LLF1 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.548140 n_e = 1.550986	V_d = 45.75 V_e = 45.46	n_F - n_C = 0.011981 n_F' - n_C' = 0.012118	Coloring: 0.33 - 0.31 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.21640125 C2 = 0.13366454 C3 = 0.883399468 C4 = 0.00857807248 C5 = 0.0420143003 C6 = 107.59306

Refraction index
n _2.3254	1.518649
n _1.9701	1.523536
n _1.5296	1.528839
n _1.06	1.534696
n _t	1.535405
n _s	1.538445
n _r	1.542563
n _C	1.544565
n _C'	1.545130
n _0.6328	1.545659
n _D	1.548034
n _d	1.548140
n _e	1.550986
n _F	1.556546
n _F'	1.557248
n _g	1.563327
n _h	1.569107
n _i	1.579315
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7645
P_C,A'	0.3327
P_d,C	0.2983
P_e,C	0.5359
P_g,d	1.2676
P_g,F	0.5659
P_h,g	0.4823
P_i,g	1.3343
P_C',t	0.8116
P_e,C'	0.4888
P_F',e	0.5226
P_i,F'	1.8418

transmittance: 10 mm
τ_2.5	0.76
τ_2.3254	0.82
τ_1.9701	0.93
τ_1.5296	0.996
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	0.997
τ_0.5	0.997
τ_0.46	0.997
τ_0.4358	0.997
τ_0.42	0.996
τ_0.4047	0.996
τ_0.4	0.996
τ_0.39	0.996
τ_0.38	0.995
τ_0.37	0.994
τ_0.365	0.992
τ_0.35	0.982
τ_0.3341	0.91
τ_0.32	0.6

transmittance: 25 mm
τ_2.5	0.5
τ_2.3254	0.61
τ_1.9701	0.84
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.996
τ_0.66	0.995
τ_0.62	0.995
τ_0.58	0.994
τ_0.54607	0.993
τ_0.5	0.993
τ_0.46	0.992
τ_0.4358	0.992
τ_0.42	0.991
τ_0.4047	0.991
τ_0.4	0.991
τ_0.39	0.99
τ_0.38	0.988
τ_0.37	0.984
τ_0.365	0.981
τ_0.35	0.955
τ_0.3341	0.8
τ_0.32	0.28

Density: 2.94 g/cm³
Poisson coef.: 0.208
Young module: 600 Pa*10⁸
Knoop hardness: 450
Optical stress coef.: 3.05 1/Pa*10¹²
Abrasion: 3

Climatic resistance: 1
Staining: 0
Resistance to acids: 1
Resistance to alkalis: 2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	81
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.6
20 ~ 40		0.6
60 ~ 80		1
-40 ~ -20	e	0.3
20 ~ 40	e	1.5
60 ~ 80	e	2
-40 ~ -20	g	1.3
20 ~ 40	g	2.5
60 ~ 80	g	3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.5
20 ~ 40		1.9
60 ~ 80		2
-40 ~ -20	e	2.4
20 ~ 40	e	2.9
60 ~ 80	e	3
-40 ~ -20	g	3.4
20 ~ 40	g	3.9
60 ~ 80	g	4.1