Figure 6 shows the general layout of the Calibration system.
The unit is equipped with a white and two arc lamps. The standard arc lamps are CuAr and CuNe and manufactured by S.& J. Juniper, with references 4114QA and 4114QN, respectively. They can be switch on simultaneously. The white lamp is a quartz-halogen tungsten lamp supplied by Dolan-Jenner of the type DDL.
Figure 6: The Calibration system
A liquid lightguide is used to illuminate a region of the focal plane, accessible to the scientific bundles by rotating the SP (see also Figure 4).
A set of coloured filters are available within WYFFOS to suppress strong arc lines.
A more detailed description may be found in INT-IAC-DDD-004.