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首页> 外文会议>Fifth International Conference on Optical and Photonics Engineering >Geometric approach to the design of an imaging probe to evaluate the iridocorneal angle structures
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Geometric approach to the design of an imaging probe to evaluate the iridocorneal angle structures

机译：用于评估虹膜角膜角结构的成像探头设计的几何方法

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摘要

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.
机译：摄影成像方法可以追踪虹膜角膜角结构的解剖变化，并随时间监测治疗反应。在这项工作中，我们旨在设计一种成像探针，以使用几何光学来评估虹膜角膜角结构。我们首先使用斯涅尔定律对光从眼前房到外部介质的传播进行分析。随后采取一种策略，通过简化倾斜一定角度的LED的复杂非旋转对称辐照度分布来实现均匀的近场辐照度。该优化基于4个LED的成角度的圆环阵列（或2×2方形LED阵列）的几何设计考虑。设计方程式提供了有关可变参数的见解，例如LED的照明角度，环形阵列半径，LED的视角以及工作距离。然后选择具有足够分辨率以在所需工作距离下分辨虹膜角膜角度结构的微型彩色CCD摄像机。拟议的设计方面符合国际非电离辐射防护委员会建议的安全要求。

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  • 来源
  • 会议地点 Singapore(SG)
  • 作者

    Xun Jie Jeesmond Hong; V.K. Shinoj; V.M. Murukeshan; M. Baskaran; Tin Aung;

  • 作者单位

    Center for Optical and Laser Engineering , School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore 639798, Singapore;

    Center for Optical and Laser Engineering , School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore 639798, Singapore;

    Center for Optical and Laser Engineering , School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Singapore 639798, Singapore;

    Singapore Eye Research Institute and Singapore National Eye Center, Singapore, Singapore 168751, Singapore,Duke-NUS Medicine School, Singapore, Singapore 169857, Singapore;

    Singapore Eye Research Institute and Singapore National Eye Center, Singapore, Singapore 168751, Singapore,Duke-NUS Medicine School, Singapore, Singapore 169857, Singapore,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore 119228, Singapore;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Geometric optics; glaucoma; iridocorneal angle imaging; circular ring LED array;

    机译：几何光学；青光眼;虹膜角膜角成像圆环LED阵列;
  • 入库时间 2022-08-26 14:02:08

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