Diffraction
If light encounters periodic structures with expansions in
the wavelength light, diffracted (see illustration).licht.
Light refraction materials
with different optical properties
Light refraction against structures
such microprisms microlenses
Light refraction against very fine
structures for thorough mixing light
Medium 1
Medium 2
θ1
θ2
In: ZVEI Guidelines, Planning reliability LED lighting,
available from: www. For
light waves particular this phenomenon described by
the refraction index medium.
Such structures may transmission grids, reflection
grids (phase grids) holographic grids, for example.de
.
Diffraction chromatic light results unfolding the
light spectrum.
At the transition between two media with differing
refraction index, the beam therefore changes direction
according Snell’s law refraction.79
The Lighting Handbook
Refraction
Refraction indicates the change direction wave
due spatial change its rate propagation
