Abstract: A metallic-dielectric photonic crystal is formed with a periodic structure defining a plurality of resonant cavities to selectively absorb incident radiation. A metal layer is deposited on the inner surfaces of the resonant cavities and a dielectric material fills inside the resonant cavities. This photonic crystal can be used to selectively absorb broadband solar radiation and then reemit absorbed radiation in a wavelength band that matches the absorption band of a photovoltaic cell. The photonic crystal can be fabricated by patterning a sacrificial layer with a plurality of holes, into which is deposited a supporting material. Removing the rest of the sacrificial layer creates a supporting structure, on which a layer of metal is deposited to define resonant cavities. A dielectric material then fills the cavities to form the photonic crystal.
Abstract: An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; a third lens having positive refractive power; a fourth lens; a fifth lens; and a sixth lens, arranged in this order from an object side to an image plane side. The fifth lens is formed in a shape so that a surface thereof on the image plane side has a positive curvature radius. The fifth lens and the sixth lens have a specific composite focal length. The first lens is disposed away from the second lens by a specific distance on an optical axis thereof. The second lens is disposed away from the third lens by a specific distance.
Abstract: The present invention provides a lens driving apparatus including: a driving coil for driving a lens holder; and a leaf spring configured to absorb an impact on the lens holder; wherein the driving coil is electrically connected to the leaf spring, and a particularly bent portion and a recess for accommodating the bent portion are provided at a joint where the driving coil and the leaf spring are connected so as to improve the mechanical stability of the apparatus.
Abstract: The optical system of the present invention includes, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; and a third lens group G3 having positive refractive power, wherein the first lens group G1 and the third lens group G3 are fixed in an optical axis direction, while the second lens group G2 is moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group G3 includes, in order from the object side: an object-side group G3a; an aperture stop S; and an image-side group G3b, and a specified condition is satisfied.
Abstract: A lens barrel capable of maintaining a pivot regulating function of the lens holder even if a forceful impact is received from outside. A lens holder holds a lens and is movable in an optical axis direction. A fixing member supports both ends of a first guide shaft for guiding the lens holder in the optical axis direction and supports a second guide shaft in a cantilever manner. The second guide shaft is shorter than the first guide shaft and regulates a pivot of the lens holder on the first guide shaft by engaging with the lens holder. A pivot regulating mechanism is disposed between a wall portion of the fixing member that supports one end of the first guide shaft and the lens holder. The mechanism regulates the pivot of the lens holder in a case where engagement between the lens holder and the second guide shaft is released.
Abstract: Illumination can be evaluated for patient using a system including a housing, an adjustable light source mechanically coupled to the housing and configured to illuminate an object for viewing by the patient on an axis substantially perpendicular to a surface of the object. A user-adjustable input coupled to the adjustable light source is to obtain information from a user indicative of a calibrated illuminance and a color property to be provided by the adjustable light source including providing a range of adjustable illuminance and color properties selectable by the user. The adjustable light source can be configured to provide light having an illuminance in excess of 300 lux, and the housing can be configured to provide a first specified distance between the adjustable light source and the object for viewing and to obstruct viewing of the light source directly by the patient.
Abstract: A monitor/display is used to display a vision test. A patient is spaced a predetermined distance from the monitor/display during the testing procedure, and individual, multiple LED housings are equally spaced about a center point of the monitor/display to direct light toward the patient during at least a portion of the test procedure. The light emanating from the individual housings is a diffuse, unfocused light to simulate glare, and the intensity of the light may be selectively altered. Conducting vision testing under glare conditions determines if there is any reduction or fall off in the patient's vision under such circumstances and provides an Indication of whether the patient may require cataract surgery or has another ocular problem. An assembly allows an existing vision testing system to be easily modified to provide glare light testing capabilities.
Abstract: A contact lens includes a transparent material, a substrate material, a light source, an optical system, and a phase map. The transparent material has an eye-side opposite an external side. The eye-side is curved to fit the human eye. The light source is configured to emit illumination light. The optical system is configured to receive the illumination light from the light source and output the illumination light as an in-phase wavefront. The phase map is configured to adjust a phase of the in-phase wavefront to form an image at a retina-distance in response to being illuminated by the in-phase wavefront. The phase map is pre-recorded with a phase pattern that is included in the image.
Abstract: A near-eye display includes a light source, an optical system, and a phase map. The light source emits illumination light. The optical system is configured to receive the illumination light from the light source and output the illumination light as an in-phase wavefront. The phase map is configured to adjust a phase of the in-phase wavefront to form an image in response to being illuminated by the in-phase wavefront. The phase map is pre-recorded with a phase pattern that generates the image.
Abstract: An optical positioning aiming system including an optical positioning subsystem (subsystem). The subsystem is configured to determine relative positions of a weapon and a head mounted display. The subsystem includes a processing unit, infrared (IR) emitters mounted to a weapon, IR emitters mounted to the head mounted display, IR cameras mounted to the weapon, and IR cameras mounted to the head mounted display. The IR cameras mounted to the weapon are configured to determine a relative position of the IR emitters mounted on the head mounted display and to communicate the relative position of the IR emitters mounted on the head mounted display to the processing unit. The IR cameras mounted to the head mounted display are configured to determine a relative position of the IR emitters mounted to the weapon and communicate the relative position of the IR emitters mounted to the weapon to the processing unit.
Abstract: An imaging lens is substantially constituted by: a negative first lens group; a positive second lens group; an aperture stop; a positive third lens group; and a negative fourth lens group; provided in this order from an object side. The first lens group is constituted only by two or more negative lenses. The second lens group has a positive lens at the most object side thereof. The third lens group has a negative lens having a concave surface toward the object side at the most object side thereof. The fourth lens group is constituted by a single negative lens. The fourth lens group moves from the object side to an image side when changing focus from an object at infinity to an object at an extremely close distance. Only the fourth lens group moves during focusing operations.
Abstract: A large filed achromatic lens is disclosed, including a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, and a sixth lens element arranged sequentially along the propagation direction of an incident ray. The first lens element is a meniscus lens element including a first curved surface and a second curved surface; the second lens element is a meniscus lens element, including a third curved surface and a fourth curved surface; the third lens element is a biconvex lens element, including a fifth curved surface and a sixth curved surface; the fourth lens element is a biconvex lens element, including a seventh curved surface and an eighth curved surface; the fifth lens element is a biconcave lens element including a ninth curved surface and a tenth curved surface; and the sixth lens element is a plane lens element adapted to play a role in protecting other lens elements.
August 22, 2013
Date of Patent:
October 17, 2017
HAN'S LASER TECHNOLOGY INDUSTRY GROUP CO., LTD., HAN'S CNC SCIENCE AND TECHNOLOGY CO., LTD.
Jiaying Li, Chaoming Zhou, Bo Sun, Yunfeng Gao
Abstract: Presently described are optical stacks comprising a first optical film comprising a plurality of structures comprising an optically active portion designed primarily to provide optical gain and optionally an optically in-active bonding portion disposed on a first surface bonded to a second optical film with a light-transmissive adhesive layer such that a portion of the structures penetrate the adhesive layer and a separation is provided between the adhesive layer and the first surface. In one embodiment, the optical stacks exhibit a combination of high peel strength and high retained brightness, particularly after aging. The adhesive layer preferably comprises an interpenetrating network of the reaction product of a polyacrylate component and a polymerizable monomer and the adhesive layer has an elastic modulus ranging from 100 to 2000 MPa at 25° C.
March 26, 2012
Date of Patent:
October 17, 2017
3M Innovative Properties Company
William F. Edmonds, Brandt K. Carter, Jason S. Petaja
Abstract: Provided is a micro-lens capable of changing a focal length. The micro-lens includes a plurality of electrodes, and an electrowetting liquid layer that is separable from the electrodes and that has a focal length that is controlled by a voltage applied to the electrodes.
November 30, 2012
Date of Patent:
October 17, 2017
Samsung Electronics Co., Ltd.
Kyu-hwan Choi, Yun-hee Kim, Eok-su Kim, Jung-mok Bae, Hoon Song, Kang-hee Won, Yoon-sun Choi
Abstract: An optical module (10) having at least one beam-forming element (14) and having at least two retainer brackets (20) for fastening the optical module (10) to a carrier (30) are provided. In this connection the retainer brackets (20) have a first support element (22a) at a first spacing with respect to the lens (14) and a second support element (22b) at a second spacing different from the first spacing with respect to the beam-forming element (14) in order to selectively fasten the optical module (10) to the carrier (30) at the first spacing or at the second spacing.
Abstract: In various embodiments, wavelength beam combining laser systems incorporate optical cross-coupling mitigation systems and/or engineered partially reflective output couplers in order to reduce or substantially eliminate unwanted back-reflection of stray light.
Abstract: A light adjusting apparatus including a drive section provided with an axial magnet, a coil core member and a coil, a first substrate provided an opening and a first cut-out portion, a second substrate provided with an opening and a second cut-out portion, located at a predetermined distance from the first substrate, an incident light adjusting section to which the axial magnet is joined, and an axial magnet support member provided with a distance keeping portion that keeps a distance between the coil core member and the axial magnet to within a certain range and a dropout prevention portion that prevents dropout of the axial magnet from the first cut-out portion, the axial magnet support member being fixed to the coil core member, in which the incident light adjusting section is rotated by the drive section for adjusting the incident light.
Abstract: An electrowetting display comprises a support plate on which individual electrowetting pixels separated from one another by pixel walls are formed. The individual electrowetting pixels include a first conductive layer and a second conductive layer on the support plate. The first conductive layer and the second conductive layer are separated by a dielectric layer in first portions of the individual electrowetting pixels. The first conductive layer and the second conductive layer are in electrical contact with one another in second portions of the individual electrowetting pixels, wherein the second portions of the individual electrowetting pixels may be U-shaped.
Abstract: The present invention relates to an illuminated lens apparatus (10) placed on the eye wall and comprising a hollow base (11), a fixed lens (13) placed inside said hollow section and a handle (14) connected to the base (11). Said illuminated lens apparatus (10) is characterized in comprising a ring (12) provided in such a manner to enclose the base (11) upper surface and at least one bushing (20) configured on said ring (12) in such a manner to enable positioning of illumination probe (30) therein.
Abstract: A semiconductor laser module (10) comprises a tapered laser diode (12) and/or a tapered amplifier diode equipped with beam shaping optics (14). The tapered laser diode and/or the tapered amplifier diode includes an emission facet (16) for emitting a laser beam (18) along a beam axis (24). The beam-shaping optics comprise a plano-convex cylindrical lens oriented so as to change divergence of the beam in the fast axis direction, the plano-convex spherical cylindrical lens having a planar surface (26) arranged facing the facet and a circular cylindrical surface (22) facing away from the facet.