Patent ID: 8529072

Claim:
An image projecting device configured to project an image onto a screen, comprising: an image forming element configured to form an image; a light source configured to generate light to illuminate the image forming element; and an imaging optical system configured to image an image formed by the image forming element on a screen, wherein the image projecting device further comprises: a first prism having a first transmission surface configured to transmit light generated from the light source therethrough, a reflection curved surface being a curved surface configured to directly reflect light having transmitted through the first transmission surface, a reflection-transmission surface configured to directly reflect light reflected from the reflection curved surface to the image forming element and transmit light reflected from the image forming element therethrough, and a second transmission surface configured to transmit light reflected from the reflection-transmission surface therethrough and transmit light reflected from the image forming element therethrough; and a second prism configured to direct light having transmitted through the reflection-transmission surface of the first prism to the imaging optical system.