Oxygen-free chalcogenide infrared optical glass

Oxygen-free infrared optical glass (IKC type) is intended for fabrication of optical devices operating in the infrared region within the wave lengths of 1.0 – 16.5 microns.

The composition of infrared glasses includes the following: sulfur, selenium, tellurium, germanium, arsenous sulphide (Às₂S₃) and other chemical elements.

LZOS Company manufactures 9 types of infrared glass: IKC23, IKC24, IKC25, IKC27, IKC28, IKC29, IKC32, IKC33, IKC34.

oxygen-free infrared glass IKC type

glass type	application
IKC23, IKC24, IKC25, IKC28, IKC29, IKC30	light filter, shielding plate, protective hood
IKC27, IKC33	light filter
IKC23, IKC25, IKC29, IKC30, IKC31, IKC34, IKC32	lens system, prism, optical wedge
all types	semiconductor device

Glass types IKC27 and IKC33 – oxygen-free light filters. IKC27 has alternating transmission shortwave limit within spectral region 1.7-3.7 microns.

IKC33 is light filter for the region 7.5-16 microns.

IKC23 and IKC24 are transparent within region 0.7-11 microns.

IKC25, IKC28, IKC29, IKC34, IKC32 are transparent within spectral region 1-17 microns.

Oxygen-free infrared glasses properties are presented below.

Oxygen-free infrared optical glass is supplied in form of discs by batches or single piece:

glass type	wavelength (microns)	transmission coefficient
IKC23	1.4	0.66
	2.0	0.68
	3.0	0.60
	4.0 - 7.5	0.68
	8.0	0.65
	9.0	0.42
IKC24	1.4	0.63
	2.0 - 3.5	0.65
	4.0	0.60
	4.5 - 7.0	0.67
	7.8	0.55
	10.0	0.58
IKC28	2.0	0.60
	4.0 - 8.0	0.63
	9.0	0.60
	10.0	0.56
	11.0	0.53
	12.0	0.50
IKC32	2.0	0.53
	3.0 - 10.0	0.60
	11.0	0.56
	12.0	0.35
	14.0	0.40
IKC29	2.0	0.60
	2.8	0.57
	3.5	0.62
	4.5	0.57
	5.5	0.65
	6.3	0.62
	7.0 - 11.0	0.65
	12.0	0.60
	13.0 - 14.0	0.51
IKC34	1.4	0.60
	2.0	0.62
	3.0 - 11.0	0.65
	12.5	0.45
	14.0	0.55
IKC25	2.0	0.56
	3.0	0.60
	4.0 - 12.0	0.61
	14.0	0.43
	16.0	0.43
IKC27	6.0 - 10.0	0.63
IKC33	10.0 - 12.0	0.60
	13.0	0.50

Transmission coefficient is indicated for 3 mm layer of glass IKC27, IKC33 types and for 10 mm layer of other glass types.

wavelength (micron)	refractive index n of glass types
	IKC23	IKC24	IKC28	IKC29	IKC34	IKC32	IKC25	IKC27	IKC33
2.0	2.4261	2.4098	2.7285	2.6381	2.6283	3.0351	2.8081	-	-
10.0	-	-	2.6875	2.6006	2.5941	2.9731	2.7675	-	2.673

Abbe number	refractive index n of glass types
	IKC23	IKC24	IKC28	IKC29	IKC34	IKC32	IKC25	IKC27	IKC33
v2	201	196	146	149	166	107	131	-	-
v10	-	-	111	122	131	113	152	-	-

property	designation	glass type
		IKC23	IKC24	IKC28	IKC29	IKC32	IKC34	IKC25	IKC27	IKC33
density	g/cm3	3.32	3.89	4.43	4.74	5.66	4.47	4.72	4.89	4.97
stress-optical coefficient at lambda = 2.0 microns	V 1012 (Pa-1)	1020	-326	2703	2244	2000	1000	3162	-	-
thermal coefficient of linear expansion:	at oC-1	-	-	-	-	-	-	-	-	-
from –60 to 20 oC	-	205	162	197	183	133	114	197	-	-
from +20 oC to Òs	-	246	182	220	220	147	125	220	177	225

More detailed information about infrared glass specifications and terms of supply can be submitted as for your request additionally.

Attention! LZOS Company is able to produce blanks with any dimensions and quality according a Customer specific inquiry!!!