Method and device for optically determining the position of an object
First Claim
1. A method of optically determining the position of an object in a particular area of a substantially plane surface, including the following steps:
- disposing in the vicinity of said particular area at least one directional single-point emitter associated with at least two directional single-point light receivers covering the particular area, each light emitter and receiver having an axis substantially parallel to the particular area on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the receivers intersect the axis of the emitter at different points;
energizing the light emitter;
determining the position of the object on the axis of the emitter as a function of a comparison of the light signals reflected and diffused by the object toward each of the two light receivers.
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Accused Products
Abstract
The invention relates to a method and a device for optically determining the position of an object in a particular area of a substantially plane surface. According to the invention at least one directional single-point emitter associated with at least two directional single-point light receivers covering the particular area are disposed near said particular area, each light emitter and receiver having an axis substantially parallel to the particular area and on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the receivers intersect the axis of the emitter at different points. The light emitter is energized and the position of the object on the axis of the emitter is determined as a function of a comparison of the light signals reflected and diffused by the object toward each of the two light receivers.
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Citations
29 Claims
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1. A method of optically determining the position of an object in a particular area of a substantially plane surface, including the following steps:
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disposing in the vicinity of said particular area at least one directional single-point emitter associated with at least two directional single-point light receivers covering the particular area, each light emitter and receiver having an axis substantially parallel to the particular area on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the receivers intersect the axis of the emitter at different points; energizing the light emitter; determining the position of the object on the axis of the emitter as a function of a comparison of the light signals reflected and diffused by the object toward each of the two light receivers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of optically determining the position of an object in a particular areas of a substantially plane surface, including the following steps:
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disposing in the vicinity of said particular area at least two directional single-point emitters associated with one directional single-point light receiver covering the particular area, each light emitter and receiver having an axis substantially parallel to the particular area in which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the emitters intersect the axis of the receiver at different points; energizing the light emitters successively; determining the position of the object on the axis of the receiver as a function of a comparison of the light signals reflected and diffused by the object toward the light receiver on the successive energizing of the emitters. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An optical device for determining the position of an object in a particular area of a substantially plane surface, including:
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in the vicinity of said particular area, at least one directional single-point emitter associated with at least two directional single-point light receivers covering the particular area, each light emitter and receiver having an axis substantially parallel to the particular area on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the receivers intersect the axis of the emitter at different points; control means for energizing the light emitter; processing means for determining the position of the object on the axis of the emitter as a function of a comparison of the light signals reflected and diffused by the object toward each of the two light receivers. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A device for optically determining the position of an object in a particular area of a substantially plane surface, including:
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in the vicinity of said particular area, at least two directional single-point emitters associated with at least one directional single-point light receiver covering the particular area, each light emitter and receiver having an axis substantially parallel to the particular area on which maximum emission, respectively maximum sensing angle, is observed, so that the axes of the emitters intersect the axis of the receiver at different points; control means for energizing the light emitters successively; processing means for determining the position of the object on the axis of the receiver as a function of a comparison of the light signals reflected and diffused by the object toward the light receiver on the successive energizing of light emitters. - View Dependent Claims (29)
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Specification