Scan bar for scanning media sheet in image scanning device and method thereof
View Patent ↗A scan bar for scanning a media sheet in an image scanning device and a method for scanning the media sheet in the image scanning device are disclosed. The scan bar comprises a sensor arrangement and a lens arrangement. The sensor arrangement comprises a first sensor region and a second sensor region. Light reflected from the media sheet is focused by the lens arrangement onto the sensor arrangement. Each of the first sensor region and the second sensor region is capable of generating image data corresponding to the media sheet from the focused light received from the lens arrangement for scanning the media sheet. The image data generated by the first sensor region is of relatively higher resolution than image data generated by the second sensor region.
1. A scan bar for scanning a media sheet in an image scanning device, the scan bar comprising:
a sensor arrangement comprising a first sensor region and a second sensor region; and
a lens arrangement positioned to focus light reflected from the media sheet onto the sensor arrangement,
wherein each of the first sensor region and the second sensor region generates image data corresponding to the media sheet from the focused light received from the lens arrangement,
wherein image data generated by the first sensor region is of relatively higher resolution than image data generated by the second sensor region, and
wherein the reflected light is focused onto at least one of the first sensor region and the second sensor region based upon a target image file size.
2. The scan bar of claim 1 further comprising a light source positioned to illuminate the media sheet for reflecting the light from the media sheet onto the lens arrangement.
3. The scan bar of claim 1 wherein the first sensor region is positioned parallel to the second sensor region in a longitudinal direction of the scan bar.
4. The scan bar of claim 1 wherein a length of the first sensor region is less than a length of the second sensor region in a longitudinal direction of the scan bar.
5. The scan bar of claim 1 wherein the first sensor region and the second sensor region are positioned in a series arrangement along a longitudinal direction of the scan bar.
6. The scan bar of claim 1 wherein the image data generated by the first sensor region has a resolution that is at least twice a resolution of the image data generated by the second sensor region.
7. The scan bar of claim 1 wherein the lens arrangement comprises a first lens component in optical communication with the first sensor region and a second lens component in optical communication with the second sensor region.
8. The scan bar of claim 1 wherein the lens arrangement comprises a lens in optical communication with both the first sensor region and the second sensor region.
9. The scan bar of claim 1 wherein image data generated by the first sensor region has a resolution of about 4800 ppi and image data generated by the second sensor region has a resolution of no more than about 1200 ppi.
10. An image scanning device comprising:
a scan bar for scanning a media sheet in the image scanning device, the scan bar comprising:
a sensor arrangement comprising a first sensor region and a second sensor region;
a lens arrangement positioned to focus light reflected from the media sheet onto the sensor arrangement, wherein each of the first sensor region and the second sensor region generates image data corresponding to the media sheet from the focused light received from the lens arrangement; and
a control circuitry for selectively configuring at least one of the sensor arrangement and the lens arrangement to generate image data having a desired image resolution based upon a target file size,
wherein the first sensor region generates image data at a first image resolution that is relatively higher than an image resolution of the second sensor region; and
a motion mechanism for moving one of the scan bar and the media sheet relative to the other of the scan bar and the media sheet.
11. The image scanning device of claim 10 wherein the first sensor region is positioned parallel to the second sensor region in a longitudinal direction of the scan bar.
12. The image scanning device of claim 10 wherein a length of the first sensor region is less than a length of the second sensor region in a longitudinal direction of the scan bar.
13. The image scanning device of claim 10 wherein the first sensor region and the second sensor region are positioned in a series arrangement along a longitudinal direction of the scan bar.
14. The image scanning device of claim 10 wherein the lens arrangement comprises a first lens component in optical communication with the first sensor region and a second lens component in optical communication with the second sensor region.
15. The image scanning device of claim 10 wherein the lens arrangement comprises a lens in optical communication with both the first sensor region and the second sensor region.
16. A method for scanning a media sheet by a scan bar in an image scanning device, the method comprising:
receiving light reflected from the media sheet by a lens arrangement of the scan bar;
focusing the received light by the lens arrangement onto a sensor arrangement of the scan bar, the sensor arrangement comprising a first sensor region and a second sensor region, wherein each of the first sensor region and the second sensor region generates image data corresponding to the media sheet from the focused light received from the lens arrangement; and
generating image data corresponding to the media sheet from the focused light received from the lens arrangement for scanning the media sheet, wherein image data generated by the first sensor region is of relatively higher resolution than image data generated by the second sensor region,
wherein the reflected light is focused onto at least one of the first sensor region and the second sensor region based upon a target image file size.
17. The method of claim 16 wherein the first sensor region is positioned parallel to the second sensor region in a longitudinal direction of the scan bar.
18. The method of claim 16 wherein the first sensor region and the second sensor region are positioned in a series arrangement along a longitudinal direction of the scan bar.
19. The method of claim 16 wherein the image data generated by the first sensor region has a resolution that is at least twice a resolution of the image data generated by the second sensor region.
20. The image scanning device of claim 10 wherein the control circuitry selectively configures the image resolution of the first sensor region between the first image resolution and a second image resolution that is substantially the same as the image resolution of the second sensor region based upon the target image file size.