N-PK52 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.497004 n_e = 1.498458	V_d = 81.63 V_e = 81.22	n_F - n_C = 0.006088 n_F' - n_C' = 0.006136	Coloring: 0.34 - 0.29 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.00814481 C2 = 0.209435366 C3 = 0.781686424 C4 = 0.00501967769 C5 = 0.0162476809 C6 = 152.389306

Refraction index
n _2.3254	1.479996
n _1.9701	1.483016
n _1.5296	1.486278
n _1.06	1.489755
n _t	1.490160
n _s	1.491861
n _r	1.494087
n _C	1.495146
n _C'	1.495442
n _0.6328	1.495719
n _D	1.496950
n _d	1.497004
n _e	1.498458
n _F	1.501234
n _F'	1.501579
n _g	1.504512
n _h	1.507213
n _i	1.511771
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8189
P_C,A'	0.3486
P_d,C	0.3052
P_e,C	0.5439
P_g,d	1.2331
P_g,F	0.5383
P_h,g	0.4435
P_i,g	1.1921
P_C',t	0.8675
P_e,C'	0.4953
P_F',e	0.5126
P_i,F'	1.6739

transmittance: 10 mm
τ_2.5	0.98
τ_2.3254	0.985
τ_1.9701	0.993
τ_1.5296	0.996
τ_1.06	0.997
τ_0.7	0.996
τ_0.66	0.996
τ_0.62	0.996
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	0.994
τ_0.4	0.994
τ_0.39	0.994
τ_0.38	0.992
τ_0.37	0.985
τ_0.365	0.98
τ_0.35	0.93
τ_0.3341	0.8
τ_0.32	0.55
τ_0.31	0.32
τ_0.3	0.16

transmittance: 25 mm
τ_2.5	0.95
τ_2.3254	0.964
τ_1.9701	0.982
τ_1.5296	0.991
τ_1.06	0.993
τ_0.7	0.991
τ_0.66	0.989
τ_0.62	0.99
τ_0.58	0.992
τ_0.54607	0.993
τ_0.5	0.991
τ_0.46	0.987
τ_0.4358	0.985
τ_0.42	0.985
τ_0.4047	0.986
τ_0.4	0.986
τ_0.39	0.985
τ_0.38	0.98
τ_0.37	0.962
τ_0.365	0.95
τ_0.35	0.84
τ_0.3341	0.57
τ_0.32	0.22
τ_0.31	0.06
τ_0.3	0.01

Density: 3.77 g/cm³
Poisson coef.: 0.3
Young module: 710 Pa*10⁸
Knoop hardness: 370
Optical stress coef.: 0.62 1/Pa*10¹²
Abrasion: 6

Climatic resistance: 1
Staining: 0
Resistance to acids: 52.3
Resistance to alkalis: 3.3
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	138
20 ~ 300	156

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-8
20 ~ 40		-8.5
60 ~ 80		-8.7
-40 ~ -20	e	-7.8
20 ~ 40	e	-8.2
60 ~ 80	e	-8.4
-40 ~ -20	g	-7.6
20 ~ 40	g	-7.9
60 ~ 80	g	-8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-6
20 ~ 40		-7.2
60 ~ 80		-7.7
-40 ~ -20	e	-5.8
20 ~ 40	e	-6.9
60 ~ 80	e	-7.3
-40 ~ -20	g	-5.5
20 ~ 40	g	-6.6
60 ~ 80	g	-7