PROBLEM TO BE SOLVED: To provide a technology for suppressing changes in chromaticity while reducing damages in a display device by sun rays.SOLUTION: A head-up display device 1 includes an illumination optical system 22, an imaging optical system 10 and a reflective optical system 34. The illumination optical system 22 projects light source light representing information. The imaging optical system 10 projects the light source light projected by the illumination optical system 22 onto a projection plane. The reflective optical system 34 includes a dielectric multilayer film that transmits electromagnetic waves in an infrared region and reflects electromagnetic waves in a visible light region. The reflective optical system 34 is configured to give a retardation within a range of larger than -π/2 [rad] and smaller than π/2 [rad] at target wavelengths including at least a part of the wavelengths in the light source light from the illumination optical system 22. The reflective optical system 34 is disposed on a path of the light source light from the illumination optical system 22 to the imaging optical system 10 in such a manner that an angle α (degree) of a polarization axis of the light source light from the illumination optical system 22 with respect to an incidence plane satisfies 0<α<90 or 90<α<180.SELECTED DRAWING: Figure 1
【課題】太陽光による表示器のダメージを低減しつつ、色度の変化を抑制する技術の提供。【解決手段】ヘッドアップディスプレイ装置1は、照明光学系22と、結像光学系10と、反射光学系34とを備える。照明光学系22は、情報を表す光源光を投射する。結像光学系10は、照明光学系22により投射された光源光が投影面に投影される。反射光学系34は、赤外線領域の電磁波を透過し可視光領域の電磁波を反射する誘電体多層膜を有す。反射光学系34は、照明光学系22からの光源光における少なくとも一部の波長を含む対象波長の位相差が、−π/2[rad]より大きくπ/2[rad]より小さい範囲となるように構成される。反射光学系34は、照明光学系22から結像光学系10までの光源光の経路上に、照明光学系22からの光源光の偏光軸αが入射面に対して0度<α<90度<α<180度となるように配置される。【選択図】図1
HEAD-UP DISPLAY DEVICE AND REFLECTIVE OPTICAL SYSTEM
ヘッドアップディスプレイ装置、及び反射光学系
2017-03-02
Patent
Electronic Resource
Japanese
Head-up display device with reflective optical system for vehicle
European Patent Office | 2020
|TARGET REFLECTIVE DIFFUSION SHEET HEAD-UP DISPLAY DEVICE
European Patent Office | 2020
|REFLECTIVE FILM, WINDSHIELD GLASS, AND HEAD-UP DISPLAY SYSTEM
European Patent Office | 2022
|