Luminous flux separating optical system

摘要

A color separation prism system for use in a TV camera which can separate R, G and B colors. The color separation prism system of the invention includes one or more air gaps each of which is formed between the prisms in a wedge shape that is open on the converging side of a luminous flux passing through the air gap. The use of the wedge-shaped air gap can reduce the possibility of generation of an astigmatism to thereby prevent deterioration of the performance of an optical system formed of the above-mentioned color separation prisms.