METHOD AND DEVICE FOR PRODUCING A THREE-DIMENSIONAL OBJECT AND EXPOSURE MASK GENERATING APPARATUS

摘要

The invention relates to a method for producing a three-dimensional object by layer by layer solidifying of a material which is solidifiable under the action of radiation, making use of exposure masks, wherein in order to form each object layer to be solidified of the object in a construction plane, there is generated at least one, preferably a single, digital exposure mask by means of which the radiation is selectively projected into the construction plane, wherein for each exposure mask, according to the object layer to be solidified, a single 2-bit bitmap is calculated which assigns either the bit-value “transparent” or the bit-value “non-transparent” to each pixel of the exposure mask. In addition, an improved exposure mask generating apparatus and an improved device for producing a three-dimensional object are proposed.

主权项

1. Method for producing a three-dimensional object by layer by layer solidifying of a material which is solidifiable under the action of radiation, making use of exposure masks, wherein in order to form each object layer to be solidified of the object in a construction plane, there is generated at least one, preferably a single, digital exposure mask by means of which the radiation is selectively projected into the construction plane, wherein for each exposure mask, according to the object layer to be solidified, a single 2-bit bitmap is calculated which assigns either the bit-value “transparent” or the bit-value “non-transparent” to each pixel of the exposure mask, wherein the bit-value “transparent” is assigned to at least one surface region of the 2-bit bitmap having a structure size below a limit structure size and wherein an exposure texture is assigned to each surface region above the limit structure size, said exposure texture being configured in the form of a pattern of pixels with the bit-values “transparent” and “non-transparent”.