Abstract: An optical switch has an input section for inputting a light beam and movable optical members each comprised of a piezoelectric actuator for inputting the light beam from the input section and for individually switching an optical path of the light beam. Each of the piezoelectric actuators has a piezoelectric body for undergoing oscillating movement and a movable body frictionally driven by oscillating movement of the piezoelectric body. A driving control device drives the piezoelectric bodies of the piezoelectric actuators and controls positions of the piezoelectric bodies to switch the optical path of the light beam. An output section outputs the light beam from the piezoelectric actuators.

Abstract: An optical function module comprises a collimator block having a substrate, at least two collimators disposed on the substrate in confronting relation to one another for collimating a light flux directed along a preselected path between the collimators, and support members each for supporting a respective one of the collimators on the substrate. An optical function device is removably connected by a connecting structure to the collimator block so that the optical function device is positioned along the preselected path of the light flux between the collimators.

Abstract: A highly reliable optical communications equipment is offered, which can control light more accurately than heretofore (i.e., less restrictions are imposed on the amount of attenuation and on the resolution) and which is equipped with a latching function. The optical communications equipment includes a piezoelectric actuator, a moving body moved by the piezoelectric actuator as a drive source, a multi-coating filter for controlling light that is a signal medium by movement of the moving body, a drive circuit for controlling the position of the multi-coating filter via the actuator, and a control circuit. The piezoelectric actuator uses bending vibrations produced in a piezoelectric vibrating body as a power source. If the moving body is not moved for a given time, the control circuit sends a function keeping signal to drive the actuator to such an extent that the moving body does not move. Thus, the function of the actuator is maintained.

Abstract: The optical spatial switch of the present invention is has a small size and a large capacity to switch optical signals between a plurality of optical fibers in the field of optical communications.

Abstract: An optical fiber connector has a stop ring having an end portion having an outer periphery and an optical fiber cable having a strength member extending from an end thereof. An adhesive material is disposed over the end portions of the stop ring and the optical fiber cable so that at least a portion of the strength member of the optical fiber cable is embedded in the adhesive material. A heat-shrinkable tube has an inner surface and is disposed on the adhesive material so that the portion of the strength member is disposed between the inner surface of the heat-shrinkable tube and the outer periphery of the stop ring.

Abstract: To provide an optical function module in which an optical functional part may easily and rapidly be displaced in a position where the optical functional part work exactly and parts may easily be exchanged and reused, an arrangement unit (105) provided on a substrate (104) with a recess portion and a holder base engaged exactly with the recess portion for disposing an optical functional part (124) so as to exactly work on a light flux (106) between collimators (101) and (101′).

Abstract: An optical functional module collimator block capable of easily adjusting the position and/or direction of collimators opposed to each other and capable of correcting an error in the position or direction. The collimator module has an adjusting device for optical axis alignment between two collimators held by holding members on a base member in a state of being opposed to each other. The adjusting device includes fixing screws for fixing at least one of the holding members on the base member, and adjusting screws for adjusting the position and/or direction of the holding member.

Abstract: To provide an optical switch which is compact and having high productivity. An optical switch including an input section for inputting a light beam, optical parts having an optical path changing characteristic movable to positions of blocking the light beam, output sections provided respectively in correspondence with a case in which an optical path is changed by the optical part and a case in which the optical path is not changed by the optical part, driving means for separately driving the optical parts and driving control means for controlling to arrange the optical parts via the driving means and selecting the output sections constituting output destinations of the light beam.

Abstract: To provide a ferrule tubular body and a ferrule which is free from a fear that the end face of the ferrule may be roughened, which can eliminate an eccentric adjustment process performed after an optical fiber is fixed, and which can attain the optical connection less in insertion loss. An indicator section 1d, 3a, 1e or 3b making it possible to observe an eccentric direction of a though-hole to which an exposed optical fiber end portion is inserted to be held is provided on the outer surface of a ferrule tubular body 1A, 1B, 1C, 1D and/or the outer surface of a flanged member 3A, 3B, 3C, 3D securely fixed to the rear end of the ferrule tubular body 1A, 1B, 1C, 1D.

Abstract: A compact multifunctional optical communication device and its control method is provided which having good responsibility. An optical communication device has an input section and an output section for propagating a light beam through a space; plural optical parts movable to an interrupting position of the light beam between the input section and the output section, and arranged in a series direction with the light beam; driving means for separately driving these optical parts; and driving control means for controlling an operation of this driving means.

Abstract: A highly reliable optical communications equipment is offered, which can control light more accurately than heretofore (i.e., less restrictions are imposed on the amount of attenuation and on the resolution) and which is equipped with a latching function. The optical communications equipment includes a piezoelectric actuator, a moving body moved by the piezoelectric actuator as a drive source, a multi-coating filter for controlling light that is a signal medium by movement of the moving body, a drive circuit for controlling the position of the multi-coating filter via the actuator, and a control circuit. The piezoelectric actuator uses bending vibrations produced in a piezoelectric vibrating body as a power source. If the moving body is not moved for a given time, the control circuit sends a function keeping signal to drive the actuator to such an extent that the moving body does not move. Thus, the function of the actuator is maintained.