HOLOGRAM COLOR CORRECTION PLATE AND PROJECTION SCREEN USING THE SAME

摘要

PROBLEM TO BE SOLVED: To make a hologram color correction plate emits light of plural colors entering from different directions to the same direction by using holograms and to obtain a projection screen using the color correction plate. SOLUTION: This hologram color correction plate 10 diffracts the light 6G, 6R, 6B of plural wavelengths entering from the different directions at different angles according to the wavelengths by the holograms 1G and 1B and emits 7W the light to the same direction. The holograms 1G and 1B are of a transmission type, allows the transmission of the light 6R of the one wavelength as it is with substantially no diffraction and diffracts the light 6G and 6B of the other wavelengths at the different angles according to the wavelengths.