K-LaF2 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.744003 n_e = 1.747947	V_d = 44.84 V_e = 44.56	n_F - n_C = 0.016591 n_F' - n_C' = 0.016781	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.9687813 C2 = -0.012117585 C3 = 0.024462371 C4 = 0.00079112124 C5 = -0.000033978917 C6 = 0.0000039862263

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.726509
n _s	1.730635
n _r	1.736290
n _C	1.739055
n _C'	1.739836
n _0.6328	1.740568
n _D	1.743857
n _d	1.744003
n _e	1.747947
n _F	1.755647
n _F'	1.756618
n _g	1.765018
n _h	1.772991
n _i	1.787069
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7561
P_C,A'	0.3313
P_d,C	0.2982
P_e,C	0.5359
P_g,d	1.2666
P_g,F	0.5648
P_h,g	0.4805
P_i,g	1.3290
P_C',t	0.8032
P_e,C'	0.4888
P_F',e	0.5225
P_i,F'	1.8353

transmittance: 10 mm
τ_0.34	0.027
τ_0.35	0.279
τ_0.36	0.606
τ_0.37	0.795
τ_0.38	0.882
τ_0.39	0.925
τ_0.4	0.947
τ_0.42	0.967
τ_0.44	0.974
τ_0.46	0.978
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.99
τ_0.6	0.992
τ_0.65	0.994
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.974

transmittance: 25 mm
τ_0.35	0.041
τ_0.36	0.286
τ_0.37	0.564
τ_0.38	0.73
τ_0.39	0.823
τ_0.4	0.874
τ_0.42	0.92
τ_0.44	0.937
τ_0.46	0.947
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.975
τ_0.6	0.982
τ_0.65	0.985
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.937

Poisson coef.: 0.276
Rigidity: 397 Pa*10⁸
Young module: 1021 Pa*10⁸
Knoop hardness: 615
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	86