{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8483033","patent":{"patent_number":"US-8483033","title":"Optical information recording/reproducing apparatus and objective optical system for the same","assignee":null,"inventors":[],"filing_date":"2012-07-12T00:00:00.000Z","publication_date":"2013-07-09T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":38,"abstract":"An objective optical system for an optical information recording/reproducing apparatus, at least one surface of the objective optical system being configured to be a phase shift surface having a phase shift structure, wherein: the phase shift surface has a first area contributing to converging first, second and third light beams onto recording surfaces of first, second and third optical discs, respectively; in the first area, the phase shift surface has at least two types of phase shift structures including a first phase shift structure having first steps and a second phase shift structure having second steps; the phase shift surface has a plurality of combinations of annular zones which satisfy a condition:0.95<P1/P2<1.05  (1), andthe phase shift surface satisfies a following condition:−3.00<Δφ1/Δφ2<−0.10  (2)."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical information recording/reproducing apparatus and objective optical system for the same","description":"An objective optical system for an optical information recording/reproducing apparatus, at least one surface of the objective optical system being configured to be a phase shift surface having a phase","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8483033","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-8483033","citation_suggestion":"Patentable. \"Optical information recording/reproducing apparatus and objective optical system for the same\" (US-8483033). https://patentable.app/patents/US-8483033","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8483033","json":"https://patentable.app/api/llm-context/US-8483033","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T21:45:13.594Z"}