K-SK20 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.559630 n_e = 1.561810	V_d = 61.24 V_e = 60.98	n_F - n_C = 0.009137 n_F' - n_C' = 0.009211	Coloring: 0.29 - 0.33 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.3978213 C2 = -0.0097050632 C3 = 0.012328613 C4 = 0.00031156106 C5 = -0.000017469483 C6 = 0.0000010725844

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.549230
n _s	1.551870
n _r	1.555249
n _C	1.556842
n _C'	1.557287
n _0.6328	1.557702
n _D	1.559548
n _d	1.559630
n _e	1.561810
n _F	1.565980
n _F'	1.566498
n _g	1.570920
n _h	1.575009
n _i	1.581970
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8330
P_C,A'	0.3502
P_d,C	0.3051
P_e,C	0.5436
P_g,d	1.2355
P_g,F	0.5406
P_h,g	0.4474
P_i,g	1.2091
P_C',t	0.8817
P_e,C'	0.4950
P_F',e	0.5130
P_i,F'	1.6930

transmittance: 10 mm
τ_0.29	0.066
τ_0.3	0.289
τ_0.31	0.552
τ_0.32	0.753
τ_0.33	0.86
τ_0.34	0.923
τ_0.35	0.957
τ_0.36	0.971
τ_0.37	0.98
τ_0.38	0.982
τ_0.39	0.985
τ_0.4	0.988
τ_0.42	0.988
τ_0.44	0.988
τ_0.46	0.99
τ_0.48	0.991
τ_0.5	0.991
τ_0.55	0.994
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	0.991
τ₂	0.963

transmittance: 25 mm
τ_0.3	0.045
τ_0.31	0.226
τ_0.32	0.492
τ_0.33	0.686
τ_0.34	0.82
τ_0.35	0.896
τ_0.36	0.93
τ_0.37	0.95
τ_0.38	0.957
τ_0.39	0.964
τ_0.4	0.971
τ_0.42	0.971
τ_0.44	0.971
τ_0.46	0.975
τ_0.48	0.978
τ_0.5	0.978
τ_0.55	0.985
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	0.978
τ₂	0.91

Poisson coef.: 0.235
Rigidity: 319 Pa*10⁸
Young module: 789 Pa*10⁸
Knoop hardness: 562
Abrasion: 120

Climatic resistance: 1
Resistance to acids: 2

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