SF57 - Schott 2000

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.846662 n_e = 1.855035	V_d = 23.82 V_e = 23.64	n_F - n_C = 0.035535 n_F' - n_C' = 0.036166	Coloring: 0.44 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.3254 mkm.
C1 = 1.81651371 C2 = 0.428893641 C3 = 1.07186278 C4 = 0.0143704198 C5 = 0.0592801172 C6 = 121.419942

Refraction index
n _2.3254	1.790262
n _1.9701	1.795387
n _1.5296	1.801866
n _1.06	1.811854
n _t	1.813351
n _s	1.820375
n _r	1.831017
n _C	1.836504
n _C'	1.838079
n _0.6328	1.839565
n _D	1.846356
n _d	1.846662
n _e	1.855035
n _F	1.872040
n _F'	1.874245
n _g	1.893930
n _h	1.913659
n _i	1.951313
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6515
P_C,A'	0.3022
P_d,C	0.2858
P_e,C	0.5214
P_g,d	1.3301
P_g,F	0.6159
P_h,g	0.5551
P_i,g	1.6148
P_C',t	0.6958
P_e,C'	0.4771
P_F',e	0.5405
P_i,F'	2.1687

transmittance: 10 mm
τ_2.3254	0.93
τ_1.9701	0.984
τ_1.5296	0.999
τ_1.06	0.999
τ_0.7	0.999
τ_0.66	0.999
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.5	0.994
τ_0.46	0.985
τ_0.4358	0.967
τ_0.42	0.94
τ_0.4047	0.87
τ_0.4	0.84
τ_0.39	0.73
τ_0.38	0.59
τ_0.37	0.25

transmittance: 25 mm
τ_2.3254	0.84
τ_1.9701	0.96
τ_1.5296	0.998
τ_1.06	0.998
τ_0.7	0.998
τ_0.66	0.998
τ_0.62	0.996
τ_0.58	0.996
τ_0.54607	0.994
τ_0.5	0.985
τ_0.46	0.962
τ_0.4358	0.92
τ_0.42	0.85
τ_0.4047	0.7
τ_0.4	0.64
τ_0.39	0.45
τ_0.38	0.27
τ_0.37	0.03

Density: 5.51 g/cm³
Poisson coef.: 0.248
Young module: 540 Pa*10⁸
Knoop hardness: 350
Optical stress coef.: 0.02 1/Pa*10¹²
Abrasion: 1

Climatic resistance: 2
Staining: 5
Resistance to acids: 52.3
Resistance to alkalis: 2.3
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	83
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.2
20 ~ 40		6
60 ~ 80		6.8
-40 ~ -20	e	8.6
20 ~ 40	e	10.9
60 ~ 80	e	12.1
-40 ~ -20	g	14.1
20 ~ 40	g	17.2
60 ~ 80	g	18.8

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		6.6
20 ~ 40		7.6
60 ~ 80		8
-40 ~ -20	e	11.1
20 ~ 40	e	12.5
60 ~ 80	e	13.4
-40 ~ -20	g	16.7
20 ~ 40	g	18.9
60 ~ 80	g	20.1