R&D Services: Optical Sensor Development
The Sensor Applications Laboratory at Spectral Sciences develops hardware prototypes for Governmental and Industrial remote sensing applications that leverage SSI's extensive expertise in physics, chemical analysis of spectra, remote sensing, and radiation transport.
SSI has developed new, patented approaches to spectroscopy including Structured Emission Tomography (SET) for combustion monitoring applications and Dispersive Transform Spectroscopy (DTS), which employs Digital Micro-mirror Devices (DMDs) developed by Texas Instruments to implement fast, low-cost and rugged hyperspectral sensors and imagers.
Multispectral Imaging for Combustion Diagnosis and Control: Sensors include spectrographs, multispectral imagers, and probes for measuring spectral radiance in furnaces, engines and other flame environments. UV, visible, and near-IR wavelengths are used to infer the state of combustion, and multiple lines-of-sight can provide 2-D or 3-D flame shape information. Real-time feedback from these sensors can provide combustion control, as illustrated in an application for jet engines. The FASPEC instrument uses the DTS approach to produce a high-speed multi-wavelength, multi-line-of-sight approach to combustion monitoring.
Spectral Imagers based on DTS: SSI has developed unique, patented implementations of DMD-based DTS imaging in the mid- and long-wave infrared. FAROS is a spectral imager for fast, multiplexed imaging with on-the-fly adaptive spectral resolution and video-rate wideband imaging. TRACER is a second-generation prototype sensor for fast-frame, chemical-specific imaging in the thermal infrared.
Wide Area Space Surveillance Sensor: Inspired by systems such as SMEI and STEREO, WASSS is designed for space-based observation of spacecraft in geosynchronous (GEO) orbit from a low-earth-orbit (LEO) platform. The high stray light rejection allows viewing close to the sun, allowing for continuous monitoring of the GEO belt using an array of distributed LEO satellite platforms.
Tunable Quantum Cascade Laser Source: An external cavity using a DMD is the key technology in this random-access, rapidly tunable quantum cascade laser source for spectroscopic sensing applications.