{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8477574","patent":{"patent_number":"US-8477574","title":"Optical disk device","assignee":null,"inventors":[],"filing_date":"2012-05-29T00:00:00.000Z","publication_date":"2013-07-02T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":4,"abstract":"An optical disk device is configured such that when an optical disk including three or more recording layers on one side is inserted into the optical disk device, a movable lens position adjustment device performs adjustment using as an index a tracking error signal provided with a limit to an amount of movement of a movable lens for spherical aberration correction at start-up of the optical disk device and sets an upper limit to the number of retries of the adjustment at the recording layer farthest away from the side on which the laser beam is incident to 1 or more."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical disk device","description":"An optical disk device is configured such that when an optical disk including three or more recording layers on one side is inserted into the optical disk device, a movable lens position adjustment de","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8477574","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-8477574","citation_suggestion":"Patentable. \"Optical disk device\" (US-8477574). https://patentable.app/patents/US-8477574","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8477574","json":"https://patentable.app/api/llm-context/US-8477574","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T15:07:49.703Z"}