Fast Uncooled Low Density FPA of VPD PbSe for Applications in Hyperspectral Imagery.

摘要

Hyperspectral IR imagery requires specific infrared detectors able to provide images to high speed rates. Today, compliment the velocity of response requirement demand to use photonics which is synonymous of cooled and expensive detectors. Recently CIDA's group has processed the first uncooled and photonic detectors monolithically integrated with its ROIC of VPD PbSe. Using a new method of manufacturing PbSe, in 2007 a low density (16x16 FPA, 200 m pitch with DPS concept) was processed. Today it is available an upgraded version of 32x32 elements with a pixel pitch of 135 m. The detector is photonic, uncooled and MWIR sensitive. It means affordability and high speed rates and suitable for hyperspectral applications. Remarkable progress has been made improving some technological steps and developing tools for processing high signal rates. In this work, low resolution IR images taken up to 20 Kfps with a real uncooled device are shown. These results represent a technological breakthrough and allocate the VPD PbSe technology among the major players within the domain of uncooled IR FPAs. The number of applications is huge, some of them specifically related to hyperspectral imagery in the MWIR band.