CN102984424B - Contact image sensor - Google Patents
Contact image sensor Download PDFInfo
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- CN102984424B CN102984424B CN201210550509.4A CN201210550509A CN102984424B CN 102984424 B CN102984424 B CN 102984424B CN 201210550509 A CN201210550509 A CN 201210550509A CN 102984424 B CN102984424 B CN 102984424B
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Abstract
The invention discloses a linear array image reading device which comprises a first image sensor capable of reading the whole breadth of a manuscript, and a second image sensor capable of reading a local scope of the manuscript, wherein the two image sensors are connected with each other and can read a focal position of the manuscript; an illuminating direction of an illuminant and a scanning direction of the second image sensor are different from those of the first image sensor, and can be adjusted and changed; the second image sensor and the first image sensor independently read image signals and transmit outwards respectively; the first sensor is used for reading conventional images of the manuscript; the second sensor is used for programming to conduct program control on a rotation angle of a stepping motor according to requirements of the images to be scanned; the stepping motor drives the second image sensor to rotate to automatically adjust the illuminating direction of the illuminant and the reading direction so as to read unconventional images of the manuscript; as the two image sensors can read the image independently, the simultaneous reading of the conventional images and the unconventional images is realized; and the recognition capability of the image reading device to the special manuscript is improved.
Description
Technical field
The present invention relates to field of image sensors, specifically a kind ofly can read normal image, also can read contact-type image sensor and the control method thereof of hologram image or color shifting ink image.
Background technology
Fig. 1 is the sectional drawing of existing linear image reading device, in figure, 1 is the line lighting source that can send light uniform irradiation original copy, the 2nd, the lens that extend upwardly to whole read range and original copy reverberation can be focused at the Vertical Square of original copy moving direction, the 3rd, a plurality of sensor chips for receiver lens 2 light that converges that are arranged in a straight line, the 4th, the sensor base plate of lift-launch the sensor chip, the 6th, hold light source 1, lens arra 2, the framework of sensor base plate 4, 5 are arranged on the glass plate of the lift-launch original copy on framework 6, the 7th, the socket that is used to sensor base plate power supply or control signal to be provided and the view data reading is outwards transmitted arranging on sensor base plate.
In above-mentioned image read-out, the light that light source 1 sends, see through glass plate 5, be irradiated on the original copy 8 of outside, the word black region light on original copy 8 is absorbed, and in other white undercolor region of original copy, light almost 100% is reflected, these reverberation through glass plate 5, are collected by lens arra 2 again, are irradiated on the sensor chip 3 carrying on sensor base plate 4.Under control at sensor chip 3 at internal circuit, convert the light signal receiving to the signal of telecommunication, and through overdrive circuit output, finally by interface 7, as image (word) information, outwards export.Original copy constantly moves, and the image information of recording on it (word) will be read continuously.
But above-mentioned linear image reading device is because the direction of illumination of light source is fixed, read direction is also fixed, so can only read the normal image of original copy, can read the coloured image of original copy when configured red-green-blue in light source, in light source, can read the infrared image of original copy during configuration infrared light.For images such as the hologram image comprising in the marketable securities such as bank note or color shifting inks, need to change the correctly original copy of reading images of light source direction of illumination or read direction, existing image read-out is just helpless.
Recently also have some image read-outs within it portion added other one group of light source that direction of illumination is different, use two groups of different light sources of direction of illumination to carry out reading of different directions to the image of color shifting ink, but still can not read hologram image, and this image read-out just can only can not read original normal image for reading color shifting ink image when reading color shifting ink image.
In sum, there is following problem in existing linear image reading device: because conventional images reading device can only read normal image, maybe can only read color shifting ink image, can not read the hologram image in special original copy, image that can not two kinds of character reads simultaneously, affect the identification of special original copy, also to use, caused very large inconvenience.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and can read normal image, also can read the Non-Conventional imageries such as hologram image or color shifting ink image, and normal image and Non-Conventional imagery can be realized the linear image reading device simultaneously reading.
The present invention can reach by following measure:
A linear image reading device, is characterized in that comprising for reading the first imageing sensor of the whole breadth width of original copy and for reading the second imageing sensor of original copy subrange,
Described the first imageing sensor at least comprises first light source that can irradiate the whole read range of original copy, Vertical Square at original copy moving direction extends upwardly to the first lens that whole read range also can focus on original copy reverberation, a plurality of be arranged in a straight line can receive the first sensor chip that first lens converges light, carry the first sensor substrate of aforementioned first sensor chip, and the first framework that holds above-mentioned the first light source, first lens, first sensor substrate
Described the second imageing sensor at least comprises the secondary light source that can irradiate original copy part scope, receive the second lens of the light of original copy reflection secondary light source, receive the second sensor chip that the second lens mirror converges light, carry the second sensor base plate of aforementioned the second sensor chip, and the second framework that holds above-mentioned secondary light source, the second lens, the second sensor base plate
The second imageing sensor and the first imageing sensor interconnect, can read the focal position of original copy simultaneously, with respect to the first imageing sensor, the light source direction of illumination of the second imageing sensor can be Bu Tong with scanning direction and can adjust change, the also outwards transmission respectively of reading images signal independently of each other of the second imageing sensor and the first imageing sensor.
The first imageing sensor of the present invention is provided with support, the second imageing sensor is connected with support through rotating shaft, rotating shaft is connected with the stepping motor on support, stepping motor is connected with singlechip controller, stepping motor is controlled its anglec of rotation by singlechip controller, stepping motor directly or be connected with rotating shaft by transmission device, rotating shaft drives the second imageing sensor to rotate to the angle that scanning direction needs, transmission device can adopt belt transmissioning mode, also can adopt gear transmission mode.
The quantity of the hologram image that the present invention can require and need to read according to the angle of image reading, at least two the second imageing sensors are set, each second imageing sensor is connected with stepping motor respectively, stepping motor is connected with singlechip controller, to control respectively the scanning direction of each the second image sensing, also can share a stepping motor, stepping motor is connected with singlechip controller, the rotating shaft of each second image sensing is connected by transmission device, singlechip controller is through stepping motor, transmission device is controlled the scanning direction of each the second image sensing
First sensor of the present invention is for reading the normal image of original copy, the second transducer programs according to the needs of required scan image, the program control stepping motor anglec of rotation, stepping motor is direct or drive the rotating shaft being connected with the second imageing sensor to rotate by transmission device, thereby drive the second imageing sensor rotation, , automatically adjust light source direction of illumination and read direction, to read the Non-Conventional imageries such as the color shifting ink image of original copy or hologram image, two image sensings can carry out image reading independently of each other, thereby read when having realized normal image and Non-Conventional imagery, improved the recognition capability of image read-out to special original copy.Meanwhile, the second transducer can be adjusted scanning angle automatically, has both improved efficiency, has expanded range of application, has also greatly improved accuracy, the reliability of angle adjustment.
Accompanying drawing explanation
Fig. 1 is the sectional drawing of existing contact-type image sensor.
Fig. 2 is the section structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 1.
Fig. 3 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 1.
Fig. 4 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 2
Fig. 5 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 3
Fig. 6 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 4
Fig. 7 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 5
Fig. 8 is the flow chart of the control method of the linear image reading device shown in the embodiment of the present invention 1
Mark in figure: the first light source 101, first lens 102, first sensor chip 103, first sensor substrate 104, glass plate 105, the first framework 106, socket 107, secondary light source 201, the second lens 202, the second sensor chip 203, the second sensor base plate 204, glass plate 205, the second framework 206, socket 207, rotating shaft 301, shaft coupling 302, stepping motor 303, single-chip computer control system 304, gear 305, gear 306, belt pulley 307, belt pulley 308, belt 309, arrangement of clutch 310
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
A linear image reading device, is characterized in that comprising for reading the first imageing sensor of the whole breadth width of original copy and for reading the second imageing sensor of original copy subrange,
Described the first imageing sensor at least comprises first light source that can irradiate the whole read range of original copy, Vertical Square at original copy moving direction extends upwardly to the first lens that whole read range also can focus on original copy reverberation, a plurality of be arranged in a straight line can receive the first sensor chip that first lens converges light, carry the first sensor substrate of aforementioned first sensor chip, and the first framework that holds above-mentioned the first light source, first lens, first sensor substrate
Described the second imageing sensor at least comprises the secondary light source that can irradiate original copy part scope, receive the second lens of the light of original copy reflection secondary light source, receive the second sensor chip that the second lens mirror converges light, carry the second sensor base plate of aforementioned the second sensor chip, and the second framework that holds above-mentioned secondary light source, the second lens, the second sensor base plate
The second imageing sensor and the first imageing sensor interconnect, can read the focal position of original copy simultaneously, with respect to the first imageing sensor, the light source direction of illumination of the second imageing sensor can be Bu Tong with scanning direction and can adjust change, the also outwards transmission respectively of reading images signal independently of each other of the second imageing sensor and the first imageing sensor.
The first imageing sensor of the present invention is provided with support, the second imageing sensor is connected with support through rotating shaft, rotating shaft is connected with the stepping motor on support, stepping motor is connected with singlechip controller, stepping motor is controlled its anglec of rotation by singlechip controller, stepping motor directly or be connected with rotating shaft by transmission device, rotating shaft drives the second imageing sensor to rotate to the angle that scanning direction needs, transmission device can adopt belt transmissioning mode, also can adopt gear transmission mode.
The quantity of the hologram image that the present invention can require and need to read according to the angle of image reading, at least two the second imageing sensors are set, each second imageing sensor is connected with stepping motor respectively, stepping motor is connected with singlechip controller, to control respectively the scanning direction of each the second image sensing, also can share a stepping motor, stepping motor is connected with singlechip controller, the rotating shaft of each second image sensing is connected by transmission device, singlechip controller is through stepping motor, transmission device is controlled the scanning direction of each the second image sensing
Embodiment 1: Fig. 2 is the cross-section structure of the linear array images device of the embodiment of the present invention 1, in figure, 101 is first light sources that can send light the whole original copy amplitude of uniform irradiation, the 102nd, the first lens that extends upwardly to whole read range and original copy reverberation can be focused at the Vertical Square of original copy moving direction, the 103rd, a plurality of first sensor chips for receiver lens array 102 light that converges that are arranged in a straight line, the 104th, carry the first sensor substrate of above-mentioned a plurality of sensor chips 103, the 106th, hold light source 101, lens 102, the first framework of sensor base plate 104, 105 are arranged on the glass plate of the lift-launch original copy on framework 106, the 107th, for sensor base plate 104 provides power supply, drive the socket of signal and the picture signal that outwards output is read.Above-mentioned light source 101, lens 102, sensor chip 103, sensor base plate 104, glass plate 105, framework 106 and socket 107 form the first imageing sensor 10, for reading the normal image in the whole amplitude of original copy.
In figure, 201 is at least can irradiate the secondary light source of original copy part scope, the 202nd, receive secondary light source 202 irradiation original copys and produce catoptrical the second lens, the 203rd, receive the second sensor chip that the second lens mirror converges light, the 204th, carry the second sensor base plate of aforementioned the second sensor chip 203, the 206th, hold above-mentioned secondary light source 201, the second lens 201, the second framework of the second sensor base plate 204, 205 are arranged on the glass plate of the lift-launch original copy on framework 206, the 207th, for sensor base plate 204 provides power supply, drive the socket of signal and the picture signal that outwards output is read.Above-mentioned light source 201, lens 202, sensor chip 203, sensor base plate 204, glass plate 205, framework 206 and socket 207 form the second imageing sensors 20, for reading the Non-Conventional imageries such as the local color shifting ink image of original copy or hologram image.
In figure, 301 is the rotating shaft being connected with framework 206, and 302 is the shaft coupling that rotating shaft 301 and stepping motor 303 are coupled together, and 304 is single-chip computer control system.The required angle requirements of Non-Conventional imagery such as the local color shifting ink image reading as required or hologram image, establishment single-chip microcomputer control program, under the control of program, stepping motor 303 rotates a certain angle, the angle that drives the second imageing sensor 20 rotations to need by shaft coupling 302.Which is simple in structure, easy for installation, and precision is high, and according to the performance parameter of existing stepping motor, minimum step angle can reach 0.36 °, so in this embodiment, the anglec of rotation minimum of the second imageing sensor can be controlled at 0.36 °.
Embodiment 2: Fig. 4 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 2, the first imageing sensor 10, the second imageing sensor 20 is identical with example 1 structure, difference is, gear 305 is housed on rotating shaft 301, gear 306 is also housed on the output shaft of stepping motor 303, the required angle requirements of Non-Conventional imagery such as the local color shifting ink image reading as required or hologram image, establishment single-chip microcomputer control program, under the control of program, stepping motor 303 rotates a certain angle, by gear train 305, 306, drive the second imageing sensor 20 to rotate a certain angle.As required, select the gearratio of gear train, can adjust the minimum anglec of rotation of the second imageing sensor 20, improve control precision.
Embodiment 3: Fig. 5 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 3, the first imageing sensor 10, the second imageing sensor 20 is identical with example 1 structure, difference is, belt pulley 307 is housed on rotating shaft 301, belt pulley 308 is also housed on the output shaft of stepping motor 303, the required angle requirements of Non-Conventional imagery such as the local color shifting ink image reading as required or hologram image, establishment single-chip microcomputer control program, under the control of program, stepping motor 303 rotates a certain angle, by belt pulley 307, 308, and belt 309 drives the second imageing sensor 20 to rotate a certain angle.As required, select the gearratio of belt pulley, can adjust the minimum anglec of rotation of the second imageing sensor 20, improve control precision.
Embodiment 4: Fig. 6 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 4, in the aforementioned embodiment, on first imageing sensor 10 sides of reading whole original copy breadth normal image, is only furnished with second image sensing 20 that reads the local Non-Conventional imagery of original copy.Also can configure as required a plurality of the second imageing sensor 20 and automatic adjustment systems.Fig. 6 is furnished with two the second image sensing 20 and automatic adjustment systems that read the local Non-Conventional imagery of original copy on first imageing sensor 10 sides of reading whole original copy breadth normal image.While being equipped with a plurality of the second transducer 20, can be identical between a plurality of the second transducers 20, can be also different.Its automatic adjustment system can all adopt a kind of in above-described embodiment, also can be as required, adopt respectively wherein a kind of.
Embodiment 5: Fig. 7 is the plan structure schematic diagram of the linear image reading device shown in the embodiment of the present invention 5, in the aforementioned embodiment, on first imageing sensor 10 sides of reading whole original copy breadth normal image, can configure a plurality of the second imageing sensors 20 as required, each second imageing sensor 20 is furnished with independent automatic adjustment system.The present embodiment adopts a set of automatic regulating system to control a plurality of the second imageing sensors 20 simultaneously, a plurality of the second imageing sensors 20 can rotate as required simultaneously, also can pass through arrangement of clutch 310, control one of them or several being rotated, to adjust the reading angular of the second imageing sensor 20.Its transmission device can be gear train, belt transmission, can be also shaft coupling, gear train, bel-drivenn combination in any.
Fig. 8 is the flow chart of the control method of the linear image reading device shown in the embodiment of the present invention 4, linear image reading device in this embodiment comprises for reading the first imageing sensor of the whole breadth width of original copy and for reading the second imageing sensor of original copy subrange, particularly, this second imageing sensor passes through automatic adjustment system, adjust scanning direction and angle, the method comprises following step S401, S402, S403 and S404.
Step S401: the quantity of the hologram image reading as required and position; determine quantity and the position of the second transducer; for example; while reading RMB, conventionally have image or the anti-fake mark that need to read separately at several places; this just needs several the second transducers; and the reading angular of each also may be different, so need to be treated differently.
Step S402: the reading angular of the hologram image that need to read according to each, determine the angle that each second transducer need to rotate
Step S403: according to the position of the second transducer and the angle that needs rotation, select the type of transmission device, and calculate the relevant parameters such as gear, belt pulley, motor
Step S404: according to above-mentioned requirements, select drive unit, and work out control program
By above step, can automatically adjust read direction and the position of each the second transducer as required, thereby read each particular image or anti-fake mark.The control method of other embodiment is similar with this, is not repeated!
First sensor of the present invention is for reading the normal image of original copy, the second transducer programs according to the needs of required scan image, the program control stepping motor anglec of rotation, stepping motor is direct or drive the rotating shaft being connected with the second imageing sensor to rotate by transmission device, thereby drive the second imageing sensor rotation, , automatically adjust light source direction of illumination and read direction, to read the Non-Conventional imageries such as the color shifting ink image of original copy or hologram image, two image sensings can carry out image reading independently of each other, thereby read when having realized normal image and Non-Conventional imagery, improved the recognition capability of image read-out to special original copy.Meanwhile, the second transducer can be adjusted scanning angle automatically, has both improved efficiency, has expanded range of application, has also greatly improved accuracy, the reliability of angle adjustment.
Claims (1)
1. a linear image reading device, it is characterized in that comprising for reading the first imageing sensor of the whole breadth width of original copy and for reading the second imageing sensor of original copy subrange, described the first imageing sensor at least comprises first light source that can irradiate the whole read range of original copy, Vertical Square at original copy moving direction extends upwardly to the first lens that whole read range also can focus on original copy reverberation, a plurality of be arranged in a straight line can receive the first sensor chip that first lens converges light, carry the first sensor substrate of aforementioned first sensor chip, and hold above-mentioned the first light source, first lens, the first framework of first sensor substrate, described the second imageing sensor at least comprises the secondary light source that can irradiate original copy part scope, receive the second lens of the light of original copy reflection secondary light source, receive the second sensor chip that the second lens mirror converges light, carry the second sensor base plate of aforementioned the second sensor chip, and hold above-mentioned secondary light source, the second lens, the second framework of the second sensor base plate, described the first imageing sensor is provided with support, the second imageing sensor is connected with support through rotating shaft, the transmission of stepping motor band or gear drive on support are connected with rotating shaft, stepping motor is connected with singlechip controller, stepping motor is controlled its anglec of rotation by singlechip controller, the second imageing sensor and the first imageing sensor interconnect, can read the focal position of original copy simultaneously, with respect to the first imageing sensor, the light source direction of illumination of the second imageing sensor can be Bu Tong with scanning direction and can adjust change, the second imageing sensor and the first imageing sensor be reading images signal outwards transmission respectively independently of each other.
2. linear image reading device according to claim 1, it is characterized in that arranging at least two the second imageing sensors, each second imageing sensor is connected with stepping motor respectively, stepping motor is connected with singlechip controller, controls respectively the scanning direction of each the second image sensing.
3. linear image reading device according to claim 1, it is characterized in that arranging at least two the second imageing sensors, each second imageing sensor shares a stepping motor, stepping motor is connected with singlechip controller, the rotating shaft of each second image sensing is by being with transmission or gear drive to be connected, singlechip controller through stepping motor, with transmission or gear drive, control the scanning direction of each the second image sensing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210550509.4A CN102984424B (en) | 2012-12-18 | 2012-12-18 | Contact image sensor |
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| CN201210550509.4A CN102984424B (en) | 2012-12-18 | 2012-12-18 | Contact image sensor |
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| CN102984424A CN102984424A (en) | 2013-03-20 |
| CN102984424B true CN102984424B (en) | 2014-12-10 |
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| CN105872292B (en) * | 2016-05-18 | 2019-02-19 | 威海华菱光电股份有限公司 | A kind of contact-type image sensor and image-scanning device |
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| TWI220093B (en) * | 2003-07-21 | 2004-08-01 | Avision Inc | Image sensing device and its method |
| CN101860645A (en) * | 2009-04-10 | 2010-10-13 | 威海华菱光电有限公司 | Contact-type image sensor for identifying hologram image |
| CN102917153B (en) * | 2012-11-20 | 2018-01-16 | 威海华菱光电股份有限公司 | linear image reading device |
| CN203072042U (en) * | 2012-12-18 | 2013-07-17 | 威海华菱光电股份有限公司 | Contact image sensor |
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