JPH05136958A - Reflection/transmission original reader - Google Patents

Abstract

PURPOSE:To enable the reading of reflection and transmission originals at optimum accuracy and high quality. CONSTITUTION:A reflection original reading part 22 providing a reflection original placing means 25 placing a reflection original 24 and a transmission original reading part 23 providing a transmission original placing means 27 placing the translucent original, a translucent original moving means 28 moving the placed translucent original, and transmission original illuminating means 29 are provided. A reflection/transmission original reading optical system 30 providing a reflection original illuminating means 33, a first travelling object mirror 34, a second travelling object mirror 35, an image forming element 36, and a photoelectric conversion element 37 is disposed so as to be moved freely between the reflection original image forming position of the reflection original reading part 22 and the transmission original image forming position of the transmission original reading part 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a scanner, DC, DC
The present invention relates to a reflection / transmission original reading device used for C and the like.

[0002]

2. Description of the Related Art Conventionally, as a reflection / transmission original reading device capable of reading a reflection original and a transmission original, for example, Japanese Patent Application Laid-Open No. Hei 2 (1999) -28200
There is one disclosed in Japanese Patent Publication No. 174462. This will now be described with reference to FIG. First, when reading a reflection original, a reflection original (not shown) is placed on the original table 2 on the upper side of the main body 1 with the image surface facing downward, and the illumination lamp 3 is turned on in this state to be integrated with the illumination lamp 3. The original image is read by moving the reading unit 4 along the original table 2, the light of the read image is formed by the image forming element 5, and photoelectric conversion is performed via the infrared cut filter 6. The read image information is output by being guided to the solid-state image sensor array 7 as an element. On the other hand, when reading a transparent original, the film image F projected by the film projector 8 is reflected by the film projector 8 installed at a position other than the reading position of the reflective original on the main body 1. The light path is directed downward by 9 and an image is formed on the original table 2 through the Fresnel lens 10 and the diffusion plate 11, and is read by the image reading unit 4. In this case, the reading unit 4 is fixed and the film image F is moved.

FIG. 15 shows an example of an optical system movable type, and FIG. 16 shows an example of an original moving type reflection / transmission original reading apparatus. In FIG. 15, a transparent original illumination light source 13 is provided above the main body 12, and a reflective original illumination light source 15 and a reflector 16 are disposed below the contact glass 14 below the main body 12. A first traveling body mirror 17, a second traveling body mirror 18, and a third traveling body mirror 18 are provided below the reflection original illumination light source 15.
The traveling body mirror 19 is sequentially arranged, and the imaging element 20 and the photoelectric conversion element 21 are sequentially arranged at the subsequent stage. In this case, the reading of the transparent original (not shown) is performed by detecting the photoelectric conversion element 21 using the transparent original illumination light source 13, while the reading of the reflective original (not shown) uses the reflective original illumination light source 15. Read. Also in FIG. 16, an image is read in substantially the same manner as in FIG. 15 except that the transparent and reflective originals are moved.

[0004]

In the apparatus shown in FIG. 14, a transparent original read by a scanner is generally 35 m long.
The main film is a 4 × 5 inch film. If these are read at the same density as the reflection original and enlarged to the same size, the read pixels become coarse and sufficient quality cannot be obtained. Moreover, in this case, since the image once formed on the diffusion plate 11 is read through the Fresnel lens 10, the image quality is deteriorated, and high-quality reading is difficult. In general, an image recorded on a transmissive film used as a transmissive original is of high quality, and it is an essential condition that an image read from the transmissive film must also be of high quality. Therefore, in the past, the transparent original is magnified and read by the magnifying optical system.

As an example thereof, an A4 size original is used as a reflection original, and its short side (210 mm) is 500.
When reading with a 0 pixel sensor, the original surface is 0.042 mm
While it is sufficient to sample at intervals, the same width in the short direction (24 mm) of a 35 mm film is used as a transparent original.
0.0048 mm when reading with a 000 pixel sensor
Interval sampling is required. Therefore, when a transparent original is read with the same number of pixels per line as the reflective original or at a number close thereto, the image forming magnification is changed in the main scanning direction, the feeding speed of the scanner is slowed in the sub scanning direction, and It is necessary to improve the feeding accuracy of the scanner, and the apparatus itself is required to have high accuracy. In addition, the optical moving type of FIG.
It is technically difficult to drive with high precision in a wide speed range so as to deal with both reflection and transmission in any of the original moving type, and it is very difficult to realize this. It becomes expensive.

Further, when a transparent original is read by the movable optical system shown in FIG.
Since the third traveling body mirrors 17, 18, and 19 are synchronously driven and read, a sensor for such synchronization is required, which is expensive. Moreover, the main body 1
Since the light source and the drive motor are mounted on the second pressure plate portion, the pressure plate portion becomes heavy and it is difficult to open and close the main body door normally. In addition, FIG.
In case of the original moving type, if the illumination light source is attached,
Since it is not possible to perform work by mixing a reflective original and a transparent original, it is inconvenient in terms of work efficiency.

In addition to this, when a transparent original is read, the white reference uses the light flux that has passed through the contact glass on which the transparent original is not placed, so if there is a scratch on the contact glass, the read image will be black. Noise such as streaks will occur. In addition, even in the reading part, since the transparent original is read at high density, there may be a problem even if the contact glass is scratched, which is not a problem in reading the reflective original. It must be replaced as a whole, which is a waste.

[0008]

According to a first aspect of the present invention, there is provided a reflective original document reading unit having a reflective original document mounting unit for mounting a reflective original document, and a transparent original document mounting unit for mounting a transparent original document and the transparent original document mounting unit. A transparent original reading unit including a transparent original moving means for moving the transparent original and a transparent original illuminating means for illuminating the transparent original is provided, and the reflective original illuminating means, the first traveling mirror and the second traveling mirror are connected. A reflection / transmission original reading optical system including an image element and a photoelectric conversion element is movably arranged between a reflection original image forming position of the reflection original reading unit and a transmission original image forming position of the transmission original reading unit. did.

According to a second aspect of the present invention, in the first aspect of the invention, the second traveling body mirror of the reflection / transmission original reading optical system is provided on the transmission original reading side with respect to the reflection original reading position of the reflection original reading section. Placed close to.

According to a third aspect of the present invention, there is provided a reflective original document mounting means for mounting a reflective original document, and a reflective original document illuminating means for illuminating the reflective original document, a reflective original document mirror element, and a reflective original image forming element are provided. A reading optical system is provided, transparent document mounting means for mounting a transparent document is provided, transparent document moving means for moving the mounted transparent document is provided, transparent document illumination means for illuminating the transparent document, and transparent document mirror element. A transparent original reading optical system including a transparent original image forming element is provided, and images are formed by the reflective original image forming element of the reflective original reading optical system and the transparent original image forming element of the transparent original reading optical system. One photoelectric conversion element for detecting the emitted light is provided.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the photoelectric conversion element is provided with a reflection original image forming position and a transmission original image forming so that the reading of the reflection original and the reading of the transmission original can be performed. It is arranged so that it can move freely between the positions.

According to a fifth aspect of the present invention, in the third aspect of the present invention, the common mirror is provided in the reflective original reading optical system and the transparent original reading optical system so that the reflective original image forming position coincides with the transparent original image forming position. It was arranged so as to be movable with respect to the system.

According to the invention of claim 6, claims 3, 4,
In the invention described in 5, the reflective original illuminating means is provided in the transparent original reading optical system.

[0014]

According to the first aspect of the present invention, since the reading of the reflective original and the reading of the transparent original are performed by the same reflection / transparent original reading optical system, the reading in accordance with different accuracy requirements of the transparent original and the reflective original. A driving method can be adopted, which eliminates the need for an excessive design burden and design cost on the reading-driving scanning system.

According to the second aspect of the present invention, since the second traveling body mirror is provided on the transparent original reading portion side with respect to the reflection original reading position, the first and second traveling body mirrors are provided when the transparent original is read. When the distance between the original surface and the image forming lens is set to the shortest to minimize the distance between the image forming element and the photoelectric conversion element, a sufficient space can be secured on the reflection original reading section side.
This makes it possible to easily take the optimum optical arrangement for enlarging and reading the transparent original.

According to the third aspect of the invention, since the reading of the reflective original and the transparent original is performed by using the same photoelectric conversion element, a reading driving method suitable for different required accuracy of the transparent original and the reflective original is adopted. Moreover, since different optical systems are used, the degree of freedom in design is improved, and it is possible to provide a highly accurate lens without imposing an excessive design burden.

According to the fourth aspect of the present invention, since the reading operation of the reflective original and the transparent original is switched by moving the photoelectric conversion element, a common photoelectric conversion means can be used, and the number of parts can be reduced. Can be reduced.

According to the fifth aspect of the present invention, by switching the reading of the reflective original and the transparent original by moving the common mirror, it is possible to use a common photoelectric conversion means and reduce the number of parts. it can.

According to the sixth aspect of the present invention, since the reflective original illuminating means is provided in the transparent original reading optical system, it is possible to read even a reflective original that requires high-density reading. ..

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the invention described in claims 1 and 2 is shown in FIGS.
Description will be given based on FIG. 7. 1 (a) and 1 (b) show the entire structure of a reflection / transmission original reading apparatus. This device
It is roughly divided into a reflective original reading section 22 and a transparent original reading section 23. First, in the reflective original reading section 22, a reflective original mounting means 25 (contact glass) for mounting the reflective original 24 is provided on the upper part of the main body. In the transparent original reading unit 23, a transparent original 26 (see FIGS.
A transparent original document mounting means 27 for mounting (see) is provided. The transparent original mounting means 27 is a transparent original moving means 2
It can be moved by 8. The transparent original 2
A transparent document illumination light source 29 as a transparent document illumination means for illuminating the transparent document 6 is provided on the upper portion of 6.

A reflective / transparent original reading optical system 30 is provided in the space area below the main body of the apparatus, which is separated into the reflective original reading section 22 and the transparent original reading section 23 in this manner. The reflection / transmission original reading optical system 30 is provided with a reflection original illuminating means 33 composed of a reflection original illuminating light source 31 and a counter reflecting plate 32. Below the reflection original illuminating means 33, a first traveling body mirror is provided. 34, a second traveling mirror 35, an imaging lens 36 as an imaging element, and a photoelectric conversion element 37 are sequentially arranged. Such a reflection / transmission original reading optical system 30 can freely move between a reflection original image forming position of the reflection original reading unit 22 and a transmission original image forming position of the transmission original reading unit 23. ..

Further, here, the second traveling body mirror 35 of the reflection / transmission original reading optical system 30 is arranged close to the reflection original reading position of the reflection original reading portion 22 on the transparent original reading portion 23 side. There is.

A method of reading the reflective original 24 and the transparent original 26 in such a configuration will be described. First,
A method of reading the reflection original 24 will be described with reference to FIG. First, the reflection / transmission original reading optical system 30 is moved to the reflection original image forming position in the reflection original reading unit 22 (reflection original mounting means 25
Lower position). In this state, when reading the reflective original document 24 mounted on the reflective original document mounting means 25, the reflective original document illumination light source 31 is turned on, and the reflective original document illumination means 33, the first traveling mirror 34, and the second traveling direction. The body mirror 35 moves relatively along the document surface, and the imaging lens 3
The image can be read by reading the image formed by 6 and detecting it by the photoelectric conversion element 37. Note that such a reading method is the same as a general fixed-type original (see FIG. 15) original reading method.

A method of reading the transparent original 26 will be described with reference to FIG.
A description will be given based on (b). Reflective transmission original reading optical system 30
Is moved to the transparent original image forming position in the transparent original reading unit 23 (the position below the transparent original mounting means 27), and the first traveling body mirror 34, the second traveling body mirror 35, and the imaging lens 36 are rearranged. In this state, when the transparent original 26 mounted on the transparent original mounting means 27 is read, the transparent original illumination light source 29 is turned on, the reflective transparent original reading optical system 30 is fixed, and the transparent original moving means. 28 for transparent manuscript 2
6 is moved, and the photoelectric conversion element 37 is moved by the imaging lens 36.
Reading can be performed by detecting at. In this case, the transparent original illumination light source 29 and the transparent original mounting means 27
Uniform illumination can be performed by providing the diffuser plate 38 between and. Further, as a driving method of the transparent original moving means 28 for moving the transparent original 26, a ball screw,
It can be performed with high accuracy by using a driving method such as a linear direct motor (LDM).

Next, the reason why the optical arrangement of the second traveling member mirror 35 in the reflection / transmission original reading optical system 30 is set closer to the transparent original reading unit 23 will be described. In general, the transparent original 26 must be read in an enlarged manner, so the imaging lens 36 must be brought close to the original surface, and the distance between the photoelectric conversion element 37 and the imaging lens 36 must be separated. Therefore, consider a case where the second traveling member mirror 35 is brought to the side opposite to the transparent original reading unit 23 with respect to the reading position of the transparent original 26, as shown in FIG. Now, when the first traveling body mirror 34 and the second traveling body mirror 35 are brought close to each other at the time of reading the transparent original, depending on the lens, it becomes difficult to secure a space for separating the photoelectric conversion element 37 from the imaging lens 36. In order to secure such a space, the device itself has to be upsized.

In order to avoid such an increase in the size of the device, the second traveling mirror 35 is positioned on the transparent original reading portion 23 side so that the transparent original is read as shown in FIG. 1B. When the first traveling body mirror 34 and the second traveling body mirror 35 are brought closest to each other to minimize the distance between the document surface and the imaging lens 36, the space separating the photoelectric conversion element 37 from the imaging lens 36 is reflected. It can be sufficiently secured on the side of the document reading unit 22. For this reason, by arranging the optical arrangement of the second traveling body mirror 35 on the side closer to the transparent original reading unit 23, it is possible to avoid an increase in size of the apparatus.

Next, a method of loading the transparent original 26 by the transparent original mounting means 27 will be described with reference to FIGS. As a method for loading the transparent original 26, a front loading type as shown in FIG.
It is divided into the side loading type as shown in. First, the case of front loading will be described. Generally, it is desirable to read the document at the central portion where the lens has the highest performance. Therefore, as shown in FIG. 6, the transparent manuscript 26 is fixed by being sandwiched by the transparent manuscript mounting means 27 made of transparent glass members, and the transparent manuscript mounting means 27 holding the transparent manuscript 26 therebetween.
Is inserted into the groove 39a formed in the fixed frame 39 to install. In FIG. 7, the transparent original mounting means 27 has the fixed frame 3
9 shows a state in which it is installed. Then, the transparent original 26 thus installed is moved by the original moving means 40.
Is moved to the central reading position by the reading and scanning means 41.
By this, reading is taken while moving in the sub-scanning direction.

Next, in the case of the side loading shown in FIG. 7, the transparent original mounting means 27 in which the transparent original 26 is set is mounted on the fixed frame 42 as in the case of FIG.
Then, the transparent original 26 can be read while moving in the sub-scanning direction by the reading and scanning means 41 as it is.

As described above, the reading of the reflective original 24 and the reading of the transparent original 26 are performed by the same reflective transparent original reading optical system 30, so that the transparent original 26 and the reflective original 24 have different accuracy requirements. It is possible to adopt a different reading drive method. Therefore, it is not necessary to apply an excessive design load or design cost to the reading drive scanning system, and a highly accurate and low cost scanner can be manufactured.

Further, since the reflective original document 24 and the transparent original document 26 are read using separate original document mounting means (reflective original document mounting means 25 and transparent original document mounting means 27), the transparent original document mounting means 27 is scratched when the transparent original document is read. When an adverse effect due to stains or dirt occurs, the transparent original document mounting means 27 may be simply replaced, and such an operation can be easily performed. In this case, the size of the reflection original mounting means 25 is usually A4 or A.
Since it is substantially equal to 3 and is considerably large, it is substantially inconvenient to prepare a spare one, and replacement is not easy. It is easy to put in place, and since the shape is originally replaceable, the above-mentioned replacement work does not pose any problem.

Further, since the second traveling body mirror 35 is provided on the transparent original reading portion 23 side with respect to the reflection original reading position, the first and second traveling body mirrors 34.35 are formed when the transparent original 26 is read. The document surface and the imaging lens 36 should be closest to each other.
When the distance between and is minimized, it is possible to sufficiently secure the space for separating the photoelectric conversion element 37 from the imaging lens 36 on the reflection original reading unit 22 side. Therefore, this makes it possible to easily take the optimum optical arrangement for enlarging and reading the transparent original 26.

Next, an embodiment of the present invention described in claims 3 and 4 will be described with reference to FIGS. 8 and 9. FIG. 8 shows the overall configuration of the apparatus, which is roughly divided into a reflective original reading section 43 and a transparent original reading section 44. In the reflection original reading section 43, reflection original mounting means 46 for mounting the reflection original 45.
(Contact glass) is provided. Below the reflective original mounting means 46, a reflective original illuminating means 49 including a reflective original illuminating light source 47 and a counter reflecting plate 48 is provided. The first traveling body mirror 50 and the second traveling body mirror 50 are provided on the optical path of the light reflected by the reflection original illumination light source 47.
A reflection original mirror element 54 including a traveling body mirror 51 and a fixed mirror 53 is provided (the first traveling body mirror 50 and the second traveling body mirror 51 form a traveling body mirror 52). is doing). A reflective original image forming element 55 is provided between the second traveling body mirror 51 and the fixed mirror 53. The reflection original illuminating means 49, the reflection original mirror element 54, and the reflection original image forming element 55 constitute a reflection original reading optical system 56.

On the other hand, in the transparent original reading section 44, a transparent original mounting means 57 for mounting the transparent original 26 (see FIG. 6).
Is provided. Transparent original moving means 58 for moving the transparent original mounting means 57 is provided. Further, a transparent original illumination light source 59 as a transparent original illuminating means located above the transparent original placing means 57, and a transparent original image forming element 6 located below the transparent original placing means 57.
0 and the transparent manuscript mirror element 63 composed of the fixed mirrors 61 and 62 constitute a transparent manuscript reading optical system 64.

Further, the reflection original image forming element 55 of the reflection original reading optical system 56 and the transmission original reading optical system 64.
There is provided one photoelectric conversion element 65 for detecting the light imaged by each of the transparent original image forming elements 60. In this case, the photoelectric conversion element 65 is the reflection original 45.
Is arranged movably between the reflective original image forming position P and the transparent original image forming position Q so that the reading of the transparent original 26 and the reading of the transparent original 26 can be switched.

Further, below the transparent original mounting means 57, a reflective original illuminating light source 66 as a reflective original illuminating means.
Is provided.

With such a structure, when the reflective original 45 is read, the reflective original 45 mounted on the reflective original mounting means 46 includes the reflective original illuminating means 49, the first traveling mirror 50, and the second traveling. The image of the original is read by moving the body mirror 51 along the surface of the original, the read image is formed by the reflection original image forming element 55, and the image of the reflection original is formed through the fixed mirror 53. It is detected by the photoelectric conversion element 65 located at the position P, whereby the image of the reflection original 45 is read. On the other hand, the transparent document 26
In the case of reading, the photoelectric conversion element 65 is moved from the reflective original image forming position P to the transparent original image forming position Q, and thereafter, is mounted on the transparent original mounting means 57 while being illuminated by the transparent original illuminating light source 59. The transparent original 26 is moved to the transparent original moving means 58.
The transparent original image is formed by the transparent original image forming element 60 and is detected by the photoelectric conversion element 65 via the fixed mirrors 61 and 62, whereby the image of the transparent original 26 can be read. .. In this case, the diffusion plate 6 is provided between the transparent original illumination light source 59 and the transparent original mounting means 57.
By providing 7, uniform illumination can be performed.
Further, a transparent document moving means 58 for moving the transparent document 26.
As a driving method of, a ball screw, a linear direct motor (LDM), or the like can be used with high accuracy.

As described above, as the method of detecting the reading of the reflective original 45 and the transparent original 26, the same photoelectric conversion element 65 is used while moving them, so that the reflective original 45 and the transparent original 26 are detected. It is possible to adopt a reading drive method suitable for each of the different required precisions, and it becomes unnecessary to apply an excessive design load or design cost to the reading drive scanning system. Further, here, since different optical systems are used for reflection and transmission, the degree of freedom in design is improved, and it is easy to develop a highly accurate lens without imposing an excessive design burden. Therefore, from such a thing,
It becomes possible to make a highly accurate reading and a low-priced scanner, and further, it is possible to obtain the same effects as the effects described in the inventions of claims 1 and 2 described above.

Further, since the reading of the reflection original 45 and the transmission of the transparent original 26 are switched by moving the photoelectric conversion element 65, a common photoelectric conversion means can be used and the number of parts can be reduced. As a result, a low-cost document reading device can be obtained.

Further, in this embodiment, the transparent original reading unit 4
Since the reflection manuscript illumination light source 66 is provided in the unit 4, it is possible to read even a reflection manuscript requiring high-density reading (for example, manuscript requiring enlargement reading). It can be expanded further.

FIG. 9 shows a modified example of the configuration of FIG. 8 described above. In this case, the transparent document illumination light source 59 in the transparent document reading unit 44, the transparent document mounting unit 57, and the transparent document moving unit 58 are housed in the lower housing, so that the document surface of the reflective document reading unit 43 is accommodated. It is formed to have the same height as. As a result, the device can be made more compact.

Next, an embodiment of the invention described in claim 5 will be described with reference to FIGS. This embodiment shows a modification of the image forming means in the embodiment of the invention described in claim 3 (see FIG. 8). That is, in the apparatus of FIG. 8, one photoelectric conversion element 65 is connected to the two optical systems 56,
Although movement control was performed between 64, here, the photoelectric conversion element 65 is fixed and the mirror sides are moved relative to each other. Specifically, in FIG. 10, a common mirror 68 as a common mirror that is movable between the reflective original reading optical system 56 and the transparent original reading optical system 64.
Is provided, and a common mirror 68 is provided when reading the reflection original 45.
Is moved to the left transparent original reading optical system 64 and is reflected by one mirror surface, and when reading the transparent original 26, the common mirror 68 is moved to the right reflective original reading optical system 56 and the other mirror surface. Reflected by
The reflective original image forming position P and the transparent original image forming position Q are made to coincide with each other and guided to the fixed photoelectric conversion element 65 so that the image is read. In this way, the switching between the reflective original 45 and the transparent original 26 is performed by moving the common mirror 68, and the common photoelectric conversion means can be used. Therefore, the fixed mirrors 53 and 62 are unnecessary,
As a result, a low-cost document reading device can be realized.

FIG. 11 shows the configuration of FIG. 10 in which, like the case of FIG. 9, the projection portion of the transparent original reading portion 44 is eliminated and the transparent original reading portion 44 is housed inside the housing. With this configuration, the device can be made compact as described above.

FIG. 12 shows a modification of the moving mechanism of the shared mirror 68 shown in FIG. Here, rotating mirrors 68a and 68b as common mirrors that rotate around one point are used.
Is provided. That is, when the reflective original 45 is read, it can be guided to the photoelectric conversion element 65 by rotating the rotary mirror 68b to the position shown by the solid line on the lower side to change the optical path, and when reading the transparent original 26. The rotary mirror 68b is rotated to the position shown by the broken line to rotate the rotary mirror 6 above.
Since the light can be guided to the photoelectric conversion element 65 by being reflected by 8a, it is possible to read the original image.

FIG. 13 shows the configuration of FIG.
As in the case of 11, the projection of the transparent original reading portion 44 is eliminated so that the transparent original reading portion 44 can be housed inside the housing. In this case as well, the size can be further reduced.

[0045]

According to the first aspect of the present invention, there is provided the reflection original reading section having the reflection original mounting means for mounting the reflection original.
A transparent original reading unit is provided which includes a transparent original mounting means for mounting a transparent original, a transparent original moving means for moving the transparent original mounted thereon, and a transparent original illuminating means for illuminating the transparent original. A reflection / transmission original reading optical system including a first traveling mirror, a second traveling mirror, an image forming element, and a photoelectric conversion element, and a reflection original image forming position of the reflection original reading unit and a transmission original reading unit of the reflection original reading unit. Since it is movably arranged between the transparent original image forming position and the transparent original image forming position, by reading the reflective original document and the transparent original document by the same reflective transparent original document reading optical system, different requirements for the transparent original document and the reflective original document can be obtained. It is possible to adopt a reading drive method that matches the accuracy, which eliminates the need for an excessive design burden and design cost on the scanning system for reading drive, resulting in high accuracy and low cost. It is capable of providing a scanner.

According to a second aspect of the present invention, in the first aspect of the present invention, the second traveling body mirror of the reflection / transmission original reading optical system is provided on the side of the transmission original reading portion with respect to the reflection original reading position of the reflection original reading portion. Since the second traveling body mirror is provided on the transparent original reading portion side with respect to the reflection original reading position, the first and second traveling body mirrors are closest to each other when reading the transparent original. When the distance between the document surface and the image forming lens is minimized, it is possible to secure a sufficient space on the reflective document reading side to separate the photoelectric conversion element from the image forming element. The optimum optical arrangement for reading can be easily taken.

According to a third aspect of the present invention, there is provided a reflective original document mounting means for mounting a reflective original document, and the reflective original document is provided with a reflective original document illuminating means for illuminating the reflective original document, a reflective original document mirror element, and a reflective original image forming element. A reading optical system is provided, transparent document mounting means for mounting a transparent document is provided, transparent document moving means for moving the mounted transparent document is provided, transparent document illumination means for illuminating the transparent document, and transparent document mirror element. A transparent original reading optical system including a transparent original image forming element is provided, and images are formed by the reflective original image forming element of the reflective original reading optical system and the transparent original image forming element of the transparent original reading optical system. Since one photoelectric conversion element for detecting light is provided, it is possible to adopt a reading drive method that meets different precision requirements of the transparent original and the reflective original. Thereby improving a degree of freedom for using different optical systems with each other, it is capable of providing a highly accurate lens without imposing excessive design load.

According to a fourth aspect of the present invention, in the invention according to the third aspect, the photoelectric conversion element is provided at the reflection original image forming position and the transmission original image forming so that the reading of the reflection original and the reading of the transmission original can be performed. Since it is arranged so as to be movable between the position and the position, it is possible to reduce the number of parts by using a common photoelectric conversion means, thereby realizing an even lower cost original reading device. is there.

According to a fifth aspect of the present invention, in the third aspect of the invention, the shared mirror is provided in the reflection original reading optical system and the transmission original reading optical system so that the reflection original image forming position coincides with the transmission original image forming position. Since it is arranged so as to be movable with respect to the system, it is possible to use a common photoelectric conversion means, whereby the same effect as the invention of claim 4 can be obtained.

The invention according to claim 6 is the invention as defined in claims 3, 4, and 5.
In the invention described above, since the reflection original illuminating means is provided in the transmission original reading optical system, it is possible to read even a reflection original that requires high-density reading, and the reading application range is further expanded. Is something that can be done.

[Brief description of drawings]

1A and 1B show an embodiment of the invention described in claims 1 and 2, wherein FIG. 1A is a sectional view showing a state in which a reflection / transmission original reading optical system is positioned in a reflection original reading unit; FIG. 6B is a sectional view showing a state in which the reflection / transmission original reading optical system is positioned inside the transparent original reading unit.

FIG. 2 is a cross-sectional view showing a state in which a second traveling body mirror is arranged at a position opposite to that in the case of FIG. 1, for comparison.

FIG. 3 is a perspective view showing an external configuration of a front loading type for transparent originals.

FIG. 4 is a perspective view showing an external configuration of a side loading type for a transparent original.

FIG. 5 is a perspective view showing a state in which a transparent original is fixed to a transparent original mounting means in the front loading type.

FIG. 6 is a perspective view showing a front loading type of a transparent original before being fixed to a transparent original mounting means.

FIG. 7 is a perspective view showing a state in which a transparent original is fixed to a transparent original mounting means in the side loading type.

FIG. 8 is a sectional view showing an embodiment of the invention of claims 3 and 4.

9 is a cross-sectional view showing the shape of the apparatus of FIG. 8 when it has a flat shape without providing a step.

FIG. 10 is a cross-sectional view showing a configuration in the case where a common mirror is provided on the imaging optical path.

11 is a cross-sectional view showing the shape of the apparatus of FIG. 10 when it has a flat shape without providing a step.

FIG. 12 is a cross-sectional view showing a configuration in the case where a turning mirror is provided on the imaging optical path.

13 is a cross-sectional view showing the shape of the apparatus of FIG. 12 in the case where the apparatus has a flat shape without providing a step.

FIG. 14 is a cross-sectional view showing a conventional reflection and transmission original reading device capable of reading a reflection original and a transparent original.

FIG. 15 is a cross-sectional view showing an optical system movable type document reading device for reflection and transmission.

FIG. 16 is a cross-sectional view showing a document moving device of a document moving type for reflection and transmission.

[Explanation of symbols]

 22 Reflective Original Reading Unit 23 Transparent Original Reading Unit 24 Reflective Original 25 Reflective Original Mounting Means 26 Transparent Original 27 Transparent Original Mounting Means 28 Transparent Original Moving Means 29 Transparent Original Illuminating Means 30 Reflective Original Reading Optical System 33 Reflective Original Illuminating Means 34th 1 traveling body mirror 35 second traveling body mirror 36 imaging element 37 photoelectric conversion element 45 reflective original document 46 reflective original document mounting means 49 reflective original document illumination means 54 reflective original document mirror element 55 reflective original document imaging element 56 reflective original document reading optical system 57 transparent Original mounting means 58 Transparent original moving means 59 Transparent original illuminating means 60 Transparent original imaging element 63 Transparent original mirror element 64 Transparent original reading optical system 65 Photoelectric conversion element 66 Reflective original illuminating means 68, 68a, 68b Shared mirror P Reflective original binding Image position Q Transparent original image formation position

Claims (6)

[Claims] 1. A transparent original document reading unit having a reflective original document mounting unit for mounting a reflective original document, a transparent original document mounting unit for mounting a transparent original document, a transparent original document moving unit for moving the transparent original document mounted thereon, and the above-mentioned. A transmissive original document reading section including a transmissive original document illuminating unit for illuminating a transmissive original document is provided, and a reflective transmissive unit including a reflective original document illuminating unit, a first traveling body mirror, a second traveling body mirror, an imaging element, and a photoelectric conversion element A reflection / transmission original reading device, wherein an original reading optical system is movably arranged between a reflection original image forming position of the reflection original reading unit and a transmission original image forming position of the transmission original reading unit. 2. The second traveling body mirror of the reflection / transmission original reading optical system is arranged close to the transmission original reading portion side with respect to the reflection original reading position of the reflection original reading portion. The reflective transmissive original reading device described. 3. A reflection manuscript mounting means for mounting a reflection manuscript is provided, and a reflection manuscript reading optical system including a reflection manuscript illumination means for illuminating the reflection manuscript, a reflection manuscript mirror element, and a reflection manuscript image forming element is provided. Transparent original mounting means for mounting a transparent original is provided, transparent original moving means for moving the mounted transparent original is provided, transparent original illumination means for illuminating the transparent original, transparent original mirror element, and transparent original image forming element. And a transparent original reading optical system including a transparent original reading optical system for detecting light respectively imaged by the reflective original imaging element of the reflective original reading optical system and the transparent original imaging element of the transparent original reading optical system. A reflection / transmission original reading device having a plurality of photoelectric conversion elements. 4. A photoelectric conversion element is movably arranged between a reflective original image forming position and a transparent original image forming position so that the reading of the reflective original and the reading of the transparent original can be switched. The reflection / transmission original reading device according to claim 3. 5. A shared mirror is movably arranged between the reflective original reading optical system and the transparent original reading optical system so that the reflective original imaging position and the transparent original imaging position coincide with each other. The reflection / transmission original reading device according to claim 3. 6. The reflection / transmission original reading device according to claim 3, wherein reflection original illuminating means is provided in the transmission original reading optical system.