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Publication
CaracterizaĆ§Ć£o de sensor de imagem CMOS
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Authors
Abstract(s)
A constante evoluĆ§Ć£o da tecnologia possibilitou a utilizaĆ§Ć£o de sensores de
imagem, cada vez mais pequenos, nas mais variadas Ć”reas, desde os smartphones atĆ© Ć
anĆ”lise e seleĆ§Ć£o dos mais diferentes objetos na indĆŗstria.
A criaĆ§Ć£o de um sensor de imagem CMOS inclui duas fases fundamentais, o
design e a sua caracterizaĆ§Ć£o. Os sensores sĆ£o desenhados para corresponderem a um
certo tipo de caracterĆsticas, desejadas por um cliente ou derivadas das necessidades atuais
da indĆŗstria. A caracterizaĆ§Ć£o Ć© o processo de confirmaĆ§Ć£o que todas as caracterĆsticas
estĆ£o de acordo com o pretendido. Assim, o processo de caracterizaĆ§Ć£o toma um papel de
extrema importĆ¢ncia, pois deverĆ” ser o mais precisa possĆvel, e deve ser realizada atravĆ©s
de um procedimento standard para caracterizar o sensor de imagem.
Neste trabalho, sĆ£o descritos e calculados os parĆ¢metros definidos pelo standard
EMVA 1288, necessĆ”rios Ć caracterizaĆ§Ć£o de um sensor de imagem.
Assim, realizou-se tanto a caracterizaĆ§Ć£o do ADC como da luz utilizada, e para o
sensor de imagem ORION 2K, realizaram-se as mediƧƵes necessƔrias para a sua
caracterizaĆ§Ć£o, nomeadamente mediƧƵes com diferentes intensidades de luz, em
condiƧƵes de total ausĆŖncia de luz e tambĆ©m para diferentes tempos de exposiĆ§Ć£o. Esse
sensor foi analisado nas suas duas configuraƧƵes possĆveis, com pixĆ©is pequenos e com
pixƩis grandes.
Foi possĆvel chegar-se a todos os valores dos parĆ¢metros definidos pelo standard
EMVA 1288, tal como era como pretendido.
Para a realizaĆ§Ć£o deste trabalho utilizaram-se as instalaƧƵes da empresa ams
Portugal, situadas no Funchal. A empresa disponibilizou tambƩm todo o material
necessĆ”rio para se proceder Ć caracterizaĆ§Ć£o do sensor de imagem ORION 2K e tambĆ©m
algum software proprietƔrio necessƔrio para este trabalho.
The constant evolution of technology has made it possible to use smaller image sensors in the most varied areas, from smartphones to the analysis and selection of different industrial objects. The project of a CMOS image sensor includes two fundamental phases: the design and the characterization of the device. Sensors are designed to match a particular set of characteristics, chosen by a client or based on current industrial needs. The characterization is the process that confirms if all characteristics are in agreement with the intended objectives. Thus, the characterization process plays a significant role, as it must be as accurate as possible, requiring a standard procedure for the characterization of the image sensor. In this work, we have explored and calculated the parameters needed for the complete characterization of an image sensor using the standard EMVA 1288. Thus, both the ADC and light source characterization were performed, and all the necessary measurements were made for the characterization of the ORION 2K sensor, namely measurements with different light intensities, in total absence of light and also for different exposure times. This sensor was analysed in both possible configurations: with a small and with a large pixel. It was possible to determine all the values of the parameters defined by the EMVA 1288 standard, as it was intended. For this work, we used the facilities of ams Portugal, located in Funchal. The company provided all the necessary material to proceed with the ORION 2K image sensor characterization and also provided the required proprietary software, needed for this work.
The constant evolution of technology has made it possible to use smaller image sensors in the most varied areas, from smartphones to the analysis and selection of different industrial objects. The project of a CMOS image sensor includes two fundamental phases: the design and the characterization of the device. Sensors are designed to match a particular set of characteristics, chosen by a client or based on current industrial needs. The characterization is the process that confirms if all characteristics are in agreement with the intended objectives. Thus, the characterization process plays a significant role, as it must be as accurate as possible, requiring a standard procedure for the characterization of the image sensor. In this work, we have explored and calculated the parameters needed for the complete characterization of an image sensor using the standard EMVA 1288. Thus, both the ADC and light source characterization were performed, and all the necessary measurements were made for the characterization of the ORION 2K sensor, namely measurements with different light intensities, in total absence of light and also for different exposure times. This sensor was analysed in both possible configurations: with a small and with a large pixel. It was possible to determine all the values of the parameters defined by the EMVA 1288 standard, as it was intended. For this work, we used the facilities of ams Portugal, located in Funchal. The company provided all the necessary material to proceed with the ORION 2K image sensor characterization and also provided the required proprietary software, needed for this work.
Description
Keywords
Sensor de imagem CMOS CaracterizaĆ§Ć£o EMVA 1288 Luz ams Portugal Orion 2K Image sensor Characterization Light Engenharia EletrotĆ©cnica - TelecomunicaƧƵes . Faculdade de CiĆŖncias Exatas e da Engenharia