N-SSK8 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.617728 n_e = 1.620676	V_d = 49.82 V_e = 49.53	n_F - n_C = 0.012396 n_F' - n_C' = 0.012529	Coloring: 0.39 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.44857867 C2 = 0.117965926 C3 = 1.06937528 C4 = 0.00869310149 C5 = 0.0421566593 C6 = 111.300666

Refraction index
n _2.3254	1.585936
n _1.9701	1.591368
n _1.5296	1.597231
n _1.06	1.603599
n _t	1.604359
n _s	1.607590
n _r	1.611919
n _C	1.614010
n _C'	1.614598
n _0.6328	1.615149
n _D	1.617618
n _d	1.617728
n _e	1.620676
n _F	1.626407
n _F'	1.627128
n _g	1.633351
n _h	1.639232
n _i	1.649537
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7784
P_C,A'	0.3365
P_d,C	0.2998
P_e,C	0.5377
P_g,d	1.2602
P_g,F	0.5601
P_h,g	0.4743
P_i,g	1.3056
P_C',t	0.8259
P_e,C'	0.4902
P_F',e	0.5204
P_i,F'	1.8076

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.85
τ_1.9701	0.959
τ_1.5296	0.992
τ_1.06	0.997
τ_0.7	0.998
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.994
τ_0.46	0.987
τ_0.4358	0.982
τ_0.42	0.975
τ_0.4047	0.959
τ_0.4	0.95
τ_0.39	0.92
τ_0.38	0.85
τ_0.37	0.73
τ_0.365	0.63
τ_0.35	0.16

transmittance: 25 mm
τ_2.5	0.46
τ_2.3254	0.66
τ_1.9701	0.9
τ_1.5296	0.98
τ_1.06	0.993
τ_0.7	0.994
τ_0.66	0.991
τ_0.62	0.99
τ_0.58	0.992
τ_0.54607	0.992
τ_0.5	0.984
τ_0.46	0.969
τ_0.4358	0.955
τ_0.42	0.94
τ_0.4047	0.9
τ_0.4	0.88
τ_0.39	0.81
τ_0.38	0.66
τ_0.37	0.45
τ_0.365	0.31
τ_0.35	0.01

Density: 3.27 g/cm³
Poisson coef.: 0.251
Young module: 840 Pa*10⁸
Knoop hardness: 570
Optical stress coef.: 2.36 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 1.3
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
20 ~ 300	82

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.2
20 ~ 40		0.6
60 ~ 80		1.1
-40 ~ -20	e	0.5
20 ~ 40	e	1.5
60 ~ 80	e	2.1
-40 ~ -20	g	1.3
20 ~ 40	g	2.4
60 ~ 80	g	3.1

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.9
20 ~ 40		2
60 ~ 80		2.2
-40 ~ -20	e	2.7
20 ~ 40	e	2.9
60 ~ 80	e	3.2
-40 ~ -20	g	3.5
20 ~ 40	g	3.9
60 ~ 80	g	4.2