The optical system is highly stable owing to the dedicated design as follows:

1. Highly stable optical bench with no need for adjustment or maintenance of optical path
2. Precision machinery ensures high scanning repeatability
3. Corner cube optics provides easy operation, removing complicated electronics and additional moving parts
4. Dynamic collimation system and movable mirror driving system keep the interferometer at optimum situation
5. Voice-coil driver and precision slide ensure the performance of the system under severe conditions
6. A container of desiccant that protects the beam splitter and other optical components from moisture invasio