Material testing of optical test pieces
AssigneeCarl Zeiss Jena GmbH
InventorsLars Stoppe, Niklas Mevenkamp, Alexander Freytag
Life of this patent
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Abstract
The invention relates to techniques for material testing of optical test pieces, for example of lenses. Angle-variable illumination, using a suitable illumination module, and/or angle-variable detection are carried out in order to create a digital contrast. The digital contrast can be, for example, a digital phase contrast. A defect detection algorithm for automated material testing based on a result image with digital contrast can be used. For example, an artificial neural network can be used.
Claims21
A method for material testing of an optical test object using an optical imaging system, wherein the method comprises:
- for each of at least one pose of the test object in relation to the optical imaging system:
- respectively actuating the optical imaging system to capture at least two images of the test object by means of at least one of angle-variable illumination and angle-variable detection,
- for each of the at least one pose:
- respectively processing the corresponding at least two images to generate a result image with a digital contrast, and
- on the basis of the at least one result image which was generated on the basis of the at least two images for the at least one pose:
- carrying out material testing of the test object.
A computing unit which is configured to:
- actuate an optical imaging system in order to capture, by means of at least one of angle-variable illumination and angle-variable detection, at least two respective images of a test object for each of the at least one pose of said optical test object in relation to the imaging system,
- for each of the at least one pose:
- respectively process the corresponding at least two images to generate a result image with a digital contrast, and
- on the basis of the at least one result image which was generated on the basis of the at least two images for the at least one pose:
- carry out material testing of the test object.
Dependencies are inferred from the claim text.