Patent ID: 7756403

Claim:
Light irradiation heating process using a light irradiation heating device which has lamp units with at least one light emitting part and in which the intensity of the light emitted from the each light emitting part can be controlled individually, comprising the steps of: (a) measuring the following local distributions: the local distribution of a physical property of raw material molecules in a space between the at least one light emitting part of the lamp units and the article to be treated, (b) determining the pattern of the distribution of the light intensity on the article to be treated based on measurements obtained by said measuring step to impart a desired physical property to the article which has been treated by light heating, (c) determining a respective intensity of the light emitted from the above described at least one light emitting part according to the pattern of the light intensity determined in the preceding step (b), and individually controlling light intensity from the at least one light emitting part of the lamp units so as to irradiate the article to be treated with light in accordance with the intensity of the light emitted from the respective light emitting part determined in the preceding step(c).