A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN
PROBLEM TO BE SOLVED: To provide an optical body that offers improved directional reflection performance for light in a specific wavelength band.SOLUTION: An optical body includes a first optical transparent layer 4 having pyramidal recesses, a wavelength-selective reflection layer 3 formed on the recesses and designed to selectively reflect light in a specific wavelength band, and a second optical transparent layer 5 formed on the wavelength-selective reflection layer. The optical body satisfies R1≥R2×0.5. In the expression, R1 represents a reflectance for light in the specific wavelength band originating from incident light entering an incident surface at an incident angle (θ=60°, φ=0°) and traveling in a direction of a reflection angle (θ=0 to 90°, φ=-90 to 90°), and R2 represents a reflectance for the light in the specific wavelength band originating from the incident light and traveling in a direction of a reflection angle (θ=-90 to 90°, φ=-90 to 90°), where θ represents an angle between a line normal to the second optical transparent layer as an incident surface and an incident ray entering the incident surface or a reflected ray coming out from the incident surface, and φ represents an angle between a specific straight line within the incident surface and a component of the incident ray or reflected ray projected on the incident surface.SELECTED DRAWING: Figure 1A
【課題】特定波長帯域の光の指向反射性能を改善した光学体を提供する。【解決手段】光学体は、四角錐状の凹部を有する第１の光学透明層４と、凹部上に形成された特定波長帯の光を選択的に反射する波長選択反射層３と、波長選択反射層上に形成された第２の光学透明層５とを備える。光学体は、入射角（θ＝６０°、φ＝０°）（ただし、θ：入射面となる第２の光学透明層に対する垂線と、入射面に入射する入射光又は入射面から出射される反射光とのなす角、φ：入射面内の特定の直線と、入射光又は反射光を入射面に投影した成分とのなす角）で入射面に入射した入射光のうち、反射角（θ＝０°〜９０°、φ＝−９０°〜９０°）の方向への特定波長帯の光の反射率をＲ１、反射角（θ＝−９０°〜９０°、φ＝−９０°〜９０°）の方向への特定波長帯の光の反射率をＲ２とするとき、Ｒ１≧Ｒ２×０．５、を満たす。【選択図】図１Ａ
OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN
PROBLEM TO BE SOLVED: To provide an optical body that offers improved directional reflection performance for light in a specific wavelength band.SOLUTION: An optical body includes a first optical transparent layer 4 having pyramidal recesses, a wavelength-selective reflection layer 3 formed on the recesses and designed to selectively reflect light in a specific wavelength band, and a second optical transparent layer 5 formed on the wavelength-selective reflection layer. The optical body satisfies R1≥R2×0.5. In the expression, R1 represents a reflectance for light in the specific wavelength band originating from incident light entering an incident surface at an incident angle (θ=60°, φ=0°) and traveling in a direction of a reflection angle (θ=0 to 90°, φ=-90 to 90°), and R2 represents a reflectance for the light in the specific wavelength band originating from the incident light and traveling in a direction of a reflection angle (θ=-90 to 90°, φ=-90 to 90°), where θ represents an angle between a line normal to the second optical transparent layer as an incident surface and an incident ray entering the incident surface or a reflected ray coming out from the incident surface, and φ represents an angle between a specific straight line within the incident surface and a component of the incident ray or reflected ray projected on the incident surface.SELECTED DRAWING: Figure 1A
【課題】特定波長帯域の光の指向反射性能を改善した光学体を提供する。【解決手段】光学体は、四角錐状の凹部を有する第１の光学透明層４と、凹部上に形成された特定波長帯の光を選択的に反射する波長選択反射層３と、波長選択反射層上に形成された第２の光学透明層５とを備える。光学体は、入射角（θ＝６０°、φ＝０°）（ただし、θ：入射面となる第２の光学透明層に対する垂線と、入射面に入射する入射光又は入射面から出射される反射光とのなす角、φ：入射面内の特定の直線と、入射光又は反射光を入射面に投影した成分とのなす角）で入射面に入射した入射光のうち、反射角（θ＝０°〜９０°、φ＝−９０°〜９０°）の方向への特定波長帯の光の反射率をＲ１、反射角（θ＝−９０°〜９０°、φ＝−９０°〜９０°）の方向への特定波長帯の光の反射率をＲ２とするとき、Ｒ１≧Ｒ２×０．５、を満たす。【選択図】図１Ａ
OPTICAL BODY, WINDOW MATERIAL, AND ROLL CURTAIN
光学体、窓材及びロールカーテン
ARIMA MITSUO (author) / SHIBUYA ATSUSHI (author) / NAGAHAMA TSUTOMU (author)
2017-10-19
Patent
Electronic Resource
Japanese
IPC:
G02B
Optische Elemente, Systeme oder Geräte
,
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
/
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
,
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES