N-SSK2 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.622293 n_e = 1.625075	V_d = 53.27 V_e = 52.99	n_F - n_C = 0.011681 n_F' - n_C' = 0.011795	Coloring: 0.37 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.4306027 C2 = 0.153150554 C3 = 1.01390904 C4 = 0.00823982975 C5 = 0.0333736841 C6 = 106.870822

Refraction index
n _2.3254	1.591493
n _1.9701	1.596845
n _1.5296	1.602601
n _1.06	1.608799
n _t	1.609534
n _s	1.612642
n _r	1.616780
n _C	1.618770
n _C'	1.619329
n _0.6328	1.619852
n _D	1.622190
n _d	1.622293
n _e	1.625075
n _F	1.630451
n _F'	1.631124
n _g	1.636906
n _h	1.642316
n _i	1.651658
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7907
P_C,A'	0.3403
P_d,C	0.3016
P_e,C	0.5397
P_g,d	1.2509
P_g,F	0.5525
P_h,g	0.4631
P_i,g	1.2629
P_C',t	0.8385
P_e,C'	0.4919
P_F',e	0.5178
P_i,F'	1.7578

transmittance: 10 mm
τ_2.5	0.76
τ_2.3254	0.88
τ_1.9701	0.971
τ_1.5296	0.992
τ_1.06	0.997
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.997
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.997
τ_0.46	0.994
τ_0.4358	0.992
τ_0.42	0.99
τ_0.4047	0.985
τ_0.4	0.981
τ_0.39	0.967
τ_0.38	0.94
τ_0.37	0.89
τ_0.365	0.85
τ_0.35	0.57

transmittance: 25 mm
τ_2.5	0.5
τ_2.3254	0.72
τ_1.9701	0.93
τ_1.5296	0.981
τ_1.06	0.992
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.993
τ_0.58	0.995
τ_0.54607	0.995
τ_0.5	0.992
τ_0.46	0.985
τ_0.4358	0.98
τ_0.42	0.975
τ_0.4047	0.963
τ_0.4	0.954
τ_0.39	0.92
τ_0.38	0.86
τ_0.37	0.75
τ_0.365	0.67
τ_0.35	0.25

Density: 3.53 g/cm³
Poisson coef.: 0.261
Young module: 820 Pa*10⁸
Knoop hardness: 570
Optical stress coef.: 2.51 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 1
Staining: 0
Resistance to acids: 1.2
Resistance to alkalis: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	58
20 ~ 300	67

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.1
20 ~ 40		2.9
60 ~ 80		3.5
-40 ~ -20	e	2.8
20 ~ 40	e	3.8
60 ~ 80	e	4.4
-40 ~ -20	g	3.5
20 ~ 40	g	4.6
60 ~ 80	g	5.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.2
20 ~ 40		4.3
60 ~ 80		4.5
-40 ~ -20	e	5
20 ~ 40	e	5.2
60 ~ 80	e	5.5
-40 ~ -20	g	5.8
20 ~ 40	g	6.1
60 ~ 80	g	6.4