Optical Surfaces off-axis paraboloids feature typical microroughness less than 1.2 nm RMS
A line of off-axis paraboloids is suited for broadband or multiple wavelength applications. They are available up to 600 mm diameter in noncircular shapes and off-axis angles as large as 45°. Surface accuracy is up to λ/20 at 633 nm and microroughness is typically <1.2 nm RMS.
Optical Surfaces
Kenley, England