The CMOS high-speed photography was used to build a two-dimensional laser-induced phosphorescence temperature measurement system

and a calibration experiment was conducted. The effects of laser energy

mixing ratio between MFG and binder and coating thickness on the decay time of Mg3F2GeO4:Mn (MFG) were studied. The results show that when the temperature of coating exceeds the quenching point

the MFG decay period extends with the coating thickness

and the difference of the MFG decay extension of different coating thicknesses enlarges with the temperature. The excitation energy in the range of 0.3～11.0mJ can excite the MFG phosphorescence. And the level of the excitation energy has a little influence on the MFG decay time

so dose the MFG mixing ratio. However

a properly diluted MFG responds quickly at low temperatures and exists longer at high temperatures. This is a preferred feature for the temperature measurement in complex environments like combustion chamber.