Measurement of the positions of centres of curvature of optical surfaces of a single or multi-lens optical system
First Claim
1. A method for measuring the positions of centres of curvature of optical surfaces of a single- or multi-lens optical system, comprising the following steps:
- a) providing an imaging lens system which images at least one object plane into a first image plane and a second image plane which is different from the first image plane, whereinthe first image plane is produced by a first ancillary lens system having a first focal length and defining a first beam path,the second image plane is produced by a second ancillary lens system having a second focal length that is different from the first focal length and defining a second beam path that is different from the first beam path,b) simultaneously or sequentially imaging an object arranged in the object plane at the first image plane and at the second image plane by means of measuring light which strikes the optical system from one side;
c) detecting reflections of the measuring light at optical surfaces of the optical system by means of a spatially resolving light sensor;
d) calculating the actual positions of the first centre of curvature and of the second centre of curvature on the basis of the reflections detected in step c).
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Abstract
In a method for measuring the positions of centers of curvature of optical surfaces of a single- or multi-lens optical system, an imaging lens system images an object plane into a first and a second image plane. The first image plane is produced by a first ancillary lens system having a first focal length and defining a first beam path, while the second image plane is produced by a second ancillary lens system having a second focal length that is different from the first focal length and defining a second beam path that is different from the first beam path. An object arranged in the object plane is then imaged simultaneously or sequentially at the first and the second image plane by means of measuring light. Reflections of the measuring light at optical surfaces of the optical system are detected by means of a spatially resolving light sensor. The actual positions of the first and the second center of curvature are calculated from the detected reflexes.
18 Citations
20 Claims
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1. A method for measuring the positions of centres of curvature of optical surfaces of a single- or multi-lens optical system, comprising the following steps:
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a) providing an imaging lens system which images at least one object plane into a first image plane and a second image plane which is different from the first image plane, wherein the first image plane is produced by a first ancillary lens system having a first focal length and defining a first beam path, the second image plane is produced by a second ancillary lens system having a second focal length that is different from the first focal length and defining a second beam path that is different from the first beam path, b) simultaneously or sequentially imaging an object arranged in the object plane at the first image plane and at the second image plane by means of measuring light which strikes the optical system from one side; c) detecting reflections of the measuring light at optical surfaces of the optical system by means of a spatially resolving light sensor; d) calculating the actual positions of the first centre of curvature and of the second centre of curvature on the basis of the reflections detected in step c). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14)
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10. A device for measuring the positions of centres of curvature of optical surfaces of a single- or multi-lens optical system, comprising:
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a) an imaging lens system which is configured to image at least one object plane into a first image plane and simultaneously into a second image plane which is different from the first plane, wherein the imaging lens system comprises a first ancillary lens system that has a first focal length, produces the first image plane and defines a first beam path, a second ancillary lens system that has a second focal length that is different from the first focal length, produces the second image plane and defines a second beam path that is different from the first beam path, b) a spatially resolving light sensor which is configured to detect reflections of measuring light at optical surfaces of the optical system; c) an evaluation device which is configured to calculate the actual position of a first centre of curvature and of a second centre of curvature on the basis of the reflections detected by the light sensor, after an object arranged in the object plane has simultaneously or sequentially been imaged at the first image plane and at the second image plane by means of measuring light which strikes the optical system from one side. - View Dependent Claims (11, 12, 13, 15, 16, 17)
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18. A device for measuring the positions of centres of curvature of optical surfaces of a single- or multi-lens optical system, comprising:
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a) an imaging lens system which is configured to image, with the help of measuring light, at least one object into a first image plane and into a second image plane which is different from the first image plane, wherein the imaging lens system comprises a first lens and a second lens, wherein measuring light that is focused in the first image plane passes only through the first lens, but not through the second lens, and wherein measuring light that is focused in the second image plane passes only through the second lens, but not through the first lens; b) a light sensor which is configured to detect reflections of measuring light at optical surfaces of the optical system; c) an evaluation device which is configured to calculate a position of a first centre of curvature and of a second centre of curvature on the basis of the reflections detected by the light sensor. - View Dependent Claims (19, 20)
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Specification