公开(公告)号：US20050087021A1

公开(公告)日：2005-04-28

申请号：US10764263

申请日：2004-01-23

申请人： Gregory Crawford ,  Darran Cairns ,  Christopher Bowley ,  Sorasak Danworaphong ,  Adam Fontecchio ,  Sadeg Faris ,  Le Li

发明人： Gregory Crawford ,  Darran Cairns ,  Christopher Bowley ,  Sorasak Danworaphong ,  Adam Fontecchio ,  Sadeg Faris ,  Le Li

IPC分类号： G01B11/16 ,  G01L1/24 ,  G02F1/1334

CPC分类号： G01B11/165 ,  G01B11/18 ,  G01L1/241 ,  G02F1/13342

摘要： A reflective strain gauge includes an holographically-formed polymer dispersed liquid crystal (H-PDLC) film comprising layers of liquid crystal (LC) droplets in a matrix polymer, the H-PDLC film having a reflection or transmission grating capable of reflecting or transmitting light of a selected wavelength, and means for adhering the film to a surface of a workpiece for monitoring the strain at said surface. A change in the nature of the reflected light is an indication of strain. Also included is a polarizing material having an holographically-formed polymer dispersed liquid crystal (H-PDLC) film comprising layers of liquid crystal (LC) droplets in a matrix polymer, the H-PDLC film having a reflection grating capable of reflecting light of a selected wavelength, wherein the reflection grating of the H-PDLC film is oriented, such that the refractive index parallel to said axis of orientation (ne) is greater than the refractive index perpendicular to said axis (no).

摘要翻译： 反射应变计包括在基质聚合物中包含液晶（LC）液滴层的全息形成的聚合物分散液晶（H-PDLC）膜，该H-PDLC膜具有能够反射或透射光的反射或透射光栅 以及用于将膜粘附到工件的表面以用于监测所述表面处的应变的装置。 反射光的性质的变化表明了应变。 还包括具有在基体聚合物中包含液晶（LC）液滴层的全息形成的聚合物分散液晶（H-PDLC）膜的偏振材料，该H-PDLC膜具有能够反射光的反射光栅 选择的波长，其中所述H-PDLC膜的反射光栅被取向，使得平行于所述取向轴（n）的折射率大于垂直于所述轴线的折射率（n ）。

公开(公告)号：US06778236B1

公开(公告)日：2004-08-17

申请号：US09584875

申请日：2000-06-01

申请人： Gregory P. Crawford ,  Darran R. Cairns ,  Christopher C. Bowley ,  Sorasak Danworaphong ,  Adam K. Fontecchio ,  Sadeg M. Faris ,  Le Li

发明人： Gregory P. Crawford ,  Darran R. Cairns ,  Christopher C. Bowley ,  Sorasak Danworaphong ,  Adam K. Fontecchio ,  Sadeg M. Faris ,  Le Li

IPC分类号： G02F11333

CPC分类号： G01B11/165 ,  G01B11/18 ,  G01L1/241 ,  G02F1/13342

摘要： A reflective strain gauge includes an holographically-formed polymer dispersed liquid crystal (H-PDLC) film comprising layers of liquid crystal (LC) droplets in a matrix polymer, the H-PDLC film having a reflection or transmission grating capable of reflecting or transmitting light of a selected wavelength, and means for adhering the film to a surface of a workpiece for monitoring the strain at said surface. A change in the nature of the reflected light is an indication of strain. Also included is a polarizing material having an holographically-formed polymer dispersed liquid crystal (H-PDLC) film comprising layers of liquid crystal (LC) droplets in a matrix polymer, the H-PDLC film having a reflection grating capable of reflecting light of a selected wavelength, wherein the reflection grating of the H-PDLC film is oriented, such that the refractive index parallel to said axis of orientation (ne) is greater than the refractive index perpendicular to said axis (no).

摘要翻译： 反射应变计包括在基质聚合物中包含液晶（LC）液滴层的全息形成的聚合物分散液晶（H-PDLC）膜，该H-PDLC膜具有能够反射或透射光的反射或透射光栅 以及用于将膜粘附到工件的表面以用于监测所述表面处的应变的装置。 反射光的性质的变化表明了应变。 还包括具有在基质聚合物中包含液晶（LC）液滴层的全息形成的聚合物分散液晶（H-PDLC）膜的偏振材料，所述H-PDLC膜具有能够反射光的反射光栅 选择的波长，其中H-PDLC膜的反射光栅被定向，使得平行于所述取向轴（ne）的折射率大于垂直于所述轴线（no）的折射率。