Table 2.
Optical design parameters of the HRIEUV and HRILya channels.
| HRIEUV | HRILya | |
|---|---|---|
| Focal length | 4187 mm | 5804 mm |
| Entrance pupil | 47.4 mm | 30 mm |
| Field of view | 1000 arcsec2 | 1000 arcsec2 |
| Plate scale | 50 arcsec mm−1 | 31.5 arcsec mm−1 |
| Detector | 2048 × 2048, 10 μm pixels | 2048 × 2048, 14.1 μm virtual pixel size |
| Primary mirror (M1) | 66 mm ⌀ (54 mm useful) 80 mm off-axis | 42 mm ⌀ (38 mm useful), 80 mm off-axis |
| RC = 1518.067 mm CC = −1 | RC = 1143 mm CC = −1 | |
| Secondary mirror (M2) | 25 mm ⌀ (12 mm useful), 11.44 mm off-axis | 20 mm ⌀ (18 mm useful), 7 mm off-axis |
| RC = 256.774 mm CC = −2.04 | RC = 91 mm CC = −0.65 |
Notes. Here, RC is the radius of curvature and CC is the conic constant.
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