Patent ID: 8636366

Claim:
A lighting apparatus comprising: a laser source emitting light; a light guide that guides the light to an illumination object; a first mirror that is disposed on an entrance plane side of the light guide to reflect the light advancing toward the entrance plane side in the light guide to an exit plane side of the light guide; a diffusion plate disposed adjacently to the first mirror; a reflective polarizing plate disposed on the exit plane side of the light guide; a wavelength plate disposed between the light guide and the reflective polarizing plate; and a second mirror disposed between the laser source and the first mirror, wherein the first mirror includes an aperture formed to allow at least the light from the laser source to pass, wherein the second mirror includes an aperture in a center of the second mirror so as to allow at least the light linearly advancing from the laser source to pass, wherein the diffuser diffuses the light linearly advancing from the laser source to become diffused light having a spread angle, and wherein the second mirror reflects the light reflected by the reflective polarizing plate and leaked from the aperture of the first mirror toward the aperture of the first mirror.