Abstract: The invention relates to an optical zoom device (1) Optical zoom device (1), comprising a first lens assembly (2), and a second lens assembly (3) following the first lens assembly (2) in the direction of an optical axis (A) of the optical zoom device (1) so that light (L) can pass through the first lens assembly (2) and thereafter through the second lens assembly when travelling along the optical axis (A), wherein said lens assemblies each comprise a focus-adjustable lens (31, 32) as well as an electropermanent magnet (107, 207) or a shape memory alloy (120, 220) for actuating the respective lens (31, 32).

Abstract: The present invention relates to an optical device (1), comprising a lens (10) having an adjustable focal length, the lens (10) comprising a container (11) that encloses a lens volume (V) and a reservoir volume (R) that is connected to the lens volume (V), wherein the two volumes (R, V) are filled with a transparent liquid (L), wherein the container (11) further comprises a flat lateral wall structure (12) having a front side (12a) and a back side (12b), an elastically deformable and transparent membrane (20), a transparent cover element (30), and an elastically deformable wall portion (22), wherein the membrane (20) is connected to the back side (12b) of the lateral wall structure (12), wherein the cover element (30) is connected to the front side (12a) of the lateral wall structure (12) such that the lens volume (V) is arranged between the cover element (30) and the membrane (20), and wherein the wall portion (22) is arranged adjacent the reservoir volume (R), and wherein the wall portion (R) comprises an i

Abstract: The present invention relates to an optical zoom device (1), comprising: a first lens (31) having an adjustable focal length and comprising a container (41) filled with a transparent fluid (F), wherein the container (41) of the first lens (31) comprises an elastically deformable and transparent membrane (61) facing a transparent wall (21) of the container (41) of the first lens (31), a second lens (32) having an adjustable focal length, wherein the second lens (32) is arranged after the first lens (31) in an optical path (A) of the optical zoom device (1), wherein the second lens (32) comprises a container (42) filled with a transparent fluid (F), wherein the container (42) of the second lens (32) comprises an elastically deformable and transparent membrane (62) facing a transparent wall (22) of the container (42) of the second lens (32), and a light deflecting device (70) arranged in the optical path (A), wherein the second lens (32) is arranged after the light deflecting device (70) in the optical path (A).

Abstract: The invention relates to a near-eye display (1) comprising at least one pixel array (2), wherein the at least one pixel array (2) is planar and comprises a plurality of pixels (3) arranged in a plane, wherein each pixel (3) comprises a central emitter (60) configured to emit light in a controllable fashion, wherein the at least one pixel array (2) comprises an optical assembly (70) configured and adapted to collimate emitted light from each central emitter (60) of the pixel array (2) and to deflect the collimated light (101) from each pixel (3) such that the light emitted (100) from the central emitter (60) of each pixel (3) of the pixel array (2) propagates toward a common center portion (80) of the near-eye display (1). Furthermore, the invention relates to glasses (40) comprising a near-eye display (1) according to the invention.

Abstract: The invention relates to a lens (1) for vision correction, particularly in form of a contact lens, for vision correction, wherein the lens (1) comprises: a transparent base element (10) having a back side (12), and a front side (11) facing away from the back side (12), a transparent and elastically expandable membrane (20) connected to said base element (10), wherein said membrane (20) comprises a back side (22) that faces said front side (11) of the base element (10), a lens shaping member (particularly (30) connected to said the membrane (20)) so that the lens shaping member (30) defines an area (23) of the membrane (20) having an adjustable curvature, and wherein the lens (1) comprises a lens volume (41) adjacent said area (23), and wherein the lens (1) comprises a reservoir volume (42) arranged in a peripheral region (24) of the lens (1), wherein a transparent liquid (50) is arranged in the lens volume and in the reservoir volume, and at least one electro-osmotic pump (70) configured to transfer transpare

Abstract: The invention relates to a near-eye display (1) comprising at least one curved or flat screen (2), comprising a plurality of optical elements (3), each optical element (3) comprising a controllable central emitter (6) configured to emit light; for each central emitter (6), a corresponding collimating optics (7) comprised by the corresponding optical element (3), wherein the corresponding collimating optics (7) has an optical axis (11) and is arranged such with respect to the central emitter (6) that emitted light from the central emitter (6) is collimated and the collimated light propagates particularly parallel to the optical axis (11) of the corresponding collimation optics (7). The invention further relates to a method for displaying an image with the near-eye display (1).

Abstract: The invention relates to an optical device, comprising: a lens having an adjustable focal length. According to the invention, a light source which is configured to emit light that is affected by said lens and impinges on at least a first photosensitive element, which is designed to generate a first output signal corresponding to the intensity of light impinging on it, wherein the first photosensitive element is configured to measure only a portion of the intensity distribution of said emitted light, and wherein the light source, the lens and the first photosensitive element are configured such that a change of the focal length of said lens changes the intensity distribution of the emitted light that impinges on the first photosensitive element, so that each focal length of the lens is associated to a specific first output signal generated by the first photosensitive element.

Abstract: The invention relates to an optical device (1) for enhancing the resolution of an image, comprising: a transparent plate member (10) configured for refracting a light beam (20) passing through the plate member (10), which light beam (20) projects an image comprised of rows and columns of pixels (40), a carrier (50) to which said transparent plate member (10) is rigidly mounted, wherein the carrier (50) is configured to be tilted between a first and a second position about a first axis (A), such that the plate member (10) is tilted between the first and the second position about the first axis (A), whereby said projected image (30) is shifted by a fraction (?P) of a pixel, particularly by a half of a pixel, along a first direction (x), and an actuator means (60) that is configured to tilt the carrier (50) and therewith the plate member (10) between the first and the second position about the first axis (A).

Abstract: The present invention relates to an optical device (1), comprising a lens (2) having an adjustable focal length, and four actuators (3) for adjusting the focal length of said lens (2) and for stabilizing an image generated by the optical device (1) with help of said lens (2). According to the present invention, each actuator (3) comprises an electrically conducting first coil (301) for adjusting said focal length and a second electrically conducting coil (302) for stabilizing said image, wherein the first coils (301) are connected in series, wherein the optical device (1) is configured to apply a first current (I1) to the first coils (301) for adjusting said focal length, and wherein for stabilizing said image, the optical device (1) is configured to apply a second current (I2) to a first pair (31) of second coils (302) and a third current (I3) to a second pair (32) of second coils (302).

Abstract: The invention relates to an optical system (1) comprising: a first focus tunable lens (10), a curved image sensor (30) configured to receive light (L) focused by the first focus tunable lens (10); an optical path (P) extending through the first focus tunable lens and to the curved image sensor; wherein the optical system (1) is configured to tune the focal length of the first focus tunable lens (10) by applying an electrical signal to the first focus tunable lens (10) such that light (L) traversing said optical path (P) is focused onto the image sensor (30).

Abstract: An actuator including an electrically conducting coil arranged on or integrated into a wall member, wherein the electrically conducting coil is arranged adjacent to a magnetic flux return structure. A magnet connected to a carrier, wherein the magnet interacts with the electrically conducting coil such that when a current is applied to the coil the coil is either moved towards the carrier along an axial direction or away from the carrier along the axial direction depending on a direction of the current within the coil. A magnetic flux guiding structure connected to the carrier, wherein magnetic flux is guided through the flux return structure and the flux guiding structure.

Abstract: The present invention relates to a tunable prism for deflecting light incident on the tunable prism in a variable fashion, wherein the tunable prism comprises: a member comprising a transparent and flexible first surface, a transparent and flexible second surface that faces away from the first surface, and an optical medium arranged between the two surfaces, such that light (L) incident on the first surface passes through the optical medium and exits the member via the second surface, whereby the light (L) is deflected by the member depending on an angle (W) between the two surfaces, a rigid first optical element comprising a surface area connected to the first surface, a rigid second optical element comprising a surface area connected to the second surface, and an actuator system configured to tilt the first optical element and/or the second optical element to tune said angle.

Abstract: The invention relates to a lens (1) for vision correction, wherein the lens (1) is particularly configured to be placed directly on the surface of an eye (2) of a person, wherein the lens (1) further comprises: a transparent base element (10) having a back side (12), and a front side (11) facing away from the back side (12), a transparent and elastically expandable membrane (20) connected to said base element (10), wherein said membrane (20) comprises a back side (22) that faces said front side (11) of the base element (10), a ring member (30) connected to said back side (22) of the membrane (20) so that the ring member (30) defines a curvature-adjustable area (23) of the membrane (20), and wherein the lens (1) comprises a lens volume (41) adjacent said curvature-adjustable area (23) of the membrane (20), which lens volume (41) is delimited by the ring member (30), and wherein the lens (1) comprises a reservoir volume (42) arranged in a boundary region (24) of the lens (1), wherein said two volumes (41, 42) a

Abstract: The present invention relates to an Optical zoom device, comprising a first lens having an adjustable focal length and a second lens having an adjustable focal lens, wherein each lens comprises a lens core filled with a transparent fluid, wherein the respective lens core comprises a first wall in the form of an elastically deformable membrane and a transparent second wall facing the first wall, wherein the fluid is arranged between the two walls of the respective lens core, and wherein the respective lens comprises a lens shaping member interacting with the respective membrane for adjusting the focal length of the respective lens and/or for stabilizing an image generated with help of the two lenses, wherein the optical zoom device comprises a first and a separate second lens barrel, wherein the first lens core is mounted on the first lens barrel and the second lens core is mounted on the second lens barrel, wherein the optical zoom device comprises at least one actuator associated to the first lens for genera

Abstract: The invention relates to an eye training system (1) with the spectacles (10) that comprise at least the following components: A frame member (11) configured to keep the spectacles (10) on the head of a person wearing the spectacles (10), two optical assemblies (12) arranged at the frame member (11), wherein the optical assemblies (12) are arranged such at the frame member (11) that when the spectacles (10) are worn on the head of the person said optical assemblies (12) are in front of the eyes of the person, wherein each optical assembly (12) comprises a focus-tunable lens (13) with an adjustable focal length, a control circuit (22) comprising a processor, wherein the control circuit is configured to control the focal lengths of the focus-tunable lenses (13) in response to data (200) received from an external computer or provided by the processor. The invention further relates to a method and a computer program for performing eye training with the eye training system (1).

Abstract: The invention relates to an optical device (1), comprising: at least a first lens (100) having an adjustable focal length, wherein the first lens (100) comprises a container (2) comprising at least one reservoir volume (90) and a lens volume (91) which are in flow communication via a channel (92) and filled with a transparent fluid (F), and wherein the container (2) comprises a stretchable transparent membrane (21) and a transparent lens shaper (22) that is immersed in the fluid (F) and connected to the membrane (21), so that the lens shaper (22) defines a curvature-adjustable area (23) of the membrane (21), and wherein the container (2) comprises a transparent back wall (30) facing the membrane (21), wherein the fluid (F) is arranged between the membrane (20) and the back wall (30). According to the present invention, the at least one reservoir volume (90) is covered by a wall (21), wherein a plunger (94) for interacting with an actuator part (e.g.

Abstract: The present invention relates to a lens device (1), comprising: a transparent and elastically expandable membrane (10), an optical element (20) opposing the membrane (10), a wall member (300), wherein the optical element (10) and the membrane (10) are connected to the wall member (300) such that a volume (V) is formed, a fluid (F) residing in said volume (V), and a lens shaping member (11) attached to the membrane (10).

Abstract: The invention relates to an optical device, comprising: a lens having an adjustable focal length. According to the invention, a light source which is configured to emit light that is affected by said lens and impinges on at least a first photosensitive element, which is designed to generate a first output signal corresponding to the intensity of light impinging on it, wherein the first photosensitive element is configured to measure only a portion of the intensity distribution of said emitted light, and wherein the light source, the lens and the first photosensitive element are configured such that a change of the focal length of said lens changes the intensity distribution of the emitted light that impinges on the first photosensitive element, so that each focal length of the lens is associated to a specific first output signal generated by the first photosensitive element.

Abstract: The invention relates to a device (1, 2) for pivoting an optical element (10), comprising: an optical element (10), wherein the optical element is movably mounted so that the optical element can be tilted at least about a first axis (A), a magnet (20) extending in an extension direction (Z), wherein the magnet (20) comprises a magnetization (M) aligned with said extension direction (Z), and wherein the magnet (20) comprises a front side (20a), and wherein optical element (10) is rigidly coupled to the magnet (20) or to a first conductor section (30) that faces the front side (20a) of the magnet (20) in the extension direction (Z), wherein the first conductor section (30) extends along the first axis (A), and a current source means (50) electrically connected to the first conductor section (30), which current source means (50) is designed to apply an electrical current (I) to said first conductor section (30), so that a Lorentz force is generated that tilts the optical element (10) about said first axis (A) al

Abstract: The present invention relates to an optical device (1), comprising: a container (2) forming a fluidic lens, the container (2) comprising a transparent and elastically expandable membrane (10), a transparent optical element (20) facing the membrane (10), and a wall member (3), wherein the optical element (20) and the membrane (10) are connected to the wall member, and wherein said container encloses a volume (V) that is filled with a fluid (F), a lens shaping part (11) that is in contact with said membrane (10) for defining a curvature adjustable area (10c) of the membrane (10), which area (10c) faces said optical element (20), and a circumferential lens barrel (50) extending in an axial direction, which lens barrel (50) surrounds an opening (50c) in which at least one rigid lens (51) is arranged that is held by the lens barrel (50), and a voice coil motor (5) that is designed to move the lens shaping part (11) along an axial direction (z) with respect to said container (2), so as to adjust a curvature of said