A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics

Xiaojin Zhao; Amine Bermak; Farid Boussaid

doi:10.1007/978-3-642-32770-4_1

A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics

Xiaojin Zhao^*, Amine Bermak, Farid Boussaid

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

In this chapter, 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 micropolarizer array technology exploiting "guest-host" interactions in liquid crystals for visible imaging polarimetry. The proposed technology enables the fabrication of high resolution (5μm x 5μm pixel pitch) micropolarizer arrays with submicron thickness (0.95μm) to provide for larger light collection angles and reduced optical cross-talk. With the "host" nematic liquid crystal molecules photo-aligned by sulfonic azo-dye SD1, we report averaged major principal transmittance and polarization efficiency (PE) of 80.3% and 0.863, respectively across the 400nm - 700nm visible spectrum range. The proposed fabrication technology is simple and cost-effective, requiring only a single ultraviolet-exposure of the spin-coated "guest-host" mixture through a "photoalignment master".

Original language	English
Title of host publication	VLSI-SoC
Subtitle of host publication	Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers
Pages	1-9
Number of pages	9
DOIs	https://doi.org/10.1007/978-3-642-32770-4_1
Publication status	Published - 2012
Externally published	Yes
Event	19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011 - Hong Kong, China Duration: 3 Oct 2011 → 5 Oct 2011

Publication series

Name	IFIP Advances in Information and Communication Technology
Volume	379 AICT
ISSN (Print)	1868-4238

Conference

Conference	19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011
Country/Territory	China
City	Hong Kong
Period	3/10/11 → 5/10/11

Keywords

Polarimetric ophthalmoscope
micropolarizer array
polarimetric imaging

Access to Document

10.1007/978-3-642-32770-4_1

Cite this

Zhao, X., Bermak, A., & Boussaid, F. (2012). A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. In VLSI-SoC: Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers (pp. 1-9). (IFIP Advances in Information and Communication Technology; Vol. 379 AICT). https://doi.org/10.1007/978-3-642-32770-4_1

Zhao, Xiaojin ; Bermak, Amine ; Boussaid, Farid. / A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. VLSI-SoC: Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers. 2012. pp. 1-9 (IFIP Advances in Information and Communication Technology).

@inproceedings{b8d75e4164bf43a294e83db824a02ffc,

title = "A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics",

abstract = "In this chapter, 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 micropolarizer array technology exploiting {"}guest-host{"} interactions in liquid crystals for visible imaging polarimetry. The proposed technology enables the fabrication of high resolution (5μm x 5μm pixel pitch) micropolarizer arrays with submicron thickness (0.95μm) to provide for larger light collection angles and reduced optical cross-talk. With the {"}host{"} nematic liquid crystal molecules photo-aligned by sulfonic azo-dye SD1, we report averaged major principal transmittance and polarization efficiency (PE) of 80.3% and 0.863, respectively across the 400nm - 700nm visible spectrum range. The proposed fabrication technology is simple and cost-effective, requiring only a single ultraviolet-exposure of the spin-coated {"}guest-host{"} mixture through a {"}photoalignment master{"}.",

keywords = "Polarimetric ophthalmoscope, micropolarizer array, polarimetric imaging",

author = "Xiaojin Zhao and Amine Bermak and Farid Boussaid",

year = "2012",

doi = "10.1007/978-3-642-32770-4_1",

language = "English",

isbn = "9783642327698",

series = "IFIP Advances in Information and Communication Technology",

pages = "1--9",

booktitle = "VLSI-SoC",

note = "19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011 ; Conference date: 03-10-2011 Through 05-10-2011",

}

Zhao, X, Bermak, A & Boussaid, F 2012, A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. in VLSI-SoC: Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers. IFIP Advances in Information and Communication Technology, vol. 379 AICT, pp. 1-9, 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Hong Kong, China, 3/10/11. https://doi.org/10.1007/978-3-642-32770-4_1

A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. / Zhao, Xiaojin; Bermak, Amine; Boussaid, Farid.
VLSI-SoC: Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers. 2012. p. 1-9 (IFIP Advances in Information and Communication Technology; Vol. 379 AICT).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics

AU - Zhao, Xiaojin

AU - Bermak, Amine

AU - Boussaid, Farid

PY - 2012

Y1 - 2012

N2 - In this chapter, 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 micropolarizer array technology exploiting "guest-host" interactions in liquid crystals for visible imaging polarimetry. The proposed technology enables the fabrication of high resolution (5μm x 5μm pixel pitch) micropolarizer arrays with submicron thickness (0.95μm) to provide for larger light collection angles and reduced optical cross-talk. With the "host" nematic liquid crystal molecules photo-aligned by sulfonic azo-dye SD1, we report averaged major principal transmittance and polarization efficiency (PE) of 80.3% and 0.863, respectively across the 400nm - 700nm visible spectrum range. The proposed fabrication technology is simple and cost-effective, requiring only a single ultraviolet-exposure of the spin-coated "guest-host" mixture through a "photoalignment master".

AB - In this chapter, 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 micropolarizer array technology exploiting "guest-host" interactions in liquid crystals for visible imaging polarimetry. The proposed technology enables the fabrication of high resolution (5μm x 5μm pixel pitch) micropolarizer arrays with submicron thickness (0.95μm) to provide for larger light collection angles and reduced optical cross-talk. With the "host" nematic liquid crystal molecules photo-aligned by sulfonic azo-dye SD1, we report averaged major principal transmittance and polarization efficiency (PE) of 80.3% and 0.863, respectively across the 400nm - 700nm visible spectrum range. The proposed fabrication technology is simple and cost-effective, requiring only a single ultraviolet-exposure of the spin-coated "guest-host" mixture through a "photoalignment master".

KW - Polarimetric ophthalmoscope

KW - micropolarizer array

KW - polarimetric imaging

UR - http://www.scopus.com/inward/record.url?scp=84870674591&partnerID=8YFLogxK

U2 - 10.1007/978-3-642-32770-4_1

DO - 10.1007/978-3-642-32770-4_1

M3 - Conference contribution

AN - SCOPUS:84870674591

SN - 9783642327698

T3 - IFIP Advances in Information and Communication Technology

SP - 1

EP - 9

BT - VLSI-SoC

T2 - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011

Y2 - 3 October 2011 through 5 October 2011

ER -

Zhao X, Bermak A, Boussaid F. A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics. In VLSI-SoC: Advanced Research for Systems on Chip - 19th IFIP WG 10.5/IEEE International Conference on Very Large Scale Integration, VLSI-SoC 2011, Revised Selected Papers. 2012. p. 1-9. (IFIP Advances in Information and Communication Technology). doi: 10.1007/978-3-642-32770-4_1

A low cost CMOS polarimetric ophthalmoscope scheme for cerebral malaria diagnostics

Abstract

Publication series

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Cite this