near the sensor.

According to the structure of (12), by moving the traveling body, the air flows near the light source, and the temperature decrease of the contact image sensor is promoted.

According to the configuration of (13), the user does not erroneously determine that a failure has occurred in the image reading device.

[0041]

Embodiments of the present invention will now be described in detail with reference to the drawings. The same members as those forming the contact image sensor according to the conventional image reading apparatus shown in FIG. 14 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a side view showing an essential part of a first embodiment of the present invention, and FIG. 2 is a perspective view showing the structure of the contact image sensor of FIG. 1, wherein 20 is a frame and 21 is a longitudinal direction of the frame 20. Side plates, which are grips provided at both ends of, and 22 are contact image sensors. As shown in FIG. 1, the RM is provided in the frame 20.
An LA 1, an optical path separating mirror 4, a sensor IC 7 and a sensor substrate 8 are installed. Further, as shown in FIG. 2, the light source 6 has its both ends gripped by the side plates 21,
It is located laterally of RMLA1 via the wall surface of RMLA1.

The contact image sensor 22 constructed as described above is arranged below the contact glass 11 as shown in FIG. Then, an original P having an image to be read is placed on the contact glass 11, and the original P
The image of the original P is read by the contact image sensor 22 by moving a scanning body (not shown) equipped with the contact image sensor 22 while irradiating light on the image.

The light source 6 irradiates the original P on the contact glass 11 with light, and the reflected light from the original P is the opening of the frame 20.
It is incident on 20a. This incident light enters RMLA1 and R
The light is reflected by the MA 3, the light is reflected by the optical path separation mirror 4, and is guided to the sensor IC 7. Then, based on the image information received by the sensor IC 7, the image of the document P is printed out by an image recording device (not shown).

According to the first embodiment constructed as described above, since the heat from the light source 6 is released to the outside, the heat is not trapped in the frame 20 and the sensor IC 7 is adversely affected by the heat. Is prevented.

FIG. 3 is a block diagram showing a second embodiment of the present invention, and 23 is a heat insulating material. In the second embodiment, as shown in FIG. 3, a heat insulating material 23 is attached to the wall surface of the frame 20 in the portion located between the RMLA 1 and the light source 6 in the first embodiment.

According to the second embodiment thus constructed, the heat radiated from the light source 6 to the wall surface of the frame 20 is heat insulating material.
Since it is blocked by 23, the frame 20 and the optical members are prevented from expanding and adversely affecting the RMLA 1.

FIG. 4 is a constitutional view showing a third embodiment of the present invention, and 24 shows a cover glass. In the third embodiment, as shown in FIG. 4, the opening 20 of the frame 20 in the first embodiment is used.
A cover glass 24 is attached so as to cover a.

According to the third embodiment thus constructed, the external dust is blocked by the cover glass 24, so that the external dust is prevented from adversely affecting the sensors and optical elements in the frame 20. To be done.

FIG. 5 is a block diagram showing a control system according to the fourth embodiment of the present invention, in which 25 is a reading unit motor for moving a traveling body (not shown) equipped with the contact image sensor 22, and 26 is a reading unit motor.
Reference numeral 27 denotes an operation unit for inputting commands to the apparatus main body, and 27 denotes a system control unit for controlling the contact image sensor 22, the reading unit motor 25, the operation unit 26 and the like.

FIG. 6 is a time chart showing the operation according to the fourth embodiment of the present invention. In the fourth embodiment, software (not shown) for measuring the time from the start of image reading and generating an ON / OFF signal of the light source 6 to the system control unit 27 when a predetermined time has elapsed is provided. It is equipped.

At the same time when image reading is started, the software starts timing. When the software measures the set time during image reading, the system control unit 27 is notified to that effect, and the system control unit 27 determines that the sensor IC 7 causes an output abnormality when the image reading is continued, and the image is displayed. Suspend reading. At this time, the light source 6 is turned off, and the traveling body (not shown) is moved to lower the temperature of the contact image sensor 22. Further, the fact that the operation is temporarily stopped is displayed on an LED (not shown) of the operation unit 26 of the apparatus body to notify the user. The interruption time is also set in the software in advance. Then, after the counting means has counted the predetermined time, the system control unit 27 is notified to that effect, and the system control unit 27 restarts the image reading operation.

According to the fourth embodiment thus constructed, the image reading is temporarily stopped and the heat is sufficiently dissipated before the output from the sensor IC 7 becomes abnormal due to the heat generated from the light source. Since the control for restarting is performed, the RMLA 1 and the sensor IC 7 are prevented from being adversely affected by heat, and as a result, an abnormal image is prevented from occurring.

FIG. 7 is a block diagram showing a control system according to the fifth embodiment of the present invention, in which 30 is a contact image sensor and 31 is a thermistor which is a temperature detecting means for detecting the temperature of the contact image sensor 30. The contact image sensor 30 is the same as the contact image sensor of the first embodiment except that the thermistor 31 is provided inside. The thermistor 31 is a sensor IC.
7 (see FIG. 1) and the sensor substrate 8 (see FIG. 1). 32 is an image processing circuit for processing the output from the sensor IC 7, 33 is a thermistor detection circuit for detecting the output of the thermistor 31, 34 is a control circuit for the contact image sensor 30, etc., including the image processing circuit 32, the thermistor detection circuit 33, etc. 2 shows a system control unit that performs

FIG. 8 is a graph showing the control operation in the fifth embodiment. The system control unit 34 monitors the temperature of the thermistor 31 at the same time when reading is started, and the sensor IC
When the output of No. 7 reaches a limit value temperature at which abnormal output does not occur as shown in FIG. 7, the image reading is temporarily stopped. At this time, similarly to the fourth embodiment, the light source 6 is turned off, and the running body (not shown) equipped with the contact image sensor 30 is mounted.
Is moved to lower the temperature of the contact image sensor 30. In addition, the fact that the suspension has been performed is displayed on the operation unit (not shown) of the apparatus body to notify the user.

After that, when the thermistor detection circuit 33 detects that the temperature of the contact image sensor 30 has dropped and reached the reading restart temperature, the system controller 34 restarts the image reading.

According to the fifth embodiment thus constructed, it is determined based on the output of the thermistor 31 whether or not the sensor IC 7 causes an output abnormality due to heat generation from the light source, and before the output abnormality occurs. In addition, since the image reading is temporarily stopped and the control is resumed after the heat radiation is sufficiently released, the RMLA1 and the sensor IC7 are adversely affected by the heat, and as a result, the abnormal image is generated. Is prevented.

FIG. 9 is a block diagram showing a control system according to a sixth embodiment of the present invention, in which 40 is a contact image sensor, 41 is a thermistor which is a temperature detecting means for detecting the temperature of the contact image sensor 40, and 42 is An analog multiplexer is shown.
The contact image sensor 40 is the same as the contact image sensor of the first embodiment except that the thermistor 41 and the analog multiplexer 42 are provided inside. The thermistor 41 is mounted on the sensor substrate 8 (see FIG. 1) together with the sensor IC 7. Reference numeral 43 denotes an image processing circuit that processes the output from the analog multiplexer 42, and 44 denotes a system control unit that includes the image processing circuit 43 and controls the contact image sensor 40 and the like.

The analog multiplexer 42 is constructed so that the effective pixel data which is the output of the sensor IC 7 and the output signal of the thermistor 41 can be separated and output on the video signal by the SEL signal from the system control section 44. ing. The video signal generated by the analog multiplexer 42 is a signal in which effective pixel data and thermistor output data are alternately switched as shown in FIG. Further, this video signal is input to the image processing circuit 43, effective pixel data is subjected to image processing, and the thermistor output data is processed as a signal for monitoring the temperature of the contact image sensor 40.

The system controller 44 monitors the temperature of the contact image sensor 40 based on the output of the thermistor 41, and prevents the sensor IC 7 from generating an abnormal output due to the heat of the light source 6 in the same manner as in the fifth embodiment. Control. The processing performed by the thermistor detection circuit 33 (see FIG. 7) in the fifth embodiment is performed by the image processing circuit 43 in the sixth embodiment.

According to the sixth embodiment thus constructed, it is determined based on the output of the thermistor 31 whether or not the sensor IC 7 causes an output abnormality due to heat generation from the light source, and before the output abnormality occurs. In addition, since the image reading is temporarily stopped and the control is resumed after the heat radiation is sufficiently released, the RMLA1 and the sensor IC7 are adversely affected by the heat, and as a result, the abnormal image is generated. Is prevented. Further, in order for the image processing circuit 43 to perform processing for monitoring the temperature of the contact image sensor 40,
It is not necessary to provide a dedicated temperature detecting means in the system control unit 44.

FIG. 11 is a block diagram showing a control system according to the seventh embodiment of the present invention. 50 is a heater attached to the light source 6 to improve the temperature characteristics of the light source 6, 51 is a heater for warming the light source 6. Thermistor for detecting the temperature of 50, 52 for the light source 6
Lighting device, 53 is an image processing circuit that processes the output from the sensor IC 7, 54 is a thermistor detection circuit that detects and processes the output of the thermistor 51, and 55 includes the image processing circuit 53, the thermistor detection circuit 54, and the like. Image sensor 22, heater
The system control part which controls 50, the lighting device 52, etc. is shown.

When a hot cathode tube such as a fluorescent lamp is used as the light source, since the hot cathode tube has poor temperature characteristics,
Usually, a heater is attached to the tube surface to warm the tube surface while observing the output of the thermistor so that the tube surface has a predetermined temperature during image reading. In the seventh embodiment, the output of the thermistor 51, which detects the temperature of the heater 50, is used as data for determining whether or not an abnormal image is generated due to heat generation from the light source.

The system controller 55 monitors the temperature of the contact image sensor 22 based on the output of the thermistor 51, and prevents abnormal output of the sensor IC 7 due to heat of the light source 6 in the same manner as in the fifth embodiment. Control. Since the control operation is the same as that of the fifth embodiment, the description is omitted.

According to the sixth embodiment thus constructed, the heat generated from the light source is generated based on the output of the thermistor 51 which detects the temperature of the heater 50 attached to the light source 6 in order to improve the temperature characteristic of the light source 6. The sensor IC 7 determines whether or not the abnormal output is generated, and before the abnormal output is generated, the image reading is temporarily stopped, and the control is performed to restart the reading after sufficient heat radiation is performed. RMLA1
The heat and the sensor IC 7 are prevented from being adversely affected by heat, and as a result, an abnormal image is prevented from occurring. Further, since the output of the thermistor 51 serves as both the data for detecting the temperature of the light source 6 and the data for determining the occurrence of the abnormal image, it is not necessary to provide a dedicated thermistor for detecting the temperature around the sensor IC 7.

In the embodiments of the present invention described above, the RMLA is adopted as the unity-magnification imaging element, but the SLA may be adopted as the unity-magnification imaging element.

FIG. 12 is an internal configuration diagram showing the configuration when the SLA is adopted in the first embodiment, 60 is a frame for accommodating the SLA 12, the light source 6, the sensor IC 15, etc., 61 is various parts in the frame 60. 2 shows a contact image sensor configured to house a.

As shown in FIG. 12, by opening the periphery of the light source 6, the heat generated from the light source is radiated to the outside, so that the heat of the light source causes the frame 60 or the frame 60.
It is possible to prevent the SLA 12 therein from being deformed.

[0069]

According to the present invention constructed as described above, the following effects can be obtained.

According to the first and second aspects, the heat generated from the light source is radiated to the outside, so that the heat of the light source deforms the frame or the optical system in the frame, and the sensor outputs abnormal output. It is possible to prevent the occurrence of an abnormal image due to the occurrence.

According to the third aspect of the invention, since the heat insulating material blocks the heat from the light source radiated to the frame, the heat of the light source may deform the frame or the optical system in the frame, or the sensor may output abnormally. It is possible to more reliably prevent the occurrence of an abnormal image due to the occurrence of the.

According to the structure of claim 4, it is possible to prevent a low output and a failure caused by external dust.

According to the fifth aspect of the present invention, the control is performed so that the reading is temporarily stopped before the abnormal image is generated due to the heat generation of the light source during the image reading, and the reading is restarted after the heat is sufficiently dissipated. Therefore, it is possible to prevent the generation of an abnormal image due to the deformation of the frame or the optical system in the frame due to the heat of the light source or the output abnormality of the sensor.

According to the sixth aspect of the present invention, since it is possible to directly monitor the temperature change of the contact image sensor, the reading is temporarily stopped before the output abnormality of the sensor occurs due to the heat generation of the light source, and the heat is sufficiently radiated. The control of restarting the reading after the reading can be performed with higher accuracy.

According to the configuration of claim 7, in addition to the effect of the configuration of claim 5, it is possible to monitor the temperature change by the image processing means, so that it is not necessary to provide a dedicated temperature detection means. The cost can be reduced.

According to the eighth aspect of the invention, since the RMLA is used as the unity magnification image forming element, the contact image sensor can be downsized.

According to the structure of the ninth aspect, the number of constituent members is smaller than that of the case of the eighth aspect, so that the assemblability is improved.

According to the structure of the tenth aspect, the temperature detecting means used for detecting the temperature of the light source is temporarily stopped before the output abnormality of the sensor, and is read after the heat is sufficiently dissipated. By diversion for the control of restarting, the cost can be reduced.

According to the eleventh aspect, since the temperature in the vicinity of the sensor is detected, the reading is temporarily stopped before the sensor causes the output abnormality due to the heat generation of the light source, and the reading is restarted after the heat is sufficiently dissipated. It is possible to perform the control to perform with higher accuracy.

According to the twelfth aspect of the invention, since the heat dissipation is promoted by the movement of the traveling body, the reading stop time can be shortened and the waiting time of the user can be shortened.

According to the structure described in claim 13, it is a normal operation that the operation of temporarily stopping the reading before the sensor causes the output abnormality and restarting the reading after the heat is sufficiently dissipated. Therefore, the user's anxiety can be eliminated.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of the contact image sensor of FIG.

FIG. 3 is a configuration diagram showing a main part of a second embodiment of the present invention.

FIG. 4 is a configuration diagram showing a main part of a third embodiment of the present invention.

FIG. 5 is a block diagram showing a control system according to a fourth embodiment of the present invention.

FIG. 6 is a timing chart showing an operation according to the fourth exemplary embodiment of the present invention.

FIG. 7 is a block diagram showing a control system according to a fifth embodiment of the present invention.

FIG. 8 is a graph showing a control operation in the fifth embodiment.

FIG. 9 is a block diagram showing a control system according to a sixth embodiment of the present invention.

FIG. 10 is a timing chart showing an operation according to the sixth embodiment of the present invention.

FIG. 11 is a block diagram showing a control system according to a seventh embodiment of the present invention.

FIG. 12 is a configuration diagram showing another configuration of the first embodiment of the present invention.

FIG. 13 is an explanatory diagram showing an image forming principle of a roof mirror lens array (RMLA).

FIG. 14 is a configuration diagram showing a configuration in which RMLA is mounted on a contact image sensor according to a conventional image reading apparatus.

FIG. 15 is a configuration diagram showing a configuration in which a SELFOC lens array (SLA) is mounted on a contact image sensor according to a conventional image reading apparatus.

FIG. 16 is a graph showing the temperature characteristic of the output of the sensor IC.

[Explanation of symbols]

1 ... Roof mirror lens array (RMLA), 2 ... Lens array (LA), 3 ... Roof mirror array (RMA),
4 ... Optical path separation mirror (SM), 5, 17, 22, 30, 40 ...
Contact image sensor, 6,13 ... Light source, 7,14 ... Sensor IC, 8,15 ... Sensor substrate, 9, 16, 20, 60 ... Frame, 10 ... Aperture plate, 11, 18 ... Contact glass,
12, 61 ... Selfoc lens array (SLA), 20a
… Aperture, 21… Side plate, 23… Insulating material, 24… Cover glass, 25… Reading motor, 26… Operation part, 27,34,44,
55 ... System control part, 31, 41, 51 ... Thermistor, 3
3, 54 ... Thermistor detection circuit, 42 ... Analog multiplexer, 32, 43, 53 ... Image processing circuit, 50 ... Heater,
52 ... Lighting device.

Claims (13)

[Claims] 1. An array equal-magnification imaging element having a lens array in which a plurality of lenses are continuously formed, a light source for irradiating an original with light, and an original document in which the array equal-magnification imaging element forms an equal-magnification image. An image reading apparatus equipped with a contact image sensor comprising a sensor for receiving reflected light from an image sensor and a frame in which the array equal-magnification imaging element, a light source, a sensor, etc. are installed inside. An image reading apparatus comprising: an opening through which reflected light from a document entering an image forming element passes, and an opening through which heat of the light source is released to the outside. 2. An array unity magnification image forming element having a lens array in which a plurality of lenses are continuously formed, a light source for irradiating a document with light, and an original unit image formed by the array unity magnification image forming element. In an image reading apparatus including a contact image sensor including a sensor that receives reflected light from a light source, and a frame in which the array equal-magnification imaging element, the light source, and the sensor are installed inside, the tube surface of the light source is exposed to the outside. An image reading apparatus, wherein grip portions for gripping both ends of the light source in an exposed state are provided at both end portions in a longitudinal direction of the frame. 3. The image reading device according to claim 1, wherein a heat insulating means is provided on a wall surface of the frame facing the light source. 4. A transparent cover is provided at the opening of the frame through which the reflected light from the document passes.
Or the image reading device described in 2. 5. An array unity magnification image forming element having a lens array in which a plurality of lenses are continuously formed, a light source for irradiating a document with light, and an original unit image formed by the array unity magnification image forming element. In an image reading device equipped with a contact image sensor including a sensor for receiving reflected light from an image sensor and a frame in which the array equal-magnification imaging element, a light source, a sensor, etc. are installed, an image reading time by the contact image sensor Control means for providing an image reading operation after the light source is turned off to interrupt the image reading when the time measuring means measures a predetermined time. An image reading device characterized by being provided. 6. An array unity-magnification imaging element having a lens array in which a plurality of lenses are continuously formed, a light source for irradiating a document with light, and an original document in which the array unity-magnification imaging element images at the same size. An image reading apparatus equipped with a contact image sensor including a sensor for receiving reflected light from a sensor and a frame in which the array equal-magnification imaging element, a light source, a sensor, etc. are installed, and detects the temperature of the contact image sensor. Temperature detecting means and circuit means for monitoring the output of the temperature detecting means, and when the circuit means detects that the contact image sensor has risen to a predetermined temperature, the light source is turned off to read an image. When the circuit means detects that the contact image sensor has dropped to a predetermined temperature after the image reading is interrupted, the image reading is performed. Image reading apparatus characterized by generating a signal to initiate. 7. An array unity-magnification imaging element having a lens array in which a plurality of lenses are continuously formed, a light source for irradiating a document with light, and an original document in which the array unity-magnification imaging element forms an image of the same size. An image reading apparatus equipped with a contact image sensor including a sensor for receiving reflected light from a sensor and a frame in which the array equal-magnification imaging element, a light source, a sensor, etc. are installed, and detects the temperature of the contact image sensor. Temperature detecting means and image processing means for processing the output of the temperature detecting means and the contact image sensor, and when the image processing means detects that the contact image sensor has risen to a predetermined temperature, A signal that interrupts image reading is generated by turning off the light source, and after the image reading is interrupted, it is detected that the contact image sensor has decreased to a predetermined temperature. When unit detects an image reading apparatus characterized by generating a signal to start image reading. 8. An array-magnification imaging element includes a lens array in which a plurality of lenses are continuously formed, and a roof mirror array in which a plurality of roof-type reflecting surfaces are continuously formed at an arrangement pitch of the lens arrays. In addition, an optical path separation mirror that separates the reflected light from the original that is incident on the lens array, reflected by the roof mirror array, and passed through the lens array again into the sensor is attached to the contact image sensor. The image reading device according to claim 1, 2, 5, 6, or 7, which is installed. 9. An equal-magnification image-forming element for an array has a lens array in which a plurality of lenses are continuously formed, and the lens-array forms an image of reflected light from an original on a sensor. The image reading apparatus according to claim 1, 2, 5, 6, or 7, wherein 10. The image reading apparatus according to claim 5, wherein the temperature detecting means can detect a heat control signal of the light source. 11. The image reading apparatus according to claim 6, wherein the temperature detecting means is provided on the sensor substrate. 12. The image reading apparatus according to claim 5, wherein the running body equipped with the contact image sensor is movable when the image reading is interrupted. 13. The image reading apparatus according to claim 5, further comprising an informing unit for informing that the operation is a normal image reading operation.