Re: ATM first mirror

["James W. Burrows" <burrjaw@halcyon.com>]

On Wed, 14 May 1997, Glen Bankston wrote:

> i have ground and polished a 6" f10.2 blank.  if it checks ok on
> Foucault as a sphere, should i try and parabolize it? 

Also John H. Svensson had the same question for 6" f/9.

                        -------- surface ------
                        P-V, nm         RMS, nm
goal (1/4 wavefront)      69              20
6" f/10.2                 35              11
6" f/9                    51              16

So both spheres are probably left alone, particularly for a first mirror.

     -- Jim Burrows:     (206)244-2933, fax -0294
     -- E-mail:     burrjaw@halcyon.com
     -- Seattle:    WGS84 lat 0.828547, long -2.135692 (rad)