Image-forming device sensing mechanism
First Claim
1. A sensing mechanism for an image-forming device comprising:
- a first light source positioned incident to a first side of media;
a second light source positioned incident to a second side of the media opposite of the first side of the media;
a detector positioned incident to the second side of the media to detect first light transmitted through the media as output by the first light source and to detect second light reflected off the media as output by the second light source; and
,a controller to detect at least one characteristic of the media based on a ratio of the first light to the second light.
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Abstract
A sensing mechanism for an image-forming device of one embodiment of the invention is disclosed that includes a first light source, a second light source, a detector, and a controller. The first light source is positioned incident to a first side of media, whereas the second light source is positioned incident to a second side of media opposite of the first side of the media. The detector is positioned incident to the second side of the media to detect first light transmitted through the media as output by the first light source, and to detect second light reflected off the media as output by the second light source. The controller is to detect at least one characteristic of the media based on a ratio of the first light to the second light.
59 Citations
35 Claims
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1. A sensing mechanism for an image-forming device comprising:
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a first light source positioned incident to a first side of media; a second light source positioned incident to a second side of the media opposite of the first side of the media; a detector positioned incident to the second side of the media to detect first light transmitted through the media as output by the first light source and to detect second light reflected off the media as output by the second light source; and
,a controller to detect at least one characteristic of the media based on a ratio of the first light to the second light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An image-forming device comprising:
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an image-forming mechanism to form an image on media; a media-moving mechanism to move the media though the image-forming device; and
,a sensing mechanism to detect at least one characteristic of the media as the media is moved through the image-forming device based on a ratio of light transmitted though the media and light reflected off the media. - View Dependent Claims (16, 17, 18, 19)
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20. An image-forming device comprising:
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means for forming an image on media; means for moving the media through the image-forming device; and
,means for detecting at least one characteristic of the media as the media is moved through the image-forming device based on first light transmitted through the media and second light reflected off the media independent of distances at which the first light and the second light are detected. - View Dependent Claims (21, 22)
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23. A method comprising:
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turning on and off in succession a first light source and a second light source positioned incident to opposite sides of media; detecting first light transmitted through the media by the first light source and second light reflected off the media by the second light source; and
,determining at least one characteristic of the media based on the first light and the second light detected. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification