ILLUMINANCE METER LIGHT RECEIVING DEVICE

摘要

PURPOSE:To measure illuminance which has high correlation to how the face is viewed by circumscribably or inscribably providing a light shielding plate which can turn in a circumferential direction on a light receiving window. CONSTITUTION:The light shielding plate 22 is circumscribably set on the light receiving window 21 of the title device. By providing a slit-shaped hole 23 on said plate 22 and fixing the plate 22 to the internal screw part of a cylinder by a screw 24 through the slit-shaped hole 23, the light shielding plate 22 can be fixed on an optional position. By mounting the light shielding plate 22 like this on a semicylindrical surface illuminance meter light receiving part and fixing it on a specified position, a light receiving angle against the center of the light receiving window 21 can be set on the optional position. When the light receiving angle is set against a specified evaluation category, the illuminance having high correlation to how the face is viewed can be obtained.