Analysis on Refractive Property of Complex Optometry System

Abstract:

In optometry, simplified models are usually used to analyze refractive property of optometry system on the assumption that lenses are thin and close enough to each other. However, in fact those lenses do have stated center thickness and lens space between them. The simplified models are not suitable for accurate analysis and system design. In this paper, first, accurate mathematic model for refractive property of single spherical and cylindrical lens is established. Next, accurate model is established for complex optometry system with different kinds of lenses combination. Then, influence factors such as lens structural parameter, lens space and lens position are analyzed for refractive property. Results show that correct lens position is very important for complex optometry system. Parallel light should pass lower power lens first and then higher power lens. When lens power and lens space gets bigger the influence of lens space will be more significant on refractive property. For uncertainty component, uncertainty from front and back surface radii are the biggest, secondary is the refractive index and lens space, and uncertainty from lens thickness is the least.

• Periodical: Applied Mechanics and Materials (Volumes 668-669)
• Pages: 1565-1568
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.668-669.1565
• Online since: October 2014
• Authors: Ji Yan Zhang*, Wen Li Liu, Lei Yang, Ming Liang Gao
• Keywords: Cylindrical Lens, Dioptric Power, Ophthalmology, Optometry System, Refractive Property, Spherical Lens

References

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