CN101783854B - Image reading device - Google Patents
Image reading device Download PDFInfo
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- CN101783854B CN101783854B CN 200910014019 CN200910014019A CN101783854B CN 101783854 B CN101783854 B CN 101783854B CN 200910014019 CN200910014019 CN 200910014019 CN 200910014019 A CN200910014019 A CN 200910014019A CN 101783854 B CN101783854 B CN 101783854B
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Abstract
The invention relates to an image reading device, in particular to a linear array image reading device with quick reading and clear image resolution. The image reading device comprises a frame for supporting; an optical lens is arranged in the frame; a light source is arranged on the lateral surface of the optical lens; a transparent plate can be arranged above the lens; and a circuit substrate is arranged under the lens. The image reading device is characterized in that: the circuit substrate is provided with two rows of photoelectric conversion chips; light emitted by the light source illuminates on a scanned object through the transparent plate; a part of reflected light on the scanned object enters the optical lens through the transparent plate; the reflected light emergent from the other end of the optical lens illuminates on each row of photoelectric conversion chips; and the photoelectric conversion chips simultaneously and respectively convert the received optical signals into electric signals so as to complete the process of scanning image information of the scanned object. The same image reading device realizes variety of reading density, can realize scan resolution optimization aiming at light sources with different wavelengths, and has wide application prospect in financial terminal equipment in the field of paper currency and bill truth identification.
Description
Technical field:
The present invention relates to a kind of image read-out, is the Linear Array Realtime image read-out that a kind of reading speed is fast, image definition is high specifically.
Background technology:
We know, existing linear image reading device as shown in Figure 1, it is provided with passive framework 1, be provided with optical lens 2 in the framework 1, one side of optical lens 2 is provided with light source 3, what have also arranges light source 5 at the opposite side of optical lens 2, the light source 5 general ultraviolet lights that adopt, the top of lens 2 is provided with transparent panel 4, the below of lens 2 is provided with wiring board 6, be positioned on the wiring board 6 lens 2 under be provided with opto-electronic conversion chip 7, opto-electronic conversion chip 7 top surfaces are provided with the sensitization form, inside is provided with circuit, the function of opto-electronic conversion chip 7 is to convert light signal to the signal of telecommunication, during work, the light that light source 3 and light source 5 send, see through transparent panel 4 and shine (original copy) on the scanned object, image on the scanned object (original copy), literal etc. produce reverberation, these reverberation pass transparent panel 4 again, the part reverberation enters optical lens 2, shine on the sensitization form of opto-electronic conversion chip 7 from optical lens 2 other ends reverberation out, opto-electronic conversion chip 7 converts the light signal that receives to the signal of telecommunication, outwards export as image (literal) information, original copy is constantly mobile, the image of putting down in writing on it (literal) information will be read continuously, finishes the image information scanning process of scanned object.
Because existing linear image reading device only is provided with row's opto-electronic conversion chip 7, switch image scanning density two kinds of methods are arranged, a kind of method is that whole pixels all scan, but when sampling only on demand scanning density sample, if the scanning density height that the scanning density of actual needs is more intrinsic than opto-electronic conversion chip, then scanning does not reach specification requirement, so the scanning density that the opto-electronic conversion chip is set is generally higher, the shortcoming one of this method is that production cost is relatively high, the 2nd, even the scanning density of the actual needs scanning density more intrinsic than opto-electronic conversion chip is low, also need both full-pixel scanning, this has just reduced sweep speed; Another kind method is to adopt the scanning density of logic control method control opto-electronic conversion chip, the shortcoming of this method is the restriction that the conversion of scanning density is subjected to the performance of chip own, new making can be changed the cost costliness of the opto-electronic conversion chip 7 of scanning density, and utilizes convertible being limited in scope of opto-electronic conversion chip 7 scanning densities of existing convertible scanning density; These two kinds of methods also have a common shortcoming, namely for the light source of various wavelength, the photosurface of opto-electronic conversion chip 7 is certain to the distance of optical lens 2, and same lens, concerning the different wave length source, the wavelength of light source is shorter, the focal length of lens is shorter, and the wavelength of light source is longer, and the focal length of optical lens is also longer, like this, the line style reading device of prior art, (such as the best focus position blue light of 470nm wavelength), corresponding long wavelength is (such as the light source infrared light of 940nm wavelength) to have satisfied the short wavelength, optimal focus position just not on physical location, has just affected scan resolution; Otherwise satisfied the best focus position of long wavelength's light source, concerning short wavelength light source, optimal focus position just not on physical location, has also just affected the scan resolution of short wavelength light source.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art, providing to provide the linear image of multiple scanning density reading device, and the linear image reading device of the optimum scanning definition that satisfies wider wave-length coverage light source is provided.
The present invention can reach by following measure:
A kind of image read-out, comprise passive framework, be provided with optical lens in the framework, the side of optical lens is provided with light source, can be provided with transparent panel on the lens, the below of lens is provided with circuit base plate, it is characterized in that circuit base plate is provided with two row's opto-electronic conversion chips, the light transmission transparent panel that light source sends shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel and enters optical lens, shine on every row's opto-electronic conversion chip from optical lens other end reverberation out, the opto-electronic conversion chip also converts the light signal that receives to the signal of telecommunication respectively simultaneously, finishes the image information scanning process of scanned object.
The photosensitive pixel density of the row of two among the present invention opto-electronic conversion chip is different, and the sensitization form of opto-electronic conversion chip is positioned on the different horizontal planes, to improve sweep speed and scan resolution.
The sensitization form of two row's opto-electronic conversion chips is positioned on the different horizontal planes among the present invention, and the sensitization form of every row's opto-electronic conversion chip is positioned at the same level face, wherein under row's opto-electronic conversion chip the bench-type structure is arranged.
The area of every row's opto-electronic conversion chip sensitization form is identical among the present invention, and wherein the area of the sensitization form of row's opto-electronic conversion chip is relatively large.
The present invention can have the optical filtering glued membrane at the sensitization form surface-coated of opto-electronic conversion chip, to see through the light of specific wavelength, carries out the image false distinguishing, realizes the true and false of identification note, certificate etc. with exploitation.
The invention has the beneficial effects as follows, use same image read-out, the variation of density is read in realization, and can all realize the scan resolution optimization for light sources with different wavelengths, is with a wide range of applications in the financial terminal equipment in bank note, papers evaluation field.
Description of drawings:
Fig. 1 is a kind of schematic diagram of prior art.
Fig. 2 is the schematic diagram of the embodiment of the invention 1.
Fig. 3 is the schematic diagram of the embodiment of the invention 2.
Fig. 4 is the schematic diagram of the embodiment of the invention 3.
Fig. 5 is the opto-electronic conversion chip schematic top plan view that is arranged side by side of the embodiment of the invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing:
A kind of image read-out, comprise passive framework, be provided with optical lens in the framework, the side of optical lens is provided with light source, light source can be located at a side of lens, also can all be provided with light source in the both sides of lens, wherein there is the light source of a side to adopt ultraviolet light source, to sign puppet, can be provided with transparent panel on the lens, the below of lens is provided with circuit base plate, and said structure and mutual downlink connection relation are same as the prior art, and this does not give unnecessary details, it is characterized in that circuit base plate is provided with two row's opto-electronic conversion chips, the electricity conversion chip comprises the sensitization form, drive circuit, during work, the light transmission transparent panel that light source sends shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel and enters optical lens, shine on every row's opto-electronic conversion chip from optical lens other end reverberation out, the opto-electronic conversion chip also converts the light signal that receives to the signal of telecommunication respectively simultaneously, finishes the image information scanning process of scanned object.
The photosensitive pixel density of the row of two among the present invention opto-electronic conversion chip is different, and the sensitization form of electric conversion chip is positioned on the different horizontal planes, to improve sweep speed and scan resolution.
The sensitization form of two row's opto-electronic conversion chips is positioned on the different horizontal planes among the present invention, and the sensitization form of every row's opto-electronic conversion chip is positioned at the same level face, wherein under row's opto-electronic conversion chip the bench-type structure is arranged.
The area of every row's opto-electronic conversion chip sensitization form is identical among the present invention, and wherein the area of the sensitization form of row's opto-electronic conversion chip is relatively large.
The present invention can have the optical filtering glued membrane at the sensitization form surface-coated of opto-electronic conversion chip, to see through the light of specific wavelength, carries out the image false distinguishing, realizes the true and false of identification note, certificate etc. with exploitation.
Embodiment 1: as shown in Figure 2, a kind of image read-out, be provided with passive framework 1, be provided with optical lens 2 in the framework, one side of optical lens is provided with light source 3, the opposite side of optical lens also can arrange light source 5, can be provided with transparent panel 4 on the lens 2, the below of lens 2 is provided with circuit base plate 6, be positioned on the circuit base plate 6 lens 2 under be provided with side by side opto-electronic conversion chip 8 and opto-electronic conversion chip 9 on the same plane, the light that light source 3 and light source 5 send, seeing through transparent panel 4 shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel 4 and enters optical lens 2, shine from optical lens 2 reverberation out on the sensitization form of opto-electronic conversion chip 8 and opto-electronic conversion chip 9, opto-electronic conversion chip 8 and decorate conversion chip 9 simultaneously and respectively the light signal that receives is converted to the signal of telecommunication is finished the image information scanning process of scanned object.
Embodiment 2: as shown in Figure 3, a kind of image read-out, it is provided with passive framework 1, be provided with optical lens 2 in the framework 1, one side of optical lens 2 is provided with light source 3, the opposite side of optical lens also can arrange light source 5, can be provided with transparent panel 4 on the lens 2, the below of lens 2 is provided with circuit base plate 6, be positioned on the circuit base plate 6 lens 2 under be provided with side by side opto-electronic conversion chip 8 and opto-electronic conversion chip 9 on the same plane, the opto-electronic conversion chip that is characterized in a side is higher than the opto-electronic conversion chip thickness of opposite side, and the sensitization form upper surface of two row's opto-electronic conversion chips is not on a horizontal plane.The light that light source 3 and light source 5 send, seeing through transparent panel 4 shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel 4 and enters optical lens 2, shine the sensitization form surface of opto-electronic conversion chip 8 and opto-electronic conversion chip 9 from optical lens 2 reverberation out, opto-electronic conversion chip 8 and opto-electronic conversion chip 9 also convert the light signal that receives to the signal of telecommunication respectively simultaneously, finish the image information scanning process of scanned object.
Embodiment 3: as shown in Figure 4, a kind of image read-out, be provided with passive framework 1, be provided with optical lens 2 in the framework 1, one side of optical lens 2 is provided with light source 3, the opposite side of optical lens 2 also arranges light source 5, can be provided with transparent panel 4 on the lens 2, the below of lens 2 is provided with circuit base plate 6, be positioned on the circuit base plate 6 lens 2 under be provided with side by side opto-electronic conversion chip 8 and opto-electronic conversion chip 9 on the same plane, be characterized in the consistency of thickness of two row's opto-electronic conversion chips, the opto-electronic conversion chip of one side is arranged with bench-type structure 12, the photosurface of two row's opto-electronic conversion chips is on the different horizontal planes, the light that light source 3 and light source 5 send, seeing through transparent panel 4 shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel 4 and enters optical lens 2, from the surface that optical lens 2 reverberation out shines opto-electronic conversion chip 8 and decorates conversion chip 9, opto-electronic conversion chip 8 and opto-electronic conversion chip 9 also convert the light signal that receives to the signal of telecommunication respectively simultaneously, finish the image information scanning process of scanned object.
Embodiment 4: as shown in Figure 2, a kind of image read-out, be provided with passive framework 1, be provided with optical lens 2 in the framework 1, one side of optical lens 2 is provided with light source 3, the opposite side of optical lens also arranges light source 5, light source 5 is ultraviolet light, can be provided with transparent panel 4 on the lens 2, the below of lens 2 is provided with circuit base plate 6, be positioned on the circuit base plate 6 lens 2 under be provided with side by side opto-electronic conversion chip 8 and opto-electronic conversion chip 9 on the same plane, opto-electronic conversion chip 8 occupy different photosensitive pixel density with opto-electronic conversion chip 9, such as Fig. 5, sensitization form 15, one side at sensitization form 16 places is towards the centre, and photoelectricity changes a side that turns chip basal body 12 and 13 places and arranges outwardly.The light that light source 3 and light source 5 send, seeing through transparent panel 4 shines on the scanned object, a part of reverberation on the scanned object sees through transparent panel 4 and enters optical lens 2, shine the sensitization form surface of opto-electronic conversion chip 8 and opto-electronic conversion chip 9 from optical lens 2 reverberation out, opto-electronic conversion chip 8 and decorate conversion chip 9 simultaneously and respectively the light signal that receives is converted to the signal of telecommunication is finished the image information scanning process of scanned object.
Claims (2)
1. image read-out, comprise passive framework, be provided with optical lens in the framework, the side of optical lens is provided with light source, can be provided with transparent panel on the lens, the below of lens is provided with circuit base plate, it is characterized in that circuit base plate is provided with the different opto-electronic conversion chip of two row's photosensitive pixel density, the thickness of two row's opto-electronic conversion chips is identical, the sensitization form of two row's opto-electronic conversion chips is positioned on the different horizontal planes, the sensitization form of every row's opto-electronic conversion chip is positioned at the same level face, and wherein row's opto-electronic conversion chip has the bench-type structure, and the sensitization form surface-coated of opto-electronic conversion chip has the optical filtering glued membrane.
2. image read-out, comprise passive framework, be provided with optical lens in the framework, the side of optical lens is provided with light source, can be provided with transparent panel on the lens, the below of lens is provided with circuit base plate, it is characterized in that circuit base plate is provided with the different opto-electronic conversion chip of two row's photosensitive pixel density, the thickness of two row's opto-electronic conversion chips is different, the sensitization form of two row's opto-electronic conversion chips is positioned on the same level face, the sensitization form of every row's opto-electronic conversion chip is positioned at the same level face, and the sensitization form surface-coated of opto-electronic conversion chip has the optical filtering glued membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910014019 CN101783854B (en) | 2009-01-21 | 2009-01-21 | Image reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910014019 CN101783854B (en) | 2009-01-21 | 2009-01-21 | Image reading device |
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| CN101783854A CN101783854A (en) | 2010-07-21 |
| CN101783854B true CN101783854B (en) | 2013-01-16 |
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| CN 200910014019 Active CN101783854B (en) | 2009-01-21 | 2009-01-21 | Image reading device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645237Y (en) * | 2003-05-12 | 2004-09-29 | 山东华菱电子有限公司 | CMOS mode image reading sensor chip |
| CN1735123A (en) * | 2004-08-13 | 2006-02-15 | 菱光科技股份有限公司 | Contact type image scanner with multi-focus and multi resolution ratio |
| CN201341178Y (en) * | 2009-01-21 | 2009-11-04 | 威海华菱光电有限公司 | Contact type image sensor |
| CN101783855A (en) * | 2009-01-21 | 2010-07-21 | 威海华菱光电有限公司 | Contact-type image sensor |
-
2009
- 2009-01-21 CN CN 200910014019 patent/CN101783854B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645237Y (en) * | 2003-05-12 | 2004-09-29 | 山东华菱电子有限公司 | CMOS mode image reading sensor chip |
| CN1735123A (en) * | 2004-08-13 | 2006-02-15 | 菱光科技股份有限公司 | Contact type image scanner with multi-focus and multi resolution ratio |
| CN201341178Y (en) * | 2009-01-21 | 2009-11-04 | 威海华菱光电有限公司 | Contact type image sensor |
| CN101783855A (en) * | 2009-01-21 | 2010-07-21 | 威海华菱光电有限公司 | Contact-type image sensor |
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| Publication number | Publication date |
|---|---|
| CN101783854A (en) | 2010-07-21 |
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Owner name: WEIHAI HUALING OPTO-ELECTRONICS CO., LTD. Free format text: FORMER NAME: WEIHAI HUALING OPTOELECTRONIC CO., LTD. |
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Address after: 264209 Weihai high tech Industrial Development Zone, Shandong Torch Road, No. 159 Patentee after: Weihai Hualing Opto-electronics Co.,Ltd. Address before: 264200 Torch Road, hi tech Industrial Development Zone, Shandong, Weihai 159 Patentee before: Weihai Hualing Optoelectronic Co., Ltd. |