Abstract: An optical module having an object side and an image side; the module comprising, from the object side to the image side: a first positive meniscus lens having a convergence C1, made of a material having a refractive index Nd1 and an Abbe number Vd1, a second negative meniscus lens having a convergence C2 made of a material having a refractive index Nd2 and an Abbe number Vd2, a third positive meniscus lens having a convergence C3, made of a material having a refractive index Nd3 and an Abbe number Vd3, a fourth negative lens having a convergence C4, made of a material having a refractive index Nd4 and an Abbe number Vd4, wherein: 1.1<C1/C<1.35 II C1/C2 II>2 0.5<C1/C3<1.1 C1/Vd1<<5.2 II C2/Vd2 II<7 IIå(Ci/Vdi)II<4 with i=1 to 4.

Abstract: The ribbon winding unit is equipped with a first moving gear, a second moving gear, a first intermediate gear, a tumbler gear, and a winding member. The first intermediate gear engages with the first moving gear when the first moving gear and the second moving gear move in a given direction, and disengages from the first moving gear when the first moving gear and the second moving gear move in an opposite direction. The tumbler gear engages with the first intermediate gear, engages with the second moving gear when the first moving gear and the second moving gear move in the opposite direction, and disengages from the second moving gear when the first moving gear and the second moving gear move in the given direction.

Abstract: A pneumatic paintball marker has, for example, a feed system for receiving paintballs from paintball containers having different outlets. The feed system includes a lever and a drive system. The drive system defines an opening through the marker and into the breech. Actuation of the lever moves the opening between at least two positions. The breech receives paintballs from one of the containers when in the first position and from the other paintball container when in the second position.

Abstract: A time recorder includes a first sensor that detects the side edge of a time card having a cut-out formed at at least one corner of the bottom, a second sensor that detects the bottom of the time card, and a card feeding unit that feeds the time card. When the time card is fed by this card feeding unit, a pulse counter of the card feeding unit counts the number of pulses of predetermined pulse signals after the first sensor detects the time card and until the second sensor detects the time card. Next, the front and back faces of the time card are determined based on the number of pulses that is a counting result. Hence, the front and back faces can be determined by the first sensor and the second sensor only.

Abstract: A diaphragm device includes: a board including an opening; a step motor including a teeth portion, and rotatable and stoppable at an interval of a predetermined step angle; a transmitting member including a driven teeth portion meshing the teeth portion, and capable of rotating and stopping in response to a drive force of the teeth portion; a drive ring capable of rotating and stopping in response to a drive force of the transmitting member; and a blade capable of stopping at a receding position to recede from the opening or at an aperture position to cover at least a part of the opening, in response to a drive force of the drive ring.

Abstract: Disclosed is a sport goggle that includes a latching mechanism for a user to quickly release a lens from a frame without tools. The lens is released from the frame by pressing a button surface which bends a spring member in the frame unlocking the lens.

Abstract: A focal plane shutter includes: a board including an opening; a blade opening or closing the opening; an electromagnet including an iron core and a coil for energizing the iron core; and a drive lever holding an iron piece capable of being adsorbed to the iron core, capable of moving such that iron piece is moved into and away from the iron core, and driving the blade, wherein a plating process is performed on the iron core and the iron piece, a Vickers hardness of a plating of the iron piece is greater than that of a plating of the iron core, and a difference in the Vickers hardness between the plating of the iron piece and the plating of the iron core is 100 HV or more.

Abstract: An apparatus for scanning a biometric device includes a camera that scans the biometric device to generate images, and a computer that extracts data from the images. The computer measures three-dimensional locations of at least three different positions on a surface of the biometric device, determines a virtual approximation plane or a curved surface with respect to the surface of the biometric device based on the measured three-dimensional locations, determines imaging locations of two or more panels disposed on the biometric device based on the virtual approximation plane or the curved surface, obtains individual images of the two or more panels by scanning the biometric device based on the determined imaging locations, and extracts overall data of the biometric device from the individual images of the two or more panels.

Abstract: A blade drive device includes: a board including an opening; a blade movable between a position receding from the opening and a position covering at least a portion of the opening; a first actuator including a first rotor rotatable about a first axis and a first stator, and being capable of driving the blade; a second actuator including a second rotor rotatable about a second axis and a second stator, and being capable of driving the blade; first and second positioning portions respectively positioning the first and second actuators; and a first biasing member respectively biasing the first and second actuators toward the first and second positioning portions.

Abstract: The present invention relates to optical fiber pressure sensors. In one embodiment, liquid pressure of an environment may be measured based on capillary action occurring within an optical fiber having one or more hollow columns within. In another embodiment, the change in environmental pressure may be measured based on light diffracted from an optical fiber having optical grating. In either embodiment, the pressure sensor is manufactured from a single optical fiber.

Abstract: The motor speed detection apparatus detects rotational speed of a motor. The apparatus includes an FG coil (21) and a magnet (22) to be relatively moved with rotation of the motor, the FG coil outputting an alternating-current signal to be sampled by the apparatus, an A/D converter (1) to convert the alternating-current signal into a digital signal, an integrator (2) to perform time integration on the digital signal, a first determiner (3, 9) to determine which one of plural threshold ranges includes an integration value obtained by the integrator, a second determiner (3, 8) to determine whether change of the integration value is increase or decrease, and a logical product calculator (3, 10) to produce a binary signal showing a logical product of determination results of the first and second determiners. The apparatus calculates the rotational speed based on a production cycle of the binary signal.

Abstract: A blade drive device includes: a board including an opening; a first blade movable toward and away from the opening, and including: a first slot; and first and second aperture openings each of which is smaller than the opening; a second blade movable toward and away from the opening and including a second slot; a first drive member including a first drive pin that engages the first slot and that is rotatable about a predetermined position; and a second drive member including a second drive pin that engages the second slot and that is rotatable about a predetermined position.

Abstract: Wing pulleys that engage a conveyor belt during conveying operations are described. The wing pulley includes a central reinforcing disk that strengthens and stabilizes the pulley.

Abstract: A paintball loader, more specifically a paintball loader which rapidly and forcibly feeds paintballs to a paintball marker, comprises a rotor body having at least one rotor fin, and a drive motor for rotating said rotor body in a first direction. The paintball loader has a central outlet located radially inwards of the tip of the rotor fin and an abutment body arranged to interact with the at least one rotor fin. When the rotor body is rotated, a paintball, located in a space formed between the at least one rotor fin and the abutment body, is pushed out of the paintball loader through the central outlet.

Abstract: A focal plane shutter includes: a board including an opening; a leading blade and a trailing blade opening and closing the opening; first and second drive members respectively driving the leading blade and the trailing blade; first and second actuators respectively driving the first and second drive members; a first biasing member biasing the first drive member to move the leading blade away from the opening; and a second biasing member biasing the second drive member to move the trailing blade away from the opening.

Abstract: A volumetric error compensation measurement system and method are disclosed wherein a laser tracker tracks an active target as the reference point. The active target has an optical retroreflector mounted at the center of two motorized gimbals to provide full 360 degree azimuth rotation of the retroreflector. A position sensitive detector is placed behind an aperture provided at the apex of the retroreflector to detect the relative orientation between the tracker laser beam and the retroreflector by measuring a small portion of the laser beam transmitted through the aperture. The detector's output is used as the feedback for the servo motors to drive the gimbals to maintain the retroreflector facing the tracker laser beam at all times. The gimbals are designed and the position of the retroreflector controlled such that the laser tracker always tracks to a pre-defined single point in the active target, which does not move in space when the gimbals and/or the retroreflector makes pure rotations.