ETM E080512-V2
FROM
Optical Surface Figure, measured over the central 160 mm diameter
Surface 1: Spherical, concave. Radius of curvature: 2245 m ± 3 m.
TO - V3
Optical Surface Figure, measured over the central 160 mm diameter
Surface 1: Spherical, concave. Radius of curvature (R): 2245 m -5, +15 m absolute accuracy
ROC precision: R ± 3 m where 2240 m = R = 2260 m for all ETM optics