IR Polished KRS5 Thallium Bromide Iodide Window 25mm Ø x 2mm

KRS5, a deep infrared material with a high refractive index, is widely used in ATR prisms, windows, and lens spectroscopy. When combined with germanium, KRS5 can also be utilized in athermalized IR imaging systems. KRS-5 is produced using the sealed Stockbarger crystal growth technique. The highest purity starting materials are selected to ensure no anionic absorption bands between 2 μm and 16 μm, and the quality of all crystals is verified using a 120mm path length. Note: Thallium salts are considered toxic and should be handled with care.

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

Application area：Deep infrared spectral analysis 、Ultraviolet laser transmission 、X-ray detection 、Infrared optics 、Epitaxial substrates

Unit Price

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Part Number

MP-KRS5-25-2-W

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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
Rest strahlen Peak :	n/ a
dn/ dT :	-235 x 10^-6 / °C
dn/ d μ= 0 :	7 μm
Density:	7 . 371 g/ cc (3 )
Melting point:	414 . 5 °C (3 )
Thermal conductivity:	0 . 544 Wm^-1 K^-1 at 293K
Thermal expansion:	58 x 10^-6 / °C (2 )
Hardness:	Knoop 40 . 2 (2 )
Specific heat capacity:	200 J Kg^-1 K^-1at 273K
Dielectric constant:	32 . 5
Youngs Modulus (E) :	15 . 85 GPa (2 )
Shear modulus (G):	5 . 79 GPa (2 )
Bulk modulus (K):	19 . 78 GPa (2 )
Elastic modulus:	C_{1 1} =33 1 ; 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%Tl Br ; 58 mole%TlI
Category/structure:	Cubic , CsCl structure , Pm3m, No cleavage (3 )

Note 1: Warning: Thallium salts are toxic, so be careful when handling them.

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
1 1 . 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 . 2753 1	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 factory PN# example

Order PN#	Specific (D x L)(mm)	Diameter (D)	Thickness (L)	S/D	Material
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 Punching	+0.2/-0.0mm	±0.1mm	60/40	IR
KRS5P32-3	32.0mm×3.0mm Unpunched	+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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