发明名称 |
TANDEM DISPERSIVE RANGE MONOCHROMATOR |
摘要 |
Aspects of a tandem dispersive range monochromator are described herein. In one embodiment, the monochromator includes a light source that provides broadband light, a tandem diffraction grating including a first diffraction grating and a second diffraction grating, a grating drive motor that rotates the tandem diffraction grating to provide dispersed wavelengths of light, a detector that detects a portion of the dispersed wavelengths of light, and processing circuitry that controls a grating drive motor to regulate an angular velocity of the tandem grating based on an angular orientation of the tandem diffraction grating. By using a tandem diffraction grating having different dispersive surfaces, measurements of relatively high precision and quality may be taken throughout a wider spectral range. In another aspect, the processing circuitry controls a sample drive motor to vary an angle of incidence of the dispersed wavelengths of light onto a sample for evaluation. |
申请公布号 |
US2014268106(A1) |
申请公布日期 |
2014.09.18 |
申请号 |
US201414213214 |
申请日期 |
2014.03.14 |
申请人 |
WESTCO SCIENTIFIC INSTRUMENTS, INC. |
发明人 |
Workman, JR. Jerome J.;Saraf Tushar;Bennett Thomas Andrew |
分类号 |
G01J3/18 |
主分类号 |
G01J3/18 |
代理机构 |
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代理人 |
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主权项 |
1. A monochromator, comprising:
a light source that provides broadband light; a tandem diffraction grating including a first diffraction grating, a second diffraction grating, and a mounting assembly having a rotatable shaft to rotate the tandem diffraction grating; a grating drive motor that rotates the tandem diffraction grating about a pivot point of the rotatable shaft to provide dispersed wavelengths of light by diffraction of the broadband light; an exit slit that passes at least a portion of the dispersed wavelengths of light onto a sample tray that holds a sample for evaluation; a detector that detects a reflection of the portion of the dispersed wavelengths of light off the sample; and processing circuitry that controls the grating drive motor to regulate an angular velocity of the tandem diffraction grating based on an angular orientation of the tandem diffraction grating. |
地址 |
Brookfield CT US |