A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics

Xiaojin Zhao, Amine Bermak, Farid Boussaid

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publication2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011
Pages1-4
Number of pages4
DOIs
Publication statusPublished - 22 Dec 2011
Event2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011 - Kowloon, Hong Kong
Duration: 3 Oct 20115 Oct 2011

Publication series

Name2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011

Other

Other2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011
CountryHong Kong
CityKowloon
Period3/10/115/10/11

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ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

Zhao, X., Bermak, A., & Boussaid, F. (2011). A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. In 2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011 (pp. 1-4). [6081598] (2011 IEEE/IFIP 19th International Conference on VLSI and System-on-Chip, VLSI-SoC 2011). https://doi.org/10.1109/VLSISoC.2011.6081598