SF8 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.688930 n_e = 1.694159	V_d = 31.14 V_e = 30.91	n_F - n_C = 0.022120 n_F' - n_C' = 0.022454	Coloring: 0.361 - 0.335 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.79885778 C2 = -0.0371809306 C3 = 0.00763019059 C4 = 0.00723169098 C5 = -0.000807384722 C6 = 0.0000469666667

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.678949
n _C	1.682499
n _C'	1.683505
n _0.6328	1.684451
n _D	1.688737
n _d	1.688930
n _e	1.694159
n _F	1.704619
n _F'	1.705959
n _g	1.717749
n _h	1.729309
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'	0.3195
P_d,C	0.2907
P_e,C	0.5271
P_g,d	1.3028
P_g,F	0.5935
P_h,g	0.5225
P_i,g	-----
P_C',t	-----
P_e,C'	0.4816
P_F',e	0.5334
P_i,F'	-----

transmittance: 10 mm
τ_0.34	0.11
τ_0.35	0.51
τ_0.36	0.79
τ_0.37	0.908
τ_0.38	0.955
τ_0.39	0.98
τ_0.4	0.993
τ_0.42	0.999
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	0.998
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	0.995
τ₂	0.992
τ_2.2	0.97
τ_2.4	0.962

Knoop hardness: 387
Abrasion: 185

Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	93