{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8493572","patent":{"patent_number":"US-8493572","title":"Optical encoder having contamination and defect resistant signal processing","assignee":null,"inventors":[],"filing_date":"2010-05-05T00:00:00.000Z","publication_date":"2013-07-23T00:00:00.000Z","cpc_codes":["G01D","G01D"],"num_claims":20,"abstract":"An encoder configuration comprises an illumination portion, a scale comprising a scale track, and a signal processing electronics. The signal processing electronics may include a detector comprising a first set of three detector sub-portions that provide a first set of signals comprising three respective sub-portion signal subsets that have nominally the same signal characteristics when the scale track is not contaminated or defective. The processing electronics analyze the first set of signals and identify a least-similar sub-portion signal subset that has a corresponding signal characteristic value that is least similar to comparable signal characteristic values associated with more-similar sub-portion signal subsets of the first set of signals. Position measurements are based on valid signals including a plurality of the more-similar sub-portion signal subsets and not including the least-similar sub-portion signal subset if it is significantly different. Accurate measurement may be provided despite significant scale contamination or defects."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical encoder having contamination and defect resistant signal processing","description":"An encoder configuration comprises an illumination portion, a scale comprising a scale track, and a signal processing electronics. The signal processing electronics may include a detector comprising a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8493572","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-8493572","citation_suggestion":"Patentable. \"Optical encoder having contamination and defect resistant signal processing\" (US-8493572). https://patentable.app/patents/US-8493572","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8493572","json":"https://patentable.app/api/llm-context/US-8493572","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T12:47:38.788Z"}