{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8520131","patent":{"patent_number":"US-8520131","title":"Photometric device, imaging device, and camera","assignee":null,"inventors":[],"filing_date":"2010-06-18T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["H04N","H04N","H04N","H04N","H04N"],"num_claims":3,"abstract":"A photometric device includes: an imaging unit that captures an image formed by an optical system, with a marker capable of switching between display and non-display disposed in a light path of the optical system; and a correction unit that, based upon a difference between a first image captured by the imaging unit in a state where the marker is displayed and a second image captured by the imaging unit in a state where the marker is not displayed, performs a correction of a third image that is different from the first image and the second image."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Photometric device, imaging device, and camera","description":"A photometric device includes: an imaging unit that captures an image formed by an optical system, with a marker capable of switching between display and non-display disposed in a light path of the op","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8520131","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-8520131","citation_suggestion":"Patentable. \"Photometric device, imaging device, and camera\" (US-8520131). https://patentable.app/patents/US-8520131","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8520131","json":"https://patentable.app/api/llm-context/US-8520131","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T19:34:00.180Z"}