K-LaF3 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.717002 n_e = 1.720566	V_d = 47.86 V_e = 47.58	n_F - n_C = 0.014979 n_F' - n_C' = 0.015142	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8849358 C2 = -0.012668322 C3 = 0.021170498 C4 = 0.00085117754 C5 = -0.00004902482 C6 = 0.0000037361709

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.700960
n _s	1.704814
n _r	1.710001
n _C	1.712517
n _C'	1.713226
n _0.6328	1.713890
n _D	1.716870
n _d	1.717002
n _e	1.720566
n _F	1.727497
n _F'	1.728368
n _g	1.735882
n _h	1.742964
n _i	1.755340
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7715
P_C,A'	0.3346
P_d,C	0.2993
P_e,C	0.5372
P_g,d	1.2603
P_g,F	0.5597
P_h,g	0.4727
P_i,g	1.2989
P_C',t	0.8188
P_e,C'	0.4899
P_F',e	0.5208
P_i,F'	1.8005

transmittance: 10 mm
τ_0.34	0.154
τ_0.35	0.482
τ_0.36	0.746
τ_0.37	0.867
τ_0.38	0.92
τ_0.39	0.946
τ_0.4	0.957
τ_0.42	0.968
τ_0.44	0.971
τ_0.46	0.977
τ_0.48	0.981
τ_0.5	0.985
τ_0.55	0.988
τ_0.6	0.988
τ_0.65	0.991
τ_0.7	0.994
τ_0.8	0.998
τ_1.06	0.997
τ_1.5	0.994
τ₂	0.971

transmittance: 25 mm
τ_0.35	0.161
τ_0.36	0.481
τ_0.37	0.7
τ_0.38	0.813
τ_0.39	0.87
τ_0.4	0.896
τ_0.42	0.923
τ_0.44	0.93
τ_0.46	0.944
τ_0.48	0.954
τ_0.5	0.964
τ_0.55	0.971
τ_0.6	0.971
τ_0.65	0.978
τ_0.7	0.985
τ_0.8	0.996
τ_1.06	0.992
τ_1.5	0.985
τ₂	0.93

Poisson coef.: 0.275
Rigidity: 371 Pa*10⁸
Young module: 946 Pa*10⁸
Knoop hardness: 555
Abrasion: 160

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	87