N-SSK5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.658440 n_e = 1.661519	V_d = 50.88 V_e = 50.59	n_F - n_C = 0.012940 n_F' - n_C' = 0.013075	Coloring: 0.38 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.59222659 C2 = 0.103520774 C3 = 1.05174016 C4 = 0.00920284626 C5 = 0.0423530072 C6 = 106.927374

Refraction index
n _2.3254	1.625809
n _1.9701	1.631275
n _1.5296	1.637197
n _1.06	1.643709
n _t	1.644495
n _s	1.647849
n _r	1.652367
n _C	1.654553
n _C'	1.655169
n _0.6328	1.655744
n _D	1.658325
n _d	1.658440
n _e	1.661519
n _F	1.667494
n _F'	1.668244
n _g	1.674708
n _h	1.680793
n _i	1.691394
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7773
P_C,A'	0.3369
P_d,C	0.3003
P_e,C	0.5382
P_g,d	1.2572
P_g,F	0.5575
P_h,g	0.4702
P_i,g	1.2894
P_C',t	0.8248
P_e,C'	0.4907
P_F',e	0.5196
P_i,F'	1.7890

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.85
τ_1.9701	0.963
τ_1.5296	0.992
τ_1.06	0.996
τ_0.7	0.997
τ_0.66	0.995
τ_0.62	0.995
τ_0.58	0.996
τ_0.54607	0.996
τ_0.5	0.993
τ_0.46	0.987
τ_0.4358	0.983
τ_0.42	0.978
τ_0.4047	0.967
τ_0.4	0.963
τ_0.39	0.95
τ_0.38	0.91
τ_0.37	0.84
τ_0.365	0.78
τ_0.35	0.43

transmittance: 25 mm
τ_2.5	0.45
τ_2.3254	0.66
τ_1.9701	0.91
τ_1.5296	0.98
τ_1.06	0.99
τ_0.7	0.992
τ_0.66	0.988
τ_0.62	0.987
τ_0.58	0.989
τ_0.54607	0.989
τ_0.5	0.982
τ_0.46	0.968
τ_0.4358	0.957
τ_0.42	0.95
τ_0.4047	0.92
τ_0.4	0.91
τ_0.39	0.87
τ_0.38	0.79
τ_0.37	0.64
τ_0.365	0.53
τ_0.35	0.12

Density: 3.71 g/cm³
Poisson coef.: 0.278
Young module: 880 Pa*10⁸
Knoop hardness: 590
Optical stress coef.: 1.9 1/Pa*10¹²
Abrasion: 5

Climatic resistance: 2
Staining: 3
Resistance to acids: 52.2
Resistance to alkalis: 2.2
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	68
20 ~ 300	80

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0
20 ~ 40		0.8
60 ~ 80		1.2
-40 ~ -20	e	0.8
20 ~ 40	e	1.8
60 ~ 80	e	2.3
-40 ~ -20	g	1.6
20 ~ 40	g	2.7
60 ~ 80	g	3.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.2
20 ~ 40		2.2
60 ~ 80		2.4
-40 ~ -20	e	3
20 ~ 40	e	3.2
60 ~ 80	e	3.5
-40 ~ -20	g	3.9
20 ~ 40	g	4.2
60 ~ 80	g	4.5