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Time-multiplexed broadband and multi-filtered electro-optic sensor

  • US 9,488,444 B2
  • Filed: 04/29/2013
  • Issued: 11/08/2016
  • Est. Priority Date: 04/29/2013
  • Status: Active Grant
First Claim
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1. An electro-optic (EO) sensor, comprisingan objective optical system that forms an image within a field of view (FOV) from incident optical radiation;

  • a light modulator configured to alternately direct the incident optical radiation in the FOV to a primary optical channel and to a multi-filtered optical channel to time multiplex the FOV;

    said primary optical channel comprising a relay optic configured to relay the image of the FOV onto a detector configured to convert optical radiation into a first electrical signal;

    said multi-filtered optical channel comprising,a focusing optic configured to collimate the incident optical radiation in the FOV;

    a field directing having a plurality of tilt cells configured to spatially sample the optical radiation over the FOV, each tilt cell comprising first and second optical tilt elements that tilt the sampled optical radiation by different first and second tilt angles, respectively, to map the sampled FOV to first and second spatially separated optical sub-channels;

    first and second optical filters positioned in said first and second spatially separated optical sub-channels, respectively, to filter the optical radiation, said first and second optical filters having different measurement bands; and

    one or more detectors that convert the filtered incident optical radiation in the different measurement bands into a second electrical signal.

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