| 摘要 |
PROBLEM TO BE SOLVED: To provide an image projection system capable of distinguishing images plotted by users for each user.SOLUTION: An image projection system for detecting a position pointed by a pointer on a projection screen on which an image is projected includes: first light emission means for projecting curtain-like light in parallel with the projection screen at a first distance from the projection screen; second light emission means for projecting the curtain-like light in parallel with the projection screen at a second distance longer than the first distance from the projection screen; and light reception means for receiving light projected by the first light emission means and the second light emission means, and reflected by the pointer. |
