The Pseudocolor Coding Methods in the Rainbow Holography and the Slit Width Design

Based on the principle of three basic colors, the commonly used pseudocolor coding methods, the multislits coding method and the reference beam coding method, are analyzed. According to them, the pseudocolor rainbow holograms with desired colors can be made by changing the width between the slits or the angle between the reference light beams. The optimized slit width is given, which is commonly 5mm to 8mm.