This paper describes a new optical device, called "Relay-Lens Plate", which displaces a real image, displayed on the back surface of a thick glass plate, toward and beyond the front surface of the glass plate. This device has advantages of a small distortion for the image and a small thickness over an ordinary relay lens system, and also has advantages of a large area for the image and mechanical strength over a fiber plate. Experiments and design method of optical barriers, necessary to this device, are described and discussed.