{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9816917","patent":{"patent_number":"US-9816917","title":"Vitreous silica crucible and distortion-measuring apparatus for the same","assignee":null,"inventors":[],"filing_date":"2014-12-25T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["G01N","H04N","G01N","G01N","G01N"],"num_claims":18,"abstract":"In an embodiment, a distortion-measuring apparatus for measuring a distortion distribution of an entire vitreous silica crucible in a non-destructive way includes: a light source 11; a first polarizer 12 and a first quarter-wave plate 13 disposed between the light source 11 and an outer surface of a vitreous silica crucible wall; a camera 14 disposed inside of a vitreous silica crucible 1; a camera control mechanism 15 configured to control a photographing direction of the camera 14; a second polarizer 16 and a second quarter-wave plate 17 disposed between the camera 14 and an inner surface of the vitreous silica crucible wall. An optical axis of the second quarter-wave plate 17 inclines 90 degrees with respect to the first quarter-wave plate 13. "},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Vitreous silica crucible and distortion-measuring apparatus for the same","description":"In an embodiment, a distortion-measuring apparatus for measuring a distortion distribution of an entire vitreous silica crucible in a non-destructive way includes: a light source 11; a first polarizer","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9816917","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-9816917","citation_suggestion":"Patentable. \"Vitreous silica crucible and distortion-measuring apparatus for the same\" (US-9816917). https://patentable.app/patents/US-9816917","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9816917","json":"https://patentable.app/api/llm-context/US-9816917","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:19:15.350Z"}