| 摘要 |
A spectrograph with a first concave spectrographic diffraction grating (16) is positioned to receive light from the input light source (12) is configured to provide a diffracted light output dispersing the components of the input light source in a first direction. The dispersion forms the input light into an intermediate spectrum. The intermediate spectrum is formed in a focal surface by the once diffracted light. A slit (18) is substantially positioned on the focal surface. A second concave diffraction grating (20) is positioned to receive once diffracted light from the slit and configured to provide a twice diffracted light output, the second concave diffraction grating dispersing the components of the input light source in a second direction. The second direction is different from the first direction, the dispersion forming the input light into an output spectrum.
|
