Enhanced digital light processing-based mask projection stereolithography method and apparatus
First Claim
1. An enhanced digital light processing-based mask projection stereolithography method, wherein comprising the following steps:
- slicing a model of a to-be-prototyped object into layers, converting a layer into a bitmap, and further dividing the layer into a main body area and boundary filling areas;
prototyping, by using a digital light processing unit, the corresponding main body area of the layer of the to-be-prototyped object; and
prototyping by using a laser marking unit, the corresponding boundary filling areas of the layer of the to-be-prototyped object;
wherein the steps of slicing the model of the to-be-prototyped object into layers, converting the layer into the bitmap, and further dividing the layer into the main body area and boundary filling areas comprises;
performing lamination and slicing processing on a three-dimensional model of the to-be-prototyped object to obtain a series of vector sections composed of closed loops;
mapping the vector sections to an image area of a corresponding resolution of the digital light processing unit,converting pixels located inside the closed loops into the bitmap, where the bitmap is defined as the main body area;
recording coordinates of a pixel intersecting with a boundary of the closed loops and intersecting points between the pixel and the boundary of the closed loops;
obtaining pixel parts inside the closed loops of a pixel according to the coordinates and the intersecting points, where each of the pixel parts is less than a size of one pixel, and the pixel parts are defined as the boundary filling areas;
the boundary filling areas are remaining in a vector diagram form.
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Abstract
An enhanced digital light processing-based mask projection stereolithography method and apparatus are disclosed, where the apparatus comprises: a control platform capable of slicing a model of a to-be-prototyped object into layers, converting the layer into a bitmap, and further dividing the layer into a main body area and boundary filling areas; a digital light processing unit that is controlled by the control platform and capable of emitting a first light beam used for the corresponding main body area of the layer of the to-be-prototyped object; and a laser marking unit that is controlled by the control platform and capable of emitting a second light beam used for the corresponding boundary filling areas of the layer of the to-be-prototyped object. The present invention can not only implement high-speed prototyping but also avoid an edge distortion, thereby improving precision of object prototyping.
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Citations
4 Claims
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1. An enhanced digital light processing-based mask projection stereolithography method, wherein comprising the following steps:
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slicing a model of a to-be-prototyped object into layers, converting a layer into a bitmap, and further dividing the layer into a main body area and boundary filling areas; prototyping, by using a digital light processing unit, the corresponding main body area of the layer of the to-be-prototyped object; and prototyping by using a laser marking unit, the corresponding boundary filling areas of the layer of the to-be-prototyped object; wherein the steps of slicing the model of the to-be-prototyped object into layers, converting the layer into the bitmap, and further dividing the layer into the main body area and boundary filling areas comprises; performing lamination and slicing processing on a three-dimensional model of the to-be-prototyped object to obtain a series of vector sections composed of closed loops; mapping the vector sections to an image area of a corresponding resolution of the digital light processing unit, converting pixels located inside the closed loops into the bitmap, where the bitmap is defined as the main body area; recording coordinates of a pixel intersecting with a boundary of the closed loops and intersecting points between the pixel and the boundary of the closed loops;
obtaining pixel parts inside the closed loops of a pixel according to the coordinates and the intersecting points, where each of the pixel parts is less than a size of one pixel, and the pixel parts are defined as the boundary filling areas;
the boundary filling areas are remaining in a vector diagram form. - View Dependent Claims (2, 3, 4)
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Specification