Tri-color separating optical system.

摘要

To form three different color optical images in close vicinity to each other on the same image forming plane in a tri-color separating optical system, the optical system comprising a lens for focusing a subject optical image on a green optical image forming plane (Ig); dichroic mirrors (Db and Dr) or a dichroic prism for directly passing a green color image and reflecting a blue color image in the first direction and a red color image in the second direction; a first prism (Pb) having therein a total reflection surface (Mb) and an extended optical path length for reflecting the blue color image to a blue optical image-forming plane (Ib); and a second prism (Pr) having therein a total reflection surface (Mr) and an extended optical path length for reflecting the red color image to a red optical image-forming plane (Ir).