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-reflective indicta reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles relative to the illumination direction, and the plurality of beams provides a substantially continuous ring of reflected light.
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.
24 Citations
36 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-reflective indicta reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles relative to the illumination direction, and the plurality of beams provides a substantially continuous ring of reflected light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. 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 an imaging detector that views light reflected from the Indicta, said light forming an image on the imaging detector, wherein the retro-reflective indicta reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles relative to the illumination direction, wherein the source illuminates and the detector views the surface at substantially the same angle, and wherein the image on the imaging detector comprises a pattern corresponding to the angles at which the light is reflected.
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- 30. A retro-reflective surface having information encoded thereon by having different retro-reflecting areas thereof retro-reflecting with different retro-reflective intensities, to form indicta carrying the information, wherein the retro-reflecting surface reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles to the illumination direction.
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34. 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-reflecting surface reflects the light that Illuminates the indicta as a plurality of beams at a plurality of angles to the illumination direction;
wherein the plurality of beams lie on the surface of a circular or elliptical cone.
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35. 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-reflecting surface reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles to the illumination direction;
wherein the plurality of beams provide a substantially continuous ring of reflected light when illuminated by a beam of light.
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36. 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-reflecting surface reflects the light that illuminates the indicta as a plurality of beams at a plurality of angles to the illumination direction;
wherein the plurality of beams define the surface of two or more circular or elliptical cones.
Specification