Optics

Some of the optical components will be (re)coated before the instrument will be placed in its building. Bo Lindberg (Aarhus) will design a new fiber unit, with a new coupling to the telescope. The required fiber length to run from Cassegrain to the building is about 45 meters. A dedicated Cass calibration unit needs to be designed. The expected peak efficiency after these upgrades is about $\sim$8% (atmosphere+telescope+instrument+detector).