Table 1.

The tested data between intensity and grayscale level.

Grayscale	Intensity (mW/cm2)	Standard Deviation (mW/cm2)	Grayscale	Intensity (mW/cm2)	Standard Deviation (mW/cm2)
30	0	0	150	6.51	0
40	0.13	0	160	7.85	0.02
50	0.26	0	170	9.95	0.02
60	0.43	0	180	11.5	0.02
70	0.7	0	190	15.73	0.02
80	1.03	0	200	18.91	0.02
90	1.5	0	210	26.15	0.015
100	2	0	220	32.46	0.02
110	2.78	0.005	230	36.22	0.04
120	3.63	0.005	240	42.6	0.025
130	4.47	0.01	250	42.63	0.015
140	5.37	0.005	-	-	-