The reference mirror is set static and different wavefronts are excited by means of the modulator.
Spatial light modulator phase.
A spatial light modulator slm is an object that imposes some form of spatially varying modulation on a beam of light.
Spatial light modulators slms have widespread applications ranging from 3d video projection 1 and additive manufacturing 2 to quantum 3 and adaptive optics.
A four square mask shown in figure 3a is sent to the lcos.
For maximum phase shift values refer to the table to the upper right.
Spatial light modulators slms which are devices used to manipulate the phase of an incident wave front are prolific in fields such as optical trapping dynamic diffractive optical elements and display technology.
The squares are set 44 levels of grey.
The reference mirror is unblocked and the polarizers are removed.
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These spatial light modulators provide far more pixels than lower order phase modulators such as segmented or deformable mirrors.
Of the many challenges inherent to using slms one of the most ubiquitous is the calibration of the device s phase shifting mechanism.
Spatial light modulators allow using a special type of phase shifting method.
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.
Meadowlark optics designs develops and manufactures an extensive range of high quality polarization systems and components including liquid crystal devices.
Hex spatial light modulator our transmissive hexagonal array slms are designed for adaptive optics applications the two dimensional array of liquid crystal variable retarders acts as a real time programmable phase mask for wavefront correction of a linear polarized source.
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.
4 the most versatile type of slms are phase only slms which are capable of reconfiguring the phase retardation.
Holoeye s spatial light modulator systems are based on translucent lcd or reflective lcos liquid crystal microdisplays.
