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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Separation of the threshed grain through the concave grating can be increased two-fold (on average) using the experimental concave (Fig.
A meniscus lens is added before the concave grating to correct the aberration brought by the separation at the same time, as is shown in Figure 6.
Baets, "Planar concave grating demultiplexer fabricated on a nanophotonic silicon-on-insulator platform," IEEE Photon.
The investigation showed that there was no significant difference in the proportion of impurities that fell through the concave grating (Table 1) regardless of the shape of the threshing cylinder's spaces between the rasp bars.
However, RCWA cannot be used to simulate the imaging of a concave grating in the large free propagation region.
Previous studies have demonstrated that the variable radius concave improves the efficiency of corn grain separation through the concave grating by 2.5 [9].