Research Notes
Dependence of the ray transference of model eyes on the frequency of light
Submitted: 13 August 2015 | Published: 30 June 2016
About the author(s)
Tanya Evans, Department of Optometry, University of Johannesburg, South AfricaWilliam F. Harris, Department of Optometry, University of Johannesburg, South Africa
Abstract
The transference defines the first-order character of an optical system; almost all the system’s optical properties can be calculated from it. It is useful, therefore, to have some idea of how it depends on the frequency of light. We examine the dependence for two Gaussian eyes. It turns out to be nearly linear for all four fundamental properties. The result is an equation for the dependence of the transference on frequency which is almost symplectic. We also transform the transference into Hamiltonian space, obtain equations for the least-squares straight line for the three independent transformed properties and map them back to the group of transferences. The result is an equation for the dependence of the transference on frequency which is exactly symplectic and therefore representative of an optical system. The results may approximate those of real eyes and give estimates of the dependence of almost all optical properties on frequency.
Keywords: ray transference; frequency; symplecticity
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Crossref Citations
1. Linear optics of the eye and optical systems: a review of methods and applications
Tanya Evans, Alan Rubin
BMJ Open Ophthalmology vol: 7 issue: 1 first page: e000932 year: 2022
doi: 10.1136/bmjophth-2021-000932