E-SK4 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.612716 n_e = 1.615203	V_d = 58.73 V_e = 58.45	n_F - n_C = 0.010432 n_F' - n_C' = 0.010524	Coloring: 0.345 - 0.310 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.55935739 C2 = -0.0101666557 C3 = 0.01458787 C4 = 0.00036544107 C5 = -0.0000159151229 C6 = 0.00000099861439

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.607750
n _C	1.609549
n _C'	1.610052
n _0.6328	1.610523
n _D	1.612623
n _d	1.612716
n _e	1.615203
n _F	1.619981
n _F'	1.620577
n _g	1.625668
n _h	1.630390
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'	0.3455
P_d,C	0.3035
P_e,C	0.5419
P_g,d	1.2415
P_g,F	0.5451
P_h,g	0.4526
P_i,g	-----
P_C',t	-----
P_e,C'	0.4936
P_F',e	0.5151
P_i,F'	-----

transmittance: 10 mm
τ_0.29	0.01
τ_0.3	0.07
τ_0.31	0.2
τ_0.32	0.35
τ_0.33	0.53
τ_0.34	0.72
τ_0.35	0.86
τ_0.36	0.94
τ_0.37	0.983
τ_0.38	0.999
τ_0.39	0.999
τ_0.4	0.999
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	0.999
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	0.989
τ_2.2	0.944
τ_2.4	0.848

Knoop hardness: 598
Abrasion: 144

Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	72