Detection of ultra-weak photon emission from rice grain using Imaging techniques, and estimation of its fat acidity index [Japanese]

摘要

The purpose of this study is to develop a new method of rice grain quality evaluation by using an imaging technique based on ultra-weak photon counting. Images of the ultra-weak photon emission from rice grain were acquired and analyzed. The photon emission from rice grain was very weak at room temperature but became detectable by imaging techniques when the measurement temperature was risen. We can acquire clear photon-counting images at 50degreesC with a 10-minute integration. Furthermore, the imaging technique clarified that there was significantly high photon emission from unripe grain (polished rice). As the results of spectrum analysis, there was a characteristic peak at 670-680 nm in the photon emission of the rice.