Basic Optical Parameters

Primary ("M1"):

Radius of curvature 21311.6 mm concave
Conic constant -1.09763
Mirror diameter 4022.9 mm (see CH2150.260-A001)
Bare mirror clear aperture diam 3965.4 mm
Central hole diam 1317.8 mm
Used clear aperture diam 3934 mm (August 00 after installation of seal CH2922-A001)
Central obscuration diam 1651 mm (PF cage baffle for f/8 M2)
Light-collecting area 10.014 m^2

 

F/7.8 secondary ("M2"):

Distance from primary 7494.25 mm
Radius of curvature  9569.6 mm convex
Conic constant -5.2625
Clear aperture diam 1295.4 mm

 

F/14.5 secondary: Retired!

Distance from primary 8.6212e03 mm
Radius of curvature 4.9865e03 convex
Conic constant -3.044206
Clear aperture  

 

F/30 secondary: Retired!

Distance from primary 9.6871e03 mm
Radius of curvature 2.1153e03 convex
Conic constant -2.8056
Clear aperture: