Versatile Spectroradiometer
The Versatile Spectroradiometer (VSR) is a compact, high-sensitivity spectroradiometer using Fourier Transform Infrared (FT-IR) technology. Its high-speed, robust design makes it ideal for multi-scenario operation — from the laboratory to airborne platforms operating in heavy vibration environments. The VSR delivers real-time, high-resolution spectral information on both slow and fast-occurring phenomena, and performs material and target signature analysis across an ultra-wide spectral range using a unique three-detector configuration.
| Key Features |
|---|
| • Ultra-wide bandwidth — covers SWIR, MWIR & LWIR (0.9 – 20 µm) with a unique 3-detector configuration |
| • High spectral resolution — software-selectable from 1 to 128 cm⁻¹ |
| • High-speed, vibration-tolerant scanning — up to 125 spectra/s; operates in any direction including airborne platforms |
| • Cryogen-free (LN2-free) operation — thermoelectric cooler-controlled cold reference for stable, fieldable use |
| • Remote diagnostics via TCP/IP & EDGAR™ software — real-time radiance, irradiance, and brightness temperature output |
System Specifications
| Parameter | Specification |
|---|---|
| Optical | |
| Spectral Range | 0.9 – 20 µm (500 – 11,111 cm⁻¹) |
| Detectors | InSb (1.7 – 5 µm, MWIR) + HgCdTe/MCT (5 – 20 µm, LWIR) standard; InGaAs (0.9 – 1.7 µm, SWIR) optional |
| Spectral Resolution | 1, 2, 4, 8, 16, 32, 64, or 128 cm⁻¹ (software-selectable) |
| Field of View (FOV) | 80 mrad (wide, 0.5x) / 25 mrad (medium, 2x) / 5 mrad (narrow, 7x) — interchangeable telescopes, no realignment required |
| FOV Uniformity | +/- 5% over 80% of FOV |
| Radiometric Performance | |
| NESR @ 1,300 cm⁻¹ | 2.5 x 10⁻⁹ W/sr/cm²/cm⁻¹ |
| NESR @ 2,000 cm⁻¹ | 2.5 x 10⁻¹⁰ W/sr/cm²/cm⁻¹ |
| NESR @ 6,300 cm⁻¹ | 3 x 10⁻¹¹ W/sr/cm²/cm⁻¹ |
| Measurement Rate | 1 – 125 spectra/s (resolution and sweep-speed dependent) |
| Calibration | Real-time radiometric calibration; cryogen-free TEC cold reference standard; external blackbody sources optional |
| Output Units | Radiance, Irradiance, or Brightness Temperature |
| Software & Interface | |
| Software | EDGAR — camera control, data acquisition, processing & analysis; fully scriptable; 1 license included |
| Supported Formats | MATLAB, NETCDF, 16-bit & 32-bit binary |
| Remote Access | TCP/IP — remote control, health monitoring & diagnostics |
| Mechanical & Environmental | |
| Dimensions (L x W x H) | 36 x 41 x 30 cm (without telescope) |
| Weight | <23 kg (without telescope) |
| Power | <45 W; 115 VAC or 230 VAC |
| Operating Temperature | -20 °C to +40 °C |
| Operating Pressure | 12 – 105 kPa (suitable for airborne use) |
| Humidity | 0 – 90% non-condensing |
| Vibration Tolerance | <=1 G (RMS) over 5 – 500 Hz |
| Shock Tolerance | <=6 G during 10 ms |
