Cooled IR detectors with integrated optics for detection and imaging applications

Based on the architecture and performance of legacy fielded integral optics cooled detectors, SemiConductor Devices (SCD) is developing next-generation integrated optics detectors for large and medium FOV applications. This paper presents the concept, design, and characterization of integrated optics cooled detector modules optimized for detection and imaging applications in the mid-wave infrared (MWIR) spectral band. These detectors feature small pixel pitches down to 5 μm and support large-format focal plane arrays (FPAs), enabling systems to achieve a narrow instantaneous field of view (IFOV) while maintaining a compact optical and mechanical envelope. The combination of small pitch and large array format enables single-field optical designs with digital zoom capability, reducing system complexity and improving optical stability. By combining precision optical elements with advanced FPAs and innovative packaging approaches, the modules deliver improved optical efficiency, reduced stray radiation, and enhanced overall imaging performance. The integration of optics and detector components within a cryogenically cooled package minimizes alignment sensitivity, shortens the optical path, and provides improved thermal stability under varying environmental conditions. The resulting lightweight, vibration-tolerant assemblies are compatible with a wide range of platform environments. These integrated optics cooled detectors establish the foundation for next-generation electro-optical systems offering superior sensitivity, spatial resolution, and systemlevel efficiency for defense applications such as Missile Approach Warning Systems (MAWS), Situational Awareness systems, and drone-based persistent surveillance [7].