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Absolute linearity measurements on goldblack-coated pyroelectric detectors.

Theocharous, E (2008) Absolute linearity measurements on goldblack-coated pyroelectric detectors. In: Proceedings of NEWRAD 2008 Conference, 2008.

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Abstract

The non-linearity characteristics of goldblack-coated DLATGS and LiTaO3 pyroelectric detectors were experimentally investigated using the NPL detector linearity characterization facility. All detectors evaluated were shown to exhibit a super-linear response at high levels of illumination. Moreover, the linearity factor was shown to be a function of the area of the spot on the detector active area being illuminated, i.e. a function of the incident irradiance. Possible reasons for the observed behaviour are proposed and discussed. The temperature coefficient of response of the DLATGS pyroelectric detector was measured and found to be higher than +2.5% oC-1. This large and positive temperature coefficient of response is the most likely cause of the super-linear behaviour of the DLATGS pyroelectric detector. A similar argument applies to goldblack-coated LiTaO3 pyroelectric detectors.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: Optical Radiation and Photonics
Optical Radiation and Photonics > Radiometry and Detectors
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/5205

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