Abstract:
An interferometric modulator uses a beamsplitter to produce deflected and transmitted light beams onto mirrored surfaces of a piezoelectric crystal pair, one piezoelectric crystal being driven by a modulating voltage signal, whereupon the light beams are reflected back to the beamsplitter to produce a modulated optical output signal, with the modulator being especially adaptable for use as an digital photonic clock, as a pulse width/amplitude modulator, and as a bistable optical memory cell.
Abstract:
A light valve projection system is disclosed in which information is impressed on a light modulating fluid (32) overlying a disk (22) wherein incident light from a lamp (10) is modulated by the information and projected onto a viewing surface (33). The fluid layer includes a raster area within which information is written by the deposition of electric charge along scanning lines so as to form diffraction gratings which are parallel to the plane of the disk. An improvement in the operation of the system is achieved by interposing a sharp-cutoff filter between the light source and the light modulating fluid. In a preferred embodiment, the sharp-cutoff filter is part of the dichroic filter plate (26). The use of the sharp-cutoff filter allows the operation of the light valve at high brightness levels while reducing attendant degradation effects of the light modulating fluid and improving the ability to control the desired writing parameters of the light valve.
Abstract:
An interferometric modulator uses a beamsplitter to produce deflected and transmitted light beams onto mirrored surfaces of a piezoelectric crystal pair, one piezoelectric crystal being driven by a modulating voltage signal, whereupon the light beams are reflected back to the beamsplitter to produce a modulated optical output signal, with the modulator being especially adaptable for use as a digital photonic clock, as a pulse width/amplitude modulator, and as a bistable optical memory cell. A self-switching optical digital clock generates a digital signal without piezoelectric crystals by using analog optical feedback signals of precise time durations. Interferometric modulation is also used to amplify a sinusoidal electromagnetic signal, to regulate signal amplification, and to create logic functions.
Abstract:
A captive fastener generally comprising a receptacle, a bayonet assembly, and a locking assembly for locking the bayonet assembly to the receptacle. The receptacle extends along a longitudinal axis and includes a pair of parallel extending spiral raceways formed in the inner surface of a central opening that extends therethrough, and a keyway formed adjacent its terminus. The bayonet assembly includes a pair of bayonets that are adapted to ride in the raceways and a key positioned at the end of a plunger and is adapted to engage the keyway thereby locking the bayonet assembly in the receptacle. The locking assembly includes the plunger that when manipulated by a tool either engages or disengages the key from the keyway.
Abstract:
A locking mechanism inhibits rotational movement of a nut of a first cable connector that is threadingly engaged with a mating second cable connector. The nut has at least one recess in its outer surface along an edge and is rotatably mounted on a fixed housing of the first cable connector. The mechanism includes a component adapted to removably surround at least a portion of the housing and includes at least one first element matingly engageable with a corresponding second element positioned on the housing. A projection is rigidly mounted on the component. The projection is adapted to engage the at least one recess of the nut when the component is engaged with the outer surface of the housing.
Abstract:
A lift actuator for supporting a radar antenna array and for selectively moving the antenna array between a retracted position and an erected operational position, said actuator includes a first linear induction driver movable along a first member and a second linear induction driver movable along a second member. The first and second members each have a distal and a proximal ends. The second member is pivotably connected at said proximal end to the first driver. A third rigid member is connected to the second driver. The third member has a distal end adapted to pivotably connect to a radar antenna array. The radar antenna array is constrained in the direction of the first member.
Abstract:
A method for inhibiting rotational movement of a nut of a first cable connector that is threadingly engaged with a mating second cable connector wherein the nut has at least one recess in its outer surface, and is rotatably mounted on a fixed housing of the first cable connector, includes a step of removably securing a component to at least a portion of the housing. The component includes at least one first element matingly engageable with at least one corresponding second element positioned on the housing. The method further includes a step of matingly engaging the component with the at least one recess on the nut via a projection rigidly mounted on the component, thereby securing the nut to the component and the housing.
Abstract:
A heading sensor includes a housing containing an interferometer having a mirror movable in response to fluctuations in a gravitational force applied to the housing. The interferometer, responsive to a light beam, generates an optical signal modulated according to the relative displacement of the mirror. The housing further includes an electromagnetic coil positioned along an axis of the housing for generating a current signal indicative of fluctuations in a magnetic field applied to the housing. The heading sensor also includes a processor for determining a local gravitational field component according to the optical signal and a local magnetic field component according to the current signal.
Abstract:
A programmable optical logic gate for performing a selected function from the group including ALWAYS, NEVER, and logical OR, AND, NAND, NOR, XNOR, and XOR includes an optical logic circuit for receiving a first optical operand signal and a second optical operand signal and for performing a logic function on the first and second operand signals to produce an output signal, and further includes an optical logic function selection circuit coupled to the logic circuit for receiving logic function control signals and for selecting a logic function performed by the logic circuit on the first and second optical operand signals.
Abstract:
A fastener comprises a body having a first portion and a second portion. At least one moveable flange is arranged on the first portion of the body, and is moveable between a first unlocked position, and a second locked position. A second flange is arranged on the second portion of the body. The first and second body portions are adjustably connected such that the distance between the at least one moveable flange and the second flange along the longitudinal axis of the body is adjustable.