Method and system for determining optical properties of a lens system
AssigneesChrosziel GmbH, Ib/E Optics Eckerl GmbH
InventorsKlaus Eckerl, Norbert Harendt
Life of this patent
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Abstract
A system for determining at least one optical property of a lens system, comprising: a position sensitive detector 25 for generating image data representing an image projected onto the detector, and a controller 41 configured to receive the image data, to perform a first analysis of the image data in order to determine an identifier of a partial pattern contained in the image represented by the image data, to perform a second analysis of the image data in order to determine at least one property based on the image of the partial pattern, and to generate data representing the at least one optical property of the lens system associated with an image position of the image based on the determined at least one property.
Claims12
A method of determining at least one optical property of a lens system, the method comprising:
- imaging a test pattern into an image plane using the lens system, wherein the test pattern comprises a plurality of adjacent partial patterns and wherein different partial patterns include different identifiers;
- positioning a position sensitive detector in a region of the image plane such that a portion of the test pattern is imaged onto the position sensitive detector, wherein the portion of the test pattern consists of at least one partial pattern but not all of the plural partial patterns;
- recording an image of the portion of the test pattern using the position sensitive detector;
- performing a first analysis of the recorded image and determining the identifier of the at least one partial pattern contained in the image, and a second analysis of the image and determining at least one property based on the image of the at least one partial pattern contained in the image;
- and
- determining the at least one optical property of the lens system for an image position of the lens system based on the determined at least one property and the determined identifier.
A system for determining at least one optical property of a lens system, the system comprising:
- a position sensitive detector for generating image data representing an image projected onto the detector, and
- a controller configured to receive the image data, to perform a first analysis of the image data in order to determine an identifier of a partial pattern contained in the image represented by the image data, to perform a second analysis of the image data in order to determine at least one property based on the image of the partial pattern, and to generate data representing the at least one optical property of the lens system associated with an image position of the image based on the determined at least one property.
Dependencies are inferred from the claim text.