N-K5 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.522488 n_e = 1.524583	V_d = 59.48 V_e = 59.21	n_F - n_C = 0.008783 n_F' - n_C' = 0.008858	Coloring: 0.33 - 0.29 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.08511833 C2 = 0.199562005 C3 = 0.930511663 C4 = 0.00661099503 C5 = 0.024110866 C6 = 111.982777

Refraction index
n _2.3254	1.496559
n _1.9701	1.501455
n _1.5296	1.506644
n _1.06	1.511968
n _t	1.512571
n _s	1.515068
n _r	1.518290
n _C	1.519815
n _C'	1.520240
n _0.6328	1.520638
n _D	1.522410
n _d	1.522488
n _e	1.524583
n _F	1.528598
n _F'	1.529099
n _g	1.533375
n _h	1.537344
n _i	1.544123
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8246
P_C,A'	0.3483
P_d,C	0.3043
P_e,C	0.5428
P_g,d	1.2394
P_g,F	0.5437
P_h,g	0.4518
P_i,g	1.2236
P_C',t	0.8731
P_e,C'	0.4943
P_F',e	0.5141
P_i,F'	1.7104

transmittance: 10 mm
τ_2.5	0.76
τ_2.3254	0.83
τ_1.9701	0.94
τ_1.5296	0.994
τ_1.06	0.999
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.998
τ_0.46	0.997
τ_0.4358	0.997
τ_0.42	0.996
τ_0.4047	0.996
τ_0.4	0.995
τ_0.39	0.994
τ_0.38	0.992
τ_0.37	0.992
τ_0.365	0.99
τ_0.35	0.971
τ_0.3341	0.88
τ_0.32	0.61
τ_0.31	0.32

transmittance: 25 mm
τ_2.5	0.5
τ_2.3254	0.62
τ_1.9701	0.85
τ_1.5296	0.986
τ_1.06	0.998
τ_0.7	0.996
τ_0.66	0.994
τ_0.62	0.994
τ_0.58	0.996
τ_0.54607	0.996
τ_0.5	0.995
τ_0.46	0.993
τ_0.4358	0.992
τ_0.42	0.991
τ_0.4047	0.989
τ_0.4	0.987
τ_0.39	0.984
τ_0.38	0.98
τ_0.37	0.979
τ_0.365	0.974
τ_0.35	0.93
τ_0.3341	0.73
τ_0.32	0.29
τ_0.31	0.06

Density: 2.59 g/cm³
Poisson coef.: 0.224
Young module: 710 Pa*10⁸
Knoop hardness: 530
Optical stress coef.: 3.03 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	82
20 ~ 300	96

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.6
20 ~ 40		0.1
60 ~ 80		0.4
-40 ~ -20	e	0
20 ~ 40	e	0.7
60 ~ 80	e	1.1
-40 ~ -20	g	0.5
20 ~ 40	g	1.4
60 ~ 80	g	1.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.5
20 ~ 40		1.4
60 ~ 80		1.4
-40 ~ -20	e	2.1
20 ~ 40	e	2.1
60 ~ 80	e	2.1
-40 ~ -20	g	2.6
20 ~ 40	g	2.7
60 ~ 80	g	2.8