摘要: A 3 m grating spectrograph with a conventional Eagle mounting, except that fixed settings are used for the orientation of the grating and the plate holder, was built. The vacuum system, slit, grating mounting, plate holder, and li... 展开 A 3 m grating spectrograph with a conventional Eagle mounting, except that fixed settings are used for the orientation of the grating and the plate holder, was built. The vacuum system, slit, grating mounting, plate holder, and light source connection are described. Operating instructions are given. The spectrograph can be used in the first order from 400 to 8000 A. Dispersion is between 2.61 and 2.78 A/mm. 收起