Spatially-resolved Infrared Spectrometer
The SpIRS (Spatially-resolved Infrared Spectrometer) is a fast-scanning interferometer modulator equipped with field imaging optics, designed specifically for hyperspectral applications. Built on Fourier Transform Infrared (FTIR) technology, the SpIRS simultaneously acquires data on two 8×8 infrared detector arrays at a full frame rate of 45 frames per second at 16 cm⁻¹ spectral resolution. Covering an ultra-wide spectral bandwidth from the SWIR through MWIR to LWIR (1.47 – 12.2 µm) using interchangeable cooled detector modules, the SpIRS delivers precise, spatially-resolved spectral data for demanding infrared signature, defense, and remote sensing applications.
| Key Features |
|---|
| • High spectral resolution — down to 1 cm⁻¹ for detailed spectral analysis across SWIR, MWIR, and LWIR bands |
| • Ultra-wide spectral bandwidth — 1.47 – 12.2 µm continuous coverage with interchangeable cooled detector modules (SLS, InSb) |
| • Simultaneous dual-detector acquisition — supports up to 2 focal plane array (FPA) modules at the same time |
| • High temporal resolution — up to 45 data cubes per second at 16 cm⁻¹ spectral resolution |
| • Multiple FOV configurations — wide, medium (2x telescope), and narrow (6x telescope) field-of-view options for flexible deployment |
System Specifications
| Parameter | Specification |
|---|---|
| Detector | |
| Detector Type | Cooled SLS (LWIR), InSb (MWIR), InSb (SWIR) — supports up to 2 FPA modules simultaneously |
| Detector Format | 8 × 8 pixels per module |
| Spectral | |
| Spectral Range — LWIR | 5.0 – 12.2 µm |
| Spectral Range — MWIR | 2.5 – 5.7 µm |
| Spectral Range — SWIR | 1.47 – 2.63 µm |
| Spectral Resolution | Down to 1 cm⁻¹ |
| Typical NESR (≤5 µm) | ≤15 nW/sr/cm²/cm⁻¹ |
| Typical NESR (>5 µm) | ≤25 nW/sr/cm²/cm⁻¹ |
| Imaging & Field of View | |
| Wide FOV (no telescope) | 83 mrad (iFOV: 9.43 mrad) |
| Medium FOV (2x telescope) | 41.5 mrad (iFOV: 4.71 mrad) |
| Narrow FOV (6x telescope) | 13.8 mrad (iFOV: 1.73 mrad) |
| Measurement Rate | Up to 45 data cubes/sec (at 16 cm⁻¹ resolution) |
| Mechanical & Environmental | |
| Dimensions (L × W × H) | 76 × 52 × 46 cm (without accessories) |
| Weight | 70 kg (without telescope) |
| Power Consumption | <240 W — 115 or 240 VAC, 50–60 Hz |
| Operating Temperature | -10 °C to +40 °C |
