LCOS Spatial Light Modulator working principle

In this video we explain the basic principle of an LCOS phase only Spatial Light Modulator. The desired optical functionality of a phase modulator is enabled by the electrical and optical anisotropy of the Liquid crytal material.
Electrical anisotropy, or in other works the dipole character of the LC, enables a variable orientation of the LC molecules in the direction of an applied electric field, (depending on its strength). Optical anisotropy or in other words birefringence, means that LC molecules have different refractive indexes: no (ordinary refractive index) and ne (extraordinary refractive index) for perpendicular molecule axes.

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