parallel beam [光] 平行光束 ; 平行波束 ; [核] 平行束
parallel beam projector 平行光束投射器
parallel beam diameter 平行光斑直径
parallel beam stress meter 平行光束应力测定仪
parallel-beam transform 平行射线束变换
parallel-beam approximation 平行光束近似
parallel-beam radiation 平行光束辐射
parallel beam type 平行梁式
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But the parallel-beam can not be realized directly in engineering.
平行束投影在工程上是不能直接实现的。
On this foundation, it simulates the projections for double Gauss distribution function and reconstructs the simulating temperature field by the convolution method for parallel beam.
依此原理，模拟了双高斯分布函数的投影，并由平行束卷积法重建出模拟的温度场。
According to comparison between the Gaussian beam and ideal parallel beam, some conclusions are given which ensure the measuring fineness when we make some measurements with the beam diffraction.
根据高斯光束与理想平行光束的对比，给出了若干结论，从而保证了在利用光束衍射进行某些测量工作时的测量精度。
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