1. Ondřejov echelle spectrograph - OES Creator: Koubský, P., Mayer, P, Čáp, J., Žďárský, F., Zeman, J., Pína, L., and Melich, Z. Format: bez média and svazek Type: model:article and TEXT Subject: high dispersion spectrographs, echelle spectrographs, and white pupil solution Language: Czech Description: This paper describes the OES echelle spectrograph, a new coudé focus instrument of the 2 m telescope at Ondřejov Observatory. The design, optical scheme, and mechanical solutions are presented. A brief review of laboratory tests is given, too. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public