AstroSystems - Secondary Mirrors

Secondary Mirrors

Our superior quality elliptical secondary mirrors are made of precision annealed Pyrex blanks, ground to the
exact minor axis dimension.  All secondary mirrors are made by our own optician, providing complete control of
quality from start to finish.  All secondary mirrors are interferometrically tested for flatness using a Zygo
interferometer during manufacture and prior to shipping.  Secondary mirrors meet or exceed 1/10th wave
flatness for sizes of 3.1 inch and under, 1/8 wave flatness for  3.5 inch to 4.5 inch and 1/6 wave flatness
for 5.0 inch to 7.0 inch.  All AstroSystems secondary mirrors are coated with enhanced aluminum, giving 95-96%
reflectivity and long coating life.  Superior performance for new or retrofitted telescopes.  Call for
availability on secondary mirrors over 4.0 inch.