{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-11290657","patent":{"patent_number":"US-11290657","title":"Finder apparatus, imaging apparatus, and method of controlling finder apparatus","assignee":null,"inventors":[],"filing_date":"2020-04-01T00:00:00.000Z","publication_date":"2022-03-29T00:00:00.000Z","cpc_codes":["H04N","G02F","H04N","H04N","H04N","H04N","H04N","G02F","H04N","H04N"],"num_claims":19,"abstract":"A finder apparatus according to a first aspect of the present invention includes an optical finder for observing an optical image of a subject using an eyepiece portion, a display device that displays information, a half mirror that is arranged on an optical path of the optical finder, an electronically variable ND filter that is inserted on a subject side from the half mirror on the optical path of the optical finder and is divided into a plurality of regions, a brightness information acquisition unit that acquires brightness information of external light, a brightness measurement unit that measures brightness of incident light for each of the plurality of regions, and a transmittance calculation unit that calculates transmittance of the electronically variable ND filter for each of the plurality of regions based on the measured brightness and the acquired brightness information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Finder apparatus, imaging apparatus, and method of controlling finder apparatus","description":"A finder apparatus according to a first aspect of the present invention includes an optical finder for observing an optical image of a subject using an eyepiece portion, a display device that displays","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-11290657","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-11290657","citation_suggestion":"Patentable. \"Finder apparatus, imaging apparatus, and method of controlling finder apparatus\" (US-11290657). https://patentable.app/patents/US-11290657","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-11290657","json":"https://patentable.app/api/llm-context/US-11290657","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T07:28:17.703Z"}