Novel hexagonal form factor of chromaticity distribution of color speckle

Novel hexagonal form factor for evaluating chromaticity distribution of color speckle using red, green, and blue lasers is proposed. The measured color speckle distribution data were plotted on CIE 1931 chromaticity diagram. Only the small amount of outer rim data was extracted from the whole data of the chromaticity distribution to introduce the novel form factor. Specifically, the highest 1% and the lowest 1% of each of red, green, and blue monochromatic speckle data were picked up to form six outer rim regions. The average chromaticity coordinates of the six regions corresponding to hexagonal apexes are appropriate for evaluating the form factor of the chromaticity distributions, clarifying the distinctive difference between the measured and the calculated color speckle distributions.