2-dimensional image display apparatus, an illumination light source and the exposure illumination system

2-dimensional beam scanning unit (2) comprises a red laser light source (1a), to reflect the respective beam emitted from the green laser light source (1b) and the blue laser light source (1c) is scanned in two-dimensional directions, the diffuser ( 3a, 3b, 3c), each light beam is diffused by the spatial light modulator (5a to be scanned in two-dimensional directions, 5b, leads to 5c), each spatial light modulator (5a, 5b, 5c) is modulates each light in response to each color video signal, a dichroic prism (6) leads to light of the three colors after modulation to multiplexing to the projection lens (7), a color image on the screen (8) There is displayed. Since two-dimensional light emitted from the beam scanning unit irradiates the being diffused spatial light modulator above, it is constantly changing the optical axis of the beam to be irradiated is emitted from the light diffusion member a spatial light modulator it can be, it is possible to effectively suppress speckle noise.