350 rub
Journal Science Intensive Technologies №2 for 2010 г.
Article in number:
The study of the noise of the signal photocell matrix HGCDTE photodetector in different warm-up mode
Authors:
I. I. Kremis
Abstract:
Back grounded of experience work with matrix HgCdTe receiver of the different producers and miscellaneous receiver one producer has shown that behaviors receiver element sloppy. So, elements of the receiver manifesting themselves on scene as noisy or twinkling, in a certain time of the functioning the instrument can gain the parameters characteristic majority photocell of the receiver. Moreover under each new cycle of the cooling the receiver from 293 K before 77 K picture noisy element also changed. The pixels, which were shown "normal", under new frost began to clam our, you-doing from the general noise picture of the frame. The Similar situation existed with elements of the receiver having constant level of the signal (the non-sensitive elements) and with detector elements. The first can begin to feel (or on the contrary feeling-flesh elements stop feel), but the second change its sensitivity under each new cycle frost receiver. As a result called on studies receiver was shown that, exist the elements photodetector, noise which under the current enabling the instrument corresponds to the general noise background a majority element photodetector, but under new cycle frost their noise can vastly increase or decreasel Also, amount is noisy fault elements changes under each new cycle frost photodetector. It is recommended under each enabling the instrument to execute the nes cycle of the finding fault element. Moerover exist the fault elements which do not change their own parameter under new cycle-s frost. Their amount for explored photo-receiver forms from 6 % before 10 %. Keep the table fault elements in EPROM instrument introduces justified if nature and amount fault element will not depend on cycles frost photodetector. Finding fault element for explored receive,r follows to conduct under different temperature 10 C and 50 C. When work with photodetector new type, follows beforehand to value the dependency fzult elements from the temperature absolutely black body and from cycle-s frost. The quite a number element form the elements, seldom revealing as fault-once for 15 days. Also sharply stand out the fault elements, which reveal it daily. The Specified elements form the sharp contrast with element, revealing 4-13 once for 15 days.
Pages: 59-70
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