Optical image capture system for reading targets at oblique angles
First Claim
1. A coded target reader that captures reflected light from a coded target and converts the reflected light into an image, the coded target reader comprising:
- an optical system that receives reflected light from a coded target and produces an optical image;
a photo detector that receives the optical image from the optical system and converts the optical image into a captured coded image; and
a configuration of the optical system and the photo detector compensating for an oblique reading angle of the coded target reader.
3 Assignments
0 Petitions
Accused Products
Abstract
A portable hand-held reader unit for reading two-dimensional information and generating an image therefrom wherein an optical axis of the reader is oriented obliquely to the surface containing the coded information. The reader includes a sensing system designed such that the rectilinear dimension of the generated image corresponding to an axis of the coded information undergoing the most distortion from oblique reading is magnified, by the lens system or the resolution configuration of the image sensor, to a greater extent than that of the rectilinear dimension undergoing the least distortion from oblique reading. Alternatively, the sensor is oriented relative to the optical axis such that the received image does not exhibit the distortion which may result from oblique reading. The coded information may contain height-to-width ratio of the coded information such that the generated image can be automatically corrected for distortion from oblique reading. Ranging marker beams may be used in conjunction with the obliqueness correcting embodiments to align the reader with the coded information.
-
Citations
19 Claims
-
1. A coded target reader that captures reflected light from a coded target and converts the reflected light into an image, the coded target reader comprising:
-
an optical system that receives reflected light from a coded target and produces an optical image; a photo detector that receives the optical image from the optical system and converts the optical image into a captured coded image; and a configuration of the optical system and the photo detector compensating for an oblique reading angle of the coded target reader. - View Dependent Claims (2, 3, 4)
-
-
5. A coded target reader that captures reflected light from a coded target and converts the reflected light into a captured coded image, the coded target reader comprising:
-
an optical system that receives reflected light from a coded target and produces an optical image; an optical detector that receives the optical image from the optical system and converts the optical image into a captured coded image; and
the orientation of the optical system and optical detector compensating for the oblique reading angle of the coded target reader. - View Dependent Claims (6, 7)
-
-
8. A coded target reader that captures reflected light from a coded target and converts the reflected light into an image, the coded target reader comprising:
-
an optical system that receives reflected light from a coded target and produces an optical image; a photo detector that receives the optical image from the optical system and converts the optical image into a captured coded image; and image adjustment circuitry that adjusts operation of the optical system and the photo detector to compensate for an oblique reading angle of the coded target reader. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. A coded target reader that captures reflected light from a coded target and converts the reflected light into a captured coded image, the coded target reader comprising:
-
an optical system that receives reflected light from a coded target and produces an optical image; an optical detector that receives the optical image from the optical system and converts the optical image into a captured coded image; image adjustment circuitry that receives the captured coded image, adjusts the captured coded image to compensate for oblique viewing angles of the coded target reader to produce a corrected coded image and directs the corrected coded image to storage. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification