DEVICE OF DISPLAYING INFORMATION ON INSIDE OF WATER TANK, AND PROJECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a device of displaying information on the inside of a water tank that can display a virtual image having high luminance in the inside of a water tank with a simple configuration including a projector part and an intermediate screen.SOLUTION: A device of displaying information on the inside of a water tank 100 of the present invention is a device of displaying information on the inside of a water tank 100 that causes a viewer to visually recognize a display as a virtual image in the inside of a water tank from the viewer's visual area assumed in advance, comprises a projector part 83 that projects an image and an intermediate screen 40 that forms the image projected by the projector part 83 into an image, and performs display by reflecting the image formed by the intermediate screen 40 on a water tank wall part 90.SELECTED DRAWING: Figure 1