The versatility of the MIR8035™ FT-IR scanner is highlighted by its large family of interchangeable detectors, which include Silicon, InGaAs, InSb, DTGS, and MCT.
Normalized spectrum of blackbody radiation @1273 K, recorded with MIR 8035 Scanner and Detectors under non-purged operating conditions. Spectra show atmospheric absorption of water and carbon dioxide.
InSb detectors exhibit superior performance over its operating range and approaches the maximum theoretical limit of sensitivity for background-limited applications. This detector requires liquid nitrogen cooling. A preamplifier is integrated into the design, which reduces the effects of background radiation. It is matched with the detector, allowing the detector to function at its ideal operating point. A manually adjustable iris is included with the 80021. Its diameter range is from 2-36 mm.
Near-IR Detectors
These photodiode detectors cover the near infrared region, 14,000 to 6,000 cm-1 (0.7 to 1.7 µm). These detectors operate at room temperature without requiring liquid nitrogen or thermoelectric cooling to achieve low noise performance. Each model features a built-in transimpedance amplifier powered by the FT-IR scanner. Gain settings are user selectable. The aspheric focusing lens position is adjustable to maximize signal. The Silicon detector version is the best choice for NIR applications from 0.7 to 1.0 µm. When compared to other Oriel® FT-IR detectors, the InGaAs detector version achieves the highest specific detectivity over its spectral range.
Normalized spectrum of blackbody radiation @ 1273 K, recorded with MIR 8035 and Near Infrared Detectors.
Mercury Cadmium Zinc Telluride Detectors
Mercury Cadmium Telluride (MCT) detectors exhibit fast response times, a wide dynamic range, and broad spectral response. A two-stage, low noise amplifier is built into the housing and requires no user adjustments. A manually adjustable iris has been integrated into the housing, which can act as a Jacquinot Stop. The iris uses standard Oriel 1.5-Inch Series male and female flanges, allowing it to be easily integrated into the FT-IR system, if desired.
Spectrum of 1273K blackbody captured with the 80026 MCT Detector, KBr beamsplitter and the MIR 8035™ Scanner.
How To Choose a Detector?
This flow chart provides a quick reference for configuring a complete FTIR system.
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