Thermo-optical simulation and experiment for the assessment of single, hollow, and large aperture retroreflector for lunar laser ranging

Earth, Planets and Space

Table 6 Results of [Experiment I]

Temperature (°C)	Surface accuracy ZYGO interferometer [RMS wave (633 nm)]		Surface roughness AFM [Ra (nm)]
Temperature (°C)	Before	After	Before	After
100	0.007	0.007	0.096	0.104
400	0.006	0.006	0.099	0.111
600	0.006	0.006	0.105	0.127
800	0.004	0.007	0.164	0.233
1000	0.010	0.009	0.322	0.225

Surface accuracy and roughness measurements of Si plates. RMS stands for root mean square, and Ra stands for the arithmetic average of absolute topographic height