Idesawa M, Yatagai T, Soma T
Appl Opt. 1977 Aug 1;16(8):2152-62. doi: 10.1364/AO.16.002152.
A new type of moiré and its application to topography are discussed. moiré fringes are generated by observing a grating projected on an object under test with a scanning imaging device. The general equations of the projection-type moiré topography are given. By controlling the phase, the pitch, or the direction of the virtual grating corresponding to the scanning lines of the imaging device, the automatic sign determination of the contour lines is accomplished. By the use of a high precision flying spot scanner with CRT(DD-tube) and a minicomputer system, an experimental measurement system is developed. Very significant is the fact that a contour line system and a sectional shape of the object are automatically reconstructed and displayed on a color TV monitor.
讨论了一种新型莫尔条纹及其在地形测量中的应用。通过用扫描成像设备观察投射在被测物体上的光栅来产生莫尔条纹。给出了投影型莫尔地形测量的一般方程。通过控制与成像设备扫描线相对应的虚拟光栅的相位、间距或方向，实现了等高线的自动符号确定。利用带有阴极射线管（DD 管）的高精度飞点扫描仪和小型计算机系统，开发了一个实验测量系统。非常重要的是，物体的等高线系统和截面形状能够自动重建并显示在彩色电视监视器上。
