{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8531926","patent":{"patent_number":"US-8531926","title":"Optical system for optical pickup","assignee":null,"inventors":[],"filing_date":"2012-03-05T00:00:00.000Z","publication_date":"2013-09-10T00:00:00.000Z","cpc_codes":["G11B","G11B","G11B","G11B","G11B","G11B"],"num_claims":6,"abstract":"An optical system for optical pickup includes a magnification conversion optical element moving along an optical axis direction in accordance with each of optical recording medium recording surfaces, and an objective lens element converging a light beam incident through the magnification conversion optical element, to form a spot on a corresponding one of the recording surfaces, and satisfies the following formula: 4.0×10−4<Mn/(tn−tc)×f<6.0×10−4. Here tc is the thickness [μm] of a recording-medium base material at which a third-order spherical aberration occurring when a parallel light beam is incident on the objective lens element is the minimum, f is the focal length [mm] of the objective lens element, and Mn is the imaging magnification of the objective lens element when a spot is formed through a thickness tn [μm]of the base plate."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Optical system for optical pickup","description":"An optical system for optical pickup includes a magnification conversion optical element moving along an optical axis direction in accordance with each of optical recording medium recording surfaces, ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8531926","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-8531926","citation_suggestion":"Patentable. \"Optical system for optical pickup\" (US-8531926). https://patentable.app/patents/US-8531926","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8531926","json":"https://patentable.app/api/llm-context/US-8531926","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T05:38:23.407Z"}