K-LaFn1 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.684998 n_e = 1.688309	V_d = 49.22 V_e = 48.92	n_F - n_C = 0.013916 n_F' - n_C' = 0.014067	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.7831037 C2 = -0.012354306 C3 = 0.018328162 C4 = 0.0010714523 C5 = -0.000085608858 C6 = 0.0000054247225

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.670080
n _s	1.673679
n _r	1.678497
n _C	1.680833
n _C'	1.681491
n _0.6328	1.682107
n _D	1.684875
n _d	1.684998
n _e	1.688309
n _F	1.694749
n _F'	1.695558
n _g	1.702532
n _h	1.709098
n _i	1.720580
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7726
P_C,A'	0.3344
P_d,C	0.2993
P_e,C	0.5372
P_g,d	1.2599
P_g,F	0.5592
P_h,g	0.4718
P_i,g	1.2968
P_C',t	0.8199
P_e,C'	0.4899
P_F',e	0.5208
P_i,F'	1.7979

transmittance: 10 mm
τ_0.34	0.138
τ_0.35	0.482
τ_0.36	0.74
τ_0.37	0.862
τ_0.38	0.919
τ_0.39	0.96
τ_0.4	0.971
τ_0.42	0.974
τ_0.44	0.978
τ_0.46	0.982
τ_0.48	0.985
τ_0.5	0.988
τ_0.55	0.995
τ_0.6	0.995
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.997
τ₂	0.977

transmittance: 25 mm
τ_0.35	0.161
τ_0.36	0.471
τ_0.37	0.691
τ_0.38	0.81
τ_0.39	0.903
τ_0.4	0.93
τ_0.42	0.937
τ_0.44	0.947
τ_0.46	0.957
τ_0.48	0.964
τ_0.5	0.971
τ_0.55	0.989
τ_0.6	0.989
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.992
τ₂	0.944

Poisson coef.: 0.267
Rigidity: 355 Pa*10⁸
Young module: 900 Pa*10⁸
Knoop hardness: 544
Abrasion: 150

Climatic resistance: 1
Resistance to acids: 4

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