The UPE (Ultraweak photon emission from biological objects), is an intrinsic and spontaneous process in biological objects. The DL-Delayed Luminescence, is the photon emission from biological objects induced by light. DL is much more than emission by itself. Since discovered it, scientists have made a lot of research. According to recent research, UPE reflects vital functions of biological objects. Although we can't tell the mechanism of these photon emissions definitely now, it has been applied to many domains.This paper introduces the experimental and theoretical advances of UPE detecting during the recent time, and analysis the coherent states theory which widely accepted at present. Using photon counting system, we detect the DL of six kinds of anti-cancer plants and two kinds of ordinary plants outside under the sufficient sunlight. We contrast the differences of application half rotation ellipsoid cavity or not. The results are shown that the efficiency of collecting photons for the system with the half cavity is evidently raised and DL change with the change of its own organism function. The experiment shows that the delayed luminescence accord with the double e like oscillations, but the coherent states theory at present cannot explain this kind of rule. |