Rowland circle

Rowland circle

[′rō‚lənd ‚sər·kəl]
(spectroscopy)
A circle drawn tangent to the face of a concave diffraction grating at its midpoint, having a diameter equal to the radius of curvature of a grating surface; the slit and camera for the grating should lie on this circle.
References in periodicals archive ?
i+k] of the other facets on the grating are chosen to be on the second circle (twice the radius of the Rowland circle and tangent to the Rowland circle at point [P.
ARCOS stands for Advanced Rowland Circle Optical System.
The ARCOS is one of the few Rowland Circle ICP systems on the market.
The instrument uses 32 linear CCD detectors in an optimized Paschen-Runge mount ORCA (Optimized Rowland Circle Alignment) for simultaneously recording the wavelengths between 130 and 770 nm.
Curved diffraction gratings designed in a Rowland circle configuration have the property that a source located on the Rowland circle will be imaged on the circle at a location dependent on wavelength.