IR Polished KRS5 Thallium Bromide Iodide Window 25mm Ø x 4mm

KRS5 deep infrared material has a high refractive index and is widely used in ATR prisms, windows and lenses for spectroscopy. Combined with germanium, KRS5 can also be used in heat-free insulation IR imaging systems. KRS-5 is grown by sealed Stockbarger crystal growth technology. High purity starting materials are selected to ensure the absence of anion absorption bands between 2μm and 16μm, and all crystals are checked for quality by using a path length of 120mm. CAUTION: Thallium salts are considered toxic and should be handled with care.

Product features：High numerical aperture, excellent collection efficiency、 Compact single lens design、 Diffraction limited design、 RoHS certified

Application area：Deep infrared spectroscopy、 Ultraviolet laser transmission、 X-ray detection、 Infrared optics、 Epitaxial substrate

Unit Price

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Part Number

MP-KRS5-25-4-W

Lead Time

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Stock

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General Parameters

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Dimensional Drawing

Parameter

Transmission wavelength range:	0.6 to 40 μm
Refractive index:	2.371 at 10 μm (1)(3)
Reflection loss:	28.4% at 10 μm (2 surfaces)
Absorption coefficient:	n/a
Reststrahlen Peak:	n/a
dn/dT:	-235 x 10^-6 /°C
dn/dμ = 0:	7 μm
Density:	7.371 g/cc (3)
Melting point:	414.5 °C (3)
Thermal conductivity:	0.544 Wm^-1K^-1 at 293K
Thermal expansion:	58 x 10^-6 /°C (2)
Hardness:	Knoop 40.2 (2)
Specific heat capacity:	200 J Kg^-1K^-1 at 273K
Dielectric constant:	32.5
Youngs Modulus (E):	15.85 GPa (2)
Shear modulus (G):	5.79 GPa (2)
Volume modulus (K):	19.78 GPa (2)
Elastic modulus:	C₁₁=331; C₁₂=13.2; C₄₄=5.79
Apparent elastic limit:	26.2 MPa (2)
Poisson's ratio:	0.369
Solubility:	0.05g/100g water at 293K
Molecular weight:	42 mole% TlBr; 58 mole% TlI
Class/structure:	Cubic,CsCl structure, Pm3m, No cleavage (3)

Note 1: Warning: Thallium salts are toxic and should be handled with caution.

No = Ordinary Ray

µm	No	µm	No	µm	No
0.54	2.68059	1.00	2.44620	1.50	2.40774
2.00	2.39498	3.00	2.38574	4.00	2.38204
5.00	2.37979	6.00	2.37797	7.0	2.37627
8.0	2.37452	9.0	2.37267	10.0	2.37069
11.0	2.36854	12.0	2.36622	13.0	2.36371
14.0	2.36101	15.0	2.35812	16.0	2.35502
17.0	2.35173	18.0	2.34822	19.0	2.34451
20.0	2.34058	21.0	2.33643	22.0	2.33206
23.0	2.32746	24.0	2.32264	25.0	2.31758
26.0	2.31229	27.0	2.30676	28.0	2.30098
29.0	2.29495	30.0	2.28867	31.0	2.28212
32.0	2.27531	33.0	2.26823	34.0	2.26087
35.0	2.25322	36.0	2.24528	37.0	2.23705
38.0	2.22850	39.0	2.21965	40.0	2.21047

Transmission curve

Original model example

PN#	Dimension(D×L)(mm)	diameter(D)	Thickness(L)	S/D	Material Grade
KRS5P10-2	10.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P12X2	12.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P13-2	13.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P20-2	20.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P25-2	25.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P25-4	25.0mm×4.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P32-3D	32.0mm×3.0mm Punched	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P32-3	32.0mm×3.0mm Not punched	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P35X2	35.0mm×2.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P42X3	42.0mm×3.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P50X4	50.0mm×4.0mm	+0.2/-0.0mm	±0.1mm	60/40	IR

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