K 1290
Typical Transmission Limits
		Wavelength (nm)		Transmission (%)
		740		2 % Max
		830-860		50 % Min
		860-2000		70 % Min
Physical Properties
	Nominal Thickness Range				0.180 - 0.220 inch
	Refractive Index				nD = 1.527
	Density				2.67 g/cc
	Thermal Linear Expansion				109E-7 /oC
	Transition Temperature				505 oC
	Annealing Temperature				527 oC
	Deformation Temperature				559 oC
Wavelength	Transmittance
(nm)
700	0.00007
705	0.00009
710	0.00014
715	0.00024
720	0.00038
725	0.00063
730	0.00106
735	0.00179
740	0.00307
745	0.00522
750	0.00889
755	0.01510
760	0.02544
765	0.04189
770	0.06752
775	0.10486
780	0.15637
785	0.22102
790	0.29789
795	0.38093
800	0.46362
805	0.54009
810	0.60376
815	0.65703
820	0.69698
825	0.72896
830	0.75096
835	0.76824
840	0.77991
845	0.78850
850	0.79487
855	0.79697
860	0.79925
865	0.80247
870	0.80253
875	0.79781
880	0.79783
885	0.80295
890	0.81415
895	0.80054
900	0.80601