{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9631921","patent":{"patent_number":"US-9631921","title":"Intensity modulation at two frequencies for interferometric measuring of distance","assignee":null,"inventors":[],"filing_date":"2015-04-13T00:00:00.000Z","publication_date":"2017-04-25T00:00:00.000Z","cpc_codes":["G01C","G01S","G01S","G01S"],"num_claims":6,"abstract":"A method for measuring a distance includes modulating the light beam at a first frequency, receiving a second beam by the optical detector to produce a first electrical signal having the first frequency and a first phase; modulating the light beam at a second frequency different than the first frequency; receiving the second beam by the optical detector to produce a second electrical signal having the second frequency and a second. After these steps, the retroreflector is moved while modulating the light beam continuously at the second frequency; and a first distance to the retroreflector is determined based at least in part on a the first and second frequencies and phases."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Intensity modulation at two frequencies for interferometric measuring of distance","description":"A method for measuring a distance includes modulating the light beam at a first frequency, receiving a second beam by the optical detector to produce a first electrical signal having the first frequen","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9631921","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-9631921","citation_suggestion":"Patentable. \"Intensity modulation at two frequencies for interferometric measuring of distance\" (US-9631921). https://patentable.app/patents/US-9631921","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9631921","json":"https://patentable.app/api/llm-context/US-9631921","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T15:38:56.003Z"}