Optical device with a measurement scale
First Claim
1. An optical device for determination of a distance to an object viewed through the optical device, the object having an at least approximately known size, said optical device comprising:
- a visible measurement scale including a reference marking and a plurality of measurement markings each representing a numerical value that is;
correlated with the measurement scale,inversely proportional to a distance between the reference marking and a respective measurement marking, andpre-calculated to incorporate a scaling factor such that no further calculation is needed to determine a distance to the object other than multiplying the size of the object by the numeric value represented by one of the measurement markings selected by placing the reference marking on one reference point of the object viewed through the optical device and determining that the one of the measurement markings coincides with another reference point of the object,wherein the measurement markings are not uniformly spaced, andat least some of the numerical values are optically rendered in the measurement scale.
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Accused Products
Abstract
An optical device with at least one measurement scale for the determination of the distance to an object with an at least approximately known size observed by the measurement scale. In order to make possible a quick, object size-independent readability of measurement values and a simpler calculation of the distance to an object from the read-off measurement values, the measurement scale includes a reference marking and at least one additional measurement marking with a numerical value that is correlated with it and that is inversely proportional to the distance of the reference marking from the pertinent measurement marking. The distance to the object observed by the measurement scale is produced by a multiplication of the size of the object with a measurement value read off from the measurement scale.
42 Citations
20 Claims
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1. An optical device for determination of a distance to an object viewed through the optical device, the object having an at least approximately known size, said optical device comprising:
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a visible measurement scale including a reference marking and a plurality of measurement markings each representing a numerical value that is; correlated with the measurement scale, inversely proportional to a distance between the reference marking and a respective measurement marking, and pre-calculated to incorporate a scaling factor such that no further calculation is needed to determine a distance to the object other than multiplying the size of the object by the numeric value represented by one of the measurement markings selected by placing the reference marking on one reference point of the object viewed through the optical device and determining that the one of the measurement markings coincides with another reference point of the object, wherein the measurement markings are not uniformly spaced, and at least some of the numerical values are optically rendered in the measurement scale. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for determination of a distance to an object with having an at least approximately known size, said method comprising:
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observing two reference points of the object through an optical device that includes a visible measurement scale including a reference marking and a plurality of measurement markings each representing a numerical value that is; correlated with the measurement scale, inversely proportional to a distance between the reference marking and a respective measurement marking, and pre-calculated to incorporate a scaling factor such that no further calculation is needed to determine a distance to the object other than multiplying the at least approximately known size of the object by the numeric value represented by one of the measurement markings, wherein the measurement markings are not uniformly spaced, and at least some of the numerical values are optically rendered in the measurement scale; placing the reference marking on the first reference point of the object; determining the measurement marking that coincides with the second reference point of the object; and calculating the distance to the object by multiplying the at least approximately known size of the object with the numerical value represented by the measurement marking that coincides with the second reference point of the object without a requirement of performing a division. - View Dependent Claims (18, 19, 20)
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Specification