Re[2]: [ATM] A new flat-field anastigmatic aplant?

[Richard <cnc@cncservo.co.uk>]

Hi vladimir,

Monday, August 29, 2005, 3:42:18 PM, you wrote:

v> Which software to believe to?

Zemax, of course :)

The design optimises nicely :

Surf      Radius    Thickness       Conic
 OBJ    Infinity     Infinity           0
 STO    -2423.31    -1319.082  -0.9518228
   2   -351.6338     279.1091           0
   3   -410.7441    -505.7408           0
 IMA    30559.74                        0

Tertiary has 62mm central hole. Design was optimised
with EFFL=-1100mm
 
Focal plane curvature of about 100 feet, and worst case spot
size over a 1 degree FOV is 0.3um rms, 0.6um geometric for a
4.9um airy disk. Worst case Strehl 0.997. Big central
obstruction though. With 3 mirrors in that configuration I think
the Petzval sum could be brought to zero.

-- 

Best regards,
  Richard in the UK

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