{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9739644","patent":{"patent_number":"US-9739644","title":"Interferometric rotary encoder","assignee":null,"inventors":[],"filing_date":"2015-05-28T00:00:00.000Z","publication_date":"2017-08-22T00:00:00.000Z","cpc_codes":["G01D","G01D"],"num_claims":22,"abstract":"A precision optical encoder that utilizes interferometric measurements of displacement to provide angle measurements using a laser which is injection locked to a reference laser having a secondary optical frequency which has been verified with respect to a primary optical frequency standard. The encoder shape encodes distance to rotation angle. By utilizing a laser source locked to a reference laser having a standardized (i.e., verified) secondary optical frequency for fundamental measurements of the encoder surface and real-time interferometer measurements, the encoder reports rotation angle measurements that are directly traceable to a primary optical frequency standard through the injected secondary optical frequency."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Interferometric rotary encoder","description":"A precision optical encoder that utilizes interferometric measurements of displacement to provide angle measurements using a laser which is injection locked to a reference laser having a secondary opt","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9739644","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-9739644","citation_suggestion":"Patentable. \"Interferometric rotary encoder\" (US-9739644). https://patentable.app/patents/US-9739644","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9739644","json":"https://patentable.app/api/llm-context/US-9739644","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:15:38.324Z"}