Abstract: An electrophoretic display device includes a substrate, an electrophoretic component layer, a first optical adhesive, a barrier layer, a second optical adhesive, a protective layer, and a sealant. The first optical adhesive and the second optical adhesive contribute in helping to provide light exposure to the sealant. One of the first optical adhesive and the second optical adhesive is capable of absorbing the light of predetermined wavelength and is adapted to expose the sealant.

Abstract: Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal, the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between the backplane and the protective sheet. In other seals, the protective sheet is secured to the backplane or to a second protective sheet adjacent the backplane. The electro-optic layer can also be sealed between two layers of adhesive or between one layer of adhesive and the backplane. Other seals make use of flexible tapes extending around the periphery of the display.

Abstract: Various types of edge seals for protecting electro-optic displays against environmental contaminants are described. In one type of seal, the electro-optic layer is sandwiched between a backplane and a protective sheet and a sealing material extends between the backplane and the protective sheet. In other seals, the protective sheet is secured to the backplane or to a second protective sheet adjacent the backplane. The electro-optic layer can also be sealed between two layers of adhesive or between one layer of adhesive and the backplane. Other seals make use of flexible tapes extending around the periphery of the display.

Abstract: The present invention is directed to a display device which comprises two layers of insulating substrate, at least the substrate on the viewing side is transparent, an array of display cells sandwiched between the two layers of substrate, a writing means, and optionally an erasing means to magnetically or electrically erase the image. The display cells are filled with a dispersion of magnetic particles which may be charged or non-charged. The display of the invention eliminates the use of the transparent conductor film, such as ITO, on the viewing side. Therefore, the displays of this invention are more cost effective, more flexible and durable and capable of higher image contrast ratio and higher reflectance in the Dmin area.

Abstract: A laser device having a semiconductor gain element optically coupled to an optical fiber by using an angled anamorphic fiber lens and including a wavelength-selective front reflector. The laser device possesses improved output characteristics such as a highly linear laser emission output, even when the amplification section produces a high amount of gain. Such a laser source can also be used in various applications such as pump lasers for fiber amplifiers or frequency doubling systems.

Abstract: A change in loading conditions of fiber amplifiers in an optical communications network causes rapid variations in the gain profile of the amplifiers due to spectral hole burning and stimulated Raman scattering. An apparatus for reducing such gain profile variations is described which monitors optical signal perturbations and reacts by adjusting pump powers of the amplifiers and, or fast variable optical attenuator according to a pre-determined function stored in the form of constants in controller's memory. The optical signal is monitored as total power, and the power of light after passing through one or more optical filters. The light detection is relatively fast, whereby the gain profile variations are compensated by fast controlled variable optical attenuator and pump power adjustment upon the change in loading conditions.

Abstract: A method and apparatus for providing a high peak power optical beam. The method includes interleaving pulse trains of different wavelengths and spatially and temporally overlapping the different wavelengths to produce an amplified output beam with very high peak power.

Abstract: A twin fiber laser arrangement is configured with active and passive fibers supporting respective signal and pump lights and a reflective coating surrounding the fibers along a section of the arrangement. The passive fiber has regions covered by respective protective layer and coating-free regions alternating with the layer covered regions, wherein the reflective coating is configured to overlap the protective layer which shields the end of the reflective coating from high power pump light.

Abstract: An optical amplifier includes an optical fiber which includes a core in which the signal light is propagated and with which a rare-earth element is doped; a laser that is optically coupled to an end of the optical fiber, providing the optical fiber with an excitation light; and a filter which is formed in the optical fiber and removes a light within a wavelength range, from the core, among lights propagated in the core, wherein the filter comprises a first filter that is arranged at a stage of the optical fiber and removes a first light in a first wavelength range, and a second filter that is arranged at a subsequent stage of the optical fiber and removes a second light in a second wavelength range, wherein a wavelength of the second light is longer than a wavelength of the first light.

Abstract: One embodiment of the present method and apparatus encompasses an apparatus that may have: a predetermined length, the self-imaging semiconductor waveguide having first and second opposed sides; quantum wells disposed within the self-imaging semiconductor waveguide along the length of the self-imaging semiconductor waveguide, the quantum wells being formed of a quantum well gain material; microchannel cooler that extends substantially the width of the self-imaging semiconductor waveguide, the microchannel cooler located adjacent the first side of the self-imaging semiconductor waveguide; and a plurality of pump arrays arranged along the microchannel cooler opposed from the first side of the self-imaging semiconductor waveguide; wherein the quantum well gain material is photopumped through the microchannel cooler.

Abstract: The present invention relates to a polymer composition which absorbs infrared (IR) radiation, containing a transparent thermoplastic plastic, an inorganic infrared absorber and at least one inorganic nano-scale pigment, and to the preparation and use of the polymer compositions according to the invention, and to products produced therefrom. In particular, the present invention relates to polymer compositions comprising a. at least one transparent thermoplastic material; b. at least one inorganic IR absorber which comprises a tungsten compound and wherein the IR absorber is present in an amount of from 0.0075 wt. % to 0.0750 wt. %, calculated as solids content of tungstate in the total composition; and c. at least one inorganic, nano-scale pigment present in an amount of from 0.0005 wt. % to 0.0035 wt. %, based on the total composition; and d. optionally further additives.

Abstract: Provided are methods for making a product having a three-dimensional surface. The method includes providing a base material, providing an adhesive layer and positioning the adhesive layer relative to the base material. The method includes providing a three-dimensional sheet having a top surface and a bottom surface, the top surface having a convex lens layer. The three-dimensional sheet is positioned relative to the base material based on a registration of an image on the three-dimensional sheet and is secured to the base material using the adhesive layer. Securing the three-dimensional sheet to the base material can include applying pressure to the three-dimensional sheet in successive steps of increasing pressure. Also provided is a product having a three-dimensional surface that includes a base material, a three-dimensional sheet, and an adhesive layer disposed between the base material and three-dimensional sheet and configured to secure the three-dimensional sheet to the base material.

Abstract: A leaky-mode resonant retarder is described. The retarder may include a substrate and a spatially modulated periodic layer coupled to the substrate, where the spatially modulated periodic layer is configured to shift a phase between two perpendicular electric-field components of incident light. The retarder may operate as a half-wave plate or a quarter-wave plate.

Abstract: An imaging lens having reduced susceptibility to thermally-induced stress birefringence for imaging an object plane to an image plane; comprising: an aperture stop positioned between the object plane and the image plane; a first group of lens elements located on the object plane side of the aperture stop; and a second group of lens elements located on the image plane side of the aperture stop; wherein the lens elements immediately adjacent to the aperture stop are fabricated using glasses having a negligible susceptibility to thermal stress birefringence as characterized by a thermal stress birefringence metric; and wherein the other lens elements in the first or second groups of lens elements are fabricated using glasses having at most a moderate susceptibility to thermal stress birefringence as characterized by the thermal stress birefringence metric.

Abstract: A vapor-permeable, vented eyecup for night vision goggles and other optical devices having an eyepiece. An eyecup is used to create a light tight seal between the eyepiece and the operator's face. In addition to containing the light from the optical device, the eyecup blocks out external light. When viewing through an optical device using a non-vented eyecup, moisture becomes trapped in the eyecup volume bounded by the operator's eye socket, eyecup, and eyepiece. Fog forms on the eyepiece as a result. This invention reduces the occurrence of fogging by allowing moisture to vent out of the volume through a vapor permeable material. This material allows vapor to pass but blocks larger water droplets, dust, dirt, and light.

Abstract: The structure, manufacturing method, and applications of a reflective material are disclosed. The disclosed reflective material is a color reflective material having a composite layered structure made by sequentially stacking a PET film, a PU layer, micro glass beads, another PU layer, a highly light-permeable color layer, an elastic PU layer, a metallic reflective layer, another elastic PU layer, and an adhesive layer. The reflective material is applicable to safety helmets, reflective clothing, and reflective signs.

Abstract: An exposed lens retroreflective article that includes a binder layer; a layer of spaced apart optical elements that are partially embedded in the binder layer; a penetrated colored layer that is located between the spaced apart optical elements; and a reflective layer that is located functionally behind the layer of optical elements and the penetrated colored layer.

Abstract: An image stabilizing apparatus for correcting an image shake by moving an optical element arranged in a lens barrel in a plane orthogonal to an optical axis includes a first rolling holder configured to support a first rolling member so as to be capable of rolling in a first direction orthogonal to the optical axis, the first rolling member moving the optical element in the first direction, and a fixed member attached to a surface of the first rolling holder and providing support for the lens barrel, the first rolling member being provided on the surface.

Abstract: Provided is an optical apparatus including: an image shake correcting unit for canceling an image shake generated due to a vibration; at least two angular velocity sensors having axes for detecting an angular velocity, the axes being parallel to each other; a vibration angle computing unit for calculating a vibration angle output based on output of the at least two angular velocity sensors; and a driving unit for driving the image shake correcting unit according to the vibration angle calculated by the angle computing unit.

Abstract: A method of producing a diffractive optical element comprises forming on a textured surface of a first substrate (2) a predetermined pattern of an ink (3) including an activator for a metallisation reaction and one or more binders; causing or allowing the binder to solidify; applying a first adhesive layer (4) on top on the solidified binder and activator; securing a second substrate (5) to the adhesive layer; removing the second substrate with adhered solidified binder and activator from the first substrate; and forming a metal coating (10) onto the activator-containing regions adhered to the second substrate.

Abstract: Methods of fabricating a static interferometric image device and static interferometric image device formed by the same are disclosed. In one embodiment, a method includes providing a substrate. A plurality of liquid layers are formed over the substrate by an inkjet process such that the layers are lateral to one another. The liquid layers contain a solidifiable material or particles. Then, the plurality of liquid layers are solidified to form a plurality of solid layers. In some embodiments, the substrate includes pre-defined cavities, and the liquid layers are formed in the cavities. In other embodiments, the substrate includes a substantially planar, stepped, or continuously transitioning surface, and the liquid layers are formed on the surface. The inkjet process provides optical fillers or spacers for defining interferometric gaps between absorbers and reflectors in the display device, based at least partially on an image that the display device is designed to display.

Abstract: A head mounted display includes a display unit, a concave mirror, an optical unit that is arranged between the display unit and the concave mirror, transmits a part of incident light from the display unit and reflects the other part of the incident light from the display unit, a first optical system that guides light reflected by the concave mirror to the left eye, and a second optical system that guides light reflected by the optical unit to the right eye. In the head mounted display, on the concave mirror, a right end is closer to the display unit in comparison with a left end. Further, the curvature of the concave mirror at the right end is larger than the curvature of the concave mirror at the left end.

Abstract: For combining light from different light sources that are spatially apart, an optical system comprises a prism assembly that comprises a totally-internally-surface and a dichroic filter. The totally-internally-surface and the dichroic filter are configured for reflecting light of different colors or polarizations, so as to combine light of different polarization or colors into a single beam.

Abstract: A fixed-focus lens disposed between a magnified side and a minified side. The fixed-focus lens has an optical axis and includes a reflective system and a refractive system. The reflective system includes a reflection mirror with a negative refractive power. The refractive system is disposed between the reflection mirror and the minified side and includes a first lens group and a second lens group. The first lens group has a positive refractive power. The second lens group is disposed between the first lens group and the minified side, and has a positive refractive power. The fixed-focus lens satisfies F/H>0.23, where F is an effective focal length and H is an image height.

Abstract: An optical lens which, in a controlled manner, and without altering either the resolution or luminous capture, helps to extend the depth of field of any other optical system. The optical lens of the present invention is composed of two optical lenses that form a pair. Each of the lenses of the pair produces a change of optical path with a symmetrical distribution. If there is no relative displacement, the lenses of the pair generate an optical path difference equal to zero. When there is relative displacement, the lenses of the pair generate a change of optical path with asymmetric distribution, which helps to extend the depth of field without reducing either the resolution or luminous capture. The optical lens of this invention, in the form of an optical pair, serves any other optical system to capture images without loss of modulation, but with attenuated modulation which can be retrieved with digital processing algorithms known in the art.

Abstract: An imaging apparatus is compensated for its movement during image acquisition of an object by acquiring the image through a lens subassembly in the apparatus which includes a liquid lens, sensing movement of the apparatus during image acquisition, and controlling the liquid lens to compensate for the effects on the image of movement of the apparatus. Preferably, the liquid lens is controlled so as to change its focal length.

Abstract: A teleconverter lens system is attachable to or detachable from an object side of a main lens system and facilitates performing telephotographing. A photographing apparatus includes the teleconverter lens system. The teleconverter lens system includes: a first lens having a negative refractive power; a second lens having a positive refractive power; a third lens having a negative refractive power; and a fourth lens having a positive refractive power, wherein the first, second, third, and fourth lenses are sequentially arranged from an object side to an image side of the teleconverter lens system. The first and second lenses are cemented together, and the second lens has a meniscus shape in which a convex surface is formed on the object side of the second lens.

Abstract: A zoom lens system includes a negative first lens group, a diaphragm, and a positive second lens group. The following conditions (1) and (2) are satisfied: 5.2<(d12W?d12T)/(mT/mW)<7??(1), and 0.3<SF<0.7??(2), wherein d12W and d12T designate the distance from the surface closest to the image side of the first lens group to the surface closest to the object side of the second lens group, at the short and long focal length extremities, mT and mW designate the lateral magnification of the second lens group at the long and short focal length extremities, SF designates the shape factor of the positive lens element closest to the object side within the second lens group, and R2 and R1 designate the radius of curvature of the surface on the image side and object side, respectively, of the positive lens element closest to the object side within the second lens group.

Abstract: A zoom lens includes a first variable refractive power element that changes a refractive power thereof in a positive direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end; and a second variable refractive power element that changes a refractive power thereof in a negative direction by changing a shape of an interface between different media during zooming from a wide angle end to a telephoto end. An imaging magnification of at least one of the variable refractive power elements increases during zooming from the wide angle end to the telephoto end. Variations in chromatic aberration and other distortions are controlled when predetermined conditional expressions are satisfied.

Abstract: The present invention is a variable power zoom lens that is suitable to APS-format single-lens reflex cameras. The zoom lens has the foremost or first lens group G1 of positive refractivity, the second lens group G2 of negative refractivity, the third lens group G3 of positive refractivity, and the fourth lens group G4 of positive refractivity disposed in sequence from a position closer to the object toward the image plane, and it meets requirements as defined in conditional formulae as follows: 6<Lw/(Ft/Fw)<10 where Lw is the entire length of the lens optics (i.e., from the front surface of the foremost lens piece to the image plane) at the wide-angle end, Ft is a focal length of the lens optics in whole at the telephoto end, and Fw is the focal length of the lens optics in whole at the wide-angle end.

Abstract: A zoom lens, including: a front lens group; an aperture stop; and a rear lens group, in which the rear lens group includes: a front lens unit and a rear lens unit, a maximum air interval of the rear lens group being interposed between the front lens unit and the rear lens unit, in which the rear lens unit includes: a first lens which is located on the most object side; a second lens which is located on the most image side, and the following conditional expressions are satisfied: ?6.0?fs1/frr??1.0; and ?9.0?fs3/frr??2.0, where frr indicates a focal length of the rear lens unit, and fs1 and fs3 indicate a focal length of the first lens and a focal length of the second lens, respectively.

Abstract: A lens barrel that is capable of miniaturizing an image pickup apparatus by decreasing an area that is occupied by transmission mechanisms. A lens group is movable along a first optical axis. A cam barrel moves the lens group. A first transmission mechanism transmits a driving force of a driving source to the cam barrel. A bending optical element is movable along a second optical axis that intersects the first optical axis. An element driver moves the bending optical element between a taking position and an escape position along the second optical axis. A second transmission mechanism transmits a driving force of a driving source to the element driver. The second transmission mechanism is arranged within an arrangement area of the first transmission mechanism when viewing in the direction of the first optical axis.

Abstract: A focus adjustment device for adjusting a focus state of a projection lens unit in an image projection apparatus is provided. The focus adjustment device includes a focus adjustment member rectilinearly movable in a first direction; a rotational shaft; a first movement-converting member for converting a rectilinear movement of the focus adjustment member into a rotary movement of the rotational shaft; and a second movement-converting member for converting the rotary movement of the rotational shaft into in a rectilinear movement of the projection lens unit along a focusing direction.

Abstract: In order to obtain stable lens positions to have an object imaged in focus when the temperature of lenses changes, an imaging device of the present invention comprises a system control section 60 having a imaging mode and a correction mode, the imaging mode in which a group of lenses 10 are controlled and moved to focusing positions for a predetermined distance at first and are further moved to correct the focusing positions for the predetermined distance to the object during imaging according to the temperature compensation data, the correction mode in which the group of lenses 10 are controlled and moved to have the temperature compensation data corrected when the temperature change is larger than or equal to a predetermined temperature difference, a correction coefficient calculation section 50 for calculating the correction coefficient to correct the temperature compensation data based on first focusing positions of the group of lenses to which the group of lenses are moved according to the temperature co

Abstract: An optical module includes a first optics group, a second optics group, and an image sensor, wherein the first optics group and second optics group are configured to provide an image having a focus and a magnification to the image sensor. In some embodiments of the present invention, a first optics assembly includes a first optics group coupled to a threaded portion of a first lead screw so that rotation of the first lead screw results in translation of the first optics group along an axis of the first lead screw, a first actuator for rotating the first lead screw; and a first sensing target configured to permit detection of rotation of the first lead screw.

Abstract: An optical element mount has an inner member suspended within an outer member by a number of flexures. A first translational actuator is movable within the outer member and coupled to the inner member by a first shaft and is actuable to translate the inner member along a first substantially linear travel path within a translation plane that is orthogonal to an optical axis. A second translational actuator is movable within the outer member and coupled to the inner member by a second shaft and is actuable to translate the inner member along a second substantially linear travel path within the translation plane. A rotational actuator is movable within the outer member and coupled to the inner member by a third shaft and actuable to rotate the inner member about an instant point of rotation that is defined at the intersection of the first and second linear travel paths.

Abstract: A vibration actuator having excellent driving performance, a method for manufacturing the vibration actuator, a lens barrel and a camera. The vibration actuator is provided with: an electromechanical conversion element which converts an electric energy into a mechanical energy; an elastic body which generates vibration waves by oscillation of the electromechanical conversion element; a resin layer, which is formed of a conductive thermoplastic resin and bonds the electromechanical conversion element and the elastic body with each other; and a relatively moving member which is brought into contact with the elastic body with a pressure and is relatively moved to the elastic body by vibration waves.

Abstract: A micromechanical component has a holding device and an adjustable component, which is adjustable with respect to the holding device at least from a first position into a second position, and which is connected via at least one spring to the holding device. The micromechanical component also includes at least one silicide-containing line segment situated on the at least one spring.

Abstract: The subject is an exterior rear view mirror with at least one base support and a carrier plate holding the mirror glass, adjustably arranged in relation to the base support. At least one friction bearing is provided between the carrier plate and the base support, which includes at least one friction spring arranged on the carrier plate, projecting in the direction of the base support, with at least one first guide support and at least one second guide support assigned to the base support. The first and second guide surfaces come into contact with each other. A slot, arranged on the base support, assigned to the friction spring, comprises a receiving opening, into which the friction spring is inserted. The receiving opening is bordered by at least one wall, which forms at least a second guide surface of the friction bearing.

Abstract: A magnetic tape apparatus performs at least one of data reading processing and data writing processing on LTO wound around a reel. The magnetic tape apparatus causes the reel to rotate and move the LTO to a position at which the data writing processing or the data reading processing can be performed by a magnetic head. The magnetic tape apparatus is arranged along the width direction of the magnetic tape of LTO, which is driven, to detect medium abnormality that occurred in either a start-end or a stop-end in the width direction of the magnetic tape.

Abstract: According to one embodiment, a storage device includes a recording medium, a driving module, a head, a conductive body, a write-verify module, and a projection amount controller. A conductive body is mounted on the head, and changes a projection amount of the head by thermally expanding the head with heat from a current carried by the conductive body. The write-verify module executes a write-verify check to check whether content written in any location on the recording medium is correct when the driving module starts rotating the recording medium. The projection amount controller controls the projection amount of the head by adding a first value to a current in a steady state carried by the conductive body if the content is correct, and adding a second value with an absolute value greater than that of the first value to the current in the steady state if the content is not correct.

Abstract: According to one embodiment, a magnetic disk includes a disk, a controller and an indicator module. The disk includes a plurality of data sectors. The controller is configured to control data rewrite for reading a first data block stored in the disk and writing a second data block corresponding to the read first data block to a write destination on the disk. The indicator module is configured to embed an indicator indicative of an attribute relating to data rewrite in each sector data in the second data block written to the write destination when the each sector data is written to the write destination.

Abstract: A disk drive is disclosed comprising a plurality of disk surfaces and a plurality of corresponding heads. The disk drive further comprises a preamp including a first integrated circuit coupled to a first plurality of the heads. The first integrated circuit comprises a first read-output for outputting a preamplified read signal, a first write-input for receiving a first write signal, a write-output-passthrough for outputting a passthrough write signal in response to the first write signal, and a read-input-passthrough for receiving a passthrough read signal. The preamp further comprises a second integrated circuit coupled to a second plurality of the heads, wherein the second integrated circuit comprises a second read-output for outputting the passthrough read signal, and a second write-input for receiving the passthrough write signal.

Abstract: Methods and apparatus are provided for detection of a synchronization mark based on a position of an extreme distance metric. A synchronization mark is detected in a received signal by computing a distance metric between the received signal and an ideal version of the received signal expected when reading the synchronization mark, wherein the distance metric is computed for a plurality of positions within a search window; determining a substantially extreme distance metric within the search window; and detecting the synchronization mark based on a position of the substantially extreme distance metric. The distance metric can comprise a sum of square differences or a Euclidean distance between the received signal and the ideal version of the received signal.

Abstract: According to one embodiment, a data write control apparatus includes a magnetic disk, a write controller, and a retry controller. The magnetic disk includes a track in which data is recorded in sector unit. The write controller is configured to execute control to write a sector data block to a predetermined sector in the track. The retry controller is configured to execute control to retry a write process to a predetermined number of sectors to which data has been written and which include a first sector, and to manage the number of retries performed on each sector.

Abstract: A device for implementing thermally assisted magnetic recording, using a TE mode laser diode, and method for using it, are described. This device is shaped internally so as to provide three-dimensional self-focusing of plasmon radiation, thereby improving the coupling efficiency between the optical wave-guide and the plasmon generator as a result of ensuring a large overlap between these two modes.

Abstract: According to one embodiment, a recording medium controller includes a recording medium, an input module, a reading module, and a writing module. The recording medium includes a write area and an escape area. The write area includes track groups. Each of the track groups is a unit for writing data and includes tracks. The input module receives a write command for data. The reading module reads data stored in the escape area and data from a first track group of the track groups. The writing module writes data received for the write command to the escape area, and writes merged data obtained by merging the data read from the escape area and the data read from the first track group to each track of a second track group of the track groups by using a shingle recording technique in which adjacent tracks are partly overlapped with each other.

Abstract: A magnetic tape driving apparatus, which does not cause damage to either a magnetic head or a magnetic tape when making transition of the magnetic tape from a stopped state to a running state, when making transition of the magnetic tape from a running state to a stopped state, or when reversing the transportation direction of the magnetic tape, is provided. In a state where any one of a magnetic head and a magnetic tape moves and the other rests (i.e., a state where static friction may occur), such as at the time of starting transportation of the magnetic tape, at the time of stopping the tape in a running state, and at the time of reversing the transportation direction of the magnetic tape, a head displacing portion vibrates the magnetic head under the control by a displacement control portion, and thus no static friction occurs between the magnetic head and the magnetic tape.

Abstract: A modified hard disk drive (HDD) state is provided. The modified HDD state corresponds to a state wherein the heads of a hard disk drive assembly are parked as a baseline setting, but permitted to float over the platters for completing requests on a limited basis. This prioritizes HHD protection in certain contexts.

Abstract: A disk-enclosure cover for a low-profile, hard-disk drive (HDD). The disk-enclosure cover includes a substantially flat, plate-like portion that includes a periphery, and a peripheral flange that is disposed at the periphery. The peripheral flange includes a recessed portion that is configured to be recessed from a SATA connector in proximity to the SATA connector. In addition, the recessed portion is configured to allow a top portion of the SATA connector to be disposed in close proximity to the peripheral flange when the SATA connector is seated on a receiving connector of the low-profile HDD.