Raytheon Company

Mission Research Corporation

Matthew C Thomas

Ryan P Boesch

Jehyuk Rhee

Jeffrey Mitchell

Henry Lee

John J Drab

Jamal I Mustafa

Roy W Hendrick, Jr

Theodore Mark Kellum

Craig R Adams

A LADOR circuit is in signal communication with a pixel array. The LADOR circuit is configured to generate an integrator reset voltage based on a resistance of the at least one heated bolometer pixel, and to detect laser energy incident on the at least one heated bolometer pixel based on a comparison between the integrator reset voltage and an input threshold voltage (Vthreshold).

Bolometer readout integrated circuit (ROIC) with energy detection

A trigger sense circuit includes a pseudo-differential comparator circuit in signal communication with a pixel array. The pseudo-differential comparator circuit includes a first input in signal communication with a reference pixel group included in the pixel array to receive a pixel reference voltage, and a second input in signal communication with a target pixel group included in the pixel array to receive a pixel target voltage. The pseudo-differential comparator circuit is configured to selectively operate in a calibration mode to remove false trigger events and a comparison mode to detect at least one overheated pixel included in the target pixel group.

Bolometer pixel-based thermally actuated trigger ROIC with self-heating compensation and calibration (barrier-SHC)

A communication system includes an antenna assembly. The antenna assembly includes an optical communication layer including a plurality of electro-optical (EO) antennas for communicating via an EO signal and a radio-frequency communication layer including a plurality of radio frequency (RF) antennas for communicating via an RF signal. A processor operates the antenna assembly to communicate via one or both of the EO signal and the RF signal.

Three-dimensional wafer-stacked optical and radio frequency phased array transceiver system

A cryogenic laser transmitter includes a multi-fiber push-on (MPO) fiber adapter. The MPO fiber adapter includes an adapter housing and a laser mount. The adapter housing contains a plurality of laser diodes, each laser diode configured to generate a laser emission based on an input signal of a focal plane array. The laser mount is configured to mate with an MPO connector and direct each laser emission through to a corresponding fiber core of the MPO connector.

Multi-fiber push-on adapter for a cryogenic laser transmitter

A bolometer pixel trigger including a substrate, a bolometer formed on the substrate, and a thermal-sensitive film trigger. The thermal-sensitive film trigger includes a resistive varying thermal-sensitive material configured to change resistance in response to a change in temperature thereof. The thermal-sensitive film trigger is configured such that current flow therethrough varies in response to changes in the resistance of the resistive varying thermal-sensitive material.

Bolometer pixel including thermal-sensitive film trigger

A bolometer pixel trigger array includes a substrate, an electrically conductive contact pad formed on the substrate, and bolometer formed on the substrate. The bolometer includes at least one thermally conductive trigger arm having a fixed end coupled to a portion of the bolometer and an electrically conductive free end configured to deflect with respect to the fixed end. At least one trigger arm establishes different operating states of the bolometer pixel trigger in response to the at least one trigger arm realizing different temperatures. The different operating states are configured to change an electrical connection between the at least one trigger arm and the contact pad.

Bolometer pixel trigger

A thermal imaging system includes a pixel array having a plurality of pixel groups. Each pixel group including a plurality of pixel rows and a trigger sense circuit including a pixel group input line in signal communication with the plurality of bolometer pixels pixel row containing a plurality of bolometer pixels. The pixel group further includes a selector switch that selectively establishes an electrical connection between the pixel group and the trigger sense circuit. The selector switch operates in a first state to disconnect the pixel group from the pixel group input line while connecting the pixel group to the integration unit such that the integration unit generates the image, and a second state to disconnect the pixel group from the integration unit while connecting the pixel group to the pixel group input line such that the trigger sense circuit monitors the pixel group for a high temperature bolometer.

Bolometer pixel readout integrated circuit including trigger sense circuit

An apparatus and method for producing a spectrally variable radiation source and systems including same is disclosed. An embodiment of a spectrally variable radiation source is disclosed including a broadband radiation source, a collimating element, a dispersive element, an imaging element, an output aperture and an optional output collimating element. An embodiment of a spectrally encoded infrared chromatograph incorporating the inventive spatially variable radiation source is disclosed. An arbitrary spectrum projector for simulating emission or absorption spectra for chemical and biological agents, as well as projecting calibration and test spectra for characterizing sensors is also disclosed.

Apparatus and method for producing a spectrally variable radiation source and systems including same

A variable acousto-optic spectrum projector is disclosed. The invention may include a radiation source, an entrance slit, a lens or mirror, a Bragg cell, an arbitrary function generator for driving a transducer of the Bragg cell, another lens or mirror, an exit slit, and a collimating lens. In a first embodiment of the invention, the Bragg cell comprises a Tl,AsSe,crystal and emits light in the 7 to 11 &mgr;m range (long-wave infrared) with a spectral resolution of between 4.5 and 7 cm,. In a second embodiment of the invention, the Bragg cell comprises a TeO,crystal and emits light in the 420 to 720 nm range (visible) with a spectral resolution of between 50 and 80 cm,.

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Carpinteria, CA, United States of America

Matthew C Thomas