scholarly journals Radiation Model of a Housing of Cooled Infrared Detector Array

2021 ◽  
Vol 25 (4) ◽  
pp. 67-76
Author(s):  
Tomasz Sosnowski ◽  
Grzegorz Bieszczad ◽  
Sławomir Gogler ◽  
Henryk Madura ◽  
Mariusz Felczak ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Infrared Detectors ◽  
Infrared Detector ◽  
Radiation Detection ◽  
Infrared Camera ◽  
Electrical Signal ◽  
Main Element ◽  
Radiation Model ◽  
Radiation Sources ◽  
Infrared Detector Array

The infrared camera detects infrared radiation from the observed objects, Its main element is the array of infrared detectors, which converts the received radiation into an electrical signal. The radiation sources recorded by the detector can be divided as useful, received from the observed scene, and useless received from such objects as the detector housing and lens elements. These unusable radiation sources have a significant impact on the design of the detector itself. The article presents a model of the detector housing and a quantitative analysis of the influence of various radiation sources on the effectiveness of radiation detection from the observed scene.

Simultaneous-integrated evaluation of mechanical–thermal sensory attributes of woven fabrics in considering practical wearing states

2021 ◽  
pp. 004051752110199
Author(s):  
Ling Liu ◽  
Li Wei ◽  
Fengxin Sun
Keyword(s):  
Thermal Property ◽  
Comprehensive Evaluation ◽  
Thermal Sensation ◽  
Infrared Detector ◽  
Woven Fabrics ◽  
Infrared Transmission ◽  
Touch Sensation ◽  
Application Requirements ◽  
Infrared Detector Array ◽  
Tactile Sensations

Tactile sensations of fabrics are the primary property determining the wearing comfort of clothing; however, comprehensive evaluation of the fabric tactile property by considering the flexural buckling of fabrics under high curvature, hysteresis performance and thermal property has not been fully studied, leading to a clear gap between the existing measurement methods and application requirements. Herein, a simultaneous-integrated testing method, namely the Touch Sensation Tester for Fabrics (TST-F) was introduced to evaluate the mechanical–thermal sensory properties of woven fabrics. The introduced instrument used one device with a single mechanical sensor to test various mechanical properties by constructing different deformations of fabrics, and the thermal property was simultaneously measured using an infrared detector array, achieving an efficient characterization of the mechanical–thermal sensation properties of textiles. The measurement capacity and repeatability of the TST-F were statistically analyzed; the measurement indices and their relation with fabric mechanical–thermal sensation properties were also exhibited. Results showed that the TST-F was promising to characterize fabric touch sensations in terms of bending stiffness, compression softness with wrinkling, stretching tightness and thermal comfort by considering the infrared transmission and heat conductivity of textiles.

Monolithically integrated near-infrared and mid-infrared detector array for spectral imaging

2007 ◽  
Vol 50 (2-3) ◽  
pp. 211-216 ◽  
Author(s):  
S.V. Bandara ◽  
S.D. Gunapala ◽  
D.Z. Ting ◽  
J.K. Liu ◽  
C.J. Hill ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Detector ◽  
Spectral Imaging ◽  
Detector Array ◽  
Mid Infrared ◽  
Monolithically Integrated ◽  
Infrared Detector Array

scholarly journals Real-time human identification using a pyroelectric infrared detector array and hidden Markov models

2006 ◽  
Vol 14 (15) ◽  
pp. 6643 ◽  
Author(s):  
Jian-Shuen Fang ◽  
Qi Hao ◽  
David J. Brady ◽  
Bob D. Guenther ◽  
Ken Y. Hsu
Keyword(s):  
Hidden Markov Models ◽  
Real Time ◽  
Markov Models ◽  
Hidden Markov ◽  
Infrared Detector ◽  
Human Identification ◽  
Detector Array ◽  
Infrared Detector Array

Monolithically integrated near-infrared and mid-infrared detector array

2005 ◽  
Author(s):  
S. V. Bandara ◽  
S. D. Gunapala ◽  
D Z. Ting ◽  
J. K. Liu ◽  
C. J. Hill ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Detector ◽  
Detector Array ◽  
Mid Infrared ◽  
Monolithically Integrated ◽  
Infrared Detector Array

Test methodologies for linear longwave infrared detector array production

1995 ◽  
Author(s):  
Samuel C. H. Wang ◽  
Gregg K. Dudoff ◽  
John Roussis ◽  
John M. Swab ◽  
Michael L. Winn ◽  
...  
Keyword(s):  
Infrared Detector ◽  
Detector Array ◽  
Infrared Detector Array ◽  
Array Production

Fabrication of Infrared Detector Based on of Polyaniline/Polyvinylidene Fluoride Blend Films and their Pyroelectric Measurement

2014 ◽  
Vol 605 ◽  
pp. 103-106 ◽  
Author(s):  
A.M. El-Shaer ◽  
A.K. Aboulseoud ◽  
M. Soliman ◽  
Sh. Ebrahim
Keyword(s):  
Electrical Conductivity ◽  
Polyvinylidene Fluoride ◽  
Infrared Detector ◽  
Polymeric Materials ◽  
Electrical Signal ◽  
Pyroelectric Coefficient ◽  
Low Noise ◽  
Output Resistance ◽  
Blend Films ◽  
High Output Impedance

Infrared detection based on polymeric materials is continuously developed in order to be cheap and easy to processing and also having high pyroelectric coefficient to convert heat to electrical signal. PANI/DBSA was blended with polyvinylidene fluoride (PVDF) with different weight ratios to improve pyroelectric coefficient and electrical conductivity of PVDF. The temperature dependence of the electrical conductivity is measured in the range of 20-100 °C It was found that the pyroelectric coefficient increased from 1.5×10-8 C/m2 °C for pristine PVDF to 2.61×10-5 C/m2 °C at 25 wt.% PANI at 30 °C. The infrared detector circuit connected to the gate of a voltage follower JFET with high input impedance was designed to convert the high output impedance of the sensor into the output resistance. The output from the sensor and JFET is amplified in two stages of operational amplifier with high voltage gain with low noise.

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