Pupil tracking optical coherence tomography for precise control of pupil entry position

Oscar Carrasco-Zevallos, Derek Nankivil, Brenton Keller, Christian Viehland, Brandon Lujan, Joseph A. Izatt

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

To maximize the collection efficiency of back-scattered light, and to minimize aberrations and vignetting, the lateral position of the scan pivot of an optical coherence tomography (OCT) retinal scanner should be imaged to the center of the ocular pupil. Additionally, several retinal structures including Henle’s Fiber Layer (HFL) exhibit reflectivities that depend on illumination angle, which can be controlled by varying the pupil entry position of the OCT beam. In this work, we describe an automated method for controlling the lateral pupil entry position in retinal OCT by utilizing pupil tracking in conjunction with a 2D fast steering mirror placed conjugate to the retinal plane. We demonstrate that pupil tracking prevents lateral motion artifacts from impeding desired pupil entry locations, and enables precise pupil entry positioning and therefore control of the illumination angle of incidence at the retinal plane. We use our prototype pupil tracking OCT system to directly visualize the obliquely oriented HFL.

Original languageEnglish (US)
Article numberA032
Pages (from-to)3405-3419
Number of pages15
JournalBiomedical Optics Express
Volume6
Issue number9
DOIs
StatePublished - 2015
Externally publishedYes

Fingerprint

optical tracking
Optical Coherence Tomography
pupils
Pupil
entry
tomography
Lighting
illumination
vignetting
pivots
fibers
Artifacts
scanners
positioning
artifacts
aberration
incidence
prototypes
mirrors
reflectance

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Biotechnology

Cite this

Carrasco-Zevallos, O., Nankivil, D., Keller, B., Viehland, C., Lujan, B., & Izatt, J. A. (2015). Pupil tracking optical coherence tomography for precise control of pupil entry position. Biomedical Optics Express, 6(9), 3405-3419. [A032]. https://doi.org/10.1364/BOE.6.003405

Pupil tracking optical coherence tomography for precise control of pupil entry position. / Carrasco-Zevallos, Oscar; Nankivil, Derek; Keller, Brenton; Viehland, Christian; Lujan, Brandon; Izatt, Joseph A.

In: Biomedical Optics Express, Vol. 6, No. 9, A032, 2015, p. 3405-3419.

Research output: Contribution to journalArticle

Carrasco-Zevallos, O, Nankivil, D, Keller, B, Viehland, C, Lujan, B & Izatt, JA 2015, 'Pupil tracking optical coherence tomography for precise control of pupil entry position', Biomedical Optics Express, vol. 6, no. 9, A032, pp. 3405-3419. https://doi.org/10.1364/BOE.6.003405
Carrasco-Zevallos, Oscar ; Nankivil, Derek ; Keller, Brenton ; Viehland, Christian ; Lujan, Brandon ; Izatt, Joseph A. / Pupil tracking optical coherence tomography for precise control of pupil entry position. In: Biomedical Optics Express. 2015 ; Vol. 6, No. 9. pp. 3405-3419.
@article{3f73ccb8700d42e2933e92a6d1d99c22,
title = "Pupil tracking optical coherence tomography for precise control of pupil entry position",
abstract = "To maximize the collection efficiency of back-scattered light, and to minimize aberrations and vignetting, the lateral position of the scan pivot of an optical coherence tomography (OCT) retinal scanner should be imaged to the center of the ocular pupil. Additionally, several retinal structures including Henle’s Fiber Layer (HFL) exhibit reflectivities that depend on illumination angle, which can be controlled by varying the pupil entry position of the OCT beam. In this work, we describe an automated method for controlling the lateral pupil entry position in retinal OCT by utilizing pupil tracking in conjunction with a 2D fast steering mirror placed conjugate to the retinal plane. We demonstrate that pupil tracking prevents lateral motion artifacts from impeding desired pupil entry locations, and enables precise pupil entry positioning and therefore control of the illumination angle of incidence at the retinal plane. We use our prototype pupil tracking OCT system to directly visualize the obliquely oriented HFL.",
author = "Oscar Carrasco-Zevallos and Derek Nankivil and Brenton Keller and Christian Viehland and Brandon Lujan and Izatt, {Joseph A.}",
year = "2015",
doi = "10.1364/BOE.6.003405",
language = "English (US)",
volume = "6",
pages = "3405--3419",
journal = "Biomedical Optics Express",
issn = "2156-7085",
publisher = "The Optical Society",
number = "9",

}

TY - JOUR

T1 - Pupil tracking optical coherence tomography for precise control of pupil entry position

AU - Carrasco-Zevallos, Oscar

AU - Nankivil, Derek

AU - Keller, Brenton

AU - Viehland, Christian

AU - Lujan, Brandon

AU - Izatt, Joseph A.

PY - 2015

Y1 - 2015

N2 - To maximize the collection efficiency of back-scattered light, and to minimize aberrations and vignetting, the lateral position of the scan pivot of an optical coherence tomography (OCT) retinal scanner should be imaged to the center of the ocular pupil. Additionally, several retinal structures including Henle’s Fiber Layer (HFL) exhibit reflectivities that depend on illumination angle, which can be controlled by varying the pupil entry position of the OCT beam. In this work, we describe an automated method for controlling the lateral pupil entry position in retinal OCT by utilizing pupil tracking in conjunction with a 2D fast steering mirror placed conjugate to the retinal plane. We demonstrate that pupil tracking prevents lateral motion artifacts from impeding desired pupil entry locations, and enables precise pupil entry positioning and therefore control of the illumination angle of incidence at the retinal plane. We use our prototype pupil tracking OCT system to directly visualize the obliquely oriented HFL.

AB - To maximize the collection efficiency of back-scattered light, and to minimize aberrations and vignetting, the lateral position of the scan pivot of an optical coherence tomography (OCT) retinal scanner should be imaged to the center of the ocular pupil. Additionally, several retinal structures including Henle’s Fiber Layer (HFL) exhibit reflectivities that depend on illumination angle, which can be controlled by varying the pupil entry position of the OCT beam. In this work, we describe an automated method for controlling the lateral pupil entry position in retinal OCT by utilizing pupil tracking in conjunction with a 2D fast steering mirror placed conjugate to the retinal plane. We demonstrate that pupil tracking prevents lateral motion artifacts from impeding desired pupil entry locations, and enables precise pupil entry positioning and therefore control of the illumination angle of incidence at the retinal plane. We use our prototype pupil tracking OCT system to directly visualize the obliquely oriented HFL.

UR - http://www.scopus.com/inward/record.url?scp=84948739486&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84948739486&partnerID=8YFLogxK

U2 - 10.1364/BOE.6.003405

DO - 10.1364/BOE.6.003405

M3 - Article

AN - SCOPUS:84948739486

VL - 6

SP - 3405

EP - 3419

JO - Biomedical Optics Express

JF - Biomedical Optics Express

SN - 2156-7085

IS - 9

M1 - A032

ER -