CN101388939A - Contact type image sensor - Google Patents
Contact type image sensor Download PDFInfo
- Publication number
- CN101388939A CN101388939A CNA2007101128873A CN200710112887A CN101388939A CN 101388939 A CN101388939 A CN 101388939A CN A2007101128873 A CNA2007101128873 A CN A2007101128873A CN 200710112887 A CN200710112887 A CN 200710112887A CN 101388939 A CN101388939 A CN 101388939A
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- light
- type image
- image sensor
- original copy
- lens
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- 230000011514 reflex Effects 0.000 claims description 27
- 239000011247 coating layer Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 2
- 230000001235 sensitizing effect Effects 0.000 abstract 2
- 230000003760 hair shine Effects 0.000 description 5
- 201000009310 astigmatism Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Abstract
The invention discloses a high illuminance contact type image sensor, which comprises a sensor base plate, sensitizing components arranged on the sensor base plate in line; lenses disposed on the sensitizing components on the sensor base plate, light sources disposed on one side of the lenses, a frame capable of containing the sensor base plate, the lenses and the light sources and a light-passing board for carrying original copy disposed on the upper part of the frame. The invention is characterized in that: the lenses has a light-reflectance apparatus disposed on the side facing the light resource. The reflecting surface of the light-reflectance apparatus is on the perpendicular direction symmetrical with the emitting direction of the light from the light source about the lenses central axis. In the invention, the light reflected by the light-reflectance apparatus and the light emitted by the light source shoot onto the original copy from the two symmetrical directions at the same time, the light intensity on the original copy is improved, and no shadow occurs even the original copy is not flat or has folds, consequently, the image reading quality is improved.
Description
Technical field:
The present invention relates to a kind of image read-out, is a kind of contact-type image sensor specifically.
Background technology:
Fig. 5 is the sectional drawing of existing contact-type image sensor, 1 is illuminating source among the figure, the 2nd, lens, the 3rd, the photographic department (photosensitive integrated circuit) of receiver lens 2 light that converges, the 4th, the sensor base plate of the photosensitive integrated circuit 3 that lift-launch is arranged in a straight line, the 6th, hold the framework of light source 1, lens 2, sensor base plate 4,5 are arranged on the light-passing board of the lift-launch original copy on the framework 6, and 10 is original copy.
In above-mentioned contact-type image sensor, the light that light source 1 sends, see through light-passing board 5, shine on the original copy 10 of outside, the literal black region light on the original copy 10 is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation pass glass plate 5 again, are collected by lens 2, shine the photosensitive area of the photographic department 3 on the sensor base plate 4.Photographic department 3 be by many photosensitive areas and can will shine the light of each photosensitive area carry out opto-electronic conversion, and the drive circuit of signal output is formed.The light that receives converts telecommunications to after overdrive circuit output is outwards exported as image (literal) information.Original copy constantly moves, and the image information of being put down in writing on it (literal) will be read continuously.
There is following problem in the above-mentioned contact-type image sensor: the one, the light that light source sends is in shining the process of original copy, will be through two secondary reflections of light-passing board inner surface and outer surface, these reverberation all have been depleted, the actual effective light that shines on the original copy is reduced, greatly reduce the utilance of light, influenced the reading quality of image.The 2nd, the light that falls through twice reflection loss of light-passing board can form random astigmatism, and these random astigmatism can enter lens directly or indirectly and form interference signal, influences the reading quality of image.The 3rd, the light that light source sends can only be from direction irradiation original copy, and is uneven or when fold was arranged, the image that reads shade can occur and cause distortion, has reduced the reading quality of image when original copy.
Summary of the invention:
Technical problem to be solved by this invention is: overcome existing contact-type image sensor optical loss many, interference signal is arranged, and the problem of shade can appear when reading injustice or the original copy of fold being arranged, a kind of contact-type image sensor of high reading quality is proposed.
The present invention can reach by following measure:
A kind of contact-type image sensor, comprise sensor base plate, carry the photosensitive integrated circuit that is arranged in a straight line on the sensor base plate, it is photographic department, be provided with lens above the photographic department on the sensor base plate, a side of lens is provided with light source, and the framework that can hold the sensor substrate, lens, light source, the top of framework is provided with the light-passing board that carries original copy, it is characterized in that being provided with reflex reflector in a side relative with light source of lens.The reflective surface of reflex reflector is an axle at the center with lens, on the symmetrical vertical direction of the light ejaculation direction of light source.
Above-mentioned reflex reflector can be a reflector, also can be reflecting strips, also can be the reflecting coating layer of white.
Above-mentioned reflex reflector can be arranged on the inner surface of light-passing board, also can be arranged on the framework, can also be arranged on the side surface of lens.
The present invention is owing to the side relative with light source at lens is provided with reflex reflector, and the reflective surface of reflex reflector penetrates on the symmetrical vertical direction of direction at the light that with lens is center and light source.So light from the light source ejaculation, pass in the process of light-passing board directive original copy, be reflected again after the reverberation that inner surface and outer surface produced of light-passing board shines on the reflective surface of reflex reflector and return to shine on the position that original copy reads, prevented the catoptrical loss of original light-passing board surfaces externally and internally, improve the light intensity that shines on the original copy, reduced the interference signal that random astigmatism caused simultaneously.
The present invention is because reflex reflector is arranged on a side relative with light source of lens, the light that light that reflects and light source penetrate is from monosymmetric direction directive original copy, therefore even original copy is uneven or when fold is arranged, the image that reads can not occur shade yet and cause distortion, has improved the reading quality of image.
Description of drawings:
Fig. 1 is arranged at the sectional schematic diagram of the contact-type image sensor of light-passing board inner surface for a kind of reflex reflector of the present invention.
Fig. 2 is arranged at the sectional schematic diagram of the contact-type image sensor of lens side surface for a kind of reflex reflector of the present invention.
Fig. 3 is arranged at the sectional schematic diagram of the contact-type image sensor on the framework for a kind of reflex reflector of the present invention.
Fig. 4 is arranged at the sectional schematic diagram of the contact-type image sensor on the framework for another kind of reflex reflector of the present invention.
Fig. 5 is the sectional drawing of existing contact-type image sensor.
Mark among the figure: 1 light source, 2 lens, 3 photographic departments, 4 sensor base plates, 5 light-passing boards, 6 frameworks, 7 reflex reflectors, 10 original copys
Embodiment:
Below in conjunction with accompanying drawing the present invention is further described:
Shown in Figure 1 as accompanying drawing, the 1st, illuminating source, the 2nd, lens, the 3rd, the photographic department of receiver lens 2 light that converges, promptly photosensitive integrated circuit, the 4th, the sensor base plate of the photosensitive integrated circuit 3 that lift-launch is arranged in a straight line, the 6th, hold the framework of light source 1, lens 2, sensor base plate 4,5 are arranged on the light-passing board of the lift-launch original copy on framework 6 tops, and the structure of above-mentioned each part and the interconnected relationship between them are same as the prior art, and this does not give unnecessary details.7 is the reflex reflector that the side relative with light source at lens is provided with among the present invention.The reflective surface of reflex reflector is an axial plane at the median plane with lens, on the symmetrical vertical direction of the light ejaculation direction of light source.Reflex reflector can be a reflector, also can be reflecting strips, can also be the reflecting coating that is provided with on reflective surface, and reflecting coating can be white ink, reflecting coating layer, adhesive tape etc.The installation method of reflex reflector: can be installed on the inner surface of light-passing board 5 (Fig. 1), also can be installed on the side surface of lens (Fig. 2), also can be installed on the framework (Fig. 3, Fig. 4).
The light that light source 1 of the present invention sends, in seeing through the process of light-passing board 5 directive original copys, shine on the reflective surface of reflex reflector through the reverberation that inner surface and outer surface produced of light-passing board after, be reflected again and return to shine on the position that original copy reads, prevented the catoptrical loss of original light-passing board surfaces externally and internally, improve the light intensity that shines on the original copy, improved the reading quality of image, reduced the interference signal that random astigmatism caused simultaneously.In addition, because reflex reflector is arranged on the side relative with light source of lens, the light that the light that reflects and light source penetrate is from monosymmetric direction directive original copy, even therefore original copy injustice or when fold is arranged, the image that reads can not occur shade yet and cause distortion, has improved the reading quality of image.
Light of the present invention shines on the original copy from the direction of two symmetries, literal black region light on the original copy is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation pass glass plate 5 again, collected by lens 2, shine the photosensitive area of the photographic department 3 on the sensor base plate 4.Photographic department 3 be by many photosensitive areas and can will shine the light of each photosensitive area carry out opto-electronic conversion, and the drive circuit of signal output is formed.The light that receives converts telecommunications to after overdrive circuit output is outwards exported as image (literal) information.Original copy constantly moves, and the image information of being put down in writing on it (literal) will be read continuously.
Claims (8)
1, a kind of contact-type image sensor, comprise sensor base plate, carry the photographic department that is arranged in a straight line on the sensor base plate, be provided with lens above the photographic department on the sensor base plate, one side of lens is provided with light source, and the framework that can hold the sensor substrate, lens, light source, the top of framework is provided with the light-passing board that carries original copy, and a relative side with light source that it is characterized by at lens is provided with reflex reflector.
2, a kind of contact-type image sensor according to claim 1 is characterized in that the reflective surface of reflex reflector is an axle at the center with lens, on the symmetrical vertical direction of the light ejaculation direction of light source.
3, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is a reflector.
4, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is a reflecting strips.
5, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is the reflecting coating layer of white.
6, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is arranged on the light-passing board inner surface.
7, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is arranged on the framework
8, a kind of contact-type image sensor according to claim 1 is characterized in that reflex reflector is arranged on the side surface of lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101128873A CN101388939A (en) | 2007-09-13 | 2007-09-13 | Contact type image sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101128873A CN101388939A (en) | 2007-09-13 | 2007-09-13 | Contact type image sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101388939A true CN101388939A (en) | 2009-03-18 |
Family
ID=40478101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101128873A Pending CN101388939A (en) | 2007-09-13 | 2007-09-13 | Contact type image sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101388939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158623A (en) * | 2010-02-05 | 2011-08-17 | 精工爱普生株式会社 | Image reading apparatus |
| EP2782325A3 (en) * | 2013-03-21 | 2015-10-07 | Kabushiki Kaisha Toshiba | Image reading apparatus and sheet processing apparatus |
-
2007
- 2007-09-13 CN CNA2007101128873A patent/CN101388939A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158623A (en) * | 2010-02-05 | 2011-08-17 | 精工爱普生株式会社 | Image reading apparatus |
| EP2782325A3 (en) * | 2013-03-21 | 2015-10-07 | Kabushiki Kaisha Toshiba | Image reading apparatus and sheet processing apparatus |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090318 |