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These principles are applied define the photometric
properties luminaires terms lighting patterns.78
The Lighting Handbook
Optics
The direction light based three fundamental
principles: reflection, refraction and diffraction.
Light control technology
higher
refractive
index
lower
refractive
index
. The aim reflect as
much light possible, absorbing only
little it. Here, too, the aim reflect
as much light possible and absorb
only little it.
High-precision light direction structures made of
tried-and-tested well innovative materials extend
the range with view both optics and design.
This means that the light beam does
not pass out from the material with a
higher refractive index, but reflected
back.
Total reflection
A beam light coming from medium
with higher refractive index that hits
the boundary medium with a
lower refractive index will reflected
away from the incident slot. the
incident angle further increased, total
reflection will occur critical angle.
Lambertian reflectance
Nearly all light reflected diffusely:
light reflected all directions, in
accor
dance with Lambert’s law, so
that the reflecting surface appears
equally bright from any direction of
view.
Reflection
In physics, reflection the change direction a
wavefront interface between two media with a
differing refractive index that the wavefront returns to
the medium from which originated.
Specular reflection
Nearly all light reflected according to
the law reflection (incident angle =
reflected angle)
