YBT Frowland Concave Diffraction Grating concave grating

Concave Holographic Gratings for Flat-Field Spectrographs

Aberration corrected flat field gratings are designed to focus a spectrum on a plane surface, making them ideal for use with linear or 2-D array detectors. These gratings are computer-optimized to form near-perfect images of the entrance slit on the detector plane. The relative location of grating to detector is kept fixed.

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