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Product information

Chalcogenide glass is the glass composed of three elements sulfur, selenium,tellurium and other elements arsenic,antimony,germanium,etc (In the VI A group of the periodic table of elements excluding oxygen and polonium) ,or of their own combination, with the following excellent properties:

● Wide infrared transmittance bands and excellent transmittance, the average transmittance after coating(8μm-12μm) can reach 95% or above.

● Chalcogenide glass can be used for asphercial precision mould pressing to reduce the production cost of mass production due to the low Tg, Ts temp.

● With the low dn/dt coefficient, chalcogenide glass is the excellent material for optical design for infrared athermalization lenses that can realize no chromatic aberration and thermal defocus.

NHG can manufacture the various chalcogenide optical glass for mass production while the transmittance range covers 0.6-16μm and refractive index can reach 2.4-3.1. There are many kinds of selections. Meanwhile, NHG has the advanced infrared testing equipment such as high accuracy infrared refractive index tester, high accuracy infrared stress tester, Fourier infrared spectrophotometer and independent R＆D equipment the first crack detector in the industry and infrared stripe tester to guarantee the product quality.

Form of supply

Several forms of products can be provided as required by customers, such as rough block materials, various types of parts (double flat, flat convex, flat concave, convex concave, etc.), bar materials and small balls, provided with products in the specifications with diameters within Φ200mm available in bulk.

Technical information

The difference between the refractive index nλ and Abbe number of each batch of products υ10.6 from the standard value is generally within the following tolerance range：

折射率nλ：±3×10-4 υ10.6：±0.8%

NHG	n10.6 (n4.0)	υ10.6 (υ4.0)	Tg(℃)	ρ(g/cm3)	透過波段(μm)
IRG201	2.4940	95.77	369	4.42	0.7-17
IRG202	2.4925	102.93	292	4.41	0.7-17
IRG203	2.5837	86.07	266	4.71	0.75-18
IRG204	2.7659	132.77	174	4.72	0.9-19
IRG205	2.6011	93.63	282	4.68	0.8-18
IRG206	2.7764	137.71	184	4.63	0.8-19
IRG207	2.6075	154.57	228	4.49	0.75-18
IRG208	n4.0:2.4168	υ4.0:159.19	205	3.19	0.6-12
IRG209	3.1393	207.7	190	5.31	2.5-19

Major application

They can be widely used in infrared monitoring, temperature measurement, medical treatment, detection, guidance, vehicles and other fields.

Chalcogenide glass

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