{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9638992","patent":{"patent_number":"US-9638992","title":"Illumination optical system and image projection apparatus","assignee":null,"inventors":[],"filing_date":"2015-05-08T00:00:00.000Z","publication_date":"2017-05-02T00:00:00.000Z","cpc_codes":["H04N","H04N"],"num_claims":8,"abstract":"The illumination optical system includes a first optical system configured to shape a light flux from a light source such that a light flux cross-sectional shape of the light flux becomes close to a rectangular shape of an illumination surface, a second optical system having an optical axis tilted with respect to a normal to the illumination surface and configured to introduce the light flux from the first optical system to the illumination surface, and a light-transmissive element having an entrance surface and an exit surface respectively forming mutually different angles with respect to the optical axis of the second optical system in a plane including the optical axis of the second optical system and the normal to the illumination surface. The light-transmissive element is disposed between the first optical system and the illumination surface."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Illumination optical system and image projection apparatus","description":"The illumination optical system includes a first optical system configured to shape a light flux from a light source such that a light flux cross-sectional shape of the light flux becomes close to a r","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9638992","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-9638992","citation_suggestion":"Patentable. \"Illumination optical system and image projection apparatus\" (US-9638992). https://patentable.app/patents/US-9638992","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9638992","json":"https://patentable.app/api/llm-context/US-9638992","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:00:35.194Z"}