Abstract: An eyeglass system comprises a base eyeglass set and a cover eyeglass set being carried on the base eyeglass set. The base set includes base lenses and a base bridge connecting the base lenses and hooks connected to outer sides of the base lenses. The cover set includes cover lenses, cover lenses and a cover bridge connecting the cover lenses. Inner portions of the cover lenses are recessed to form inner openings so that each corresponding end of the base bridge is inserted in the inner opening.

Abstract: In spectacles, endpieces are made of a magnetic substance. Attachable sunglasses are provided with mounting portions. The mounting portions include a wirelike member and a magnet holder. First and second attractive portions of the magnet holder are formed so as to be engaged with a corner formed by an upper surface and a front surface of one of the endpieces. A magnet is provided in the first and second attractive portions. The wirelike member is fixed to a rim of the sunglasses. The magnet holder is supported by the wirelike member. The sunglasses are mounted on the spectacles by attracting the first attractive portion to the upper surface and attracting the second attractive portion to the front surface by magnetic force.

Abstract: An eyeglasses includes a lens part, and a frame having a front; the lens part has rearwards extending wings at two ends, and an engaging hole on a middle; each wing has a slot having rear and front sections; the front has a post fitting with the engaging hole, and insertion portions fitting with the slot rear sections on inward sides of two folded ends; stopping portions are formed on the insertion portions, and are shaped such as to be passable through the slot front sections; the stopping portions are longer than the slot rear sections such that the lens can be firmly coupled to the front by means of displacing the lens part rewards relative to the front to insert the post in the engaging hole and fit the insertion portions in respective slot rear sections after the stopping portions have been passed through respective slot front sections.

Abstract: A coupling system for securing a one-piece lens to temples includes a pair of temples, a one-piece lens and a pair of marking blocks. Each temple has a cavity in the outer surface of the front head, a through hole is provided in each cavity, a room is formed in each front head, and each room has a rear end portion. The one-piece lens has both inserting ends, and a hole is provided near each inserting end. Each marking block is made to be a certain configuration, an inserting hook is provided at the rear of each marking block, the bottom end of each inserting hook has a stopping member, and marks or characters may be provided on the front surface of each marking block.

Abstract: A device and method is provided for eye exercise. The eye exercise device includes a housing with colored light sources of at least two different colors in a substantially linear alignment, including a first color which causes the eye to increase its focusing power to gain a sharp image of the first color, and a second color which causes the eye to decrease the focusing power to gain a sharp image of the second color. A controller may control the display of the light sources to an observer. A method of exercising eyes is provided that includes exposing an observer to red and blue light sources, and activating one or more of the light sources to display the light sources to the observer one-at-a-time.

Abstract: An ophthalmological apparatus includes an illuminator for illuminating an eye to be examined; an image pickup device for obtaining the image of the illuminated examined eye; a signal converter for converting a signal from the image pickup device into digital data; and a controller for controlling a system, which controller limits a predetermined operation of other than the image pickup device and the signal converter while the signal converter is performing a conversion operation. The ophthalmological apparatus can take a high-quality photographic image by preventing the occurrence of noise or by reducing noise.

Abstract: A novel visual field test utilizing oscillating visual stimuli is proposed, which may be used to diagnose for eye disorders, such as glaucoma or macular degeneration. Such visual stimuli oscillate in color, polarity, saturation, luminance or intensity. Preferably, the visual test pattern consists of oscillating visual stimuli arranged in a pattern, such as a repeating or grid pattern, covering substantially all of the field of vision being tested. And, may include the use of frequency doubling visual stimuli. In use, the visual field test pattern is positioned in front of the patient so as to cover substantially all of the field of vision being tested, typically about a solid angle of 40° or more. The eye under examination is fixated, and the patient asked to indicate areas where the oscillating visual stimuli are dissimilar, such as by outlining those areas different from the rest of the visual field test pattern.

Abstract: A system and method for providing telemedical direct perimetry and ophthalmoscopy to support optometric providers in the screening, diagnosis, treatment and management of glaucoma patients. The system includes an internet accessible software program inclusive of a data submission and collection module that is a menu-driven series of medical examination menus to guide clinicians through an examination procedure and data entry therefrom. In addition, a data interpretation module is provided in the form of a menu-driven series of guided menu-driven medical diagnostic menus to guide clinicians to a correct diagnosis based on a comparative analysis with visual fields and disk images. A data interpretation module is also provided and this includes an on-line library of authoritative references. A results reporting module is used for generating patient reports for glaucoma diagnosis, treatment and analysis. In addition, a unique disease management module prescribes a prioritized program of glaucoma care.

Abstract: A film trap and gate assembly for use on a motion picture projector. The film trap includes an image aperture and a first and second trap rail assembly. The film trap further includes a stripper plate having an angled stripper blade attached to an attachment flange. The stripper blade is attached to the attachment flange at an at least one degree angle, preferably biased towards the trap body. The film gate includes a projection aperture and a first and second gate rail assembly. A film tensioning assembly is attached to the gate body, the film tensioning device having a deformable body disposing at least two tensioning rollers, and an adjustable tensioning device. When assembled, the film trap and gate assembly forms a film movement channel to guide the film past an illumination source, while reducing the contact between the film strip and the film trap and gate assembly. Consequently, the number of showing of a motion picture film is substantially increased.

Abstract: A liquid crystal projector device, wherein an s-polarization PBS (4) forms light from a light source (1) a set of s-polarization components; an optical unit (7) reflects a green-region light and rotates by 90° the planes of polarization of a blue-region light and red-region light for outputting as p-polarization lights by reflection; a PBS (8) reflects an s-polarization green-region light and transmits p-polarization blue-region and red-region lights which are then separated from each other by a dichroic prism (9); the s-polarization green-region light is modulated into a p-polarization projected image light and reflected by a reflection type liquid crystal sheet (10G) to transmit the PBS (8); the p-polarization blue-region and red-region lights shine on reflection type liquid crystal sheets (10B, 10R) and are modulated respectively into s-polarization projected image lights, reflected and synthesized by the dichroic prism (9) before being reflected by the PBS (8) for projection by a projection lens (11).

Abstract: In a projector device, a plurality of light source each including a lamp and a reflection mirror are arranged in parallel in an opposing relation to each other with optical axes thereof being offset such that light fluxes from the light sources are compressed in the offset direction, respectively. The compressed light fluxes are reflected at right angles by orthogonal reflecting surfaces of a reflection member including reflection mirrors or reflection prisms to form a plurality of parallel emitting lights in one direction. The projector device includes a condenser portion for condensing the parallel emitting lights to a single emitting light flux. The light fluxes from the light sources are passed through a polarizer portion before the incidence on the reflection member or after the emission from the reflection member such that the light fluxes become linear polarized lights having polarizing directions coincident with polarizing directions of liquid crystal panels.

Abstract: The present invention comprises a lamp holder with a lamp inside a casing; at least one guiding surface at the lower edge proximate one side of the lamp holder; a ventilation outlet disposed on the lamp holder at a position corresponding to one side of the guiding surface proximate the casing; an upper sheet at the top of the lamp holder keeping a specific distance from the casing to define an upper air duct; a lower sheet at the bottom of the lamp holder keeping a specific distance from the casing to define a lower air duct and connecting to the guiding surface. A fan proximate one side of the guiding surface for blowing the air through the lamp holder and the upper and lower air ducts, then discharge the hot air from the ventilation outlet for the heat dispersion. Therefore, this invention reducing the temperature of the lamp which near the casing.

Abstract: To provide a projector reduced in size and weight and countermeasures against EMI (Electro-Magnetic Interference) as well. The projector has vertically separable outer cases which accommodate an optical system comprising: a color beam splitting optical system for splitting light from a light source into beams of predetermined colors; an electro-optical device for modulating the color beams split by the color beam splitting optical system in accordance with image information; a color beam combining optical system for combining the color beams modulated by the electro-optical devices; and a projection lens for projecting the resultant beam combined by the color beam combining optical system. These optical components constituting the optical system are attached to a inner case, and the inner case is fixed to a lower case so as to accommodate at least the color beam splitting optical system in a enclosure constituted by the inner case and the lower case.

Abstract: As an imaging prevention method for interfering unauthorized imaging of a number of visual images projected on a screen, there is employed a method for projecting infrared light to a viewer/audience direction from at least one or more infrared light projector devices disposed at a rear side of the screen. According to the method, an amount of infrared light is directly incident into an imaging apparatus whereby increasing the prevention effect causes more infrared light to be directly incident into the imaging apparatus of a person conducting the unauthorized act.

Abstract: On the surface of a light-transmitting plate material 22, a transparent metal thin film 24 is provided, and further, on the surface of the transparent metal thin film 24, a hydrophilic functional layer 26 containing a photocatalytic substance is provided. The hydrophilic functional layer 26 comprises a laminate of, from the side of the transparent metal thin film 24, a photocatalytic layer 28 containing a photocatalytic substance and a hydrophilic layer 30 containing a hydrophilic substance.

Abstract: An array of corner reflectors is used to provide a retro-reflector for a large range of incident angles. A novel orientation of the individual corner reflectors is used. This allows the interior of a first corner to remain visible while the interior of a second corner becomes visible. This may be done while maintaining a phase coherence between the contributions of the first and second corner reflectors. Phase coherence ensures constructive interference among the returns from the first and second corner reflectors. Coherence is achieved by an arrangement which places the interior vertices of the corner reflectors close to each other. One such arrangement also places the peak return from one corner reflector acting as a dihedral between the locations of the dihedral and trihedral returns of a second corner reflector. This arrangement results in a substantially uniform and strong retro-return. Phase coherence may be maintained over a desired range of elevation angles.

Abstract: Equipment on automotive vehicle is controlled by a system including at least one semiconductor light sensor having variable sensitivity to light. Each light sensor generates a light signal indicative of the intensity of light incident on the light sensor. Control logic varies the sensitivity of the light sensor and generates equipment control signals based on received light signals. Sensitivity of light sensors may be varied by changing the integration time for producing charge from light incident on light transducers, by selecting between light transducers of different sensitivity within the light sensor, by using a light transducer with a sensitivity that is a function of the amount of incident light, and the like. Controlled equipment includes devices such as automatically dimming rearview mirrors, headlamps, and moisture removal means.

Abstract: A rearview mirror has a housing. The housing includes a front surface facing a driver's seat, a rear surface at the opposite side of the front surface. The housing has a slot for receiving a recording medium that stores predetermined data. The slot has a width, which is larger than a width of an insert potion that of the recording medium. The recording medium is inserted into the slot at an arbitrary position in the width direction of the slot. An interface performs at least one of reading of data from the recording medium and writing of data to the recording medium. The interface includes a detector, a data input/output unit and a moving mechanism. The detector detects insertion of the recording medium into the slot. The data input/output unit swaps data with the recording medium. The moving mechanism moves one of the data input/output unit and the recording medium to a position where the data input/output unit faces the recording medium.

Abstract: A surface light source device of side light type has a guide plate, a primary light source for supplying illuminating light through an incidence surface, first and second edges at which major surfaces respectively intersect the incidence surface, and one or plural additive members arranged in direct contact with the emission surface and/or the back surface thereon in the vicinity of the first edge and/or the second edge. At least one of the additive members has a shield for preventing illuminating light from being incident to the first or second edge. For example, the shield includes absorptive areas formed on the additive members. Each of the absorptive areas is formed so that each of the absorptive areas crosses the first or second edge. A distal end of a reflector arranged in the primary light source or frame blocks incidence of light to the first and/or second edge. The light incidence block to each edge prevents luminance irregularities in the form of a bright line.

Abstract: An illumination device is provided of the type arranged at the front which is of low power consumption and of high recognisability both when the illumination is turned on and when illumination is turned off. An illumination device arranged at the front face of an illuminated object has a light-guide plate forming a transparent flat plate shape and formed with point-form optical extraction structures on its surface or in a position facing this surface, and a light source arranged opposite and end face of this light-guide plate. The light source is for example a point light source. The optical extraction structures are for example pillar-shaped projections and these are arranged two-dimensionally. The function is provided that, when this illumination device is arranged at the front of the illuminated body, rays are projected on to the illuminated body and rays reflected by the illuminated body are transmitted with scarcely any dispersion.

Abstract: For regularly encounterable walking shoes environments typically having a treaded lower-base and an overlying foot-rest surface, disclosed herein are visual warning devices respectively extending loftily vibratorily helically above the foot-rest surface and topically carrying a visually bright ornamental feature. The bright ornamental feature (preferably of bulbous shape) is alternatively provided as: of self-luminescent characteristic; or alternatively, as an electrically-powerable incandescent bulb powerable from a chemical storage-battery that is rearwardly removably attachable to the walking shoe environment.

Abstract: A lighted line having an elongate flexible wire-formed bulbless light source is encased in a supportive covering which may include a surrounding rope and tubular sheathing. An electrical power source operatively connected to the wire-formed light source is adapted to energize it to produce light which radiates laterally of the line and emanates through the rope and tubular sheathing.

Abstract: LED flashlight with replaceable LED, including: a barrel body in which cells are installed; at least one LED light including a light seat having a conductive section disposed at rear end for electrically connecting with the cells and an LED disposed at front end for electrically connecting with the conductive section, the rear end of the light seat being detachably connected with front end of the barrel section; a switch seat disposed at rear end of the barrel body for electrically connecting with the cells. By means of operating the switch seat, the turning on/off of the LED is controllable. The LED light is replaceable with a new one. The flashlight further includes a flexible conductive connecting assembly one end of which is detachably connected with front end of the barrel body. The rear end of the LED light is detachably connected with the other end of the conductive connecting assembly.

Abstract: A rear pushbutton type switch arrangement for flashlight formed of an aluminum alloy barrel holding a battery set and a lamp assembly, an electrically conducting rotary rear cap provided at a rear side of said barrel and a switch structure is disclosed. The switch structure has an externally threaded, electrically conducting, hollow, cylindrical metal casing connected between the barrel and the rotary cap to hold the other parts of the switch structure firmly in the rotary rear cap so that the other parts of the switch structure do not fall from the rotary rear cap when disconnected from the barrel for a replacement of the battery set.

Abstract: A light straightener for supporting a wire strand of lights separate from adjacent strands to prevent the strands from bunching up. The strands are retained in the straightener so they will not fall out regardless of the orientation of the straightener.

Abstract: Described is an apparatus for a motion activated decorative light connectable to a predetermined article. A housing connects the light to the article. A power source is positioned within the housing for energizing a light source. A switch is connected to the power source and to the light source so as to energize the light source responsive to motion. The housing comprises a material which allows light from the light source to shine through so that it may be seen by a person observing the moving vehicle, and preferably includes a fluorescent material excited by an LED which emits ultraviolet light. The light may comprise an ornamental shape for forming a visually perceptible light image when the light source is energized.

Abstract: A lighting fixture that has a plurality of differently fashioned regions wherein different light emission properties occur. The fixture includes at least one hollow light guide having a cavity, one or more bulbs that emit light into the cavity of the hollow light guide, and at least one light output device having a light-refractive structure for outputting light from the cavity of the hollow light guide to a light exit face. The light output device forms at least a part of the wall of the hollow light guide and the light of at least one bulb that directs light into the hollow light guide is beamed out in different regions of the lighting fixture that have different light emission properties.

Abstract: A lamp apparatus includes a pair of concentrically positioned lamp shades and a light source positioned centrally within an inner one of the lamp shades. The lamp shades are bell shaped so as to direct light from the light source downwardly without passing through either one of the lamp shades. The outer one of the lamp shades is formed of a transparent glass or plastic with a thin film optical coating of randomly variable thickness on its inner surface. The inner one of the lamp shades is formed of a translucent glass or plastic. Standard lamp hardware is used to assembly the apparatus into a functional lamp assembly. When the light source is not illuminated, the outer shade appears as a metallic or chrome color, and when it is illuminated, the outer shade appears transparent and the inner shade appears to have a rainbow colored effect. Downward directed light is not colored.

Abstract: A light assembly and mounting apparatus for attaching fiber optic cable to the sides of a boat or other water craft for safety and enjoyment purposes. The light assembly includes a housing having a light emitter disposed in the housing for emitting light into a fiber optic cable disposed in a bumper guard that is incorporated into a frame member for attachment to the side of the boat. The preferred fiber optic cable is the side-emitting type that will illuminate the fiber optic cable along the entire length of the cable. The frame has a pair of upwardly and inwardly extending side members that securely enclose the bumper guard. A pair of cable guards extend outwardly from the frame beyond the outer surface of the fiber optic cable to protect the cable from damage. A cooling mechanism can be included in the housing to cool the light emitter.

Abstract: Vanity mirrors are provided with a body base member having a mirror, and an illumination member detachably mounted to the body base member. The illumination member includes a lens plate and an elongate lamp tube having one and another terminal ends between which electrical current may pass to illuminate the lamp, and thus the mirror. The illumination member is provided with a planar base plate having a pair of spaced-apart base contact terminals adapted to being connected to lamp circuit leads through which electrical current may be supplied to the lamp tube. The lamp tube is positioned on an upper side of the base plate and has one terminal end thereof soldered to one of the base contact terminals. A contact piece is positioned on the upper side of the base plate and has an end thereof soldered to the other terminal end of the lamp member.

Abstract: A system for adjusting the direction of a light beam from a headlamp assembly comprises a condenser lens which is movable along an arcuate path. As a vehicle turns a corner, the system moves the condenser lens along the arcuate path, so as to direct the light beam in the direction that the vehicle is moving. Because the condenser lens follows an arcuate path, the light beam is not distorted, allowing for greater angular displacement of the light beam.

Abstract: A discharge lamp and a headlight for a motor vehicle are proposed. A moving member is provided, which is movable between at least two positions, for switching over between different light distributions. It comprises at least one optically active element, preferably a lens, which generates an image of the gas discharge which is shifted away from the actual location thereof. A switch-over between two different light distributions is made possible by a movement of the moving member between the two positions in the headlight, such that the gas discharge seems to be shifted by the switch-over for a respective region of the reflector, whereby different light distributions are created. Preferably, the moving member is the outer bulb of the discharge lamp, on which two lenses are arranged and which is rotatable about the optical axis.

Abstract: A vehicular headlamp includes a light source, a reflector for radiating light emitted from the light source forwards, and a cover lens for covering an area in front of the reflector and the light source, wherein the light distribution pattern of the low beam emitted by the vehicular headlamp has a horizontal cut line at least on the side of the opposite lane and wherein a long-distance visibility enchancing portion extending above the horizontal cut line of the light distribution pattern is formed at an end portion of the horizontal cut line.

Abstract: A light pipe includes a plate-like member having light output means formed in its upper surface so that light incident on an incidence side surface of the plate-like member is exited from the lower surface of the plate-like member through the light output means, an adhesive layer having a refractive index lower than that of the plate-like member, and (i) an anti-reflection layer made of a circularly polarizer and bonded to a lower surface of the plate-like member through the adhesive layer or (ii) a light-diffusing layer having a surface of fine prismatic structures and bonded to a lower surface of the plate-like member through the adhesive layer. A plane light source unit includes at least one light source disposed on one side surface of the light pipe. A reflection type liquid-crystal display device includes the plane light source unit and a liquid-crystal cell including a reflection layer disposed on the light output side of the plane light source unit.

Abstract: Apparatus for mixing aqueous foam with a slurry of gypsum and water. A cylindrical housing includes, in its upper end, an inlet for a slurry and a helical diverter for directing the slurry in a downward spiral flow path. An inlet for aqueous foam in located in said diverted and directs the foam into the incoming slurry. An annular flow restrictor is located in the lower end of the housing. Turbulence resulting from diversion of the incoming slurry from linear flow to a downward spiral flow path and from changes in spin diameter and speed through the flow restrictor uniformly mix foam with the slurry.

Abstract: An apparatus for providing a secondary seal on mixers and other rotating equipment that includes a stop assembly and a collar which cooperate to minimize translational movement of a mixer shaft during shutoff and to form a reversible seal between the vessel and the shaft. The apparatus provides a sealing engagement between the mixing vessel and the rotatable shaft of a mixer offering improved safety during mechanical seal replacement.

Abstract: Two or more independent and offset fluid transporting fractals allow the scaling and intermingling of two or more fluids separately and simultaneously prior to contacting the fluids with one another. The device provides rapid and homogeneous mixing and/or reaction.

Abstract: The verification of accuracy of an IR thermometer is provided at any temperature in the range of −25° C. to +100° C., preferably at the room temperature. The magnetic surface of a thermo-conductive mat of the present invention is applied to any metallic surface in a room. The user waits to give the contact thermometer arranged on the mat time to reach thermal equilibrium, and then aims the beam of the IR thermometer at the black body target on the mat. The reading of the IR thermometer is then compared with the reading of a contact thermometer, which is attached to the mat adjacent to the black body target. The lightweight, portable, low-cost temperature verification mats of the present invention can be used for verification of IR thermometers in different customer environments, such as in industrial environments, and with retail equipment, or home appliances, including ovens and freezers, etc.

Abstract: The system and method for testing thermal insulation uses a cryostatic insulation tester having a vacuum chamber and a cold mass including a test chamber and upper and lower guard chambers adjacent thereto. The thermal insulation is positioned within the vacuum chamber and adjacent the cold mass. Cryogenic liquid is supplied to the test chamber, upper guard and lower guard to create a first gas layer in an upper portion of the lower guard chamber and a second gas layer in an upper portion of the test chamber. Temperatures are sensed within the vacuum chamber to test the thermal insulation.

Abstract: The invention relates to an infrared thermometer wherein control means signal or determine a correct positioning of the intensity transducer tasked with measuring the infrared radiation emitted by the patient whose temperature needs to be known.

Abstract: A dental x-ray block to eliminate sheets of lead foil from dental x-ray film packets and to inhibit unnecessary x-ray exposure as well as backscattered reflections that can obscure x-ray images and methods of manufacturing and using the same. The dental x-ray block comprises a mouthpiece and a packet holder, which is coupled with the mouthpiece and configured to receive and engage a dental x-ray film packet. Being configured to significantly attenuate and/or absorb x-rays, an attenuation member is coupled with the dental x-ray block and is substantially in axially alignment with the dental x-ray film packet. Therefore, after the dental x-ray film packet has been exposed to a primary x-ray beam, the primary x-ray beam is significantly attenuated by the attenuation member to inhibit unnecessary x-ray exposure and secondary exposures due to backscattered reflections from obscuring x-ray images.

Abstract: A universal X-ray device has a movably suspended holder at which an X-ray radiator and a radiation detector are arranged, with the radiator being mounted so as to be pivotable around at least one axis perpendicular to the plane of the holder, and with the detector being displaceably mounted in the detector plane.

Abstract: A flexible container for liquids including an outer shell, an inner liner and an intermediate structure in which the intermediate liner is coupled to the outer shell to maintain a cross-sectional profile and the volume of the inner liner is greater than the enclosed volume of the intermediate structure. Liquids are loaded into a flexible container wherein the container is lifted by straps so that the container hangs freely, the container is filled with the liquid, the filling tube is sealed, the sealed tube is placed between the outer shell and stabilizing straps on the outside surface of the outer shell and the flexible container is then rested on a surface, trapping the filling tube between the outside surface and strap so that the container is securely sealed.

Abstract: A rolling ball separator structure of a linear drive member includes multiple separators mounted between the multiple rolling balls and each having a body and an outer ring structure. Thus, the body may be deformed elastically, thereby preventing the multiple separators from interfering with the return face of the rolling path during the returning process of the rolling balls, and thereby absorbing the gap variation of the uneven force during the returning process of the rolling balls, and the outer ring structure may maintain the relative position of the rolling balls, so that the rolling balls will not collide directly during the returning process.

Abstract: An axle bolt has a shaft with a pair of opposed ends. An axle passage extends within the shaft and a transverse passage extends radially outwardly from the axial passage. A head attached to one end of the shaft has an outer face. A recess extends in from the outer face and the bottom of the recess is in communication with the axial passage. A lubrication fitting in the recess has one end in communication with the bottom of the recess and another end designed to be connected to a lubrication device. The recess in the bolt head is sufficiently deep that the second end of the lubrication fitting is within the recess and does not extend beyond the outer face.

Abstract: A bearing for use in a water pump or similar apparatus and a method of assembling the bearing. The bearing has a stepped shaft and a counterbored raceway at the fan or pulley end which allows for use of a larger number of balls in the raceway at the fan or pulley end, and which allows for using larger balls at the impeller end. The method of assembly of the bearing includes assembling balls and a cage to form a ball and cage assembly, assembling ball and cage assembly into the outer race at its pulley end, then sliding the shaft, impeller end first, into the outer race through the pulley end such that the first inner raceway and the first balls align with the first outer raceway. The shaft is then displaced in a direction perpendicular to its axial centerline within the outer race. A second plurality of balls is inserted onto the shaft within the outer race at its second outer raceway end, and a second cage is inserted over the shaft and within the outer race to surround the second plurality of balls.

Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm≧0.025 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.

Abstract: A roller chain incorporating the roller bearings wherein a plurality of rollers are disposed between a roller that functions as an outer ring and a bush that functions as an inner ring comprises a substantially ring-shaped retainer disposed on both ends of the roller respectively. The retainer includes a plurality of pockets for guiding at least a part of each of the rollers on the inner side of the retainer.

Abstract: A method for assembling a population of ferrules to minimize the eccentricity of the fibers typically includes the steps of selecting a set of ferrules, determining the eccentricity of the ferrules, selecting a fiber, inserting the fiber within the ferrule bore, orienting the fiber within the ferrule, and securing the fiber in place. The result is a population of ferrules that can be mated with little or no insertion loss.

Abstract: A connector assembly for securing and optically aligning one or more optical fiber arrays, each optical fiber array having a plurality of optical fibers having an outer surface. The connector assembly includes a base having fiber receiving features configured to receive and align the plurality of optical fibers; and a retaining element that covers at least a portion of the alignment features and secures the plurality of optical fibers against the alignment features. The retaining element has a first contact surface that contacts the plurality of optical fibers, where the contact surface is able to conform to the outer surfaces of the plurality of optical fibers.