SF18 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.721506 n_e = 1.727331	V_d = 29.28 V_e = 29.06	n_F - n_C = 0.024640 n_F' - n_C' = 0.025028	Coloring: 0.34 - 0.40 mkm.

Type: Schott
Spectral range: 0.4046561 - 1.01398 mkm.
C1 = 2.8594457 C2 = -0.010229223 C3 = 0.031936097 C4 = 0.0020257382 C5 = -0.00011649195 C6 = 0.000014181908

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.697590
n _s	1.702818
n _r	1.710479
n _C	1.714370
n _C'	1.715482
n _0.6328	1.716529
n _D	1.721292
n _d	1.721506
n _e	1.727331
n _F	1.739010
n _F'	1.740510
n _g	1.753758
n _h	1.766790
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6810
P_C,A'	0.3104
P_d,C	0.2896
P_e,C	0.5260
P_g,d	1.3089
P_g,F	0.5985
P_h,g	0.5288
P_i,g	-----
P_C',t	0.7261
P_e,C'	0.4809
P_F',e	0.5348
P_i,F'	-----

transmittance: 10 mm
τ_0.34	0.05
τ_0.35	0.187
τ_0.36	0.482
τ_0.37	0.701
τ_0.38	0.815
τ_0.39	0.883
τ_0.4	0.929
τ_0.42	0.961
τ_0.44	0.974
τ_0.46	0.98
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.988
τ_0.6	0.99
τ_0.65	0.991
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.997
τ₂	0.968

transmittance: 25 mm
τ_0.35	0.015
τ_0.36	0.161
τ_0.37	0.411
τ_0.38	0.6
τ_0.39	0.733
τ_0.4	0.832
τ_0.42	0.906
τ_0.44	0.937
τ_0.46	0.95
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.971
τ_0.6	0.975
τ_0.65	0.978
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.992
τ₂	0.923

Poisson coef.: 0.237
Rigidity: 222 Pa*10⁸
Young module: 549 Pa*10⁸
Knoop hardness: 360
Abrasion: 210

Climatic resistance: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	91