K-FK5 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.487489 n_e = 1.489143	V_d = 70.41 V_e = 70.22	n_F - n_C = 0.006923 n_F' - n_C' = 0.006965	Coloring: 0.26 - 0.29 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.1889681 C2 = -0.009646703 C3 = 0.0088503901 C4 = 0.00018716795 C5 = -0.000010785912 C6 = 0.00000061564212

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.479129
n _s	1.481378
n _r	1.484101
n _C	1.485346
n _C'	1.485691
n _0.6328	1.486011
n _D	1.487427
n _d	1.487489
n _e	1.489143
n _F	1.492270
n _F'	1.492656
n _g	1.495932
n _h	1.498938
n _i	1.504010
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8978
P_C,A'	0.3645
P_d,C	0.3095
P_e,C	0.5483
P_g,d	1.2194
P_g,F	0.5290
P_h,g	0.4341
P_i,g	1.1666
P_C',t	0.9476
P_e,C'	0.4986
P_F',e	0.5074
P_i,F'	1.6398

transmittance: 10 mm
τ_0.27	0.324
τ_0.28	0.625
τ_0.29	0.833
τ_0.3	0.929
τ_0.31	0.968
τ_0.32	0.977
τ_0.33	0.982
τ_0.34	0.985
τ_0.35	0.988
τ_0.36	0.99
τ_0.37	0.99
τ_0.38	0.99
τ_0.39	0.99
τ_0.4	0.99
τ_0.42	0.991
τ_0.44	0.991
τ_0.46	0.991
τ_0.48	0.991
τ_0.5	0.991
τ_0.55	0.994
τ_0.6	0.995
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.978
τ₂	0.968

transmittance: 25 mm
τ_0.27	0.06
τ_0.28	0.309
τ_0.29	0.633
τ_0.3	0.832
τ_0.31	0.923
τ_0.32	0.944
τ_0.33	0.957
τ_0.34	0.964
τ_0.35	0.971
τ_0.36	0.975
τ_0.37	0.975
τ_0.38	0.975
τ_0.39	0.975
τ_0.4	0.975
τ_0.42	0.978
τ_0.44	0.978
τ_0.46	0.978
τ_0.48	0.978
τ_0.5	0.978
τ_0.55	0.985
τ_0.6	0.989
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.947
τ₂	0.923

Poisson coef.: 0.241
Rigidity: 244 Pa*10⁸
Young module: 605 Pa*10⁸
Knoop hardness: 531
Abrasion: 110

Climatic resistance: 2
Resistance to acids: 5

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	98