| 摘要 |
PROBLEM TO BE SOLVED: To substantially eliminate the distortion of reproduced image even if a diffraction angle is increased and to increase the degree of design freedom of a reproduction device by correcting the positions of a light source and a screen by using the position information of the light source and screen with respect to a coordinate system when the diffraction angle at a computer hologram (CGH) is calculated. SOLUTION: The position of the screen of the CGH reproduced image, the position of the light source (BS) and the position of CGH are determined (S1). A CGH pattern is designed (S2). The coordinates of BS, CGH and the spot on the screen are determined (S3). The coordinates of the screen are converted (S4). The diffraction angles in (x) and (y) directions of the diffracted light in the transmission type CGH are calculated from BS, CGH and the spot on the screen (S5). When CGH is formed by using these diffraction angles, correction is necessary in the case the reproducing light is made incident at an angle exclusive of perpendicularity. This correction is fitted to the calculation using the diffraction angle when the reproducing light is made incident perpendicuarly on the surface of CGH after the calculation of the degree of distortion is carried out reversely.
|
