Abstract
The change in curvature of a wave front by a lens can be considered in two stages: first the change as the wave front enters the lens and then the change as it leaves. Consider now the passage of a wave front from a medium of index µ p , where its radius of curvature is p, into a medium of index µ q , the boundary surface itself having radius of curvature r (Figure 29.01). Let the equations of the incident wave front and of the lens be
and
Then by allowing a time ∆t sufficient for the wave front to enter the second medium, it may be shown much as in section 28.08 that the equation of the wave front in the q medium is
If the curvature of the boundary surface is zero, this reduces to
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© 1967 The Macmillan Company of Canada Limited
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Marshall, J.S., Pounder, E.R., Stewart, R.W. (1967). Simple Lens Systems. In: Physics. Palgrave, London. https://doi.org/10.1007/978-1-349-81613-2_29
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DOI: https://doi.org/10.1007/978-1-349-81613-2_29
Publisher Name: Palgrave, London
Print ISBN: 978-1-349-81615-6
Online ISBN: 978-1-349-81613-2
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