{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9823440","patent":{"patent_number":"US-9823440","title":"Imaging lens","assignee":null,"inventors":[],"filing_date":"2016-06-22T00:00:00.000Z","publication_date":"2017-11-21T00:00:00.000Z","cpc_codes":["H04N"],"num_claims":14,"abstract":"The present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having positive (+) refractive power, a second lens having negative (−) refractive power, a third lens having negative (−) refractive power, a fourth lens having negative (−) refractive power, wherein the imaging lens meets a conditional expression of −0.5<f/f3<0 and −0.5<f/f4<0, where f is an entire focus distance of the imaging lens, f3 is a focus distance of the third lens, and f4 is a focus distance of the fourth lens."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Imaging lens","description":"The present invention relates to an imaging lens, the imaging lens including, in an ordered way from an object side, a first lens having positive (+) refractive power, a second lens having negative (−","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9823440","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-9823440","citation_suggestion":"Patentable. \"Imaging lens\" (US-9823440). https://patentable.app/patents/US-9823440","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9823440","json":"https://patentable.app/api/llm-context/US-9823440","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:45:22.988Z"}