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11.
公开(公告)号:US5912738A
公开(公告)日:1999-06-15
申请号:US756324
申请日:1996-11-25
IPC分类号: G01B11/255 , G01B11/24
CPC分类号: G01B11/255
摘要: Apparatus for measuring curvature of a surface wherein a beam of collimated light is passed through means for producing a plurality of parallel light beams each separated by a common distance which then reflect off the surface to fall upon a detector that measures the separation of the reflected beams of light. This means can be an etalon and the combination of a diffractive element and a converging lens. The curvature of the surface along the line onto which the multiple beams fall can be calculated from this information. A two-dimensional map of the curvature can be obtained by adding a second etalon (or a second combination of a diffractive element and a converging lens) which is rotated 90.degree. about the optical axis relative to the first etalon and inclined at the same angle. The second etalon creates an individual set of parallel light beams from each of the individual beams created by the first etalon with the sets of parallel light beams from the second etalon rotated 90.degree. relative to the line onto which the single set of parallel beams from the first etalon would have fallen.
摘要翻译: 用于测量表面的曲率的装置,其中准直光束通过用于产生多个平行光束的装置,每个平行光束以公共距离分开,然后反射离开表面以落在检测器上,该检测器测量反射光束的分离 的光。 该装置可以是标准具和衍射元件和会聚透镜的组合。 可以从该信息计算沿着多个光束落下的线的曲面的曲率。 可以通过添加相对于第一标准具围绕光轴旋转90°并以相同角度倾斜的第二标准具(或衍射元件和会聚透镜的第二组合)来获得曲率的二维图 。 第二标准具产生由第一标准具产生的每个单独波束的单独的一组平行光束,其中来自第二标准具的平行光束组相对于从其中的单组平行光束旋转90°的线组 第一个标准具会下降。
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公开(公告)号:US08902115B1
公开(公告)日:2014-12-02
申请号:US13191176
申请日:2011-07-26
申请人: Hung Loui , James Carroll , Paul G. Clem , Michael B. Sinclair
发明人: Hung Loui , James Carroll , Paul G. Clem , Michael B. Sinclair
CPC分类号: H01Q15/0086
摘要: A resonant dielectric metamaterial comprises a first and a second set of dielectric scattering particles (e.g., spheres) having different permittivities arranged in a cubic array. The array can be an ordered or randomized array of particles. The resonant dielectric metamaterials are low-loss 3D isotropic materials with negative permittivity and permeability. Such isotropic double negative materials offer polarization and direction independent electromagnetic wave propagation.
摘要翻译: 谐振介电超材料包括具有以立方阵列布置的不同介电常数的第一组和第二组介电散射颗粒(例如球体)。 阵列可以是有序或随机的粒子数组。 谐振介电超材料是具有负介电常数和磁导率的低损耗三维各向同性材料。 这种各向同性双负材料提供极化和方向独立的电磁波传播。
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