Spatial Light Modulator Holography

Holoeye offers a wide range of spatial light modulators for amplitude and phase modulation.

Spatial light modulator holography.

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. 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. 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.

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. The slm is used to encode output patterns for aerial mapping. 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. 2008 optical society of america full article pdf article.

Such a device has relevant applications in holographic displayor projection systems and for optical micromanipulation in laser tweezers. 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. A simple example is an overhead projector transparency.

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. In the 1980s large slms were placed on overhead projectors to project computer monitor contents to the screen. A spatial light modulator slm is an object that imposes some form of spatially varying modulation on a beam of light.