| 摘要 |
A method of producing a circular polarization controlling optical element (10), comprising the steps of:
applying a cholesteric liquid crystal solution (13) to a first substrate (12) so as to form an uncured liquid crystal layer (18), the cholesteric liquid crystal solution (13) having a photopolymerization initiator, and
applying ultraviolet light to the uncured liquid crystal layer (18) formed on the first substrate (12) so as to cure the uncured liquid crystal layer (18), with an exposed surface of the uncured liquid crystal layer (18), placed opposite to a substrate-side surface facing the first substrate (12), being exposed to a gaseous atmosphere whose oxygen concentration at a normal pressure is 10 volume% or more,
wherein an intensity of the ultraviolet light to be applied is from about 10% to about 1% of that of ultraviolet light required to cure, in the gaseous atmosphere, the liquid crystalline molecules contained in the liquid crystal layer while keeping the helical pitch uniform.
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