摘要:
A switchable optical element is described, along with a method of manufacturing such an element. The switchable optical element (1) comprises a fluid chamber (2) including immiscible first and second bodies of fluid (20, 22) disposed relative to one another along an optical axis (A) of the element (1). The second body of fluid (22) is movable in a direction away from the optical axis (A) by electro-wetting action, giving the switchable optical element (1) a changeable transmissivity along the optical axis (A). The switchable optical element (1) is suitable for use as an optical attenuator, e.g. a shutter, filter or diaphragm, and can be conveniently used in place of mechanical alternatives in applications such as cameras, laser resonant cavities, projectors and devices for scanning optical record carriers.
摘要:
A zoom lens comprising, from the object side to the image side, a front lens group (72), a controllable lens group, and a rear lens group (74), the controllable lens group comprising a voltage-controlled electrowetting device, which device contains a first fluid (A) and a second fluid (B) having different refractive indices, with at least two first fluid-second fluid interfaces (40,42). The curvatures, and thus the lens power, of these interfaces can be changed independently by supplying a voltage (V1, V2) to electrodes (22,32) of the device, so that no mechanical movement of lens elements is needed.
摘要:
A variable focus lens comprising a first fluid (A) and a second, non-miscible, fluid (B) in contact over a meniscus. A first electrode (2) separated from the fluid bodies by a fluid contact layer (10), and a second electrode (12) in contact with the first fluid to cause an electrowetting effect whereby the shape of the meniscus is altered. The fluid contact layer has a substantially cylindrical inner wall.
摘要:
An electrowetting module (20) comprises a fluid chamber (8) which contains a first fluid (A) and a second fluid (B), which are separated by an interface (14), and means to (16, 17) exert a force on at least one of the fluids to change the position and/or shape of the interface. By providing at least one of the fluids with a compound having a zero dipole moment in the gaseous phase, the performance of the module can be enhanced. For example the optical power of an electrowetting lens (30) can be increased.
摘要:
Beam manipulation member for use in an optical tweezers system, the beam manipulation member comprising at least one optical element, being controllably deformable in order to act on a laser beam in response to signals coming from the optical tweezers system. The beam manipulation member may be used to change the focal distance of the optical tweezers system and also to deflect the laser beam.
摘要:
An optical component (48) for introducing optical aberrations to a light beam defining an optical axis (28) is described, comprising a fluid chamber (46) having a first fluid (56) and at least a second fluid (58) therein, the first and second fluid (56, 58) being nonmiscible, the first fluid (56) and the second fluid (58) being in contact along an interface (60) extending through the fluid chamber (46) substantially transverse to the optical axis (28), the first and second fluids (56, 58) having different indices of refraction, the first fluid (56) being substantially electrically insulating and the second fluid (58) being substantially electrically conductive; at least a first electrode (62-70) separated from the second fluid (58) and at least a second electrode (72) acting on the second fluid to alter the shape of the interface (60) in dependence on a voltage applied between the first and second electrode (62-70, 72). The at least one first electrode (62-70) is arranged in an intermediate portion with respect to the interface (60) such that the intermediate portion (A, B) of the interface (60) is moved substantially in direction of the optical axis (28) in dependence on the voltage applied between the at least one first electrode (62-70) and the at least one second electrode (72)
摘要:
The present invention provides a discretely adjustable lens (300) that is controllable by means of electrostatic or electrowetting forces. The lens provides two accurately reproducible and freely designable lens states that are defined by interfaces between one out of two fluids (120,121) and at least one lens face (155). Changing place of the fluids by means of electrostatic or electrowetting forces provides for switching between the lens states. The lens may, for example, provide a macro lens option in a camera lens arrangement.
摘要:
An optical input and/or control de and/or actuating variable functions of, for examp device, the optical input and/or control device ha radiation from a diode laser (3) is converged. As across the window (12), part of the scattered radi due to the movement of the finger (15), re-enters measured using the self-mixing effect of the lase radiation emitted by the laser (3) and re-entering of the laser and thus in the radiation emitted by photo-diode (4) which converts the radiation vari circuitry is provided which processes this signal. ice for manually selectively controlling e, an image capture device or a computer mg a transparent window (12) on which an object, e.g. a user's finger (15), moves tion, whose frequency is Doppler-shifted the laser cavity. Relative movement is diode (3), which is the phenomenon that e laser cavity induces a variation in gain e laser (3). The change can be detected by a tion into an electric signal and electronic
摘要:
A beam-shaping element comprises a cavity, a first: fluid and a second fluid having different indices of refraction. An optical axis extends through the cavity. The cavity has at least one curved surface extending transverse the optical axis. At least one pump is arranged to pump the fluids between a first configuration in which the first fluid occupies the cavity, and a second configuration in which the second fluid occupies the cavity.
摘要:
A switchable diaphragm (9) and a device for beam deflection (10) are placed in the servo branch of an optical drive, in a path of light beams of different diffraction orders. This permits redirection of light beam orders towards a detection means (8) on an individual basis and selection of light orders at a detection means (8) depending on requirements. The number of detectors in the device detection means (8) can thus be reduced, thereby also reducing additional components associated with those detectors and saving on cost and complexity. With such device functionality, new methods for measuring beam landing and spherical aberration are developed.