pp. 5189-5200
S&M3861 Research Paper of Special Issue https://doi.org/10.18494/SAM5115 Published: December 20, 2024 Optical Projection System Design for Both Distant and Near Eye Charts [PDF] Liang-Ying Huang, Yung-Fu Liu, Feng-Ming Yeh, Cheng-Hung Lai, Kuang-Lung Huang, Rong-Seng Chang, and Der-Chin Chen (Received April 30, 2024; Accepted October 31, 2024) Keywords: eye chart, vision examination, distant E chart
In this study, a digital eye chart optical projection system for distant and near vision examination was designed using the basic principle of geometric optics and a Snellen chart, which consists of four modules: an off-axis parabolic (OAP) mirror, a triplet lens, an liquid-crystal display (LCD), and a digital processing unit. Fifteen male subjects participated in the experiment, and their visual acuity data were recorded. The system shows the benefits of compactness, portability, and easy operation, in comparison with the traditional design. A detailed design process has been addressed in this paper.
Corresponding author: Liang-Ying HuangThis work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Liang-Ying Huang, Yung-Fu Liu, Feng-Ming Yeh, Cheng-Hung Lai, Kuang-Lung Huang, Rong-Seng Chang, and Der-Chin Chen, Optical Projection System Design for Both Distant and Near Eye Charts, Sens. Mater., Vol. 36, No. 12, 2024, p. 5189-5200. |