OPTISCHES ELEMENT MIT EINER MAGNETISCHEN FLÜSSIGKEIT
摘要
A variable focus (10) lens comprising a fluid chamber (12) containing a first fluid (14) and a second fluid (16) is disclosed. The fluids are non-miscible and in contact over a meniscus (18) and the second fluid is able to alter its shape on the influence of a magnetic field. The second fluid is preferably a ferrofluid. Means (20, 22) for applying a gradient magnetic field (24) over at least a part of the fluid chamber are provided that are capable of inducing a magnetic flux maximizing movement of the fluids, such that the shape of the meniscus varies in dependence on the magnetic field.
申请公布号
AT437376(T)
申请公布日期
2009.08.15
申请号
AT20050742805T
申请日期
2005.05.27
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
HENDRIKS, B. H. W.;VAN SANTEN, HELMAR;VAN DER AA, MICHIEL.;OPHEY, WIL;TUKKER, TEUS;KUIPER, STEIN