Linked Life Data

18566639

Source:http://linkedlifedata.com/resource/pubmed/id/18566639

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
18
pubmed:dateCreated
2008-6-20
pubmed:abstractText
The nonlinearity characteristics of a number of LiTaO3 pyroelectric detectors were experimentally investigated using the National Physical Laboratory (NPL) detector linearity characterization facility. All the detectors examined were shown to exhibit a superlinear response, i.e., the responsivity of the detectors increases as the incident radiant power increases. The temperature coefficient of response of some of these LiTaO3 pyroelectric detectors was measured and found to be approximately +0.2% degrees C(-1). The superlinear behavior of the LiTaO3 pyroelectric detectors was attributed to the positive temperature coefficient of response values of these detectors. Moreover, the linearity factor of gold-black-coated LiTaO3 pyroelectric detectors was shown to exhibit a dependency on the area of the spot illuminating the active area of the detector, i.e., on the incident irradiance. Possible reasons for the observed behavior are proposed and discussed. Some variations in the slopes of the plots of the linearity factor versus irradiance for different areas being illuminated have been assigned to the poor spatial uniformity of response of these detectors.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jun
pubmed:issn
0003-6935
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
47
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3397-405
pubmed:year
2008
pubmed:articleTitle
Absolute linearity measurements on LiTaO3 pyroelectric detectors.
pubmed:affiliation
Division of Quality of Life, National Physical Laboratory, Teddington, UK. e.theo@npl.co.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't