{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8493831","patent":{"patent_number":"US-8493831","title":"Compatible optical pickup and optical recording and/or reproducing apparatus employing the same","assignee":null,"inventors":[],"filing_date":"2004-07-23T00:00:00.000Z","publication_date":"2013-07-23T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B"],"num_claims":26,"abstract":"A compatible optical pickup including an optical unit and a focusing unit. The optical unit emits a short wavelength light for high-density recording media and a long wavelength light for low-density recording media, directs the short and long wavelength light to a recording medium, receives lights reflected by the recording medium, and detects an information reproduction signal and/or an error signal from the received lights. The focusing unit focuses light received from the optical unit to form a light spot on a recording surface of the recording medium, diffracts the short wavelength light into a zero order light and the long wavelength light into a second order light to be used as effective light for recording and/or reproduction. Thus, a high-density recording medium and a low-density recording medium having different thicknesses can be compatibly used."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Compatible optical pickup and optical recording and/or reproducing apparatus employing the same","description":"A compatible optical pickup including an optical unit and a focusing unit. The optical unit emits a short wavelength light for high-density recording media and a long wavelength light for low-density ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8493831","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-8493831","citation_suggestion":"Patentable. \"Compatible optical pickup and optical recording and/or reproducing apparatus employing the same\" (US-8493831). https://patentable.app/patents/US-8493831","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8493831","json":"https://patentable.app/api/llm-context/US-8493831","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:05:22.604Z"}