{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8477577","patent":{"patent_number":"US-8477577","title":"Method for recording on and reading out from optical information recording medium","assignee":null,"inventors":[],"filing_date":"2012-12-13T00:00:00.000Z","publication_date":"2013-07-02T00:00:00.000Z","cpc_codes":["G11B","B82Y","G11B","G11B","G11B"],"num_claims":4,"abstract":"Recording and reading method for optical information recording medium comprising: recording layer having thickness not less than 2λ/n, where λ is wavelength of recording beam and n is refractive index of the recording layer, and configured to undergo a change in the refractive index by irradiation with the recording beam; and adjacent layer adjacent to the recording layer at a side opposite to an incident side, comprises the steps of: recording a recording spot by irradiating with the recording beam, while shifting focal position by offset amount d, which satisfies ω0d3ω0, where ω0 is radius of the recording spot, from interface between recording layer and adjacent layer toward the incident side at a time of recording, whereby the refractive index of recording layer changes at a recording position to record recording spot; and reading out the information by irradiating with reading beam, while bringing it into focus on the interface."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for recording on and reading out from optical information recording medium","description":"Recording and reading method for optical information recording medium comprising: recording layer having thickness not less than 2λ/n, where λ is wavelength of recording beam and n is refractive index","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8477577","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-8477577","citation_suggestion":"Patentable. \"Method for recording on and reading out from optical information recording medium\" (US-8477577). https://patentable.app/patents/US-8477577","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8477577","json":"https://patentable.app/api/llm-context/US-8477577","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T20:57:53.259Z"}