K-LaKn4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.671004 n_e = 1.673797	V_d = 57.27 V_e = 57.03	n_F - n_C = 0.011715 n_F' - n_C' = 0.011814	Coloring: 0.31 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.7438989 C2 = -0.012439716 C3 = 0.017318651 C4 = 0.00030018664 C5 = -0.0000026388169 C6 = 0.00000043136059

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.657780
n _s	1.661108
n _r	1.665405
n _C	1.667438
n _C'	1.668006
n _0.6328	1.668536
n _D	1.670899
n _d	1.671004
n _e	1.673797
n _F	1.679153
n _F'	1.679820
n _g	1.685519
n _h	1.690804
n _i	1.699820
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8244
P_C,A'	0.3483
P_d,C	0.3043
P_e,C	0.5428
P_g,d	1.2390
P_g,F	0.5434
P_h,g	0.4511
P_i,g	1.2207
P_C',t	0.8728
P_e,C'	0.4943
P_F',e	0.5140
P_i,F'	1.7072

transmittance: 10 mm
τ_0.31	0.086
τ_0.32	0.274
τ_0.33	0.493
τ_0.34	0.665
τ_0.35	0.792
τ_0.36	0.869
τ_0.37	0.922
τ_0.38	0.95
τ_0.39	0.964
τ_0.4	0.971
τ_0.42	0.981
τ_0.44	0.982
τ_0.46	0.985
τ_0.48	0.988
τ_0.5	0.992
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	0.992
τ₂	0.964

transmittance: 25 mm
τ_0.32	0.039
τ_0.33	0.171
τ_0.34	0.361
τ_0.35	0.559
τ_0.36	0.705
τ_0.37	0.817
τ_0.38	0.88
τ_0.39	0.913
τ_0.4	0.93
τ_0.42	0.954
τ_0.44	0.957
τ_0.46	0.964
τ_0.48	0.971
τ_0.5	0.982
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	0.982
τ₂	0.913

Poisson coef.: 0.288
Rigidity: 359 Pa*10⁸
Young module: 925 Pa*10⁸
Knoop hardness: 564
Abrasion: 150

Climatic resistance: 2
Resistance to acids: 5

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	85