CN2428763Y - Light-source micro-regulation device - Google Patents
Light-source micro-regulation device Download PDFInfo
- Publication number
- CN2428763Y CN2428763Y CN 00236138 CN00236138U CN2428763Y CN 2428763 Y CN2428763 Y CN 2428763Y CN 00236138 CN00236138 CN 00236138 CN 00236138 U CN00236138 U CN 00236138U CN 2428763 Y CN2428763 Y CN 2428763Y
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- CN
- China
- Prior art keywords
- light
- bearing
- light source
- regulation device
- source
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Abstract
The utility model relates to a light source trimming device, which is arranged in an optical system and can be used in an optical scanner. The utility model comprises a driving unit, a transmission unit, a supporting seat and a guiding device, wherein, one end of the supporting seat is connected with the transmission unit and is provided at least one light source; the guiding device is connected with the other end of the supporting seat to limit the movement direction of the supporting seat. The transmission unit and the supporting seat are driven by the driving unit so that the supporting seat generates displacement, and the intensity that the light source irradiates an object to be scanned is changed by the distance between the adjusting light source and the object to be scanned.
Description
The utility model relates to a kind of Light-source micro-regulation device, is meant a kind of Light-source micro-regulation device that can adjust the intensity of light source that is used for optical scanner especially.
The principle of optical scanner (scanner) be with light source projects to object to be scanned, (charge couple device CCD), reads to change into digital signal again its reflected light nationality to be incident upon charge coupled cell by optical mirror slip group labour.Optical scanner for commonly used generally comprises optical system, charge coupled cell, and the one scan kinematic train.In same optical scanner, have multiple different scanning resolution, as 100dpi (dot per inch), 150dpi ... 1200dpi etc.Usually high resolving power is long more required sweep time more, needs 5ms approximately as 100dpi, and 1200dpi needs 20ms approximately.Be described as follows from the output voltage formula of CCD: V=E * Reb * t; E: the intensity of light source; Reb:CCD responsiveness (be a parameter value, with regard to same CCD, this value is constant); The t:CCD time shutter; When high resolution scanning, need to use the CCD output voltage V higher usually than low resolution, to overcome unnecessary electronics noise, promote quality of scanned image.And in known optical scanner, light source is for fixing, therefore often need look different resolution requirements and changes CCD time shutter t.
In view of this, the purpose of this utility model just is to provide a kind of Light-source micro-regulation device, and it can offer the two or more intensity of light source of optical scanner and multiple scanning resolution under the situation that does not change the time shutter, thereby improve the usability of optical scanner, and improve quality of scanning.
The utility model provides a kind of Light-source micro-regulation device, is applied in the optical scanner, and this optical scanner comprises that at least one places the platform of object to be scanned, and this Light-source micro-regulation device comprises: a driver element; One gear unit is connected with this driver element; One bearing, an end connects this gear unit; At least one light source is disposed on this bearing; And a guidance device, be connected with the other end of this bearing.
Described driver element comprises a motor.Also include a light source path on the described bearing.
The end that described bearing links to each other with gear unit can be thread end, can establish a screw on it.Described gear unit comprises a screw rod, and this screw rod passes the screw of this thread end, is connected with a joggle with this bearing.
Described guidance device comprises: a slide rail; And a guide block, this guide block links to each other with the other end of this bearing, and is slidingly connected in slide rail, in order to the direction of motion of restriction bearing.
Light-source micro-regulation device provided by the utility model, be the displacement of nationality by bearing, it is the change of distance between light source and the scanning object, offer two or more intensity of light source E of optical scanner and scanning resolution, can adjust the different intensities of light source for different resolution requirements, in the hope of under identical CCD time shutter t, obtain different CCD output voltage V.Thereby reach the usability that improves optical scanner, and improve the effect of quality of scanning.
Below in conjunction with drawings and the specific embodiments the utility model is further described in more detail.
Fig. 1 is the front elevational schematic of the utility model Light-source micro-regulation device one preferred embodiment.
Please refer to Fig. 1, wherein Fig. 1 be the utility model Light-source micro-regulation device a preferred embodiment front elevational schematic.Light-source micro-regulation device of the present utility model is to be applied in the optical scanner, and it has a motor 204, can adjust the action of the intensity of light source according to the demand of user for resolution.Screw rod 208 can cooperate the driving of motor 204 and rotates.Bearing 203 comprises two ends, and thread end 206 and screw rod 208 are connected with engagement system; Guide block end 205 matches with slide rail 200.Thread end 206 with the engagement system of screw rod 208 is, attacks screw on thread end 206, and screw rod 208 passes the screw of thread end 206, and takes this to drive bearing 203 and produce displacements; Guide block end 205 is that slide rail 200 passes guide block end 205 with the fit system of slide rail 200, makes bearing 203 to slide in slide rail 200 by guide block end 205.Light source 210 and 212 places on the bearing 203, can be with bearing 203 motions.On the bearing 203, also include light source path 207, this light source path 207 is a transmission region.And platform 226 is the position of placement object to be scanned (not illustrating) in the optical scanner among the figure, such as placing file.
When optical scanner demand high resolving power, motor 204 can rotate by drive screw 208, and drive bearing 203 motions, make light source and object distance H to be scanned shorten, simultaneously light 228,230 can be incident to object to be scanned on the platform 226 from light source 212,210, and reflex to mirror surface group 214,216,218,220 in regular turn via light source path 207, be sent to charge coupled cell 224 through lens 222 again.
When optical scanner demand low resolution, motor 204 can rotate by drive screw 208, and drive bearing 203 motions, make light source 210,212 and object distance H to be scanned increase, light 228,230 can be incident to object to be scanned from light source 212,210 simultaneously, and reflex to mirror surface group 214,216,218,220 in regular turn via light source path 207, be sent to charge coupled cell 224 through lens 222 again.
Though the foregoing description is an example with the distance that scanned object and light source 210,212 are waitd upon in change only, and provide two or more intensity of light source adjustment, yet being familiar with this operator should know, according to spirit of the present utility model, also can design light sources and have a plurality of light sources, and arrange a plurality of light source switchs, perhaps adjust the brightness of light source itself, and cooperate with above-mentioned Light-source micro-regulation device, and provide the more scanning resolutions of optical scanner to select.Yet Light-source micro-regulation device of the present utility model also can be installed in other optical systems, and the multiple intensity of light source can be provided.In addition; the distance of above-mentioned adjustment light source and object to be scanned drives bearing generation displacement by screw rod and reaches; yet being familiar with this operator should know; also can replace it by other gearings; such as cam gear or belt pulley set etc., these a little changes should be still within protection domain of the present utility model.
Therefore, the above only is a preferred embodiment of the present utility model, is not to be used to limit protection domain of the present utility model.
Claims (6)
1, a kind of Light-source micro-regulation device is applied in the optical scanner, and this optical scanner comprises that at least one places the platform of object to be scanned, it is characterized in that this Light-source micro-regulation device comprises:
One driver element;
One gear unit is connected with this driver element;
One bearing, an end connects this gear unit;
At least one light source is disposed on this bearing; And
One guidance device is connected with the other end of this bearing.
2, Light-source micro-regulation device according to claim 1, it is characterized in that: described driver element comprises a motor.
3, Light-source micro-regulation device according to claim 1 is characterized in that: also include a light source path on the described bearing.
4, Light-source micro-regulation device according to claim 1 is characterized in that: the end that described bearing links to each other with gear unit can be thread end, can establish a screw on it.
5, according to claim 1 or 4 described Light-source micro-regulation devices, it is characterized in that: described gear unit comprises a screw rod, and this screw rod passes the screw of this thread end, is connected with a joggle with this bearing.
6, Light-source micro-regulation device according to claim 1, it is characterized in that: described guidance device comprises:
One slide rail; And
One guide block, this guide block links to each other with the other end of this bearing, and is slidingly connected in slide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00236138 CN2428763Y (en) | 2000-06-08 | 2000-06-08 | Light-source micro-regulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00236138 CN2428763Y (en) | 2000-06-08 | 2000-06-08 | Light-source micro-regulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2428763Y true CN2428763Y (en) | 2001-05-02 |
Family
ID=33597731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00236138 Expired - Fee Related CN2428763Y (en) | 2000-06-08 | 2000-06-08 | Light-source micro-regulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2428763Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368863C (en) * | 2004-09-16 | 2008-02-13 | 亚洲光学股份有限公司 | Adjustable light source module and its incident light quantity regulator |
-
2000
- 2000-06-08 CN CN 00236138 patent/CN2428763Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368863C (en) * | 2004-09-16 | 2008-02-13 | 亚洲光学股份有限公司 | Adjustable light source module and its incident light quantity regulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |