United States of America As Represented by the Secretary of the Air Force

Lawrence Livermore National Security, LLC

Other

Harris J Hall

LaVern A Starman

Robert Matthew Panas

Phillip Harris Paul

Michael E McConney

John P K Walton

David Torres Reyes

A tunable optical filter for a detector is presented including a plate having a top side and a bottom side. The plate has material properties making it transparent to a range of optical frequencies. A transparent metasurface is proximate the top side of the plate. The transparent metasurface is configured to have a transmissive pass band and a stop band. An undercarriage support structure is proximate the bottom side of the plate. The undercarriage support is responsive to photothermal heating. The undercarriage support is configured to deform from the photothermal heating caused by an undesired signal thereby shifting the stop band in frequency toward the undesired signal to block reception of the undesired signal by the detector.

Photothermally actuated self-tuning optical light valve

The present disclosure relates to an adaptive, free-space optical system. The system may have a controller and a digital micromirror (DMM) array responsive to the controller. The digital micromirror may include a plurality of independently controllable micromirror elements forming a receiver for receiving optical signals from an environmental scene. At least two of the plurality of independently controllable micromirror elements are steerable in different directions to receive optical signals emanating from two or more locations within the environmental scene. A beam steering subsystem forms a portion of the micromirror array and is in communication with the controller for receiving control signals from the controller. A detector is used to receive an incoming free space optical signal imaged by at least one of the micromirror elements.

System and method for adaptive optical tracking with selectable tracking modes

An actuator element of a MEMS device is provided, which is fabricated using surface micromachining on a substrate. An insulating layer having a first portion contacts the substrate while a second portion is separated from the substrate by a gap. A metallic layer contacts the insulating layer having a first portion contacting the first portion of the insulating layer and a second portion contacting the second portion of the insulating layer. The second portion of the metallic layer is prestressed. Alternately, the actuator element includes a first insulating layer separated from the substrate by a gap. A metallic layer has a first portion contacting the substrate and a second portion contacting the insulating layer. A second insulating layer contacts a portion of the second portion of the metallic layer opposite the first insulating layer, where the second insulating layer is prestressed.

MEMS device for large angle beamsteering

The present disclosure relates to an imaging system which may make use of an electronic controller, a digital micromirror array, an aperture control system and a detector to image a desired scene. The digital micromirror array has a plurality of micromirror elements responsive to control signals generated by the electronic controller for electronically aiming the micromirror elements in a desired direction to image the desired area, and for receiving and reflecting light emanating from the desired area. The aperture control system receives light reflected from the digital micromirror array and passes a predetermined subportion of the received light therethrough. The detector is responsive to the predetermined subportion of light.

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Yellow Springs, OH, United States of America

Harris J Hall