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针对一种新型的声光波干涉测量技术,对声光栅正弦结构光投射器的三维测量工作原理进行了系统的分析,讨论了影响投射器光学系统结构的因素和影响接收屏上的光照度的因素,并进行了光学系统设计。在优化设计过程中,采用了限制光线最大入射角的方法,达到控制投射系统的球差和保证接收屏上照明均匀的要求。所设计的声光栅正弦光投射器具有很好的成像质量。应用该系统对在500mm处的石膏像上投射干涉条纹,可以得到能量比较均匀、变形量很小的干涉条纹图,利用该条纹图和相关的算法可以对具有复杂几何形状的物体进行有效的三维测量。
Aiming at a new type of acousto-optic interferometry technology, the working principle of three-dimensional measurement of acoustic grating sinusoidal structured light projector is systematically analyzed. The factors which affect the structure of projector optical system and the factors affecting the illuminance on the receiving screen are discussed. And the optical system design. In the process of optimization design, the method of limiting the maximum angle of incidence of light is adopted to achieve the spherical aberration of the projection system and ensure uniform illumination on the receiving screen. The designed acoustic grating sinusoidal light projector has good imaging quality. By using this system to project the interference fringes on the gypsum image at 500mm, an interference fringe pattern with relatively uniform energy and small deformation can be obtained. The fringe pattern and the related algorithm can be used to perform effective three-dimensional measuring.