KF3 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

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Main parameters
n_d = 1.514537 n_e = 1.516781	V_d = 54.63 V_e = 54.35	n_F - n_C = 0.009418 n_F' - n_C' = 0.009507	Coloring: 0.30 - 0.32 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.2595072 C2 = -0.0087017925 C3 = 0.011691949 C4 = 0.00050751817 C5 = -0.000040895778 C6 = 0.0000026801217

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.504120
n _s	1.506704
n _r	1.510078
n _C	1.511690
n _C'	1.512142
n _0.6328	1.512565
n _D	1.514453
n _d	1.514537
n _e	1.516781
n _F	1.521109
n _F'	1.521650
n _g	1.526290
n _h	1.530629
n _i	1.538150
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8037
P_C,A'	0.3425
P_d,C	0.3022
P_e,C	0.5405
P_g,d	1.2479
P_g,F	0.5501
P_h,g	0.4606
P_i,g	1.2591
P_C',t	0.8517
P_e,C'	0.4925
P_F',e	0.5169
P_i,F'	1.7518

transmittance: 10 mm
τ_0.3	0.122
τ_0.31	0.6
τ_0.32	0.839
τ_0.33	0.936
τ_0.34	0.967
τ_0.35	0.977
τ_0.36	0.982
τ_0.37	0.982
τ_0.38	0.985
τ_0.39	0.988
τ_0.4	0.988
τ_0.42	0.988
τ_0.44	0.988
τ_0.46	0.988
τ_0.48	0.99
τ_0.5	0.99
τ_0.55	0.991
τ_0.6	0.994
τ_0.65	0.994
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.994
τ_1.5	0.985
τ₂	0.929

transmittance: 25 mm
τ_0.31	0.279
τ_0.32	0.646
τ_0.33	0.848
τ_0.34	0.92
τ_0.35	0.944
τ_0.36	0.957
τ_0.37	0.957
τ_0.38	0.964
τ_0.39	0.971
τ_0.4	0.971
τ_0.42	0.971
τ_0.44	0.971
τ_0.46	0.971
τ_0.48	0.975
τ_0.5	0.975
τ_0.55	0.978
τ_0.6	0.985
τ_0.65	0.985
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.985
τ_1.5	0.964
τ₂	0.832

Poisson coef.: 0.218
Rigidity: 261 Pa*10⁸
Young module: 637 Pa*10⁸
Knoop hardness: 497
Abrasion: 120

Climatic resistance: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	107