Nippon Kayaku Kabushiki Kaisha

Mitsubishi Gas Chemical Company, Inc.

Mgc Filsheet Co., Ltd.

Yoshiyuki Yahagi

Kouichi Tanaka

Tomoyuki Hayasaki

Saki Abe

Yuki Aikawa

Hitoshi Asami

Katsuyuki Murai

Chihiro Takahashi

Kyousuke Nakamura

Hideyoshi Fujisawa

Takuya Gotou

Kazuhisa Mitsuhata

Disclosed is an optical film including an optical laminate having two or more laminated light reflection layers of different center wavelengths of reflection and a polarizing element layer. Reflection layers are selected from at least one light reflection layer of both RPRL and LPRL, each having a center wavelength of selective reflection at or within 400 nm and 900 nm, RPRL having a fixed cholesteric liquid crystal phase with a right-handed spiral structure having right-handed circularly polarized light reflectivity, and LPRL having a fixed cholesteric liquid crystal phase with a left-handed spiral structure having left-handed circularly polarized light reflectivity. Layers RPRL and LPRL have center wavelengths of selective reflection shifted from that of a light reflection layer adjacent to each other by an interval of 40 nm or more and 500 nm or less, and the maximum reflectance of optical laminate is 50% or less.

Optical film and eyewear

The present disclosure provides an optical film for eyewear that allows, when used by a person feeling stressed, easy of production of a space having a color tone that the person psychologically feels healing, and a functional film for eyewear, an optical laminate, and eyewear that each include the optical film. The optical film for eyewear including an optical functional layer, and has that transmitted light from a light source of white light has a pale tone, is provided.

Optical film for eyewear, and functional film for eyewear, optical laminate for eyewear, and eyewear which have same

An optical film for eyewear includes a light control layer and at least one light reflection layer laminated in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the light control layer is a quarter wave plate.

Optical film for eyewear, and optical laminate and eyewear using the optical film

An optical film for eyewear includes a first light control layer, at least one light reflection layer, a second light control layer, and a linear polarization element layer in this order from an outer side with respect to a viewer. The light reflection layer includes a cholesteric liquid crystal layer that reflects left-handed circularly polarized light or right-handed circularly polarized light in a visible light range, and the first light control layer and the second light control layer are each a quarter wave plate.

Optical film for eyewear with light control, light reflection, and polarization layers

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;.

Optical laminate structure and head-up display system using the optical laminate structure, and light reflection film

[Problem] The present invention provides eyewear, such as polarized sunglasses, having cholesteric liquid crystal layers, wherein the eyewear has a metallic tone and antiglare properties, minimizes the reduction in light-polarizing element absorptive capability that is associated with circular polarization, and is moreover unaffected by external degrading factors such as sebum, moisture, and salt air. [Solution] This optical film is characterized by being provided with a light-reflecting layer R comprising a cholesteric liquid crystal layer that has right-handed helical orientation, a light-reflecting layer L comprising a cholesteric liquid crystal layer that has left-handed helical orientation, and a polarizing element layer.

Growing community of inventors

Tokyo, Japan

Yoshiyuki Yahagi