N-PK51 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.528554 n_e = 1.530193	V_d = 76.97 V_e = 76.58	n_F - n_C = 0.006866 n_F' - n_C' = 0.006923	Coloring: 0.35 - 0.29 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.15610775 C2 = 0.153229344 C3 = 0.785618966 C4 = 0.00585597402 C5 = 0.0194072416 C6 = 140.537046

Refraction index
n _2.3254	1.509868
n _1.9701	1.513122
n _1.5296	1.516647
n _1.06	1.520445
n _t	1.520893
n _s	1.522781
n _r	1.525273
n _C	1.526462
n _C'	1.526795
n _0.6328	1.527106
n _D	1.528493
n _d	1.528554
n _e	1.530193
n _F	1.533329
n _F'	1.533718
n _g	1.537037
n _h	1.540098
n _i	1.545272
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8110
P_C,A'	0.3468
P_d,C	0.3046
P_e,C	0.5433
P_g,d	1.2355
P_g,F	0.5401
P_h,g	0.4456
P_i,g	1.1991
P_C',t	0.8595
P_e,C'	0.4948
P_F',e	0.5134
P_i,F'	1.6825

transmittance: 10 mm
τ_2.5	0.954
τ_2.3254	0.967
τ_1.9701	0.986
τ_1.5296	0.994
τ_1.06	0.996
τ_0.7	0.996
τ_0.66	0.996
τ_0.62	0.996
τ_0.58	0.997
τ_0.54607	0.998
τ_0.5	0.997
τ_0.46	0.996
τ_0.4358	0.994
τ_0.42	0.994
τ_0.4047	0.993
τ_0.4	0.992
τ_0.39	0.989
τ_0.38	0.984
τ_0.37	0.971
τ_0.365	0.959
τ_0.35	0.88
τ_0.3341	0.7
τ_0.32	0.43
τ_0.31	0.25

transmittance: 25 mm
τ_2.5	0.89
τ_2.3254	0.92
τ_1.9701	0.965
τ_1.5296	0.985
τ_1.06	0.99
τ_0.7	0.99
τ_0.66	0.99
τ_0.62	0.991
τ_0.58	0.993
τ_0.54607	0.994
τ_0.5	0.992
τ_0.46	0.989
τ_0.4358	0.986
τ_0.42	0.985
τ_0.4047	0.982
τ_0.4	0.98
τ_0.39	0.972
τ_0.38	0.96
τ_0.37	0.93
τ_0.365	0.9
τ_0.35	0.72
τ_0.3341	0.41
τ_0.32	0.12
τ_0.31	0.03

Density: 3.96 g/cm³
Poisson coef.: 0.295
Young module: 740 Pa*10⁸
Knoop hardness: 400
Optical stress coef.: 0.54 1/Pa*10¹²
Abrasion: 6

Climatic resistance: 2
Staining: 0
Resistance to acids: 51.2
Resistance to alkalis: 3.3
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	127
20 ~ 300	144

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-8.1
20 ~ 40		-8.4
60 ~ 80		-8.6
-40 ~ -20	e	-7.8
20 ~ 40	e	-8.1
60 ~ 80	e	-8.2
-40 ~ -20	g	-7.5
20 ~ 40	g	-7.7
60 ~ 80	g	-7.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-6
20 ~ 40		-7.1
60 ~ 80		-7.5
-40 ~ -20	e	-5.7
20 ~ 40	e	-6.7
60 ~ 80	e	-7.1
-40 ~ -20	g	-5.4
20 ~ 40	g	-6.4
60 ~ 80	g	-6.7