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Monochromator and spectrometric method using plane diffraction grating
Monochromator and spectrometric method using plane diffraction grating
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机译：使用平面衍射光栅的单色仪和光谱法
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摘要
A monochromator and spectrometric method are disclosed wherein a measured beam 40 is converted into a parallel beam by a first collimator 20 and is diffracted by a plane diffraction grating 22, whereafter the diffracted beam 42 is returned, eg. using a reflecting member having at least two reflecting surfaces 24,26, so that the diffracted beam, after return, is separated from that before the return along rulings of the plane diffraction grating. The returned diffracted beam 43 is then again diffracted by the plane diffraction grating 22 and the resulting beam 44, condensed by a second collimator 28, is allowed to pass through an exit slit 30. An intermediate slit (50, 60, Figs 2, 3) and reflecting member (52, 54, 62, 64, Figs 2, 3) may be present.
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