K-GFK70 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

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Main parameters
n_d = 1.569074 n_e = 1.570978	V_d = 71.31 V_e = 70.89	n_F - n_C = 0.007979 n_F' - n_C' = 0.008053	Coloring: 0.28 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4305666 C2 = -0.0063501751 C3 = 0.010708199 C4 = 0.00037642062 C5 = -0.00002605904 C6 = 0.0000011027285

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.560379
n _s	1.562483
n _r	1.565301
n _C	1.566661
n _C'	1.567044
n _0.6328	1.567402
n _D	1.569003
n _d	1.569074
n _e	1.570978
n _F	1.574641
n _F'	1.575098
n _g	1.578990
n _h	1.582579
n _i	1.588640
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7872
P_C,A'	0.3402
P_d,C	0.3023
P_e,C	0.5409
P_g,d	1.2426
P_g,F	0.5449
P_h,g	0.4498
P_i,g	1.2092
P_C',t	0.8351
P_e,C'	0.4929
P_F',e	0.5162
P_i,F'	1.6970

transmittance: 10 mm
τ_0.28	0.029
τ_0.29	0.1
τ_0.3	0.225
τ_0.31	0.358
τ_0.32	0.625
τ_0.33	0.782
τ_0.34	0.882
τ_0.35	0.94
τ_0.36	0.968
τ_0.37	0.981
τ_0.38	0.988
τ_0.39	0.99
τ_0.4	0.992
τ_0.42	0.992
τ_0.44	0.992
τ_0.46	0.992
τ_0.48	0.992
τ_0.5	0.994
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.998

transmittance: 25 mm
τ_0.3	0.024
τ_0.31	0.077
τ_0.32	0.309
τ_0.33	0.541
τ_0.34	0.73
τ_0.35	0.857
τ_0.36	0.923
τ_0.37	0.954
τ_0.38	0.971
τ_0.39	0.975
τ_0.4	0.982
τ_0.42	0.982
τ_0.44	0.982
τ_0.46	0.982
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.996

Poisson coef.: 0.295
Rigidity: 256 Pa*10⁸
Young module: 663 Pa*10⁸
Knoop hardness: 332
Abrasion: 620

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	156