{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9752901","patent":{"patent_number":"US-9752901","title":"Scale and optical encoder","assignee":null,"inventors":[],"filing_date":"2015-05-26T00:00:00.000Z","publication_date":"2017-09-05T00:00:00.000Z","cpc_codes":["G01D","G01D","G01D"],"num_claims":9,"abstract":"A scale and an optical encoder capable of maintaining an accuracy of a reference position irrespective of an error in attaching a detection head are provided. The scale according to the present invention is a scale including main-signal scale gratings having grating patterns of a predetermined pitch, and a reference-signal pattern, in which the main-signal scale gratings are arranged in parallel in a direction perpendicular to a length measurement axis of the main-signal scale gratings and are different from each other in phase by ½, and the reference-signal pattern is formed on the length measurement axis of the main-signal scale gratings. The optical encoder according to the present invention includes a light source, main-signal light source gratings, reference-signal light source gratings, main-signal receiver gratings, and a reference-signal receiver element."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Scale and optical encoder","description":"A scale and an optical encoder capable of maintaining an accuracy of a reference position irrespective of an error in attaching a detection head are provided. The scale according to the present invent","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9752901","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-9752901","citation_suggestion":"Patentable. \"Scale and optical encoder\" (US-9752901). https://patentable.app/patents/US-9752901","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9752901","json":"https://patentable.app/api/llm-context/US-9752901","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:59:07.419Z"}