Shape Analysis of Solidified Photopolymer for the Three Dimensional Photofabrication -Measurement of Critical Exposure-

This paper discusses about critical exposure value for the three dimensional photofabrication. Critical exposure is one of the important parameters for photopolymers to explain solidified depth in a conventional model. In this paper, critical exposures of several photopolymers are measured and the results show that the critical exposure is not constant value contrary to the conventional model but the laser power and scan speed have non-linear relationship. The fact that critical exposure is not constant value affected by exposure condition makes it difficult to compare between experiments under conventional model. This paper also discusses the reason of this non-linear experimental results with the consideration of the extent of reaction of photopolymers.