Pancharatnam-berry phase optical element and manufacturing method of the same

Abstract

To provide a Pancharatnam-Berry phase optical element suppressing occurrence of disclination and excellent in optical characteristics, and a manufacturing method of Pancharatnam-Berry phase optical element suitable for manufacturing the Pancharatnam-Berry phase optical element.SOLUTION: A Pancharatnam-Berry phase optical element comprises an optical alignment film and a liquid crystal layer in contact with the optical alignment film. The liquid crystal layer includes a plurality of alignment domains having reference alignment directions of liquid crystal defined by the optical alignment film, the directions differing to each other. The plurality of alignment domains includes a plurality of first alignment domains and a plurality of second alignment domains. Each of the plurality of second alignment domains is in contact with each of two first alignment domains of the plurality of first alignment domains and is located between the two first alignment domains. The plurality of first alignment domains does not form a reference alignment direction difference of 90°.SELECTED DRAWING: Figure 20

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