SK9 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.614049 n_e = 1.616705	V_d = 55.10 V_e = 54.81	n_F - n_C = 0.011143 n_F' - n_C' = 0.011250	Coloring: 0.31 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5598616 C2 = -0.0092684848 C3 = 0.01574161 C4 = 0.00037696688 C5 = -0.000014527816 C6 = 0.0000012396803

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.601869
n _s	1.604834
n _r	1.608784
n _C	1.610684
n _C'	1.611218
n _0.6328	1.611717
n _D	1.613950
n _d	1.614049
n _e	1.616705
n _F	1.621828
n _F'	1.622468
n _g	1.627959
n _h	1.633080
n _i	1.641889
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7910
P_C,A'	0.3406
P_d,C	0.3019
P_e,C	0.5402
P_g,d	1.2482
P_g,F	0.5501
P_h,g	0.4595
P_i,g	1.2500
P_C',t	0.8389
P_e,C'	0.4923
P_F',e	0.5172
P_i,F'	1.7427

transmittance: 10 mm
τ_0.31	0.037
τ_0.32	0.371
τ_0.33	0.701
τ_0.34	0.865
τ_0.35	0.936
τ_0.36	0.96
τ_0.37	0.974
τ_0.38	0.981
τ_0.39	0.982
τ_0.4	0.985
τ_0.42	0.985
τ_0.44	0.988
τ_0.46	0.988
τ_0.48	0.99
τ_0.5	0.991
τ_0.55	0.992
τ_0.6	0.994
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.978

transmittance: 25 mm
τ_0.32	0.084
τ_0.33	0.411
τ_0.34	0.697
τ_0.35	0.848
τ_0.36	0.903
τ_0.37	0.937
τ_0.38	0.954
τ_0.39	0.957
τ_0.4	0.964
τ_0.42	0.964
τ_0.44	0.971
τ_0.46	0.971
τ_0.48	0.975
τ_0.5	0.978
τ_0.55	0.982
τ_0.6	0.985
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.947

Poisson coef.: 0.267
Rigidity: 307 Pa*10⁸
Young module: 779 Pa*10⁸
Knoop hardness: 501
Abrasion: 140

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	70