BAR CODE READER, OPTICAL MOUSE, AND BAR CODE READING METHOD
First Claim
1. A barcode reader comprising:
- a light emitting unit; and
a light receiving unit,wherein said light receiving unit is arranged to overlap with said light emitting unit in a longitudinal direction of said barcode reader and on a side, to which said light emitting unit emits light, andwherein said light emitting unit and said light receiving unit are arranged in a linear fashion, or, on a substantial same axis.
1 Assignment
0 Petitions
Accused Products
Abstract
A photo-transistor 31 is arranged to overlap with a light emitting diode 33 in a longitudinal direction of a barcode reader 7 and on a side, to which the light emitting diode 33 emits light. In this case, the photo-transistor 31 and the light emitting diode 33 are arranged on the same optical axis. As the result, since depth of focus and depth of field overlap with each other in the optical axial direction, it is believed that resolution in reading a bar-code is secured in wide range in the optical axis direction. The depth of focus includes an image point when the light emitting diode 33 is positioned at an object point. The depth of field includes an object point when the photo-transistor 31 is positioned at an image point.
28 Citations
36 Claims
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1. A barcode reader comprising:
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a light emitting unit; and a light receiving unit, wherein said light receiving unit is arranged to overlap with said light emitting unit in a longitudinal direction of said barcode reader and on a side, to which said light emitting unit emits light, and wherein said light emitting unit and said light receiving unit are arranged in a linear fashion, or, on a substantial same axis. - View Dependent Claims (8, 9, 10)
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2. A barcode reader comprising:
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a light emitting unit; and a light receiving unit, wherein said light receiving unit is arranged between an outgoing aperture from which light of said light emitting unit is emitted outside and said light emitting unit, and wherein said light emitting unit and said light receiving unit are arranged in a linear fashion, or, on a substantial same axis. - View Dependent Claims (3, 4, 5, 29, 30, 31, 32, 33, 34, 35, 36)
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6-7. -7. (canceled)
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11-28. -28. (canceled)
Specification