N-PSK3 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.552321 n_e = 1.554398	V_d = 63.45 V_e = 63.23	n_F - n_C = 0.008703 n_F' - n_C' = 0.008767	Coloring: 0.33 - 0.28 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 0.88727211 C2 = 0.489592425 C3 = 1.04865296 C4 = 0.00469824067 C5 = 0.0161818463 C6 = 104.374975

Refraction index
n _2.3254	1.523748
n _1.9701	1.529538
n _1.5296	1.535582
n _1.06	1.541535
n _t	1.542184
n _s	1.544816
n _r	1.548114
n _C	1.549650
n _C'	1.550078
n _0.6328	1.550476
n _D	1.552244
n _d	1.552321
n _e	1.554398
n _F	1.558354
n _F'	1.558845
n _g	1.563024
n _h	1.566880
n _i	1.573416
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8577
P_C,A'	0.3559
P_d,C	0.3068
P_e,C	0.5454
P_g,d	1.2296
P_g,F	0.5365
P_h,g	0.4429
P_i,g	1.1938
P_C',t	0.9068
P_e,C'	0.4963
P_F',e	0.5108
P_i,F'	1.6739

transmittance: 10 mm
τ_2.5	0.65
τ_2.3254	0.81
τ_1.9701	0.95
τ_1.5296	0.991
τ_1.06	0.999
τ_0.7	0.998
τ_0.66	0.997
τ_0.62	0.997
τ_0.58	0.997
τ_0.54607	0.997
τ_0.5	0.996
τ_0.46	0.995
τ_0.4358	0.994
τ_0.42	0.994
τ_0.4047	0.995
τ_0.4	0.994
τ_0.39	0.993
τ_0.38	0.991
τ_0.37	0.988
τ_0.365	0.985
τ_0.35	0.967
τ_0.3341	0.91
τ_0.32	0.77
τ_0.31	0.58
τ_0.3	0.32

transmittance: 25 mm
τ_2.5	0.34
τ_2.3254	0.59
τ_1.9701	0.88
τ_1.5296	0.978
τ_1.06	0.997
τ_0.7	0.995
τ_0.66	0.993
τ_0.62	0.992
τ_0.58	0.993
τ_0.54607	0.993
τ_0.5	0.99
τ_0.46	0.987
τ_0.4358	0.986
τ_0.42	0.986
τ_0.4047	0.987
τ_0.4	0.986
τ_0.39	0.983
τ_0.38	0.977
τ_0.37	0.971
τ_0.365	0.964
τ_0.35	0.92
τ_0.3341	0.8
τ_0.32	0.52
τ_0.31	0.26
τ_0.3	0.06

Density: 2.91 g/cm³
Poisson coef.: 0.226
Young module: 840 Pa*10⁸
Knoop hardness: 630
Optical stress coef.: 2.48 1/Pa*10¹²
Abrasion: 2

Climatic resistance: 3
Staining: 0
Resistance to acids: 2.2
Resistance to alkalis: 2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	62
20 ~ 300	73

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.6
20 ~ 40		1.2
60 ~ 80		1.7
-40 ~ -20	e	1
20 ~ 40	e	1.6
60 ~ 80	e	2.2
-40 ~ -20	g	1.5
20 ~ 40	g	2.1
60 ~ 80	g	2.7

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.6
20 ~ 40		2.5
60 ~ 80		2.7
-40 ~ -20	e	3.1
20 ~ 40	e	3
60 ~ 80	e	3.2
-40 ~ -20	g	3.6
20 ~ 40	g	3.5
60 ~ 80	g	3.8