E-BK7 - Hikari

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.516799 n_e = 1.518723	V_d = 64.10 V_e = 63.89	n_F - n_C = 0.008061 n_F' - n_C' = 0.008118	Coloring: 0.321 - 0.286 mkm.

Type: Schott
Spectral range: 0.4046561 - 0.76819 mkm.
C1 = 2.271192 C2 = -0.00966126763 C3 = 0.0110306969 C4 = 0.0000700379964 C5 = 0.0000139658544 C6 = -0.000000762560454

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	-----
n _s	-----
n _r	1.512894
n _C	1.514322
n _C'	1.514719
n _0.6328	1.515088
n _D	1.516727
n _d	1.516799
n _e	1.518723
n _F	1.522383
n _F'	1.522837
n _g	1.526702
n _h	1.530263
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'	0.3577
P_d,C	0.3073
P_e,C	0.5459
P_g,d	1.2284
P_g,F	0.5357
P_h,g	0.4417
P_i,g	-----
P_C',t	-----
P_e,C'	0.4966
P_F',e	0.5104
P_i,F'	-----

transmittance: 10 mm
τ_0.28	0.01
τ_0.29	0.08
τ_0.3	0.3
τ_0.31	0.58
τ_0.32	0.78
τ_0.33	0.89
τ_0.34	0.952
τ_0.35	0.979
τ_0.36	0.993
τ_0.37	0.998
τ_0.38	0.998
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	0.989
τ_1.6	0.996
τ_1.8	0.969
τ₂	0.932
τ_2.2	0.83
τ_2.4	0.77

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	92