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System and method for computed axial lithography (CAL) for 3D additive manufacturing

An optical subsystem, 3D technology, applied in the direction of processing and manufacturing, manufacturing tools, additive manufacturing, etc., can solve problems such as geometric shape restrictions

Pending Publication Date: 2020-03-17
LAWRENCE LIVERMORE NAT SECURITY LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the constant cross-section along each of the three orthogonal directions, the geometry achievable by the method of Shusteff et al.

Method used

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  • System and method for computed axial lithography (CAL) for 3D additive manufacturing
  • System and method for computed axial lithography (CAL) for 3D additive manufacturing
  • System and method for computed axial lithography (CAL) for 3D additive manufacturing

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Embodiment Construction

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0024] The method described in the present disclosure fabricates structures by applying computed tomography (CT) techniques in reverse, by exposing a body of photopolymer resin with a 3D light field from multiple angles and updating the light field at each angle , to realize body manufacturing. The necessary optical fields are multiplexed spatially and / or temporally such that their total energy dose in the target resin volume crosslinks the resin into a user-defined geometry. These light fields may be static or dynamic and may be generated by any suitable mechanism such as a spatial light modulator (SLM). The SLM controls the phase or amplitude, or possibly both, of the light field to provide the necessary intensity distribution. The light fields at each angle Θ may be generated simultaneously or sequentially in time. In the case of sequential generation, light fields ...

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Abstract

A method of forming a three dimensional (3D) object is disclosed. The method may involve providing a volume of photo-curable resin contained within an optically transparent resin container, and simultaneously directing optical projections from an optical subsystem at a plurality of angles [theta] through the volume of photo-curable resin. The optical beams are directed about a z axis extending through the volume of photo-curable resin. Each of the projections is provided with a calculated 2D spatial intensity function which creates a 3D intensity map. The projections act over a fixed temporalexposure period, during which the net exposure dose is sufficient to cure select portions of the volume of photo-curable resin, and to leave other portions uncured, to form a desired 3D part.

Description

[0001] Cross References to Related Applications [0002] This application is a PCT International Application of US Patent Application No. 15 / 593,947 filed on May 12, 2017. The entire disclosure of the above application is incorporated herein by reference. [0003] Statement of Government Rights [0004] U.S. Government under Contract No. DE-AC52-07NA27344 between the U.S. Department of Energy and Lawrence Livermore National Security, LLC for the operation of the Lawrence Livermore National Laboratory No., have rights to the invention. technical field [0005] The present disclosure relates to systems and methods for performing additive manufacturing, and more particularly to systems and methods related to volumetric fabrication using computed tomography (CT) techniques. Background technique [0006] This section provides background information related to the present disclosure which is not necessarily prior art. [0007] Additive manufacturing (AM) fabrication methods ar...

Claims

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Application Information

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IPC IPC(8): B29C64/106B29C64/264B29C64/393B33Y30/00B33Y40/00B33Y50/02
CPCB29C64/106B29C64/264B29C64/393B33Y30/00B33Y50/02B33Y10/00B29C64/232B29C64/241B29C64/129B29C64/135B29C64/245B29C64/277B29C64/35B33Y40/20B29C64/124B29C64/268B29C64/255B33Y70/00
Inventor 布雷特·凯利罗伯特·帕纳西马克西姆·舒斯特夫克里斯托弗·斯帕达奇尼海登·泰勒因德拉森·巴塔查里亚
Owner LAWRENCE LIVERMORE NAT SECURITY LLC