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.
References in periodicals archive ?
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.
Baets, "Planar concave grating demultiplexer fabricated on a nanophotonic silicon-on-insulator platform," IEEE Photon.
This 16-bit concave grating spectrometer is USB-2 powered, shock-proof and vibration tolerant with no moving parts.
However, RCWA cannot be used to simulate the imaging of a concave grating in the large free propagation region.
This 16-bit concave grating spectrometer is USB-2 powered, shock-proof and vibration tolerant with no moving parts and includes the powerful SpectraWiz spectrometer software and development kit.
The CXR-FS system comprises a miniature fiber optically coupled, thermo electrically cooled (TEC) UV-Vis spectrometer with concave grating, an LED-based excitation source, and a dual-read cuvette sample holder.
The BP1 can also be used to concurrently power a proprietary EPP2000C concave grating UV-VIS spectrometer and obtain a complete UV-VIS-NIR spectrum.
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.
8 [micro]m at 7 [micro]m pitch Gratings Aberration corrected concave gratings with 590, 1105 and 3240 gr/mm at grating centre Average 8, 24 and 43 pm/pixel for the spectrographs covering the ranges 129-200, 200-410 and 410-780 nm, respectively Sample stand Argon flushed, water-cooled table with self-contained, closed loop coolant system Software WinOE THERMO ELECTRON CORPORATION (THERMO ARL) En Vallaire Quest C, case postale CH- 1024 Ecublens, Switzerland +41 21 694 7111 www.