TRENTON, N.J., May 9, 2012 — An imaging spectrograph from Princeton Instruments, the IsoPlane SCT-320, features a new optical design that eliminates the primary aberrations present in traditional imaging spectrographs. It produces images that are clearer and sharper across the focal plane and, as a result, more photons end up in spectral peaks, significantly increasing the effective signal-to-noise ratio.
Czerny-Turner imaging spectrographs are subject to imaging aberrations such as coma, astigmatism and spherical aberration. Coma limits the spectral resolution of a spectrograph at most wavelengths because it can be eliminated at only a single grating angle. The IsoPlane SCT-320 reduces coma, preserving spectral resolution at all wavelengths.
Astigmatism appears as a vertical distortion of an image, limiting both spectral and spatial resolution. Astigmatism is eliminated in the IsoPlane SCT-320 spectrograph, meaning that many more fibers in a bundle can be resolved, eliminating crosstalk in multichannel spectroscopy.
The mirror-based device combines high-quality imaging with an
f/4.6 aperture, a motorized triple-grating turret and an ultrastable mechanical design.
Applications include multichannel spectroscopy, microspectroscopy, Raman scattering, fluorescence, photoluminescence, laser-induced breakdown spectroscopy, Fourier-domain spectroscopy and biomedical imaging.
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