DIAPOSITIVE AND DIAFILM PROJECTION DEVICE

摘要

The invention concerns a device for slide projection in natural light that is used mainly in education institutions.In accordance with this invention, the device consists of a cuboid case placed on a base plate on wheels. A square hole is drilled in the case, enabling the images from the projection device to be projected by means of a periscope-type two-mirrored system, mounted at a 45-degree angle and turning the image upside down. The image is then reflected to a thin frosted glass translucent screen. A layer of reflecting substance is applied on the lower part of the screen, helping to increase contrast. The screen is placed in a protective frame.