{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11249321","patent":{"patent_number":"US-11249321","title":"Diffractive optical element, optical system having the same, and imaging apparatus","assignee":null,"inventors":[],"filing_date":"2017-10-11T00:00:00.000Z","publication_date":"2022-02-15T00:00:00.000Z","cpc_codes":["H04N"],"num_claims":14,"abstract":"A diffractive optical element includes a first lens having a convex surface, a second lens having a concave surface, disposed in such a manner that the concave surface of the second lens faces the convex surface of the first lens, and a diffraction grating section formed between the first and the second lenses and having positive optical power through diffraction. The diffraction grating section includes a first diffraction grating and a second diffraction grating disposed in this order from a side closer to the first lens; the second diffraction grating has a refractive index larger than that of the first diffraction grating, and an inner diameter of a grating wall surface of the diffraction grating section decreases as approaching to the second lens from the first lens."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Diffractive optical element, optical system having the same, and imaging apparatus","description":"A diffractive optical element includes a first lens having a convex surface, a second lens having a concave surface, disposed in such a manner that the concave surface of the second lens faces the con","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11249321","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-11249321","citation_suggestion":"Patentable. \"Diffractive optical element, optical system having the same, and imaging apparatus\" (US-11249321). https://patentable.app/patents/US-11249321","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11249321","json":"https://patentable.app/api/llm-context/US-11249321","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T09:39:55.257Z"}