Fig. 3.44. Spot-diagrams for a Linfoot monocentric Schmidt-Cassegrain with spherical mirrors and a singlet (non-achromatic) corrector plate (400 mm, f/3.0 - f/6.0)
We first define the following basic parameters:
- Corrector plate at prime focus giving spi = +f' = —0.2
- Primary defined as spherical, therefore bs i =0
- Cassegrain image f'/10 behind pole of primary, therefore b = 0.1
The system is shown in Fig. 3.45. We derive the remaining parameters as follows:
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