摘要:
An optical element comprises a fluid chamber, the fluid chamber having side and end walls, and contains a first fluid (20) and a second fluid (22). The fluids are non-miscible and the second fluid is capable of being influenced by a magnetic field. A device (19) for providing a magnetic field over at least a portion of the fluid chamber is provided, with the magnetic field being capable of moving the second fluid so that the positions of the first an second fluids in the fluid chamber are altered. The second fluid may be a ferrofluid.
摘要:
An optical element comprises a fluid chamber and a device for providing a magnetic field over at least a portion of the fluid chamber The fluid chamber has side portions and end portions, and contains a first fluid and a second fluid. The fluids are non-miscible and the second fluid is capable of being influenced by a magnetic field. The end portions of the fluid chamber are connected together only by the side portions.
摘要:
The present invention discloses a method for measuring an intensity of a part of an electromagnetic spectral range, and an electronic device implementing the method. The method comprises the steps of providing an electronic device comprising an optical device (10) comprising at least a first liquid (A) and being placed in front of a sensor (120), the optical device (10) having a transmittance of the part of the electromagnetic spectral range depending on an orientation of at least the first liquid (A); measuring a first intensity of the electromagnetic (EM) spectral range; changing the orientation of at least the first liquid (A); measuring a second intensity of the electromagnetic spectral range; and calculating an intensity of the part of the electromagnetic spectral range from the difference between the first intensity and the second intensity. Consequently, an intensity for a part of the EM spectral range can be measured without the need for a sensor dedicated to this part of the EM spectral range. In particular, an optical element based on the electrowetting principle is used in a mobile phone to measure the intensity of UV radiation.
摘要:
A variable lens (20) of electrowetting type comprise a fluid chamber (22) including a first, electrically conductive, fluid (40) and a second, nonconductive, fluid (50) and further comprises a first electrode (34) connected to the first liquid and second electrode means (30,32) arranged on the inner side of the chamber wall (24), whereby a volume of one of the fluids is arranged between two volumes of the other fluid. The lens can be driven by a low voltage applied between the first electrode and the second electrode and has relatively high optical power, due to the two interfaces between the fluids.
摘要:
A switchable optical unit, capable of controlling a beam of radiation (b) passing through an optically active portion (8) of the unit, comprises a fluid chamber (10) including an electrically conductive liquid (18), which chamber comprises a pair of first electrodes (20,22) fixed to the chamber inner walls (12,14) at the position of the optically active portion and second electrode means (24) fixed to inner walls of the chamber outside the optically active portion and a third electrode (28) connected to the conductive liquid. By applying a voltage (V) to the first electrodes and the second electrode means, respectively the conductive liquid can be moved in and out the optically active portion so that the unit (1) is switched between a least two discrete states.
摘要:
A controllable optical lens comprises a chamber housing first and second fluids, the interface between the fluids defining a lens surface. An electrode arrangement controls the shape of the lens surface and is also for sensing the shape of the lens surface. The electrode arrangement comprising a plurality of electrode segments at different angular orientations about an optical axis of the lens. Surface characteristics are sensed at a plurality of angular orientations from the plurality of electrode segments, and in this way the local shape characteristics of the lens at different angular positions around the lens can be determined. In this way, asymmetry can be detected.
摘要:
The present invention discloses an optical device comprising a container enclosing a first liquid (A) and an electrically susceptible second liquid (v2), said liquids (A; B) being immiscible and being in contact with each other via an interface (14); at least one of the liquids (A; B) being at least partially placed in a light path through the container; said liquids having an averaged kinematic viscosity V (in m2/s) and an averaged density D (in kg/m3). said liquids experiencing a surface tension S (in N/m), the optical device having a diameter d (in m) in at the contact line of said interface (14) with an inner wall of the container, the optical device obeying the relationship, (Formula I) Such an optical device has a critically damped or a near-critically damped interface, thus yielding a device that can be subjected to high switching frequencies.
摘要:
A controllable optical lens system, comprises a chamber housing first and second fluids, the interface between the fluids defining a lens surface. An electrode arrangement controls the shape of the lens surface and has first and second electrodes. A parameter is determined by the system dependent on the electrical resistance through at least one of the lens fluids between the first and second electrodes. Thus, the series resistance through a lens fluid is used as a measure of meniscus position.
摘要:
A controllable optical system has an optical component comprising a chamber housing first and second fluids, the interface between the fluids defining a boundary surface (15;88a,88b) and an electrode arrangement (14,16;86,87) for electrically controlling the shape of the boundary surface. A drive circuit is operable in an operative mode and an inoperative, power saving mode, and a storage capacitor maintains a signal on the electrode arrangement during the inoperative mode. Feedback is used control switching of the drive circuit between modes taking into account the boundary surface conditions.
摘要:
An optical element (1) for correcting refractive index related aberrations comprises a fluid chamber (5) which is provided with an electrode configuration (2,12) and includes a first, electrically conducting, fluid (B) and a second, non-conducting, fluid (A), and an interface (14) between the fluids, the fluids having different Abbe numbers. By applying a voltage (VO to the electrode configuration electrowetting forces are generated, which deform the shape of the interface (14,14′) and determine the corrective power.