Spatial Light Modulator Hologram

Holoeye s spatial light modulator systems are based on translucent lcd or reflective lcos liquid crystal microdisplays.

Spatial light modulator hologram.

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 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. In dynamic computer generated holography that utilizes spatial light modulators both hologram synthesis and hologram representation are essential in terms of fast computation and high reconstruction quality. 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.

A simple example is an overhead projector transparency usually when the phrase slm is used it means that the transparency can be controlled by a computer in the 1980s large slms were placed on overhead projectors to project computer monitor contents to the screen. Each spatial light modulator includes a built in slm panel with independent horizontal and vertical tilt adjustment of 3 2. The increased image height and horizontal scanning. A spatial light modulator slm is an object that imposes some form of spatially varying modulation on a beam of light.

These spatial light modulators provide far more pixels than lower order phase modulators such as segmented or deformable mirrors. The reduction in horizontal pixel pitch of the slm provides a wide viewing zone angle. Parallel femtosecond laser processing with a computer generated hologram displayed on a spatial light modulator slm is demonstrated. The pluto 2 1 phase only spatial light modulator slm consists of a driver unit with standard digital video interface hdmi and a phase only lcos liquid crystal on silicon microdisplay with full hd resolution 1920 x 1080 pixel and 8 µm pixel pitch leading to an active area diagonal of 0 7 with aspect ratio of 16 9.

The hologram uses multiplexed phase fresnel lenses mpfls with features of independent tunability three dimensional 3d parallelism of the diffraction peaks. 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. Use of the slm enables performance of an arbitrary and variable patterning in laser processing. For hologram synthesis i e.

Such a device has relevant applications in holographic displayor projection systems and for optical micromanipulation in laser tweezers. In order to increase the image size and the viewing zone angle of a hologram a high speed spatial light modulator slm is imaged as a vertically long image by an anamorphic imaging system and this image is scanned horizontally by a galvano scanner. For maximum phase shift values refer to the table to the upper right.