The Institute of Optical Sensor Systems (OS) at the Robotics and Mechatronics Center of the German Aerospace Center (DLR) has more than 40 years of experience in high-resolution imaging and imaging technology. This paper presents the current status of the institute’s work on next-generation CMOS-TDI detector development. Together with the partners IHP (Leibniz Institute for High Performance Microelectronics), IMS (Fraunhofer Institute for Microelectronic Circuits and Systems), and JOP (Jena-Optronik GmbH), a new test detector was designed consisting of an embedded charge-coupled device (eCCD) and a readout integrated circuit (ROIC), combined as a silicon-bonded design. This approach enables operation at a line rate up to 150 kHz and a full well capacity above 150 ke-, thus making it very promising for high-spatial-resolution imaging systems. An FPGA-based engineering model environment with high design flexibility distributes all eCCD clocking and ROIC control signals. The unidirectional eCCD design is optimized for electrical charge injection tests and is used to verify in-orbit initialization approaches, including eCCD signal reconstruction. The paper will outline this procedure. Due to the accessible detector building blocks, this setup is ideally suited for future evaluation and verification of accumulative radiation effects on the eCCD and ROIC structures and determining possible corrective actions to contain overall radiation-related performance degradation over the mission lifetime. The evaluated method is intended to estimate the sensor’s behavior under space environmental conditions during the entire mission by introducing a detector initialization phase.
The Institute of Optical Sensor Systems (OS) at the Robotics and Mechatronics Center of the German Aerospace Center (DLR) has more than 35 years of experience with high-resolution imaging technology. This paper shows the institutes scientific results of the next generation of CMOS detector design in a TDI (Time Delay and Integration) architecture. This project includes the technological design of future high or multispectral resolution space-borne instruments and the possibility of higher integration. First results where published by Eckardt, et al. (1 ) 2013 and (2 ) 2014. DLR OS and the Fraunhofer Institute for Microelectronic Circuits and Systems in Duisburg were driving the technology of new detectors for future high resolution projects and hybridization capability in order to keep pace with the ambitious scientific and user requirements. In combination with the engineering research, the current generation of space borne sensor systems is focusing on VIS/NIR high spectral resolution to meet the requirements on earth and planetary observation systems. The combination of large swath and high-spectral resolution with intelligent synchronization control, fast-readout ADC chains and new focal-plane concepts open the door to new remote-sensing and smart deep-space instruments. The paper gives an overview over the DLR detector development and verification program on FPA level. New control possibilities for CMOS-TDI NGdetectors in synchronization control mode, and key parameters like linearity, PTC, cross talk and control effort will be discussed in detail.
The Institute of Optical Sensor Systems (OS) at the Robotics and Mechatronics Center of the German Aerospace Center
(DLR) has more than 30 years of experience with high-resolution imaging technology. This paper shows the institute’s
scientific results of the leading-edge detector design CMOS in a TDI (Time Delay and Integration) architecture. This
project includes the technological design of future high or multi-spectral resolution spaceborne instruments and the
possibility of higher integration. DLR OS and the Fraunhofer Institute for Microelectronic Circuits and Systems (IMS) in
Duisburg were driving the technology of new detectors and the FPA design for future projects, new manufacturing
accuracy and on-chip processing capability in order to keep pace with the ambitious scientific and user requirements. In
combination with the engineering research, the current generation of space borne sensor systems is focusing on VIS/NIR
high spectral resolution to meet the requirements on earth and planetary observation systems. The combination of large-swath
and high-spectral resolution with intelligent synchronization control, fast-readout ADC (analog digital converter)
chains and new focal-plane concepts opens the door to new remote-sensing and smart deep-space instruments. The paper
gives an overview of the detector development status and verification program at DLR, as well as of new control
possibilities for CMOS-TDI detectors in synchronization control mode.
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