Frequently Asked Questions

Type IV aberration corrected flat field & imaging gratings provide much better light collection efficiency and signal to noise ratio than traditional Type I Rowland circle concave gratings.

The grooves are produced with grooves that are neither equispaced nor parallel, and are computer optimized to form near-perfect images of the entrance slit on the detector plane.

The dispersion range and wavelength range vary depending on the reference number, but they range from 4-36 nm/mm and 200-1170 nm, respectively.

It is often possible to focus multiple sources onto the entrance slit and independently evaluate the spectrum from each source.

It is designed to focus a spectrum onto a plane surface, making it ideal for use with linear or 2-D array detectors.

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