IP (in percent of the total intensity) induced by the telescope mirrors and M4 before and after recoating of M1 and M3.
|Date||a (°)||Y (%)||J (%)||H (%)||Ks (%)|
Notes. The values are shown at optimal, nearly crossed configuration of the reflection planes of M3 and M4 (at a = 87°, with a the altitude angle of the Unit Telescope), and worst, close to aligned reflection planes (a = 30°: the lowest altitude at which the ADC can correct for atmospheric dispersion) for the IRDIS broadband filters.
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