A fiber optic connector plug includes a housing. The housing includes a central axis, opposing lateral sides and a top side extending between the opposing lateral sides, and an interior channel, extending through the housing, in a direction parallel to the central axis, from a first end portion of the housing to a second end portion of the housing. The housing also includes a latch, coupled to the housing at the top side. The housing further includes a ferrule, extending from the first end portion of the housing. The housing additionally includes a shutter, coupled to the first end portion of the housing such that the shutter is pivotable and translationally slidable, relative to the first end portion of the housing, between a closed position, in which the shutter covers the ferrule, and an open position, in which the shutter does not cover the ferrule.

A shutter assembly for a dual polarity fiber optic adapter is provided. The shutter assembly disposed in the dual polarity fiber optic adapter may eliminate dust accumulation and obstruct light beams emission, thus preventing eyes from a user from exposure to the light beams. Furthermore, an extending tab formed in the dual polarity fiber optic adapter may also prevent misplacement of fiber optic connector during installation.

A MEMS element includes a substrate, a fixing portion provided at the substrate, first and second actuators provided at the fixing portion, a drive target member coupled to the first and second actuators, a third actuator provided at the fixing portion, and a restriction member coupled to the third actuator. The first and second actuators drive the drive target member in a direction parallel to or crossing an upper surface of the substrate. The third actuator drives the restriction member in a direction crossing a movement direction of the drive target member to position the restriction member within a movement plane of the drive target member such that the restriction member restricts displacement of the drive target member.

A shutter assembly for a dual polarity fiber optic adapter is provided. The shutter assembly disposed in the dual polarity fiber optic adapter may eliminate dust accumulation and obstruct light beams emission, thus preventing eyes from a user from exposure to the light beams. Furthermore, an extending tab formed in the dual polarity fiber optic adapter may also prevent misplacement of fiber optic connector during installation.

An optical system includes a transparent display, which has a first side configured to be positioned in proximity to an eye of an observer and a second side opposite the first side, and which is configured to project an image into the eye. An image generator is configured to generate a sequence of images during respective display intervals, which are interleaved with blanking intervals, and to transmit the images to the transparent display for projection into the eye. A shutter is positioned on the second side of the display and having a first state in which the shutter blocks optical radiation and a second state in which the shutter transmits optical radiation. A controller drives the image generator and the shutter so that the shutter operates in the first state during the display intervals and in the second state during the blanking intervals.

This application provides example optical switching methods and example apparatuses. One example method includes generating K images that are consecutive in time sequence, where a first wavelength channel and at least one second wavelength channel are switched to a blocking state through a same image in the K images, and a value of K depends on a quantity of times that attenuation adjustment is performed for switching the first wavelength channel from a normal state to the blocking state. Information about the K images can then be sent to an optical switching element to enable the optical switching element to perform attenuation adjustment on the first wavelength channel and the at least one second wavelength channel.

A fiber optic connector plug includes a housing. The housing includes a central axis, opposing lateral sides and a top side extending between the opposing lateral sides, and an interior channel, extending through the housing, in a direction parallel to the central axis, from a first end portion of the housing to a second end portion of the housing. The housing also includes a latch, coupled to the housing at the top side. The housing further includes a ferrule, extending from the first end portion of the housing. The housing additionally includes a shutter, coupled to the first end portion of the housing such that the shutter is pivotable and translationally slidable, relative to the first end portion of the housing, between a closed position, in which the shutter covers the ferrule, and an open position, in which the shutter does not cover the ferrule.

Safety systems for operating equipment have a source of visible light, a first signal light transmitter, a first signal light receiver, preferably a second signal light transmitter and second signal light receiver. A fiber optic bundle with at least one section of illuminated cable emits the visible light and carries the signal light. The signal light follows an optical circuit through the fiber optic bundle from the signal light transmitters to the signal light receivers. The signal light receivers are connected to suitable controls of the system such that if a predetermined light signal is not received by the signal light receiver(s), the operating equipment will stop and/or alarms will be generated. The fiber optic bundle is connected to optical pull switches which interrupt the light circuit if a person applies a predetermined pull force to the optical fiber bundle.

An optical assembly includes a light source for providing a beam of light, a lens system configured to expand and collimate the beam of light, and a configurable beam injector, wherein the beam injector contains a first grid plate and a second grid plate to block individual beams of light. The first grid plate and the second grid plate may be configured such that each grid plate respectively corresponds to particular MEMS mirrors. The grid plates can be configured to have pathways that allow for beams of light to be passed through and other pathways which are blocked to prevent the passage of light. The first grid plate and second grid plate may thus block or allow for transmission of beams of lights to those particular MEMS mirrors. The second grid plate can be configured to be easily swappable during or removable to allow for a different set of beams of light, corresponding to a different set of MEMS mirrors, to be blocked. The second grid plate can be configured to be rotated or slid linearly within a housing.

A fiber-optic switching system is provided which includes an optical fiber switch having first and second optical fiber portions and an electrically-controlled actuator. The first and second optical fiber portions are spaced apart with a gap between the portions that is sized to allow for light signal coupling between the optical fiber portions in a signal-passing state of the switch. The electrically-controlled actuator is coupled to transition the switch between the signal-passing state, where the light signal is allowed to pass between the optical fiber portions, and a signal-non-passing state, where the light signal is prevented from passing between the optical fiber portions. The electrically-controlled actuator includes an electroactive material exhibiting a physical change with change in an applied electrical field, where the physical change facilitates transitioning the optical fiber switch between the signal-passing and the signal-non-passing states.