Method of making a three-dimensional object by stereolithography

Details Method of making a three-dimensional object by stereolithography Method of making a three-dimensional object by stereolithography

1991-05-17

1993-01-26

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

1562733, 1562735, 1562755, 156290, 1563071, 2504921, 264308, 264DIG59, 395119, 364476, 364522, 365106, 365107, 427510, 427581, 427586, B29C 3508, B29C 4102

Patent

active

051820552

ABSTRACT:
An improved method for stereolithographically making an object by alternating the order in which similar sets of vectors are exposed over two or more layers. In another method, a pattern of tightly packed hexagonal tiles are drawn. Each tile is isolated from its neighboring tiles by specifying breaks of unexposed material between the tiles. Using an interrupted scan method, vectors are drawn with periodic breaks along their lengths. In another method, modulator and scanning techniques are used to reduce exposure problems associated with the acceleration and deceleration of the scanning system when jumping between vectors or changing scanning directions.

REFERENCES:
patent: 4575330 (1986-03-01), Hull
patent: 4863538 (1989-09-01), Deckard
patent: 4961154 (1990-10-01), Pomerantz et al.
Kodama, Rev. Sci. Instrum. 52(11), Nov. 1981, "Automatic Method For Fabricating A Three Dimension Plastic Model with Photo-Hardening Polymer" pp. 1770-1773.
Herbert, A. J., Journal of Imaging Technology, vol. 15, No. 4, Aug. 1989, "A Review of 3D Solid Object Generation", pp. 186-190.
Herbert, A. J. Journal of Applied Photographic Engineering, vol. 8, No. 4 pp. 185-188, Aug. 1982, "Solid Object Generation".
Requicha, A. A. G. et al. "Solid Modeling: a historical summary and contemporary assessment". Institute of Electrical and Electronics Engineers Computer Graphics and Applications. (1982, pp. 9-24).

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