Light distribution characteristic measuring device and light distribution characteristic measuring method

摘要

PROBLEM TO BE SOLVED: To provide a light distribution characteristic measurement device and a light distribution characteristic measurement method with which it is possible to measure a light distribution characteristic with high accuracy for even a light source having strong directivity.SOLUTION: The light distribution characteristic measurement device includes an image-capturing unit disposed apart from a light source by a prescribed distance, a movement mechanism for making the position of the image-capturing unit relative to the light source changed continuously while maintaining the distance between the light source and the image-capturing unit, and processing means for calculating the light distribution characteristic of the light source. The processing means acquires a plurality of image data captured under a first image-capture condition and a plurality of image data captured under a second image-capture condition different from the first image-capture condition, as well as determines image information after correction that corresponds to a relative position of interest from first image information corresponding to a relative position of interest included in the image data captured under the first image-capture condition and second image information corresponding to a relative position of interest included in the image data captured under the second image-capture condition.SELECTED DRAWING: Figure 8