E-SF8 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.688931 n_e = 1.694168	V_d = 31.07 V_e = 30.82	n_F - n_C = 0.022172 n_F' - n_C' = 0.022517	Coloring: 0.391 - 0.362 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.76155381 C2 = -0.0116348386 C3 = 0.0286355735 C4 = 0.00155293137 C5 = -0.0000794510589 C6 = 0.0000128609539

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.678961
n _C	1.682492
n _C'	1.683498
n _0.6328	1.684444
n _D	1.688738
n _d	1.688931
n _e	1.694168
n _F	1.704665
n _F'	1.706015
n _g	1.717970
n _h	1.729808
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'	0.3141
P_d,C	0.2903
P_e,C	0.5266
P_g,d	1.3096
P_g,F	0.6000
P_h,g	0.5338
P_i,g	-----
P_C',t	-----
P_e,C'	0.4812
P_F',e	0.5342
P_i,F'	-----

transmittance: 10 mm
τ_0.36	0.01
τ_0.37	0.2
τ_0.38	0.58
τ_0.39	0.81
τ_0.4	0.915
τ_0.42	0.985
τ_0.44	0.999
τ_0.46	0.999
τ_0.48	0.999
τ_0.5	0.999
τ_0.55	0.999
τ_0.6	0.999
τ_0.65	0.999
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	0.999
τ_1.6	0.999
τ_1.8	0.991
τ₂	0.979
τ_2.2	0.911
τ_2.4	0.86

Poisson coef.: 0.244
Rigidity: 35.5 Pa*10⁸
Young module: 88.2 Pa*10⁸
Knoop hardness: 566
Abrasion: 164

Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	91