SF4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.755199 n_e = 1.761677	V_d = 27.53 V_e = 27.32	n_F - n_C = 0.027428 n_F' - n_C' = 0.027875	Coloring: 0.35 - 0.41 mkm.

Type: Schott
Spectral range: 0.4046561 - 1.01398 mkm.
C1 = 2.961286 C2 = -0.0097184593 C3 = 0.036746182 C4 = 0.0021217619 C5 = -0.00010682716 C6 = 0.000016287508

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.728860
n _s	1.734543
n _r	1.742976
n _C	1.747281
n _C'	1.748513
n _0.6328	1.749674
n _D	1.754961
n _d	1.755199
n _e	1.761677
n _F	1.774710
n _F'	1.776389
n _g	1.791261
n _h	1.805978
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6716
P_C,A'	0.3081
P_d,C	0.2886
P_e,C	0.5248
P_g,d	1.3147
P_g,F	0.6034
P_h,g	0.5365
P_i,g	-----
P_C',t	0.7165
P_e,C'	0.4799
P_F',e	0.5363
P_i,F'	-----

transmittance: 10 mm
τ_0.35	0.013
τ_0.36	0.135
τ_0.37	0.526
τ_0.38	0.764
τ_0.39	0.852
τ_0.4	0.904
τ_0.42	0.96
τ_0.44	0.977
τ_0.46	0.988
τ_0.48	0.991
τ_0.5	0.995
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.99
τ_1.5	0.978
τ₂	0.961

transmittance: 25 mm
τ_0.37	0.203
τ_0.38	0.511
τ_0.39	0.67
τ_0.4	0.777
τ_0.42	0.903
τ_0.44	0.944
τ_0.46	0.971
τ_0.48	0.978
τ_0.5	0.989
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.975
τ_1.5	0.947
τ₂	0.906

Poisson coef.: 0.238
Rigidity: 223 Pa*10⁸
Young module: 552 Pa*10⁸
Knoop hardness: 340
Abrasion: 190

Climatic resistance: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	85