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The liquid lenses that we develop are based on the
electrowetting phenomenon described below : a water drop is set
onto a substrate made of metal, covered by a thin insulating
layer. |
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The liquid lens uses two isodensity liquids, one
is an insulator while the other is a conductor. The variation of
the contact angle (Q) leads to a change of curvature of the
liquid-liquid interface. |
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| Large inverse focal length range | ||
| No moving parts | ||
| Direct electric control | ||
| Fast response (0.02s for a 5mm diameter) | ||
| Very good optical quality (wave-front distortions less than 1 micrometer) | ||
| Good transparency in the visible range | ||
| Operating temperature range : 10°C – 50°C mini | ||
| No hysteresis | ||
| Very good stability of the optical axis | ||
| Reduced electrical consumption | ||
| Good stability to shocks | ||
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