Dielectrically actuated liquid lens
2007; Optica Publishing Group; Volume: 15; Issue: 12 Linguagem: Inglês
10.1364/oe.15.007140
ISSN1094-4087
AutoresChih-Cheng Cheng, J. Andrew Yeh,
Tópico(s)Biosensors and Analytical Detection
ResumoA packaged liquid lens driven by the dielectric force was demonstrated. The liquid lens consisted of a low dielectric constant droplet and a high dielectric constant sealing liquid. The two non-conductive liquids were sealed in a chamber under the condition of iso-density. Focal length of a liquid lens with an aperture of 3mm changed from 34mm to 12mm in the range of 0-200V. Hysteresis was observed in the liquid lens, with a maximum value measured of 12.5 degrees at 120 volts in terms of droplet's contact angle. The focal spot size measured approximately 80mum. Rise and fall times were 650ms and 300ms, respectively. The lens consumed 1mW of power when applying a 200 volt, 1 kHz signal. The longitudinal and transverse spherical aberrations were estimated to be nearly invariant when the focal length exceeded 20mm.
Referência(s)