concave grating

concave grating

[′kän‚kāv ′grād·iŋ]
(spectroscopy)
A reflection grating which both collimates and focuses the light falling upon it, made by spacing straight grooves equally along the chord of a concave spherical or paraboloid mirror surface. Also known as Rowland grating.
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The concluded TRP Advanced large FOV UV/VIS/NIR/SWIR spectrometers has identified high efficiency reflective concave gratings working over a large band as a key technology to enable the manufacturing of instruments that encompass the performances of OLCI in terms of optical quality spatial resolution and compactness.
Wide band and high efficiency reflective grating

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