Spatial Light Modulator Holography

Once you know what the scattered wave front of the object looks like or how it can be computed it must be sent to a spatial light modulator slm. Usually when the phrase slm is used it means that the transparency can be controlled by a computer. Control of laser beam irradiance profile particularly providing uniform distribution is of great importance for various holography applications based on spatial light modulators slm like liquid crystal on silicon or deformable mirror ones.

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In the 1980s large slms were placed on overhead projectors to project computer monitor contents to the screen.

Spatial light modulator holography.

Such a device has relevant applications in holographic displayor projection systems and for optical micromanipulation in laser tweezers. 2008 optical society of america full article pdf article. The light path is folded such that the two corresponding phase masks can be displayed side by side at a single phase only spatial light modulator. Spatial light modulators holoeye s spatial light modulator slm systems are based on translucent or reflective liquid crystal microdisplays.

A super resolution imaging method using dynamic grating based on liquid crystal spatial light modulator slm is developed to improve the resolution of a digital holographic system. This phase control is highly stable with minimal fluctuations and minimal crosstalk with adjacent pixels. Slm is a device that modulates the coherent light spatially based on its control input. Holoeye offers a wide range of spatial light modulators for amplitude and phase modulation.

A simple example is an overhead projector transparency. The slm is used to encode output patterns for aerial mapping. A spatial light modulator slm is an object that imposes some form of spatially varying modulation on a beam of light. Spatial light modulators spatial light modulator slm is a general term describing devices that are used to modulate amplitude phase or polarization of light waves in space and time.

The one dimensional amplitude cosine grating is loaded on the slm which is placed between the object and hologram plane in order to collect more high frequency components towards ccd plane. Thorlabs exulus spatial light modulators slms employ liquid crystal on silicon lcos technology to produce high resolution high speed reflective phase modulation with individually addressable pixels. Holoeye s spatial light modulator systems are based on translucent lcd or reflective lcos liquid crystal microdisplays.

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