SP-436 Project Orion: A Design Study of a System for Detecting
Extrasolar Planets
Figure 10. Schematic representation of a detector system
employing a sequence of gratings to define accurate position
measurements. Light incident on gratings G1 and G2 is focused by lens
L1 on a field-defining aperture (FD) and refocused by lens L2 on a
detector (see text for further discussion).
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