Measurement of Flame Front Structure and Its Thickness by Planar and Local Chemiluminescence of OH*, CH* and C2*

We have measured the local flame front structure and its thickness using high speed three CCD camera and Developed Cassegrain optics, which could measure local OH*, CH* and C₂* radicals at a point. The time-series OH*, CH* and C₂* planar images are compared to those measured by local radical. The results show that the CH* and C₂* signals can be a nice marker of flame front structure and its thickness, while OH* has some uncertainty.