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Article information
2016 , Volume 21, ¹ 1, p.60-69
Gromilin G.I., Ivanov V.A., Kosykh V.P., Popov S.A.
Specific features of scanning with FPA in time delay integration mode
Sampling frequency of images formed by scanners based on 1-D focal plane arrays (FPA) of photosensitive elements is bounded by step between elements in direction, orthogonal to the direction of scanning. Use of several parallel arrays, shifted across scanning direction, removes this disadvantage, but it could lead to the appearance of new artefacts in the sampled images formed by such scanner. It is important to study these artefacts and ways of their elimination before implementation of the scanner hardware. A simulation model of the scanner on the basis of multi-row photodetector (PD), applied to the operational mode with time delay and integration (TDI) has been developed. Its components (optical channel model, multiple-row FPA model and scanning unit model) provide the fundamental properties of device components dealing with optical PSF and radial distortion, frequency response and nonlinearity of electronic channel, position, size and photosensitive elements interaction, FPA orientation and scanning direction, sampling rate and scanning velocity. Developed model allows investigating impact of these properties on the quality of formed images. Critical values of distortion, angle between scanning and TDI directions, and scanning velocity deviation from nominal are estimated analytically and by modelling in the paper. It is shown, that multiple-row FPA produces stronger requirements to optical distortion, consistency of scanning velocity and sampling rate, alignment directions of scanning TDI channels. Special attention is addressed to forming of “point” and “line” objects images.
[full text]
Keywords: scanner, simulation model, focal plane array, time delay integration, point spread function
Author(s):
Gromilin Gennadiy Ivanovich
Position: General Expert
Office: Institute Automation and Electrometry SB RAS
Address: 630090, Russia, Novosibirsk, 1, Academician Koptyug prosp.,
Phone Office: (383) 330 83 55
E-mail: gromilin@iae.nsk.su
SPIN-code: 9052-3496Ivanov Vladimir Alekseevich
PhD.
Position: Senior Research Scientist
Office: Institute Automation and Electrometry SB RAS
Address: 630090, Russia, Novosibirsk, 1, Academician Koptyug prosp.,
Phone Office: (383) 330 83 55
E-mail: vaivanov@iae.nsk.su
Kosykh Valeriy Petrovich
PhD.
Position: Head of Laboratory
Office: Institute Automation and Electrometry SB RAS
Address: 630090, Russia, Novosibirsk, 1, Academician Koptyug prosp.,
Phone Office: (383) 330 83 55
E-mail: kosych@iae.nsk.su
SPIN-code: 6144-1243Popov Sergei Anatolevich
Position: Programmer
Office: Institute Automation and Electrometry SB RAS
Address: 630090, Russia, Novosibirsk, 1, Academician Koptyug prosp.,
Phone Office: (383) 330 83 55
E-mail: kosych@iae.nsk.su
References:
[1] Martin,R.J., Riley, G.E. Time Division Multiplexed Time Delay Integration. Proc. SPIE 0930, Infrared Detectors and Arrays, 26 (August 15, 1988); doi:10.1117/12.946625.
[2] Bochkov,V. D., Drazhnikov,B. N., Kyznetsov,P. A., Kozlov,K. V., Solyakov,V. N. Temporal and dimensional data conversion of TDI infrared photodetector. Applied Physics. 2014; (1):58–61 (In Russ.)
[3] Kuznetsov,P.A., Moshchev,I.S., Salo,V.V., and Koshantsev,N.F. Photodetecting TDI modules for Earth surface monitoring in IR range. Advances in Applied Physics. 2014; 2(2):635–638 (In Russ.)
[4] Solyakov,V.N., Kozlov,K.V., Kyznetsov,P.A. Computer model of point target detection by FPA with time delay integration. Applied Physics. 2014; (2):54–57 (In Russ.)
[5] Kozlov,K.V., Solyakov,V.N., Kyznetsov,P.A., Polessky,A.V., Khamidullin,K.A., Semenchenko,N.A., and Bedareva,E.A. Mathematical model of TDI FPA. Advances in Applied Physics. 2014; 2(5):528–538 (In Russ.)
[6] Solyakov,V.N., Drazhnikov,B.N., Khamidullin,K.A., Lazarev,P.S. Point sources registration by TDI FPA. Advances in Applied Physics. 2013; 1(4):506–509 (In Russ.)
[7] Kirichuk,V.S., Kosykh,V.P., Popov,S.A. and Sinel’shchikov,V.V. Suppression of a Quasi-Stationary background in a Sequence of Images. Optoelectronics, Instrumentation and Data Processing. 2014; 50(2):109–117 (In Russ.)
Bibliography link:
Gromilin G.I., Ivanov V.A., Kosykh V.P., Popov S.A. Specific features of scanning with FPA in time delay integration mode // Computational technologies. 2016. V. 21. ¹ 1. P. 60-69
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