{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11300527","patent":{"patent_number":"US-11300527","title":"Method for detecting lens cleanliness using spectral differential flat field correction","assignee":null,"inventors":[],"filing_date":"2021-09-24T00:00:00.000Z","publication_date":"2022-04-12T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G06T","G06T","H04N","G01N","G01N","G01N","G06T","G06T"],"num_claims":4,"abstract":"A method for detecting lens cleanliness of a lens disposed in a flat-field optical path, the flat-field optical path including a light source, the lens, a camera, the light source is a narrow-band multispectral uniform surface light source, the camera's light-sensitive surface is disposed perpendicular to an optical axis of the lens and in the light position of the lens, the method including collecting the bright-field image data and dark-field image data in a plurality of spectra through the lens; for each pixel, performing a spectral differential flat-field correction operation to yield a plurality of spectral differentials; and displaying the spectral differentials in the form of a plurality of images to show a uniformity of each of the plurality of images, wherein a non-uniform area on each of the plurality of images is determined to have been caused by an impurity of the lens."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for detecting lens cleanliness using spectral differential flat field correction","description":"A method for detecting lens cleanliness of a lens disposed in a flat-field optical path, the flat-field optical path including a light source, the lens, a camera, the light source is a narrow-band mul","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11300527","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-11300527","citation_suggestion":"Patentable. \"Method for detecting lens cleanliness using spectral differential flat field correction\" (US-11300527). https://patentable.app/patents/US-11300527","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11300527","json":"https://patentable.app/api/llm-context/US-11300527","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T12:25:35.885Z"}