{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8509046","patent":{"patent_number":"US-8509046","title":"Optical information recording method, optical information recording device, optical information reproduction method, optical information reproduction device, and optical information recording medium","assignee":null,"inventors":[],"filing_date":"2010-12-16T00:00:00.000Z","publication_date":"2013-08-13T00:00:00.000Z","cpc_codes":["G11B","G11B"],"num_claims":15,"abstract":"A recording wavelength generator selects control parameters of a recording pulse sequence, based on combinations of mark length, a first space length of a first space immediately before the mark, and a second space length of a second space immediately after the mark. A laser drive circuit records the marks by the recording pulse sequence. The first and second space lengths are classified into m and n types, respectively. An absolute value of a difference between two predetermined control parameters from among (m×n) control parameters selected during recording on a second information layer located on an incidence side of the laser beam with respect to a predetermined first information layer from among N information layers is equal to or greater than an absolute value of a difference between two predetermined control parameters from among the (m×n) control parameters selected during recording on the first information layer."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical information recording method, optical information recording device, optical information reproduction method, optical information reproduction device, and optical information recording medium","description":"A recording wavelength generator selects control parameters of a recording pulse sequence, based on combinations of mark length, a first space length of a first space immediately before the mark, and ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8509046","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-8509046","citation_suggestion":"Patentable. \"Optical information recording method, optical information recording device, optical information reproduction method, optical information reproduction device, and optical information recording medium\" (US-8509046). https://patentable.app/patents/US-8509046","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8509046","json":"https://patentable.app/api/llm-context/US-8509046","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T16:24:15.399Z"}