E-SF2 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.647689 n_e = 1.652218	V_d = 33.79 V_e = 33.54	n_F - n_C = 0.019162 n_F' - n_C' = 0.019445	Coloring: 0.385 - 0.360 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.63429594 C2 = -0.00920840209 C3 = 0.0274266023 C4 = 0.000225441472 C5 = 0.0000997644221 C6 = 0.0000000176259116

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.639009
n _C	1.642094
n _C'	1.642970
n _0.6328	1.643794
n _D	1.647522
n _d	1.647689
n _e	1.652218
n _F	1.661257
n _F'	1.662416
n _g	1.672648
n _h	1.682687
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	-----
P_C,A'	0.3184
P_d,C	0.2919
P_e,C	0.5282
P_g,d	1.3024
P_g,F	0.5944
P_h,g	0.5239
P_i,g	-----
P_C',t	-----
P_e,C'	0.4825
P_F',e	0.5322
P_i,F'	-----

transmittance: 10 mm
τ_0.36	0.03
τ_0.37	0.32
τ_0.38	0.67
τ_0.39	0.84
τ_0.4	0.92
τ_0.42	0.968
τ_0.44	0.98
τ_0.46	0.985
τ_0.48	0.988
τ_0.5	0.992
τ_0.55	0.997
τ_0.6	0.998
τ_0.65	0.996
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.999
τ_1.2	0.999
τ_1.4	0.994
τ_1.6	0.998
τ_1.8	0.986
τ₂	0.975
τ_2.2	0.906
τ_2.4	0.88

Knoop hardness: 602
Abrasion: 126

Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	84