Patent ID: 8827463

Claim:
A projector comprising: a projection optical system that projects video light; and an anamorphic prism optical system for converting an aspect ratio of an irradiation region on which the video light is irradiated, wherein the anamorphic prism optical system includes: a first prism set obtained by combining a first prism and a second prism on which the video light emitted from the first prism is made incident; and a second prism set obtained by combining a third prism on which the video light emitted from the second prism is made incident and a fourth prism on which the video light emitted from the third prism is made incident, the first prism, the second prism, the third prism, and the fourth prism each have an individual rotation axis respectively, rotation amounts of the first prism, the second prism, the third prism, and the fourth prism are respectively adjusted by operations independent from each other, and a space between the first and second prism sets is adjustable in association with the rotation of the first prism, the second prism, the third prism, and the fourth prism.