公开(公告)号：US06628383B1

公开(公告)日：2003-09-30

申请号：US09691725

申请日：2000-10-18

Applicant: Ronnie Lewis Hilliard

Inventor： Ronnie Lewis Hilliard

IPC: G01J340

CPC classification number: G01J3/2823 ,  G01J3/18 ,  G01J2003/1828

Abstract: The Ebert-type mounting is modified for use as a multiorder spectrograph, by replacing the spherical primary mirror of the Ebert with a paraboloidal mirror to eliminate the astigmatism and spherical aberration of the Ebert mounting, and by replacing the Ebert's rotating plane grating, normally blazed for use in the first order, with a fixed low-blaze-angle grating blazed at a longer wavelength such that the radiation at the shorter wavelengths, for which the grating will be used, will be most efficiently dispersed into a multiplicity of higher spectral orders. In a preferred embodiment of this invention, these spectral orders are separated using a twice-through cross-dispersing prism mounted near the grating surface, with the grating and prism mounted and aligned together in a crossed-dispersion assembly that is interchangeable with other crossed-dispersion assemblies containing other grating and prism combinations.

Abstract translation: Ebert型安装被修改用作多级光谱仪，通过用抛物面镜替换Ebert的球形主镜，以消除Ebert安装的散光和球面像差，并通过更换Ebert旋转平面光栅，通常闪耀 用于第一级，具有以较长波长闪耀的固定的低辉度光栅，使得将使用光栅的较短波长的辐射将最有效地分散到多个更高的光谱阶数 。 在本发明的优选实施例中，使用安装在光栅表面附近的两倍交叉分散棱镜来分离这些光谱阶数，其中光栅和棱镜安装在一起，并与交叉色散组件对准， 包含其他光栅和棱镜组合的色散组件。