K-LaSFn8 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.834997 n_e = 1.839643	V_d = 42.73 V_e = 42.48	n_F - n_C = 0.019538 n_F' - n_C' = 0.019761	Coloring: 0.33 - 0.41 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 3.2782547 C2 = -0.015874744 C3 = 0.029711102 C4 = 0.0010965326 C5 = -0.000045736257 C6 = 0.0000041481846

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.814339
n _s	1.819236
n _r	1.825911
n _C	1.829169
n _C'	1.830089
n _0.6328	1.830951
n _D	1.834825
n _d	1.834997
n _e	1.839643
n _F	1.848708
n _F'	1.849850
n _g	1.859719
n _h	1.869050
n _i	1.885399
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7589
P_C,A'	0.3316
P_d,C	0.2982
P_e,C	0.5360
P_g,d	1.2652
P_g,F	0.5635
P_h,g	0.4775
P_i,g	1.3143
P_C',t	0.8060
P_e,C'	0.4889
P_F',e	0.5223
P_i,F'	1.8194

transmittance: 10 mm
τ_0.31	0.003
τ_0.32	0.043
τ_0.33	0.211
τ_0.34	0.432
τ_0.35	0.619
τ_0.36	0.758
τ_0.37	0.847
τ_0.38	0.903
τ_0.39	0.938
τ_0.4	0.955
τ_0.42	0.976
τ_0.44	0.983
τ_0.46	0.99
τ_0.48	0.991
τ_0.5	0.994
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.998
τ_0.8	0.995
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.973

transmittance: 25 mm
τ_0.33	0.02
τ_0.34	0.123
τ_0.35	0.301
τ_0.36	0.5
τ_0.37	0.659
τ_0.38	0.775
τ_0.39	0.851
τ_0.4	0.892
τ_0.42	0.94
τ_0.44	0.959
τ_0.46	0.975
τ_0.48	0.978
τ_0.5	0.986
τ_0.55	0.995
τ_0.6	0.993
τ_0.65	0.99
τ_0.7	0.995
τ_0.8	0.987
τ_1.06	0.996
τ_1.5	0.995
τ₂	0.933

Poisson coef.: 0.29
Rigidity: 481 Pa*10⁸
Young module: 1240 Pa*10⁸
Knoop hardness: 602
Abrasion: 65

Climatic resistance: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	74