CN1155219C - Light source synchronizing system for transparent medium scanner - Google Patents
Light source synchronizing system for transparent medium scanner Download PDFInfo
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- CN1155219C CN1155219C CNB981226868A CN98122686A CN1155219C CN 1155219 C CN1155219 C CN 1155219C CN B981226868 A CNB981226868 A CN B981226868A CN 98122686 A CN98122686 A CN 98122686A CN 1155219 C CN1155219 C CN 1155219C
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Abstract
The present invention relates to a light source synchronizing system for a transparent sheet scanner, which utilizes magnetic force, etc. to provide a fixed connection relation between a light source of the transparent sheet scanner and a sensor in scanning the transparent sheet, and then, the light source of the transparent sheet scanner and the sensor are simultaneously driven only by one motor, and hereby, errors created by different driving devices of motors or gears, etc. are avoided so as to ensure that the light source of the transparent sheet scanner and the sensor synchronously move and avoid that the scan quality becomes poor due to the intensity distribution variation of the light source.
Description
Technical field
The present invention relates to a kind of scanner, particularly a kind of platform-type transparent medium scanner, and relate more specifically to a kind of light source synchronizing system for transparent medium scanner.
Background technology
Platform-type scanner generally is to be used for opaque contribution is carried out reflective scanning, and the contribution that it utilizes lamp luminescence irradiation to be scanned utilizes optical system to make the ray cast that is reflected to sensing apparatus again.Because fluorescent tube all keeps identical distance when scanning with between the contribution that is scanned, so the luminous intensity that is radiated on the contribution is identical.Again because being scanned the distance of contribution and sensing apparatus when scanning also is maintained fixed, so along the direction that scans, the received image of sensing apparatus can not have the inconsistent situation of light and shade because of the variation of distance.The gray scale variation of image on the fluorescent tube direction that is caused as for the non-uniform light of fluorescent tube own, then can utilize a correcting sheet before scanning, to set up the benchmark of a brightness earlier, proofread and correct the signal of each pixel on the sensing apparatus during mat scanning, make sensing apparatus only determine the size of signal, thereby exclude because of the bright variation that is secretly caused of light source according to the deep or light variation on the contribution.
If will carry out the scanning of transmission contribution, generally provide one group of slide sweep attachment (transparency kit), so that transmission original text light source to be provided in the scanning process, light source must pass contribution from the opposite side of transmission contribution, enters in the optical system of contribution below again.Please refer to shown in Figure 1A, the 1B, when light source 12 is non-parallel light, and the relative position of this light source and sensor 10 is when changing, and the light intensity that sensor 10 is sensed distributes and also will change to some extent.Therefore, for scanner, when slide scans, the light source 12 necessary same moved further of sensor 10 and contribution top, inconsistent slightly as if when mobile, having, then shown in Figure 1B, owing to unstable the changing of light intensity distribution that sensor 10 is experienced, scanning quality is with variation.
See also shown in Figure 2, the moving part formula that is designed to of general transparent medium scanner annex, it utilizes motor 14,24 to cooperate belts 16,26 to drive fluorescent tube 18,28 as light source, when scanning slide 22, distinguish the motor 14 of controlling and driving sensor 20 and the motor 24 of the light source that drives the transparent medium scanner annex again, use the light source 28 same moved further that make sensor 20 and contribution top.But, because the error that motor itself exists, the error that gear out of roundness difference is caused, even be the error that the driving module of motor is produced, all can cause inevitably light source 28 in the transparent medium scanner annex with sensor 20 when mobile at the same time relative position change.Therefore, the existing scanner of this kind is in scanning during slide, and stable and good scanning quality can't be provided.
Summary of the invention
The object of the present invention is to provide a kind of light source synchronizing system for transparent medium scanner, it can guarantee transparent medium scanner light source and the same moved further of sensor, the scanning quality variation that causes with the intensity distribution variation of avoiding because of light source.
The object of the present invention is achieved like this, and a kind of scanner light source synchro system promptly is provided, comprising: one scan device body comprises: optical system in order to the light of accepting to be reflected by contribution, and makes the contribution imaging; One sensing apparatus is in order to receive the picture of the contribution that forms via described optical system; First light source carries out the required light source of reflective scanning mode in order to provide to the opaque contribution that is scanned; One drive unit in order to drive described sensing apparatus via transmission device, is used the contribution that scanning is scanned; First magnetic devices is arranged at the described first light source two ends; And a transparent medium scanner annex, comprising: secondary light source is arranged at the opposite side of the contribution that is scanned, in order to provide the scanning slide required light source with respect to described first light source; Second magnetic devices is arranged at described secondary light source two ends, and wherein, described first magnetic devices and described second magnetic devices are all electromagnet, and perhaps one is electromagnet, and another is can be by the material of magnetic attraction; When scanner scanned slide, described electromagnet was activated, and made described second magnetic devices and described first magnetic devices attract each other, and used making described secondary light source and the same moved further of described sensing apparatus; When scanner scanned opaque flakes, described electromagnet was not activated, and made described second magnetic devices and described first magnetic devices not attract each other, and same moved further does not take place for described secondary light source and described sensing apparatus.
According to a further aspect in the invention, provide a kind of light source synchronizing system for transparent medium scanner, comprising: optical system in order to the light of accepting to be reflected by contribution, and makes the contribution imaging; Sensing apparatus is in order to receive the picture of the contribution that forms via described optical system; Drive unit in order to drive described sensing apparatus via transmission device, is used the contribution that scanning is scanned; Light source is arranged at the opposite side of manuscript to be scanned respectively with the Image sensor apparatus of scanner, in order to provide the scanning slide required light source; First magnetic devices is arranged at the two ends of described light source and in order to second magnetic devices on the bracing frame that described Image sensor apparatus is set; Wherein, described first magnetic devices and described second magnetic devices are all electromagnet, and perhaps one is electromagnet, and another is can be by the material of magnetic attraction; When slide is scanned, describedly be activated by electromagnet, use making described light source and the same moved further of sensing apparatus; When slide not being scanned, described electromagnet is not activated
The present invention has given up existing scanner drives transparent medium scanner light source and sensor respectively with different motors mode, and a relation that links is provided between transparent medium scanner light source and sensor, only drive transparent medium scanner light source and sensor simultaneously then, to avoid the errors that drive unit was caused such as different motor or gear with a motor.
In the present invention, the binding between above-mentioned transparent medium scanner light source and sensor realizes in the mode of magnetic force, but except magnetic force, also can other different modes, the binding between transparent medium scanner light source and sensor for example mechanically is provided., transparent medium scanner light source and sensor have the relation of rigid body in case linking mutually, then the relative position between transparent medium scanner light source and sensor just can be maintained fixed constant when scanning, thus, in scanning process, the light intensity of the light source that sensor senses distributes and can fix, thereby can not have influence on scanning quality.
Description of drawings
Below in conjunction with accompanying drawing, embodiments of the invention are described, wherein:
Figure 1A, 1B illustrate position and the light intensity distribution relation figure on plane when non-parallel light source projects is on the plane.
Fig. 2 is the STRUCTURE DECOMPOSITION figure of existing transparent medium scanner and scanner annex.
Fig. 3 is the structure chart of an embodiment of light source synchronizing system for transparent medium scanner of the present invention.
Fig. 4 is the interior structural perspective of transparent medium scanner annex of one embodiment of the invention.
Embodiment
See also one embodiment of the invention shown in Figure 3, light source synchronizing system for transparent medium scanner comprises an one scan device body 30 and a transparent medium scanner annex 40.Wherein, the light source in the scanner body 30 and transparent medium scanner annex 40 interior light sources utilize magnetic force to attract each other and secure bond together.
As shown in Figure 3, this scanner body 30 comprises: first light source 31, carry out the required light source of reflective scanning mode in order to the opaque contribution 32 to being scanned to be provided; One drive unit 33 in order to drive first light source 31 via transmission device, is used the contribution 32 that scanning is scanned; Optical system 34 in order to the light of accepting to be sent and to be reflected by contribution 32 by first light source 31, and makes contribution 32 imagings; One sensing apparatus 35 is in order to receive the picture of the contribution 32 that forms via optical system 34; Reach first pair of magnetic devices 36, be arranged at the two ends of first light source 31.
40 of this transparent medium scanner annexes comprise: secondary light source 42 is arranged at the opposite side of the contribution 32 that is scanned with respect to this first light source 31, in order to provide the scanning slide required light source; Second pair of magnetic devices 44, be arranged at the two ends of secondary light source 42, when scanning, can attract each other with this first pair of magnetic devices 36, make secondary light source 42 along with first light source 31 moves, because the sensing apparatus 35 and first light source 31 in the present embodiment are set together, so secondary light source 42 is able to and sensing apparatus 35 same moved further.
This first pair of magnetic devices 36 can be the electromagnet that is arranged on first light source, 31 both sides, do not have magnetic at ordinary times, but when carrying out slide scanning, can produce magnetic force, drive secondary light source 42, make the secondary light source 42 and first light source 31 and sensing apparatus 35 same moved further by electric power.As for this second pair of magnetic devices 44 can be any can be by the material of magnetic attraction, certain magnet or electromagnet that preferably has magnetic, so can and 36 of the first pair of magnetic devices produce firm magnetic attraction, can synchronously move along with first light source 31 and sensor 35 to guarantee secondary light source 42.The position is set that is to say that corresponding to the position of first pair of magnetic devices 36 second pair of magnetic devices 44 should be separately positioned on the opposite side of the scanning platform of scanner with first pair of magnetic devices 36 of this second pair of magnetic devices 44.
This first light source 31 all can adopt the existing employed fluorescent tube of scanner with secondary light source 42.As for this sensing apparatus 35, identical with general scanner, can be charge coupled device (CCD), or other Photosensing Units.This drive unit 33 can be a stepper motor, and transmission device then can comprise gear 33a and belt 33b.34 of this optical systems comprise speculum 34a and focusing arrangement 34b, for example lens or set of lenses etc.
In addition, see also Fig. 4, it is noted that this secondary light source 42 is arranged on the slide rail 46 that is parallel to each other, and can move along identical direction.And secondary light source 42 can freely move on slide rail, and slide rail is all minimum to the friction or the obstruction of secondary light source, to avoid having influence on secondary light source 42 with respect to the same moved further of first light source 31 with sensing apparatus 35.
Though only proposed to utilize magnetic force in the above-described embodiments, make the light source in intrinsic light source of scanner and transparent medium scanner annex synchronously to move, but, any personage who knows this technology, under the situation that does not break away from spirit of the present invention and category, all can replace the mode of using magnetic easily in a different manner, for example can mechanically make two light source fixed connections, make it can same moved further.
Claims (9)
1. scanner light source synchro system, wherein, comprising: one scan device body comprises: optical system in order to the light of accepting to be reflected by contribution, and makes the contribution imaging; One sensing apparatus is in order to receive the picture of the contribution that forms via described optical system; First light source carries out the required light source of reflective scanning mode in order to provide to the opaque contribution that is scanned; One drive unit in order to drive described sensing apparatus via transmission device, is used the contribution that scanning is scanned; First magnetic devices is arranged at the described first light source two ends; And a transparent medium scanner annex, comprising: secondary light source is arranged at the opposite side of the contribution that is scanned, in order to provide the scanning slide required light source with respect to described first light source; Second magnetic devices is arranged at described secondary light source two ends, and wherein, described first magnetic devices and described second magnetic devices are all electromagnet, and perhaps one is electromagnet, and another is can be by the material of magnetic attraction; When scanner scanned slide, described electromagnet was activated, and made described second magnetic devices and described first magnetic devices attract each other, and used making described secondary light source and the same moved further of described sensing apparatus; When scanner scanned opaque flakes, described electromagnet was not activated, and made described second magnetic devices and described first magnetic devices not attract each other, and same moved further does not take place for described secondary light source and described sensing apparatus.
2. light source synchronizing system as claimed in claim 1 is characterized in that, described first light source and secondary light source are fluorescent tube.
3. light source synchronizing system as claimed in claim 1 is characterized in that, described sensing apparatus is CCD.
4. light source synchronizing system as claimed in claim 1 is characterized in that, described drive unit is a motor.
5. light source synchronizing system as claimed in claim 1 is characterized in that described secondary light source is arranged on the slide rail that is parallel to each other.
6. light source synchronizing system for transparent medium scanner, wherein, it comprises: optical system in order to the light of accepting to be reflected by contribution, and makes the contribution imaging; Sensing apparatus is in order to receive the picture of the contribution that forms via described optical system; Drive unit in order to drive described sensing apparatus via transmission device, is used the contribution that scanning is scanned; Light source is arranged at the opposite side of manuscript to be scanned respectively with the Image sensor apparatus of scanner, in order to provide the scanning slide required light source; First magnetic devices is arranged at the two ends of described light source and in order to second magnetic devices on the bracing frame that is arranged on described Image sensor apparatus; Wherein, described first magnetic devices and described second magnetic devices are all electromagnet, and perhaps one is electromagnet, and another is can be by the material of magnetic attraction; When slide was scanned, described electromagnet was activated, and nationality is so that the same moved further of described light source and sensing apparatus; When slide not being scanned, described electromagnet is not activated.
7. light source synchronizing system as claimed in claim 6 is characterized in that, described light source is a fluorescent tube.
8. light source synchronizing system as claimed in claim 6 is characterized in that, described Image sensor apparatus is CCD.
9. light source synchronizing system as claimed in claim 6 is characterized in that described light source is arranged on the slide rail that is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981226868A CN1155219C (en) | 1998-11-24 | 1998-11-24 | Light source synchronizing system for transparent medium scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981226868A CN1155219C (en) | 1998-11-24 | 1998-11-24 | Light source synchronizing system for transparent medium scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1255012A CN1255012A (en) | 2000-05-31 |
| CN1155219C true CN1155219C (en) | 2004-06-23 |
Family
ID=5227852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB981226868A Expired - Fee Related CN1155219C (en) | 1998-11-24 | 1998-11-24 | Light source synchronizing system for transparent medium scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155219C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005203987A (en) * | 2004-01-14 | 2005-07-28 | Brother Ind Ltd | Image reading apparatus |
| TWI253844B (en) | 2005-01-28 | 2006-04-21 | Lite On Technology Corp | Scanner with a locking module |
-
1998
- 1998-11-24 CN CNB981226868A patent/CN1155219C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1255012A (en) | 2000-05-31 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20040623 |