SLM-Aided Imaging

Programmable Microscopy

Applications of Spatial Light Modulators

Our spatial light modulators (SLMs) are high-resolution liquid crystal panels with micron-sized individually addressable pixels, which can be used to shape the wavefront of an optical beam. Grey-level values on the panel are converted into phase shifts.

We use SLMs for instance as programmable Fourier filters for generating contrast enhancement or as programmable diffractive optical elements for quantitative phase microscopy:

Some recent achievements are the demonstration of spiral phase contrast, giving rise to strong isotropic edge-enhancement in the images, SLM-based depth-of-field multiplexing or quantitative single-shot-DIC imaging and more (see Topics below).

 Presentation at the Exner Ceremony 2016

Programmable Microscopy



RESCH microscopy

SLM-aided multiplexing


Spiral phase contrast (SPC)

Speckle-aided holography

Dynamic Fourier-filtering


Speeding up SLMs with overdrive

Aberration correction and artifact reduction

Generation and tailoring of complex fields

We also use SLMs to shape and a steer optical traps (cf. optical tweezers) and to fine-tune the phase matching in wide-field CARS microscopy


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