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Oxygen-free chalcogenide infrared optical glass Print

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 (Аs2S3) 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 typeapplication
IKC23, IKC24, IKC25, IKC28, IKC29, IKC30light filter, shielding plate, protective hood
IKC27, IKC33light filter
IKC23, IKC25, IKC29, IKC30, IKC31, IKC34, IKC32lens system, prism, optical wedge
all typessemiconductor 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 typediameter (mm)diameter to thickness ratio
IKC23, IKC24, IKC28, IKC29, IKC34, IKC2525-370from 3:1 up to 10:1
IKC3225-150
IKC2725-100thickness more than 5 mm
IKC3330-50thickness 6-7 mm

 

 

Spectral response characteristics of oxygen-free infrared optical glasses

glass typewavelength (microns)transmission coefficient
IKC231.40.66
2.00.68
3.00.60
4.0 - 7.50.68
8.00.65
9.00.42
IKC241.40.63
2.0 - 3.50.65
4.00.60
4.5 - 7.00.67
7.80.55
10.00.58
IKC282.00.60
4.0 - 8.00.63
9.00.60
10.00.56
11.00.53
12.00.50
IKC322.00.53
3.0 - 10.00.60
11.00.56
12.00.35
14.00.40
IKC292.00.60
2.80.57
3.50.62
4.50.57
5.50.65
6.30.62
7.0 - 11.00.65
12.00.60
13.0 - 14.00.51
IKC341.40.60
2.00.62
3.0 - 11.00.65
12.50.45
14.00.55
IKC252.00.56
3.00.60
4.0 - 12.00.61
14.00.43
16.00.43
IKC276.0 - 10.00.63
IKC3310.0 - 12.00.60
13.00.50

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

 

 

Refractive indexes of oxygen-free infrared optical glass types

wavelength (micron)refractive index n of glass types
IKC23IKC24IKC28IKC29IKC34IKC32IKC25IKC27IKC33
2.02.42612.40982.72852.63812.62833.03512.8081--
10.0--2.68752.60062.59412.97312.7675-2.673

Abbe numberrefractive index n of glass types
IKC23IKC24IKC28IKC29IKC34IKC32IKC25IKC27IKC33
v2201196146149166107131--
v10--111122131113152--

 

v2 = (n2.0 - 1) / (n1.8 - n2.2)
v10 = (n10.0 - 1) / (n8.0 - n12.0)

 

 

Infrared glasses properties

propertydesignationglass type
IKC23IKC24IKC28IKC29IKC32IKC34IKC25IKC27IKC33
densityg/cm33.323.894.434.745.664.474.724.894.97
stress-optical coefficient at lambda = 2.0 micronsV 1012 (Pa-1)1020-32627032244200010003162--
thermal coefficient of linear expansion:at oC-1---------
from –60 to 20 oC-205162197183133114197--
from +20 oC to Тs-246182220220147125220177225

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!!!
 
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