Mounted on the left side of the pedestal is the opticaltracker with the dish-type millimetre-wave command link being mounted forward and below.
固定在支架左边的是光学追踪器，它与固定在前下方的碟形毫米波控制系统连接。
2
On the basis of summing up conventional testing methods for the radius of curvature of optical sphere, a novel method using laser tracker and interferometer is proposed.