E-SF4 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.755199 n_e = 1.761672	V_d = 27.51 V_e = 27.28	n_F - n_C = 0.027451 n_F' - n_C' = 0.027912	Coloring: 0.398 - 0.368 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.96469762 C2 = -0.0128650713 C3 = 0.0357299793 C4 = 0.00216572877 C5 = -0.000102243404 C6 = 0.0000182439835

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.742991
n _C	1.747295
n _C'	1.748525
n _0.6328	1.749684
n _D	1.754961
n _d	1.755199
n _e	1.761672
n _F	1.774747
n _F'	1.776438
n _g	1.791500
n _h	1.806558
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'	0.3084
P_d,C	0.2879
P_e,C	0.5237
P_g,d	1.3223
P_g,F	0.6102
P_h,g	0.5485
P_i,g	-----
P_C',t	-----
P_e,C'	0.4788
P_F',e	0.5378
P_i,F'	-----

transmittance: 10 mm
τ_0.37	0.09
τ_0.38	0.4
τ_0.39	0.67
τ_0.4	0.83
τ_0.42	0.951
τ_0.44	0.986
τ_0.46	0.997
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	0.999
τ₂	0.988
τ_2.2	0.955
τ_2.4	0.915

Poisson coef.: 0.258
Rigidity: 36.8 Pa*10⁸
Young module: 92.6 Pa*10⁸
Knoop hardness: 575
Abrasion: 200

Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	102