| Popis: |
The FIRST telescope will be made of carbon fiber reinforced plastic. The optics follow a two mirror near-classical Ritchey-Chretian design, but deviates from that in two respects. The secondary mirror defines the pupil of the system, and the primary mirror is uncommonly fast at f/0.5. After presenting the optical design, the sensitivities will be presented. Current work in progress will be described in the following areas; (1) secondary mirror figure correction (2) stray light (3) primary mirror gaps (4) standing wave impact on the heterodyne instrument for FIRST (HIFI). |
