{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8498187","patent":{"patent_number":"US-8498187","title":"Optical disc apparatus and optical disc discriminating method","assignee":null,"inventors":[],"filing_date":"2011-05-26T00:00:00.000Z","publication_date":"2013-07-30T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":12,"abstract":"In an optical disk having multiple layers for which a correction of spherical aberration is required, a spherical aberration correcting element is set to a predetermined spherical aberration correction amount; a laser light source is turned ON; an objective lens is swept; when it is discriminated that the optical disk has two or more layers, or has more than two information recording planes, the spherical aberration correction amount is changed into a spherical aberration correction amount suitable for information recording planes of three, or more layers; and the objective lens is again swept so as to discriminate a total layer number thereof."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical disc apparatus and optical disc discriminating method","description":"In an optical disk having multiple layers for which a correction of spherical aberration is required, a spherical aberration correcting element is set to a predetermined spherical aberration correctio","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8498187","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-8498187","citation_suggestion":"Patentable. \"Optical disc apparatus and optical disc discriminating method\" (US-8498187). https://patentable.app/patents/US-8498187","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8498187","json":"https://patentable.app/api/llm-context/US-8498187","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:08:55.821Z"}