| 摘要 |
<p>The present invention relates to a method and a device for creating at least one temporary computer-controlled mask (4a) adapted to selectively transmit electromagnetic radiation, comprising the steps of providing a transparent plate (1) having two sides, wherein a capacitive layer (9, 10) is arranged on one of the sides of the transparent plate (1); providing a powder chamber (3) for storing powder particles (4) adapted to prohibit radiation impinging on a masking pattern (4a) formed by the powder particles (4) from reaching certain areas of a particulate build material (20); suspending at least some of the powder particles (4) in the powder chamber (3); depositing electrostatic charges (11) in or on the capacitive layer (9, 10) of the transparent plate (1); generating an electrostatic field in the powder chamber (3), so that at least some of the powder particles (4) become charged; and directly transferring the charged powder particles (4) to the transparent plate (1), thereby forming the masking pattern 4a.</p> |
