本文研究了两种类型的二维横向剪切干涉仪：正交剪切棱镜型和网格光栅型。
Two types of two dimensional lateral shearing interferometers have been studied: orthogonal shearing prism and crossed grating.
就这两种双频光栅剖面术的原理、频域分析和三维重建的计算效率进行了详细的比较。
In this paper, we compared and analyzed these two gratings on the aspects of principles, spectrums and computation efficiency of three-dimensional reconstruction.
在北京某高速公路埋设了光纤光栅传感器以开展应变研究，两组三维传感器组分别被布设于沥青路面的中、下面层以获取各层位内的三维应变信息。
The FBG sensors were embedded in a Beijing freeway, and two 3D-sensor groups were placed in middle and bottom layers of bituminous concrete pavement to capture 3D strain information.
系统介绍了两种投影光栅三维形状测量技术的原理、方法、硬件和软件，并介绍了在船用柴油机设计中的应用。
Two projecting grating 3-D shape measuring methods are developed, which have advantage of easy practicing, non-contacting and getting whole fields information and easy to realize.
系统介绍了两种投影光栅三维形状测量技术的原理、方法、硬件和软件，并介绍了在船用柴油机设计中的应用。
Two projecting grating 3-D shape measuring methods are developed, which have advantage of easy practicing, non-contacting and getting whole fields information and easy to realize.
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