Method for producing a beam shaping holographic optical element

US9541900B2 · kind B2 · utility

Assignees

• LG Display Co., Ltd. · KR
• Bayer MaterialScience AG · DE

Inventors

• Hyungseok Bang · Goyang-si, KR
• Heejin Im · Paju-si, KR
• Guensik Lee · Seoul, KR
• Friedrich-Karl Bruder · Krefeld, DE
• Thomas Fäcke · Leverkusen, DE
• Marc-Stephan Weiser · Leverkusen, DE
• Rainer Hagen · Leverkusen, DE
• Thomas Rölle · Leverkusen, DE
• Horst Berneth · Leverkusen, DE
• Dennis Hönel · Wichterich, DE
• Günther Walze

Key dates

• Filing date: Dec 26, 2013
• Grant date: Jan 10, 2017
• Expiry date: Dec 26, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G03H2222/18
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

The present disclosure relates to a method for producing a beam shaping holographic optical element, which is configured to generate diffracted beams configured to reconstruct an image of a diffusor irrespectively of the point of impact of a pencil of light on the beam shaping holographic optical element, comprising providing a recording element, providing a master element comprising a particular pattern, forming a recording stack comprising the recording element and the master element such that the master element is arranged to the recording element in a closed-copy distance, irradiating at least a part of the recording stack with a reconstruction beam, irradiating at least a part of the recording stack with a reference beam, wherein at least one of the reconstruction beam or reference beam penetrates the master element to record the pattern of the master element onto the recording element.