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We present a method that significantly reduces the speckle effect in holographic projection. It is based on zero-padding the predefined projected intensity and calculating an extended phase distribution using an optimized iterative approach based on the generalized projection method. The extended phase distribution is divided into several finite ones with the size of the spatial light modulator (SLM)...
We present an opto-electronic sub-pixel shifting method for resolution enhancement in monochromatic imaging. It is based on a Spatial Light Modulator (SLM) in the Fourier domain of a 4f-configuration. The SLM is used to modulate the incident light with the transfer function of a lateral subpixel shift. Therefore, a set of laterally shifted representations of the wave field incident on the 4f-setup...
We show that phase retrieval from a set of intensity measurements can be used to determine the thermally induced deformation of a diffusely reflecting surface. The presented approach is based on an experimental setup with a spatial light modulator (SLM) located in the Fourier domain of a 4f-configuration. The SLM is used to modulate the incident light with the transfer function of propagation. Since...
We provide an overview over recent applications of electronically addressed liquid crystal spatial light modulators (SLM) in the field of optical metrology. Three particular examples are considered: A shear interferometer, a setup for phase retrieval from a set of intensity measurements and a digital holographic sensor which allows for the electronic adaption of the reference wave.
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