EVALUATION METHOD OF IMAGE SHIELD PROPERTY OF SCREEN AND METHOD FOR CREATING FIGURE FOR EVALUATING THE IMAGE SHIELD PROPERTY

To exactly indicate a use method of a screen matched to a use scene to a purchaser of the screen.SOLUTION: There are arranged an evaluation chamber 12 in which an indoor illumination 11 is arranged, and a window 17 covered with a screen 16 which is arranged at a wall 14 for partitioning an outdoor space 13 of the evaluation chamber. The outdoor space is formed so as to artificially changeable for a daytime environment and a nighttime environment. When setting difficulty in seeing outdoors from indoors in a screen at the turn-off of the indoor illumination at the daytime environment, difficulty in seeing indoors from outdoors in the screen at the turn-off of the indoor illumination at the daytime environment, difficulty in seeing outdoors from indoors in the screen at the turn-on of the indoor illumination at the nighttime environment, difficulty in seeing indoors from outdoors in the screen at the turn-on of the indoor illumination at the nighttime environment, difficulty in seeing outdoors from indoors in the screen at the turn-on of the indoor illumination at the daytime environment, and difficulty in seeing indoors from outdoors in the screen at the turn-on of the indoor illumination at the daytime environment as image shield properties in first to sixth environments, two or more image shield properties selected from a group which is composed of the image shield properties of six environments of the first to sixth environments are quantitatively evaluated by an evaluator.SELECTED DRAWING: Figure 1 【課題】使用場面に合せたスクリーンの使い方をスクリーンの購入者に的確に提示する。【解決手段】室内照明１１が設けられた評価室１２とこの評価室の室外空間１３を仕切る壁１４にスクリーン１６で覆われた窓１７を設け、室外空間を人工的に昼環境又は夜環境に変更可能に構成する。昼環境の室内照明消灯時のスクリーンの室内から室外への見通しにくさ、昼環境の室内照明消灯時のスクリーンの室外から室内への見通しにくさ、夜環境の室内照明点灯時のスクリーンの室内から室外への見通しにくさ、夜環境の室内照明点灯時のスクリーンの室外から室内への見通しにくさ、昼環境の室内照明点灯時のスクリーンの室内から室外への見通しにくさ、及び昼環境の室内照明点灯時のスクリーンの室外から室内への見通しにくさをそれぞれ第１〜第６環境の遮像性とするとき、第１〜第６の６つの環境の遮像性からなる群より選ばれた２つ以上の遮像性を定量的に評価者が評価する。【選択図】図１