| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection system capable of suppressing the occurrence of speckle noise at the predetermined position, while making projection light lighter.SOLUTION: A projection system includes a plurality of projection devices for projecting light to a planar projection target body. The projection device has a light source part for emitting a laser beam. The plurality of projection devices are configured such that larger the intersection angle is between the direction of the optical axis of light reflected by the projection target body and the direction directed to a predetermined position from the position on the projection target body of the optical axis, the smaller the wavelength difference is between the maximum center wavelength and the minimum center wavelength in each color wavelength region.SELECTED DRAWING: Figure 3 |
