N-PSK53 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.620141 n_e = 1.622471	V_d = 63.48 V_e = 63.18	n_F - n_C = 0.009769 n_F' - n_C' = 0.009851	Coloring: 0.37 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.3434087 C2 = 0.241417935 C3 = 0.952896897 C4 = 0.00675074317 C5 = 0.0219910513 C6 = 103.551457

Refraction index
n _2.3254	1.592165
n _1.9701	1.597321
n _1.5296	1.602802
n _1.06	1.608512
n _t	1.609169
n _s	1.611907
n _r	1.615473
n _C	1.617166
n _C'	1.617640
n _0.6328	1.618082
n _D	1.620054
n _d	1.620141
n _e	1.622471
n _F	1.626935
n _F'	1.627491
n _g	1.632233
n _h	1.636623
n _i	1.644087
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8186
P_C,A'	0.3476
P_d,C	0.3044
P_e,C	0.5429
P_g,d	1.2378
P_g,F	0.5423
P_h,g	0.4493
P_i,g	1.2133
P_C',t	0.8671
P_e,C'	0.4945
P_F',e	0.5138
P_i,F'	1.6988

transmittance: 10 mm
τ_2.5	0.73
τ_2.3254	0.84
τ_1.9701	0.95
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.99
τ_0.66	0.989
τ_0.62	0.989
τ_0.58	0.991
τ_0.54607	0.991
τ_0.5	0.987
τ_0.46	0.981
τ_0.4358	0.978
τ_0.42	0.977
τ_0.4047	0.974
τ_0.4	0.971
τ_0.39	0.963
τ_0.38	0.94
τ_0.37	0.9
τ_0.365	0.87
τ_0.35	0.66
τ_0.3341	0.19

transmittance: 25 mm
τ_2.5	0.45
τ_2.3254	0.65
τ_1.9701	0.88
τ_1.5296	0.975
τ_1.06	0.996
τ_0.7	0.976
τ_0.66	0.972
τ_0.62	0.972
τ_0.58	0.977
τ_0.54607	0.978
τ_0.5	0.968
τ_0.46	0.953
τ_0.4358	0.95
τ_0.42	0.94
τ_0.4047	0.94
τ_0.4	0.93
τ_0.39	0.91
τ_0.38	0.86
τ_0.37	0.77
τ_0.365	0.71
τ_0.35	0.35
τ_0.3341	0.02

Density: 3.6 g/cm³
Poisson coef.: 0.288
Young module: 780 Pa*10⁸
Knoop hardness: 440
Optical stress coef.: 1.16 1/Pa*10¹²
Abrasion: 6

Climatic resistance: 2
Staining: 1
Resistance to acids: 52.3
Resistance to alkalis: 1.2
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	94
20 ~ 300	109

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-4.7
20 ~ 40		-4.3
60 ~ 80		-4.1
-40 ~ -20	e	-4.2
20 ~ 40	e	-3.8
60 ~ 80	e	-3.4
-40 ~ -20	g	-3.8
20 ~ 40	g	-3.2
60 ~ 80	g	-2.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-2.5
20 ~ 40		-2.9
60 ~ 80		-3
-40 ~ -20	e	-2
20 ~ 40	e	-2.3
60 ~ 80	e	-2.3
-40 ~ -20	g	-1.5
20 ~ 40	g	-1.8
60 ~ 80	g	-1.7