Kopp IR Transmitting/VIS Absorbing - 2540

IR Transmitting/VIS Absorbing - 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	n_D = 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

IR Transmitting/VIS Absorbing - 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

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