Planar Array Infrared Spectroscopy and 1-D Imaging

The two main differences between a PA-IR spectrograph and a conventional mid-IR dispersive spectrometer are the use of a large planar array detector rather than 

Infrared and Raman Spectroscopic Imaging. Edited by Reiner Salzer and Heinz W. Siesler Copyright 2009 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim iSBN 978-3-527-31993-0 

The frame rate of the FPA directly determines the time resolution of a PA-IR spectrograph, while its size can Hmit the achievable bandwidth/resolution and the field of view. Maximum frame rates vary between lOOps and 17 ms per spectrum, depending on FPA type and size. Such time resolutions are similar or significantly better than those possible with continuous-scanning FT-IR spectrometers. It should be pointed out that the Hmiting factor is often not the detection of the IR radiation, but rather the time necessary for the read-out and data transfer. Perfectly optimized electronics could eventually enable a 70 ps time resolution. 

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