Research and Development of Uncooled Infrared Detectors
0
Citation
0
Reference
20
Related Paper
Abstract:
The latest research status of uncooled infrared detectors is reviewed. The infrared detectors are classified according to the different operation principle, and the merit of uncooled infrared detectors is particularly described. The typical detector structures are presented, compared and discussed. This paper describes the primary structures, technology and elementary indicators of several new detectors, and the development orientation of uncooled infrared detectors is predicted.Keywords:
Infrared detector
Cite
Infrared detector
Microbolometer
Noise-equivalent power
Cite
Citations (0)
Performance limits of infrared photon and thermal detectors are presented. Due to fundamental different types of noise, these two classes of detectors have different dependencies of detectivities on wavelength and temperature. Special attention is put on competition of QWIPs and HgCdTe photodiodes in long wavelength infrared spectral region. Final part of the paper is devoted to uncooled two-dimensional arrays of thermal detectors. Two most important detection mechanisms, namely, resistive bolometer and pyroelectric detectors are considered. The development of outstanding technical achievements in uncooled thermal imaging is also presented.
Resistive touchscreen
Photodiode
Infrared detector
Mercury cadmium telluride
Cite
Citations (3)
Focal Plane Arrays
Thermoelectric cooling
Infrared detector
Cite
Citations (0)
The comparison of uncooled thermal and deeply cooled QWIP (quantum well infrared photodetector) detectors are briefly presented. Different types of QWIP detectors have been mentioned. The limits of detectivity both for thermal and photon detectors are discussed.
Infrared detector
Cite
Citations (3)
Microbolometer
Dot pitch
Infrared detector
Cite
Citations (35)
Uncooled microbolometer infrared detectors are being developed for a wide range of thermal imaging applications. To design and manufacture high-performance microbolometer infrared detectors, numerical calculation and simulation is necessary. In this work, finite element methods are performed to simulate the transient temperature field of thermistor films of microbolometer infrared detectors. The varisized supporting legs' impacts on the performance of detectors are discussed. At the same time, variation of the bias voltage and the substrate temperature's impacts on total noise, noise equivalent to temperature difference (NETD) and detectivity (D*) are also discussed in details. These performance analyses are helpful for optimum design of microbolometer infrared detectors' structure and rational choice of working temperature of infrared focal plane arrays.
Microbolometer
Thermistor
Infrared detector
Cite
Citations (2)
Microbolometer
Infrared detector
Semiconductor detector
Cite
Citations (2)
Over the past several years, uncooled IR detectors and focal plane arrays have been rapidly developed. Impressive progress has been made in both resistive microbolometers and pyroelectric thin-film detectors with noise equivalent temperature differences projected to be 10 to 20 mK with F/1 optics for such structures. Noise equivalent temperature of 50 mK bulk pyroelectric detectors and thin film resistive microbolometers are already demonstrated and in production. Other novel schemes, such as bimaterial capacitors, are also promising for uncooled IR detection. The US Army Research Laboratory is involved in developing ferroelectric materials to take advantage of the pyroelectric properties. The goal is to develop crystal oriented thin films to further improve detector performance. In this presentation, the operating principle of resistive microbolometers and pyroelectric detectors, and recent progress of uncooled RI focal plane arrays are discussed. In addition, the uncooled RI detector program at the Army Research Laboratory, that includes research facilities for and research efforts toward uncooled detectors and focal plane arrays is presented.
Resistive touchscreen
Infrared detector
Large format
Noise-equivalent power
Operating temperature
Focal Plane Arrays
Cite
Citations (8)
The development of infrared technology is dependent on the advance of infrared detectors.By reason that test and evaluation of IRFPA is one of the key techniques during the development of infrared detectors,characteristic evaluation of uncooled infrared detectors is presented.Test for responsibility and NETD of uncooled infrared detectors is realized with Matlab GUI program and the result is analyzed.They are the fundamentals of research and development on thermal imager and have some guide effects.
Infrared detector
Thermal infrared
Cite
Citations (0)