Mr. Michael Ascenzi Profile

Michael Ascenzi

at Physical Sciences Inc

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Proceedings Article | 31 May 2022 Presentation + Paper

An ultra-compact shortwave infrared hyperspectral imaging system

Jay Giblin, Rusha Chatterjee, Michael Chase, Michael Ascenzi, Jonathan Rameau, Julia Dupuis, Jacob Martin, Joseph Meola

Proceedings Volume 12094, 1209406 (2022) https://doi.org/10.1117/12.2618318

KEYWORDS: Sensors, Calibration, Reflectivity, Short wave infrared radiation, Hyperspectral imaging, Digital micromirror devices, Spectral resolution, Spectroscopy

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Physical Sciences Inc. has developed an ultra-compact shortwave infrared (SWIR) staring mode hyperspectral imaging (HSI) sensor with an additional visible full motion video (FMV) capability. The innovative HSI design implements a programmable micro-electromechanical system entrance slit that breaks the interdependence between vehicle speed, frame rate, and spatial resolution of conventional push-broom systems and enables staring-mode operation without cooperative motion of the host vehicle or aircraft. The FMV and HSI components fit within 1000 cm³, weigh a total of 2.1 lbs., and draw 15 W of power. The sensor mechanical design is compatible with gimbal-based deployment allowing for easy integration into ground vehicles or aircrafts. The FMV is capable of achieving NIRS-6 imagery over a 6°×6° field-of-view (FOV) at a 1500 ft. standoff. The SWIR HSI covers a spectral range of 900-1605 nm with a 15 nm spectral resolution, and interrogates a 5°×5° FOV per 1.6 s with a 2.18 mrad instantaneous FOV (1 m ground sample distance at 1500 ft.). A series of outdoor tests at standoffs up to 300 ft. have been conducted that demonstrate the payload’s capability to acquire HSI information. The payload has direct utility towards diverse remote sensing applications such as vegetation monitoring, geological mapping, surveillance, etc. The data product utility is demonstrated through the spectral identification of materials (e.g. foam and cloth) placed in the sensor’s FOV.

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