Kopp 2540
	Note: Graph and tabular data at 2.50 mm
	Filter Specifications
		Transmission at 750 nm must be < 0.025%
		Transmission at 900 nm must be 20 ± 1.4%
	Physical Properties
		Nominal Thickness Range					1.9 - 3.1 mm
		Refractive Index					nD = 1.57
		Density					2.49 g/cm3
		Thermal Linear Expansion					92E-7 /ºC (30-300 ºC)
		Strain Temperature					473 ºC
		Annealing Temperature					512 ºC
		Deformation Temperature					690 ºC
			Kopp 2540
		Wavelength	Transmission		Wavelength	Transmission		Wavelength	Transmission
		(nm)	(%)		(nm)	(%)		(nm)	(%)
		200	0.00		435	0.00		670	0.00
		205	0.00		440	0.00		675	0.00
		210	0.00		445	0.00		680	0.00
		215	0.00		450	0.00		685	0.00
		220	0.00		455	0.00		690	0.00
		225	0.00		460	0.00		695	0.00
		230	0.00		465	0.00		700	0.00
		235	0.00		470	0.00		705	0.00
		240	0.00		475	0.00		710	0.00
		245	0.00		480	0.00		715	0.00
		250	0.00		485	0.00		720	0.00
		255	0.00		490	0.00		725	0.00
		260	0.00		495	0.00		730	0.00
		265	0.00		500	0.00		735	0.00
		270	0.00		505	0.00		740	0.01
		275	0.00		510	0.00		745	0.01
		280	0.00		515	0.00		750	0.02
		285	0.00		520	0.00		755	0.02
		290	0.00		525	0.00		760	0.03
		295	0.00		530	0.00		765	0.05
		300	0.00		535	0.00		770	0.08
		305	0.00		540	0.00		775	0.11
		310	0.00		545	0.00		780	0.16
		315	0.00		550	0.00		785	0.23
		320	0.00		555	0.00		790	0.31
		325	0.00		560	0.00		795	0.43
		330	0.00		565	0.00		800	0.58
		335	0.00		570	0.00		805	0.77
		340	0.00		575	0.00		810	1.02
		345	0.00		580	0.00		815	1.30
		350	0.00		585	0.00		820	1.67
		355	0.00		590	0.00		825	2.11
		360	0.00		595	0.00		830	2.61
		365	0.00		600	0.00		835	3.22
		370	0.00		605	0.00		840	3.93
		375	0.00		610	0.00		845	4.72
		380	0.00		615	0.00		850	5.62
		385	0.00		620	0.00		855	6.64
		390	0.00		625	0.00		860	7.77
		395	0.00		630	0.00		865	8.99
		400	0.00		635	0.00		870	10.23
		405	0.00		640	0.00		875	11.84
		410	0.00		645	0.00		880	13.19
		415	0.00		650	0.00		885	14.95
		420	0.00		655	0.00		890	16.24
		425	0.00		660	0.00		895	18.51
		430	0.00		665	0.00		900	20.03