{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9612480","patent":{"patent_number":"US-9612480","title":"Method of producing a phase device based on a twisted liquid crystal having optimized structure operating under unpolarized light","assignee":null,"inventors":[],"filing_date":"2012-07-19T00:00:00.000Z","publication_date":"2017-04-04T00:00:00.000Z","cpc_codes":["G02F","G02F","G02F"],"num_claims":4,"abstract":"The invention relates to a method of producing a phase device operating at at least one wavelength (λ) comprising a cell containing a liquid crystal possessing a helical structure, inserted between two alignment layers possessing rubbing axes and means for applying a voltage to said cell, said helical structure exhibits a number of helical turns k, said liquid crystal exhibiting a defined angle of twist Θ between the rubbing axes of the two alignment layers, characterized in that it comprises the following steps: —the determination of a compensation angle ε satisfying the following equation: (formula) with: N the integer closest to (formula) the angle of twist Θ=2Kπ−εΔn: the birefringence of the liquid crystal; d: the thickness of the liquid crystal cell; λ: the wavelength of the light beam which passes through the liquid crystal cell; the rubbing of one of the faces in a direction of alignment of said liquid crystal molecules, defining the angle of twist: θ=2Kπ−ε."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method of producing a phase device based on a twisted liquid crystal having optimized structure operating under unpolarized light","description":"The invention relates to a method of producing a phase device operating at at least one wavelength (λ) comprising a cell containing a liquid crystal possessing a helical structure, inserted between tw","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9612480","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-9612480","citation_suggestion":"Patentable. \"Method of producing a phase device based on a twisted liquid crystal having optimized structure operating under unpolarized light\" (US-9612480). https://patentable.app/patents/US-9612480","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9612480","json":"https://patentable.app/api/llm-context/US-9612480","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T08:19:15.334Z"}