A Review Of Pyroelectric Detector Technology

Donald E. Marshall

doi:10.1117/12.956063

6 June 1978 A Review Of Pyroelectric Detector Technology

Donald E. Marshall

Proceedings Volume 0132, Utilization of Infrared Detectors; (1978) https://doi.org/10.1117/12.956063
Event: 1978 Los Angeles Technical Symposium, 1978, Los Angeles, United States

Abstract

Pyroelectric detectors offer the advantages of room temperature operation and wide spectral response. High performance requires good thermal design of the detector and its mounting structure to maximize low frequency responsivity and to minimize temperature noise. The intrinsic detector noise is caused by dielectric losses. In the crystalline ferroelectrics, such as Sr _0.5 Ba _0.5 Nb₂O₆ (SBN) and LiTaO3, dielectric loss tangents on the order of 0.0003 have been obtained and a intrinsic detector noise may be limited by material impurities. A low frequency D* of 2 x 10⁹ cm Hz /W has been measured for these materials. At these loss tangent values, temperature noise and preamplifier noise for both JFET and CCD amplifiers presently limit performance. Despite its lower pyroelectric coefficient, the polymer PVF₂ is a competitive pyroelectric material for detector arrays using CCD signal processors.

Citation Download Citation

Donald E. Marshall "A Review Of Pyroelectric Detector Technology", Proc. SPIE 0132, Utilization of Infrared Detectors, (6 June 1978); https://doi.org/10.1117/12.956063

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