April 2016
Intermediate to advanced
831 pages
52h 39m
English
Content preview from Handbook of Biomedical Optics
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3
Geometrical optics is the study of light without diraction or
interference and is based on Fermat’s principle. We treat light
as particles of energy traveling through space. ese particles
follow trajectories that are called rays. Hence, geometrical
optics is oen called ray optics. Fermat’s principle is a concise
statement that contains all the physical laws, such as the law of
reection
and the law of refraction, in geometrical optics (Poon
and Kim 2006).
1.1 Fermat’s Principle
Fermat’s principle states that the path of a light ray follows is an
extremum in comparison to nearby paths. e extremum may be
a minimum, a maximum, or statio ...
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