
%0 Journal Article
%A Steel, WH 
%T The Design of Reflecting Microscope Objectives
%J Australian Journal of Chemistry
%D 1951/03/01
%V 4
%N 1
%P 1-11
%K 
%R https://doi.org/10.1071/CH9510001
%U https://www.publish.csiro.au/paper/CH9510001 
%X The general theory is developed and the exact solutions obtained for the design of reflecting microscope objectives having two or three concentric spherical surfaces. It is shown that the only serious optical defect of reflecting objectives, low contrast due to the high obstruction ratio, can be satisfactorily controlled in three-mirror systems.   Non-concentric objectives are discussed, but in practice prove to be difficult to adjust. 
