Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106941
Title: Geometric approach to the design of an imaging probe to evaluate the iridocorneal angle structures
Authors: Hong, Jesmond Xun Jie
Shinoj, Vengalathunadakal Kuttinarayanan
Murukeshan, Vadakke Matham
Baskaran, Mani
Aung, Tin
Keywords: Glaucoma
Geometric Optics
Engineering::Mechanical engineering
Issue Date: 2017
Source: Hong, J. X. J., Shinoj, V. K., Murukeshan, V. M., Baskaran, M., & Aung, T. (2017). Geometric approach to the design of an imaging probe to evaluate the iridocorneal angle structures. Proceedings of SPIE - International Conference on Optical and Photonics Engineering, 10449, 104490B-. doi:10.1117/12.2269161
Series/Report no.: Proceedings of SPIE - International Conference on Optical and Photonics Engineering
Abstract: Photographic imaging methods allow the tracking of anatomical changes in the iridocorneal angle structures and the monitoring of treatment responses overtime. In this work, we aim to design an imaging probe to evaluate the iridocorneal angle structures using geometrical optics. We first perform an analytical analysis on light propagation from the anterior chamber of the eye to the exterior medium using Snell’s law. This is followed by adopting a strategy to achieve uniform near field irradiance, by simplifying the complex non-rotational symmetric irradiance distribution of LEDs tilted at an angle. The optimization is based on the geometric design considerations of an angled circular ring array of 4 LEDs (or a 2 × 2 square LED array). The design equation give insights on variable parameters such as the illumination angle of the LEDs, ring array radius, viewing angle of the LEDs, and the working distance. A micro color CCD video camera that has sufficient resolution to resolve the iridocorneal angle structures at the required working distance is then chosen. The proposed design aspects fulfil the safety requirements recommended by the International Commission on Non-ionizing Radiation Protection.
URI: https://hdl.handle.net/10356/106941
http://hdl.handle.net/10220/49666
ISSN: 0277-786X
DOI: 10.1117/12.2269161
Rights: © 2017 SPIE. All rights reserved. This paper was published in Proceedings of SPIE - International Conference on Optical and Photonics Engineering and is made available with permission of SPIE.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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