PICTURE MAGNIFYING/REDUCING OPTICAL DEVICE, ITS MANUFACTURING METHOD, PICTURE MAGNIFYING DISPLAY AND PICTURE REDUCING/READING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a picture magnifying/reducing optical device capable of realizing with a thin type the magnification of the whole picture and the magnification of a pixel size itself without using a conventional projection system. SOLUTION: Light emitted in accordance with a displaying picture of a display 8 is made incident on a high refractive index region 5 from a reduction surface 3 side. Light which meets a total reflection condition in the boundary with a low refractive index region 6 of incident light is propagated toward a magnification surface 4 side while repeating total reflection in the high refractive index region 5. Hereupon, since the cross section of the magnification surface 4 side is larger than the cross section of the reduction surface 3 side in the high refractive index region 5, pixel information made incident from the reduction surface 3 side is emitted in a shape magnified in the magnification surface 4 side and is magnified and displayed in the magnification and display surface 9. That is, the magnification of the whole picture and the magnification of the pixel size itself are performed. At this time, brightness and an angle of visibility are improved by setting the refractive index n1 of the high refractive index region and the refractive index n2 of the low refractive index region so as to meet the relation of n12-n22>=0.07.