KF4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.533576 n_e = 1.536038	V_d = 51.57 V_e = 51.28	n_F - n_C = 0.010346 n_F' - n_C' = 0.010453	Coloring: 0.30 - 0.33 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3138571 C2 = -0.0091408348 C3 = 0.012749755 C4 = 0.0006097992 C5 = -0.000046036549 C6 = 0.0000032022402

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.522299
n _s	1.525066
n _r	1.528713
n _C	1.530466
n _C'	1.530958
n _0.6328	1.531419
n _D	1.533484
n _d	1.533576
n _e	1.536038
n _F	1.540812
n _F'	1.541411
n _g	1.546572
n _h	1.551429
n _i	1.559929
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7892
P_C,A'	0.3384
P_d,C	0.3005
P_e,C	0.5385
P_g,d	1.2560
P_g,F	0.5566
P_h,g	0.4695
P_i,g	1.2910
P_C',t	0.8369
P_e,C'	0.4909
P_F',e	0.5193
P_i,F'	1.7897

transmittance: 10 mm
τ_0.3	0.04
τ_0.31	0.35
τ_0.32	0.701
τ_0.33	0.878
τ_0.34	0.947
τ_0.35	0.978
τ_0.36	0.991
τ_0.37	0.995
τ_0.38	0.995
τ_0.39	0.995
τ_0.4	0.995
τ_0.42	0.995
τ_0.44	0.995
τ_0.46	0.995
τ_0.48	0.997
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.994
τ₂	0.936

transmittance: 25 mm
τ_0.31	0.072
τ_0.32	0.411
τ_0.33	0.722
τ_0.34	0.874
τ_0.35	0.947
τ_0.36	0.978
τ_0.37	0.989
τ_0.38	0.989
τ_0.39	0.989
τ_0.4	0.989
τ_0.42	0.989
τ_0.44	0.989
τ_0.46	0.989
τ_0.48	0.992
τ_0.5	0.992
τ_0.55	0.992
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.985
τ₂	0.848

Poisson coef.: 0.223
Rigidity: 264 Pa*10⁸
Young module: 645 Pa*10⁸
Knoop hardness: 429
Abrasion: 110

Climatic resistance: 2
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	106