VARIABLE LIGHT SHAPING OPTIC USING LIQUID CRYSTALS AND SURFACE RELIEF MICRO-STRUCTURE DIFFUSER

In a liquid crystal type variable beam shaping optic, a part of a structure that forms a gap for the liquid crystals includes a surface relief micro-structure diffuser. Due to the micro-features of the diffuser, the gap is non-uniform. A voltage applied to an electrode associated with the diffuser a...

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Bibliographische Detailangaben
Hauptverfasser:	Komanduri, Ravi Kumar, Mao, An, Schultz, Alexander Jacob
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	In a liquid crystal type variable beam shaping optic, a part of a structure that forms a gap for the liquid crystals includes a surface relief micro-structure diffuser. Due to the micro-features of the diffuser, the gap is non-uniform. A voltage applied to an electrode associated with the diffuser and an electrode associated with an opposing substrate controls the orientation of uniaxial nematic liquid crystals in a material filling the non-uniform gap. For example, the index of refraction of the material may vary relative to an index of refraction of the diffuser, based on variations of the crystal orientation caused by variation of the applied voltage. The change in relative indices of refraction, in the examples, changes a focal length of the variable optic and thus the shape of a light beam optically processed through the liquid crystal optic.