Nippon Kayaku Kabushiki Kaisha

Hitoshi Asami

Kouichi Tanaka

Yoshiyuki Yahagi

Tomoyuki Hayasaki

Chihiro Takahashi

A light reflection film includes at least one light reflection layer RPRL in which a cholesteric liquid crystal phase of a right-handed helical structure having right circularly polarized light reflection ability is fixed; and at least one light reflection layer LPRL in which a cholesteric liquid crystal phase of a left-handed helical structure having left circularly polarized light reflection ability is fixed. A total of three or more layers of the light reflection layer(s) RPRL and the light reflection layer(s) LPRL are laminated. The light reflection layer(s) RPRL and the light reflection layer(s) LPRL laminated each have a selective reflection center wavelength shifted by an interval of 10 nm or more and 160 nm or less between two light reflection layers adjacent to each other.

Light reflection film and laminate having the light reflection film

An optical laminate structure includes a light control laminate having at least one light reflection layer, a first quarter wave plate laminated on one of surfaces of the light reflection layer, and a second quarter wave plate laminated on another surface of the light reflection layer. The light reflection layer includes a right-handed circularly polarized light reflection layer or a left-handed circularly polarized light reflection layer, and an angle formed by a polarization axis of the S-polarized light or P-polarized light incident from a position inclined from an axis perpendicular to a surface of the light control laminate by 45&#xb0; or more and 65&#xb0; or less and a slow axis of the first quarter wave plate on a side to which the S-polarized light or P-polarized light is incident is 5&#xb0; or more and less than 45&#xb0;.

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Tokyo, Japan

Hitoshi Asami