Patent ID: 7399084

Claim:
A laser image display apparatus comprising: a laser light source; a light diffuser containing light diffusing elements, the light diffusing elements moving, swaying or oscillating; an illumination optical system which irradiates rays of light from the laser light source to the light diffuser; a spatial light modulator which is arranged near the light diffuser and irradiated by rays of light diffused by the light diffuser to produce image; and a projection lens which projects to a predetermined plane in space an image produced by the spatial light modulator, wherein a light diffusing angle θ of the light diffuser, a pitch P of transmission irregularity generated in the light scattering means, a numerical aperture NA of the illumination optical system, and a distance L between the spatial light modulator and the light diffuser have a relationship of P<2×tan(θ/2+Sin −1 (NA))×L.