{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9739700","patent":{"patent_number":"US-9739700","title":"Method for detecting nano-particles using a lens imaging system with a field stop","assignee":null,"inventors":[],"filing_date":"2013-09-03T00:00:00.000Z","publication_date":"2017-08-22T00:00:00.000Z","cpc_codes":["G01N","G01N","G01N","G01N","G01N","G01N","G01N","G01N"],"num_claims":14,"abstract":"Disclosed is a method for detecting nano-particles, comprising the steps of (1) compressing a sample liquid to be tested into a sample liquid flow by hydrodynamic focusing using a sheath fluid; (2) irradiating a measuring light to the sample liquid flow, wherein a single nano-particle in the sample liquid flow is irradiated by the measuring light for a duration of 0.1-10 milliseconds; (3) defining the area in which the measuring light irradiates the sample liquid flow as a detecting area, and collecting light signals emitted from the area irradiated by the measuring light by a lens imaging system, and allowing the light signals collected by the lens imaging system to pass a field stop, so as to filter out the light signals outside the detecting area and enrich the light signals from the detecting area; and (4) subjecting the light signals enriched by the field stop to optoelectronic signal conversion. The method can achieve detection for nano-particles with a low refractive index and a particle size of 24-1000 nm as well as nano-scale gold particles with a particle size of 6.7-150 nm."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method for detecting nano-particles using a lens imaging system with a field stop","description":"Disclosed is a method for detecting nano-particles, comprising the steps of (1) compressing a sample liquid to be tested into a sample liquid flow by hydrodynamic focusing using a sheath fluid; (2) ir","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9739700","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-9739700","citation_suggestion":"Patentable. \"Method for detecting nano-particles using a lens imaging system with a field stop\" (US-9739700). https://patentable.app/patents/US-9739700","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9739700","json":"https://patentable.app/api/llm-context/US-9739700","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:29:07.696Z"}