This inventor holds 2 USPTO granted patents. Top assignees: Weifour, Inc., Other. Active years: 2010-2013.
Company Filing History:
1 out of 1 
1 out of 834,411 Years Active: 2010-2013
Title: Innovations by Yingwu Lian
Introduction
Yingwu Lian is an accomplished inventor based in Artesia, CA (US). He has made significant contributions to the field of optical coatings, holding a total of 2 patents. His work focuses on developing advanced materials and methods that enhance the performance and longevity of optical elements.
Latest Patents
One of Yingwu Lian's latest patents is the "Low absorption optical coating apparatus and related methods using ThF4/BaF2 combination." This invention presents a very low energy-absorption coating designed for high power CO2 lasers. The coating includes a thin layer of ThF4, which acts as a water/moisture barrier, combined with BaF2 for various optical elements. When applied to a ZnSe substrate or other suitable materials, this coating significantly extends the useful life of optical components by preventing moisture adsorption that can occur within just a few days of exposure to air. The coating comprises a BaF2 layer of approximately optical quarter wave thickness, a thin 200-300 Angstrom layer of ThF4 as a water barrier, a thin 1000-2000 Angstrom layer of ZnSe, and an optional ZnSe layer of optical half wave thickness. This innovative coating provides very low energy absorption for a 10.6 um CO2 laser at a value of less than 0.15%, offering longer lifetimes compared to conventional coated lenses that do not utilize the BaF2 and ThF4 combination. The specific thicknesses of the various coating layers can be modified while still delivering numerous benefits.
Another notable patent is related to "Rapid acquisition ellipsometry." This invention pertains to optical assemblies that impart a spatially dependent rotation to linearly polarized light. By using a pair of optical assemblies, it is possible to apply a spatially dependent rotation to linearly polarized light in the region between the assemblies, resulting in a spatially independent rotation after passing through the second assembly. This technology can be combined with a wave plate to determine the Stokes parameters of an elliptically polarized beam of light.
Career Highlights
Yingwu Lian has worked with various companies throughout his career, including Weifour, Inc. His expertise in optical coatings and related technologies has positioned him as a valuable contributor to the field.
Collaborations
Yingwu has collaborated with notable individuals such