TY - JOUR
T1 - Dual light field and polarization imaging using CMOS diffractive image sensors
AU - Jayasuriya, Suren
AU - Sivaramakrishnan, Sriram
AU - Chuang, Ellen
AU - Guruaribam, Debashree
AU - Wang, Albert
AU - Molnar, Alyosha
N1 - Publisher Copyright:
© 2015 Optical Society of America.
PY - 2015
Y1 - 2015
N2 - In this Letter we present, to the best of our knowledge, the first integrated CMOS image sensor that can simultaneously perform light field and polarization imaging without the use of external filters or additional optical elements. Previous work has shown how photodetectors with two stacks of integrated metal gratings above them (called angle sensitive pixels) diffract light in a Talbot pattern to capture four-dimensional light fields. We show, in addition to diffractive imaging, that these gratings polarize incoming light and characterize the response of these sensors to polarization and incidence angle. Finally, we show two applications of polarization imaging: imaging stress-induced birefringence and identifying specular reflections in scenes to improve light field algorithms for these scenes.
AB - In this Letter we present, to the best of our knowledge, the first integrated CMOS image sensor that can simultaneously perform light field and polarization imaging without the use of external filters or additional optical elements. Previous work has shown how photodetectors with two stacks of integrated metal gratings above them (called angle sensitive pixels) diffract light in a Talbot pattern to capture four-dimensional light fields. We show, in addition to diffractive imaging, that these gratings polarize incoming light and characterize the response of these sensors to polarization and incidence angle. Finally, we show two applications of polarization imaging: imaging stress-induced birefringence and identifying specular reflections in scenes to improve light field algorithms for these scenes.
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U2 - 10.1364/OL.40.002433
DO - 10.1364/OL.40.002433
M3 - Article
C2 - 26393758
AN - SCOPUS:84981344700
SN - 0146-9592
VL - 40
SP - 2433
EP - 2436
JO - Optics Letters
JF - Optics Letters
IS - 10
ER -