K-LaK8 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.713002 n_e = 1.716155	V_d = 53.90 V_e = 53.66	n_F - n_C = 0.013227 n_F' - n_C' = 0.013344	Coloring: 0.31 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8792047 C2 = -0.014691398 C3 = 0.019634857 C4 = 0.0004036515 C5 = -0.0000012936634 C6 = 0.00000022997241

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.698110
n _s	1.701864
n _r	1.706698
n _C	1.708985
n _C'	1.709625
n _0.6328	1.710222
n _D	1.712885
n _d	1.713002
n _e	1.716155
n _F	1.722213
n _F'	1.722969
n _g	1.729438
n _h	1.735450
n _i	1.745719
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8221
P_C,A'	0.3470
P_d,C	0.3036
P_e,C	0.5419
P_g,d	1.2424
P_g,F	0.5461
P_h,g	0.4545
P_i,g	1.2308
P_C',t	0.8705
P_e,C'	0.4936
P_F',e	0.5151
P_i,F'	1.7198

transmittance: 10 mm
τ_0.31	0.037
τ_0.32	0.126
τ_0.33	0.27
τ_0.34	0.442
τ_0.35	0.606
τ_0.36	0.743
τ_0.37	0.835
τ_0.38	0.894
τ_0.39	0.929
τ_0.4	0.948
τ_0.42	0.967
τ_0.44	0.974
τ_0.46	0.977
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.988
τ_0.6	0.99
τ_0.65	0.991
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.971

transmittance: 25 mm
τ_0.33	0.037
τ_0.34	0.13
τ_0.35	0.286
τ_0.36	0.477
τ_0.37	0.638
τ_0.38	0.756
τ_0.39	0.832
τ_0.4	0.877
τ_0.42	0.92
τ_0.44	0.937
τ_0.46	0.944
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.971
τ_0.6	0.975
τ_0.65	0.978
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.93

Poisson coef.: 0.296
Rigidity: 459 Pa*10⁸
Young module: 1190 Pa*10⁸
Knoop hardness: 746
Abrasion: 70

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	75