document: Restoration of broadband imagery steered with a liquid-crystal optical phased array In many imaging applications , it is highly desirable to replace mechanical beam-steering components -LRB- i.e. , mirrors and gimbals -RRB- with a nonmechanical device . One such device is a nematic liquid crystal optical phased array -LRB- LCOPA -RRB- . An LCOPA can implement a blazed phase grating to steer the incident light . However , when a phase grating is used in a broadband imaging system , two adverse effects can occur . First , dispersion will cause different incident wavelengths arriving at the same angle to be steered to different output angles , causing chromatic aberrations in the image plane . Second , the device will steer energy not only to the first diffraction order , but to others as well . This multiple-order effect results in multiple copies of the scene appearing in the image plane . We describe a digital image restoration technique designed to overcome these degradations . The proposed postprocessing technique is based on a Wiener deconvolution filter . The technique , however , is applicable only to scenes containing objects with approximately constant reflectivities over the spectral region of interest . Experimental results are presented to demonstrate the effectiveness of this technique
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