NDLI: Study on refraction character of astigmatic optical system with matrix method

Content Provider	IEEE Xplore Digital Library
Author	Zhang Jiyan Liu Wenli
Copyright Year	2011
Description	Author affiliation: Division of Metrology in Ionizing Radiation and Medicine, National Institute of Metrology, Beijing 100013, China (Zhang Jiyan; Liu Wenli)
Abstract	In optometry and vision science, simplified models are usually used to analyze and calculate refraction character of astigmatic optical 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 single astigmatic-power lens is established with matrix method. Next, models are established for complicated astigmatic optical system. Then, comparison between accurate and simplified models is made by calculating the difference on dioptric power due to different position and lens space. Results show that when using astigmatic lens combination to test human vision parallel light should pass lower power lens first and then higher power lens, otherwise big error will be induced. Finally, uncertainty is evaluated and discussed for astigmatic optical system on the base of accurate mathematic models. Conclusion is that uncertain from front and back surface radii is the biggest, secondary is from refractive index and lens space, and uncertain from lens thickness is the least.
Starting Page	13
Ending Page	17
File Size	109474
Page Count	5
File Format	PDF
ISBN	9781424481583
e-ISBN	9781424481613
DOI	10.1109/ICEMI.2011.6037755
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	dioptric power Uncertainty Instruments Optical variables control Adaptive optics metrology Mathematical model Optical refraction matrix astigmatic optical system refraction character Lenses
Content Type	Text
Resource Type	Article

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