Abstract: A drive frame 34 as a cylindrical molded article has a drive frame main body 34a, three first cam grooves 34c, three second cam grooves 34d, three high-density regions H, and three cam pins 43. The cam pins 43 are disposed in the circumferential direction between first center lines X1 which are positioned in the center in the circumferential direction between adjacent high-density regions H, and the high-density regions H.

Abstract: An exemplary lens includes a light pervious substrate, a first optically active part, and a light blocking film. The light pervious substrate has a first surface, an opposite second surface, and a recess defined in the first surface. The recess includes a bottom surface. The first optically active part is formed on the bottom surface. The light blocking film is formed on the bottom surface surrounding the first optically active part.

Abstract: Briefly, in accordance with one or more embodiments, a birefringent layer may be utilized in conjunction with a head-up display (HUD) for a vehicle or the like, for example where the birefringent layer is disposed in or on the windshield. The birefringent layer may impart a change in the polarization of light emerging from a projector of the head-up display in order to reduce or minimize interference between beams from the display and reflecting off of two or more surfaces that are combined at the viewer's eye, and/or to reduce or minimize the effect of polarizing sunglasses on the viewability of the image projected by the display. In one or more embodiments, the birefringent layer alters the polarization of the light reaching the viewer's eye if the user is wearing polarizing glasses or lenses so that less light from the display is blocked.

Abstract: A lens barrel with improved precision is obtained by reducing fitting play of a lens barrel. A coil and a magnetic member are fixed on a lens holding member, and a magnet and a yoke are fixed on an outer barrel. When energizing the coil, the lens holding member moves in the optical axis direction along guide bars by magnetic fluxes from the magnet. The magnetic member receives a magnetic attraction force toward the magnet by leakage fluxes. In the lens holding member, a bearing sleeve is biased by the attraction force perpendicularly to the axis of the guide bar, and the resultant force of the attraction force and a gravitational force exerted on the lens holding member removes play. A resultant force of a force toward the guide bar exerted on the bearing and the gravitational force thereon removes fitting play between the bearing and the guide bar.

Abstract: The present invention provides a Micromirror Array Lens (MMAL) with fixed focal length to reproduce a designed surface having optical focusing power. The micro mechanical structures with surface profile shape memory are fabricated and released after fabrication. Each micromirror in the MMAL has its own motion by stiction force and/or electrostatic force while and/or after the releasing process. Once the designed surface is formed, the MMAL has an optical power as a lens.

Abstract: An electrowetting cell including an expandable joint between a body section and an end section. Such an expandable joint could include a membrane or a flange-like portion.

Abstract: Eyewear having an enhanced air flow and/or absorption features which may be used for safety, sports, and the like. The eyewear may desirably provides features in design and/or function of the structure to enhance air flow and reduce moisture. Additional elements such as removable pads and/or cartridges may be used with the eyewear to enhanced airflow and reduce moisture adjacent a user's eyes and face as well.

Abstract: A light shielding piece is supported by a second lens holding frame such that the light shielding piece can rotate and move on a plane which is perpendicular to an optical axis. In a shooting state, a through hole formed in the second lens holding frame is closed to establish a light shielding state. In a retracted state, on the other hand, a first auxiliary shaft passing through a through hole of the second lens holding frame pushes the light shielding piece to generate a component force. The generated component force rotates and moves the light shielding piece on a plane which is perpendicular to the optical axis, and the lens barrel is brought into an opened state where the through hole is not blocked.

Abstract: A method of fixing an optical member for fixing the optical member to a supporting member, wherein an intermediate member that is fused upon irradiation light is disposed between the optical member and the supporting member. By irradiating the light that is transmitted through the optical member onto the intermediate member, the intermediate member is fused, and the optical member is fixed to the supporting member.

Abstract: An apparatus is used to manually set a parameter of a lens of a television, video or studio camera, and especially to set the distance between the camera and an object which is to be photographed. The apparatus which is connectable with the camera, has a hand wheel that can be rotated about an axis of rotation, as well as an adjusting wheel that can be connected through a gear mechanism with the hand wheel to engage a corresponding wheel at the lens for setting the parameter. Two stops, which can be adjusted variably relative to one another and fixed at different angular positions, are provided for limiting the angle of rotation of the hand wheel. A counterstop, arranged in the path of the two stops, is connected torsionally rigidly with the hand wheel.

Abstract: A lens and a light emitting device package formed by introducing surface mount technology (SMT) are disclosed. The lens includes a refractive portion which refracts incident light, and at least one surface mount portion, wherein a portion of the surface mount portion is formed in the refractive portion.

Abstract: A position detecting device includes an optical position detecting element and a position information portion which are disposed so as to be opposed to each other. The position information portion has a binary pattern where a high light efficient portion and a low light efficient portion are alternately repeated when the movable portion moves in a predetermined direction. The position detecting device includes a loose position detecting portion for detecting a loose position of the movable portion by counting a pulse signal obtained by the optical position detecting element, a close position detecting portion for detecting a close position of the movable portion by counting pulse number of driving pulses which are applied to an electromechanical transducer from a position where the loose position detection is carried out, and a combining arrangement for combining the loose position with the close position to calculate a current position of the movable portion.

Abstract: An engagement pawl of a linear-movement guide ring engages with an engagement groove of a cam ring, and hence the cam ring is supported by the linear-movement guide ring non-movably in an optical-axis direction. When the cam ring is rotated, a cam pin of a second group moving frame moves in the optical-axis direction along a cam groove formed in an inner periphery of the cam ring. The cam groove includes a plurality of first cam grooves and a plurality of second cam grooves. The engagement groove of the cam ring intersects with the second cam groove. The engagement pawl has a width larger than a groove width of the second cam groove intersecting with the engagement groove.

Abstract: An exemplary optical lens assembly includes a first lens and a second lens. The first lens comprises a first central portion and a first annular stepped portion. The first annular stepped portion has a first outer step and a second outer step. The first outer step has a first outer side surface and a first downward-facing surface. The second outer step has a second outer side surface. The second lens comprises a second central portion and a second annular stepped portion. The second annular stepped portion has a first inner step and a second inner step. The first inner step has a first inner side surface and a first upward-facing surface. The second inner step has a second inner side surface. The first annular stepped portion is engaged in the second annular stepped portion. A gap exists between the second outer side surface and the first inner side surface.

Abstract: A lens driving device is provided with a holder that holds a lens, a supporting portion that supports the holder displaceably along an optical axis of the lens, and at least one magnet that is arranged symmetrically with respect to the optical axis on side surfaces of the holder. The supporting portion is provided with a coil so as to face toward the magnet. The supporting portion is also provided with a magnetic member so as to face toward the magnet.

Abstract: An optical recording unit having a compound lens which includes a lens stack. The lens stack encompasses a plurality of lenses, which are inset in a tubular housing. The lens stack includes a spacer ring which accommodates a sealing material or a sealing element and which is braced resiliently against one of the lenses in the tubular housing.

Abstract: A mechanism for adjusting the position of an optical device with respect to a field helmet along an axis of translation is provided. The mechanism comprises an optical device mounting component for coupling to the optical device. A field helmet mounting component for coupling to the field helmet is slideably coupled to the optical device mounting component along the axis of translation. A lever configured for selectively engaging a surface of either mounting component permits translation of the optical device mounting component along the axis of translation with respect to the field helmet. The optical device mounting component is configured to translate along the axis of translation with respect to the field helmet between an extended position and a retracted position, wherein the optical device is proximal to the helmet in the retracted position and distal to the helmet in the extended position.

Abstract: Devices and methods that reduce or eliminate chromatic or comatic variations in the location of the excitation or emission in an optical system such as a confocal microscope, by enhancing parfocality are provided. Such devices include an optical collimator comprising a parabolic reflector and a convex aspheric reflector, wherein the aspheric reflector and the parabolic reflector are positioned such that light is incident at an off-axis angle relative to the axis of symmetry of the reflectors to extend the useable field of view.

Abstract: A lens unit and an image reading apparatus configured to hold an anamorphic lens precisely with a simple structure, without a lens spacing error or eccentric error: the lens unit including a barrel member configured to hold at least one rotationally symmetric lens having a rotationally symmetric shape with respect to an optical axis; an anamorphic lens having at least one anamorphic surface circumscribing an end portion of the barrel member; a coaxiality maintaining device configured to engage the anamorphic lens and the barrel member with each other to align central axes of the anamorphic lens and the barrel member with each other, and arranged relatively rotate the anamorphic lens and the barrel member relative to each other with reference to the aligned central axes of them; and an elastic member configured to push the anamorphic lens against the barrel member.

Abstract: A lens device is provided and includes: a lens barrel body; a lens frame swingably attached to the lens barrel body; and a swing mechanism being adapted to swing the lens frame so that alignment of an optical axis of the lens device can be effected, the swing mechanism including: an elastic unit interposed between the lens barrel body and the lens frame, the elastic unit biasing the lens barrel body and the lens frame in directions away from each other or in directions nearing to each other; and an advancing and retracting unit disposed at three points in a circumferential direction defined by the lens barrel body and the lens frame, the advancing and retracting unit advancing or retracting the lens frame relative to the lens barrel body against a bias force of the elastic unit to swing the lens frame.