TY - GEN
T1 - A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics
AU - Zhao, Xiaojin
AU - Bermak, Amine
AU - Boussaid, Farid
PY - 2011
Y1 - 2011
N2 - In this paper, we present a low cost CMOS polarimetric ophthalmoscope scheme enabling the capture of the retinal abnormalities that are unique to cerebral malaria. The proposed technology, which can be integrated into cellphones, offers the basis for quick and non-invasive screening of cerebral malaria. In addition, we report a high quality micropolarizer array for the proposed polarimetric ophthalmoscope, exploiting "guest-host" interactions in liquid crystals. With dichroic azodye-1 (AD1) molecules as the "guest" and nematic liquid crystal (NLC) molecules as the "host", we demonstrate a better control of the molecular orientation of the "guest", which in turn results in a ∼25% increase of the major principal transmittance and a 139% increase of the peak extinction ratio. The proposed micropolarizer fabrication technology is simple and cost-effective, requiring only selective photo-patterning of a "guest-host" polymer spincoated over the image sensor.
AB - In this paper, we present a low cost CMOS polarimetric ophthalmoscope scheme enabling the capture of the retinal abnormalities that are unique to cerebral malaria. The proposed technology, which can be integrated into cellphones, offers the basis for quick and non-invasive screening of cerebral malaria. In addition, we report a high quality micropolarizer array for the proposed polarimetric ophthalmoscope, exploiting "guest-host" interactions in liquid crystals. With dichroic azodye-1 (AD1) molecules as the "guest" and nematic liquid crystal (NLC) molecules as the "host", we demonstrate a better control of the molecular orientation of the "guest", which in turn results in a ∼25% increase of the major principal transmittance and a 139% increase of the peak extinction ratio. The proposed micropolarizer fabrication technology is simple and cost-effective, requiring only selective photo-patterning of a "guest-host" polymer spincoated over the image sensor.
UR - http://www.scopus.com/inward/record.url?scp=83755163136&partnerID=8YFLogxK
U2 - 10.1109/VLSISoC.2011.6081598
DO - 10.1109/VLSISoC.2011.6081598
M3 - Conference contribution
AN - SCOPUS:83755163136
SN - 9781457701719
T3 - 2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011
SP - 1
EP - 4
BT - 2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011
T2 - 2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011
Y2 - 3 October 2011 through 5 October 2011
ER -