{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8509040","patent":{"patent_number":"US-8509040","title":"Optical pickup device and optical disc apparatus","assignee":null,"inventors":[],"filing_date":"2010-04-15T00:00:00.000Z","publication_date":"2013-08-13T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B"],"num_claims":18,"abstract":"An optical pickup device includes a polarization diffraction grating to diverge an optical beam reflected from an optical disc and an optical detector to receive the optical beam diverged by the polarization diffraction grating, a polarization of 0 order diffracted light diffracted through the polarization diffraction grating is substantially perpendicular to that of a +1 order diffracted light diffracted therethrough, and a polarization filter having a plurality of domains is mounted between the polarization diffraction grating and the optical detector."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical pickup device and optical disc apparatus","description":"An optical pickup device includes a polarization diffraction grating to diverge an optical beam reflected from an optical disc and an optical detector to receive the optical beam diverged by the polar","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8509040","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-8509040","citation_suggestion":"Patentable. \"Optical pickup device and optical disc apparatus\" (US-8509040). https://patentable.app/patents/US-8509040","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8509040","json":"https://patentable.app/api/llm-context/US-8509040","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T23:54:57.172Z"}