However, in practice, the excursion, transmission refraction and optics aberrance of the laser beam will affect the measuring precision.
但在实际应用中，激光光束的漂移、传输折射以及光学畸变对测量系统的测量精度具有不可忽视的影响。
2
The paper is based upon Aero-Optics theory, pursuing the methods and realization for measuring the density distribution of transient flow field in wind tunnel test.
本论文基于气动光学理论，研究在流场试验中检测高速瞬态流场密度分布的方法与实现。
3
This paper presents a method of measuring the particle mean size and dust concentration by small angle near forward light scattering optics and the extinction theory.