Electro-optic reader for retro-reflective bar codes
First Claim
Patent Images
1. A system for identification comprising:
- a surface comprising retro-reflective indicta;
a source of light that illuminates the indicta along an illumination direction; and
a detector that views light reflected from the indicta, wherein the retro-reflector reflects the light that illuminates it as a plurality of beams at a plurality of angles relative to the illumination direction.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for identification comprising: a surface (14) comprising retro-reflective indicta; a source of light that illuminates the indicta (18) along an illumination direction; and a detector (20, 21) that views light reflected from the indicta, wherein the retro-reflector reflects the light that illuminates it as a plurality of beams at a plurality of angles relative to the illumination direction.
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Citations
83 Claims
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1. A system for identification comprising:
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a surface comprising retro-reflective indicta;
a source of light that illuminates the indicta along an illumination direction; and
a detector that views light reflected from the indicta, wherein the retro-reflector reflects the light that illuminates it as a plurality of beams at a plurality of angles relative to the illumination direction. - View Dependent Claims (3, 5, 6, 7, 9, 15, 17, 18, 19, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 34, 36, 37, 79, 80, 81, 82, 83)
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2. (Canceled)
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4. (Canceled)
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8. (Canceled)
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10-14. -14. (Canceled)
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16. (Canceled)
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20. (Canceled)
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23. (Canceled)
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33. (Canceled)
- 35. (Canceled)
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39-43. -43. (Canceled)
- 44. A retro-reflective surface having information encoded thereon by having different areas thereof retro-reflecting with different retro-reflective intensities, to form indicta carrying the information, wherein the retro-reflector reflects the light that illuminates it as a plurality of beams at a plurality of angles to the illumination direction.
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46. (Canceled)
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48-52. -52. (Canceled)
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56-61. -61. (Canceled)
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63-70. -70. (Canceled)
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71. A method of reading a bar code comprising:
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forming an image of a bar code, having at least 8 symbols with a camera from a distance of more than 10 meters; and
determining the symbols represented by the bar code.
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72. (Canceled)
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73. A method of reading a bar code comprising:
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forming an image of a bar code with a camera from a distance of more than 10 meters; and
determining the symbols represented by the bar code, wherein the bar code is comprised in a retro-reflected image and including illuminating the bar code with light from a controllable light source; and
wherein the retro-reflected image is reflected with a offset angle relative to the angle of incidence of the illumination from the light source. - View Dependent Claims (74, 75, 76, 77, 78)
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Specification