Assembly and Testing of the ESI Camera DRAFT I

The Echellete Spectrograph and Imager (ESI), currently being developed for use at the cassegrain focus of the Keck II telescope employs an all spherical, 300 mm focal length F/1 Epps camera. The camera consists of 10 elements in 5 groups; one oil filled doublet, one oil filled triplet, one greased triplet and one singlet and a field flattener mounted in the dewar. Typical mounting tolerances are of order +/- 25 microns. In this paper we discuss the assembly and testing of this camera, along with error budgeting and tolerance analysis.