the novel design of lamost system is a telescope that provides a combination of a large aperture and a large field of view, both of which feed a highly-multiplexed spectroscopic system. lamost is a reflecting schmidt telescope with its optical axis fixed along the north-south meridian. both the schmidt mirror (ma) and the primary mirror (mb) are segmented. the focal surface is circular with a diameter of 1.75 meters (∼5°), 4000 fibers are almost evenly distributed over it. each of the fibers can be moved with two degrees of freedom by two motors. the dome for lamost has three towers aligned in a north-south direction, hosting mirror a, the focal surface and instruments, and mirror b respectively. mirror a has a transitional dome which can be opened completely. the focal surface and mirror b towers are connected by a tube structure.
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