Large-scale, high-contrast glare suppression with low-transmittance eigenchannels of aperture-target transmission matrices.

ABSTRACT

Glare suppression with wavefront shaping is a significant technique in terms of actively controlling the speckle light field. A novel glare suppression method based on transmission matrix (TM) measurement is demonstrated in this Letter. An aperture-target TM model is proposed, and its low-transmittance eigenchannel is utilized to minimize the speckle intensity inside a given target area. We verified the availability of this method by experimentally realizing high-contrast glare suppression in areas of various sizes and shapes. For a large-scale area containing 100 speckle grains, the average intensity was suppressed to 6.3% of the background intensity. We believe our method provides an ideal method for glare suppression, and it holds interesting prospects for areas such as speckle optical tweezers and imaging under scattering conditions.