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Optical Devices
Ghent LC
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Liquid Crystal Microlenses
An LC microlens can be manufactured by depositing
spots of photoresit on the lower alignment surface. It is assumed
that the LC director follows the surface of the lens. When a planar
ground electrode is positioned beneath the lens and then a voltage
is applied, defects forms above the centre of the lens.

Fig.1: Director field about
a sinusoidal microlens
Simulations show that if the ground electrode can be made to follow
the surface of the lens, then this defect formation can be avoided.
The focal length of the lens can be controlled by the applied voltage.
This page last modified
2 June, 2006
by r.james
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