| 摘要 |
PURPOSE: An opaque projective screen and a three-dimensional expression method of laser light are provided to save equipment and maintenance/repair costs and to display a screen image on which a speckle noise is remove upon using laser light regardless of the light amount projected from the outside. CONSTITUTION: A projective space unit(100) is made up of a projector and an opaque projective screen(10) separated from each other at a certain distance in a transparent closed space. The projective space unit forms on a lower end side and has more than one supply hole(30) for supplying smog to the closed space. Further, a smog discharger(36) for discharging the smog through more than one discharge hole(34) is formed on an upper end of the projective space unit. The discharger uses a device for absorbing and discharging air such as an air compressor. The supply and discharge holes are connected to each smog supplier and smog discharge hole(34) by a pipe. |
