Abstract: A circuit includes an input capacitor that stores charge based on a current received from a photodetector during a bias phase of the photodetector. The stored charge on the input capacitor is sampled during the sampling phase to determine an amount of light captured by the photodetector. A bias controller supplies a pulsed-bias voltage to the photodetector to generate the current from the photodetector. The bias controller controls the current to a current level below a predetermined current threshold via the pulsed-bias voltage before biasing of the detector and subsequent sampling of the stored charge on the input capacitor is initiated to mitigate 1/F noise in the photodetector.

Abstract: A circuit includes an input capacitor that stores charge based on a current received from a photodetector during a bias phase of the photodetector. The stored charge on the input capacitor is sampled during the sampling phase to determine an amount of light captured by the photodetector. A bias controller supplies a pulsed-bias voltage to the photodetector to generate the current from the photodetector. The bias controller controls the current to a current level below a predetermined current threshold via the pulsed-bias voltage before biasing of the detector and subsequent sampling of the stored charge on the input capacitor is initiated to mitigate 1/F noise in the photodetector.

Abstract: A circuit includes an input capacitor that stores charge based on a current received from a photodetector during a bias phase of the photodetector. The stored charge on the input capacitor is sampled during the sampling phase to determine an amount of light captured by the photodetector. A bias controller supplies a pulsed-bias voltage to the photodetector to generate the current from the photodetector. The bias controller controls the current to a current level below a predetermined current threshold via the pulsed-bias voltage before biasing of the detector and subsequent sampling of the stored charge on the input capacitor is initiated to mitigate 1/F noise in the photodetector.

Abstract: A circuit includes an input capacitor that stores charge based on a current received from a photodetector during a bias phase of the photodetector. The stored charge on the input capacitor is sampled during the sampling phase to determine an amount of light captured by the photodetector. A bias controller supplies a pulsed-bias voltage to the photodetector to generate the current from the photodetector. The bias controller controls the current to a current level below a predetermined current threshold via the pulsed-bias voltage before biasing of the detector and subsequent sampling of the stored charge on the input capacitor is initiated to mitigate 1/F noise in the photodetector.

Abstract: A photoconductive bolometer infrared detector using a detector material that has a resistance changed due to photo-excitation and thermal-excitation from an incident radiation in the infrared range. The resistance changes caused by photo-excitation and the thermal excitation are additive for this detector material. The detector material is suspended over a substrate by a gap of one quarter wavelength of the incident radiation, such that the thermal absorption of the incident radiation can be enhanced. Preferably, the detector material is lead selenide that has a thermal coefficient of resistance as high as 3.45%° C.?1, which is about 60% higher than that of vanadium oxide that has been widely used as the detector material in the conventional microbolometers. This detector structure allows dual band uncooled or moderately cooled operation.

Abstract: An imaging device is provided which may include a plurality of imaging lenses. Each imaging lens may be placed adjacent to a dispersive element. The imaging lenses and dispersive element(s) may be placed adjacent to a focal plane array to allow light from a light emitting event traveling through the imaging lenses to be simultaneously received by the focal plane array. One of the optical channels provides continuous broadband imagery without interfering with the operation of the dispersive optical channels. No moving parts are required in this small compact system, and no reconfiguration during operation is necessary to enable any of the functions, they are all simultaneous. Information related to the light received by the focal plane array may be transmitted to a processor for processing to determine whether the light emitting event is of interest and to determine an event type. Broadband imagery provided may be used for situational awareness, targeting, and surveillance.

Abstract: Apparatus which directs light rays from a distant target area scene to a plurality of wavelength detection systems without wavelength degradation. A reflective afocal telescope directs the light rays from the scene to a MEMS mirror array which redirects the rays to selected ones of the detection systems. The MEMS mirror array has individually controllable mirror elements which are driven to predetermined angular orientations to accomplish the light ray redirection. Outputs from the detection systems may be provide to a computer for analysis and/or viewing.

Abstract: An automated test system and method for infrared focal plane detector arr which utilize X-Y positioning of a focused laser spot scanning individual detector array elements Detector element outputs are processed for the entire focal plane array resulting in crosstalk measurement.