Curving of large-format infrared sensors

Mark R. O'Masta; Binh-Minh Nguyen; Alexander Gurga; Trevor Sasse; Brian Hempe; Christian Neuhaus; Eric C. Clough; Jacob Hundley; Pamela R. Patterson; James Jenkins; Mary Chen; Gregory Jacques; Scott Linton; Francisco Perez; Colin Van Ysseldyk; Esther Wang; Yan Tang; Kenta Niwa; Tobias Schaedler; Alexandros Kyrtsos; John Glennon; Andreu Glasmann; Enrico Bellotti; Geoff McKnight

doi:10.1117/12.2618122

27 May 2022 Curving of large-format infrared sensors

Mark R. O'Masta, Binh-Minh Nguyen, Alexander Gurga, Trevor Sasse, Brian Hempe, Christian Neuhaus, Eric C. Clough, Jacob Hundley, Pamela R. Patterson, James Jenkins, Mary Chen, Gregory Jacques, Scott Linton, Francisco Perez, Colin Van Ysseldyk, Esther Wang, Yan Tang, Kenta Niwa, Tobias Schaedler, Alexandros Kyrtsos, John Glennon, Andreu Glasmann, Enrico Bellotti, Geoff McKnight

Author Affiliations +

Proceedings Volume 12107, Infrared Technology and Applications XLVIII; 121071S (2022) https://doi.org/10.1117/12.2618122
Event: SPIE Defense + Commercial Sensing, 2022, Orlando, Florida, United States

Abstract

High resolution, wide field-of-view, infrared (IR) imagers find use in defense and civilian applications. The most demanding of them desire uniform sensitivity across an image’s field of view, while maintaining a small and light-weight optical design. These attributes can be achieved by curving of the focal plane array to reduce the need for field curvature correction. Using experimental and numerical methods, we investigated the spherical curving of hybridized arrays to demonstrate mechanical feasibility and opto-electronic performance. Each hybridized array comprised a 4k x 4k, 10 μm pixel pitch, midwave IR (MWIR) detector hybridized to a 67 mm diagonal fanout chip. We curve an array to 139.2 mm radius of curvature, resulting in a pixel area coverage of 0.086 sr. Measurements across the curved array revealed minimal variation in bandgap (<0.1 μm) and no appreciable difference in dark current.

Conference Presentation

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Mark R. O'Masta, Binh-Minh Nguyen, Alexander Gurga, Trevor Sasse, Brian Hempe, Christian Neuhaus, Eric C. Clough, Jacob Hundley, Pamela R. Patterson, James Jenkins, Mary Chen, Gregory Jacques, Scott Linton, Francisco Perez, Colin Van Ysseldyk, Esther Wang, Yan Tang, Kenta Niwa, Tobias Schaedler, Alexandros Kyrtsos, John Glennon, Andreu Glasmann, Enrico Bellotti, and Geoff McKnight "Curving of large-format infrared sensors", Proc. SPIE 12107, Infrared Technology and Applications XLVIII, 121071S (27 May 2022); https://doi.org/10.1117/12.2618122

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