Coherent wavefront resolution

High-resolution Wavefront Control Using Micromirror Arrays

Silicon deformable mirrors have the potential to modulate spatial and temporal features of an optical wavefront. This capability is critical for systems in which aberrations affect optical beam quality, including many applications in laser communication, medical imaging, astronomy, and target tracking. The main goal of the work presented here was to design, build, and test a 1024 actuator wavef...

Ultra-high resolution coded wavefront sensor.

Wavefront sensors and more general phase retrieval methods have recently attracted a lot of attention in a host of application domains, ranging from astronomy to scientific imaging and microscopy. In this paper, we introduce a new class of sensor, the Coded Wavefront Sensor, which provides high spatio-temporal resolution using a simple masked sensor under white light illumination. Specifically,...

Coherent control of plasma dynamics by feedback-optimized wavefront manipulationa)

Coherent model-based optical resolution

Earlier results on parametric model-based optical resolution by the first author [J. Opt. Soc. Am. A 4, 1402 (1987)] concerned two incoherent sources of known intensity. These results are generalized to sources with any degree of coherence and unknown intensity. A further generalization is that the model underlying the observations and that chosen by the experimenter need not be the same. It is...

Continuous Curvelet Transform: I. Resolution of the Wavefront Set

We discuss a Continuous Curvelet Transform (CCT), a transform f → Γf (a, b, θ) of functions f(x1, x2) on R , into a transform domain with continuous scale a > 0, location b ∈ R, and orientation θ ∈ [0, 2π). The transform is defined by Γf (a, b, θ) = 〈f, γabθ〉 where the inner products project f onto analyzing elements called curvelets γabθ which are smooth and of rapid decay away from an a by √ ...