SF7 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.639801 n_e = 1.644181	V_d = 34.60 V_e = 34.35	n_F - n_C = 0.018490 n_F' - n_C' = 0.018752	Coloring: 0.33 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.6147991 C2 = -0.0098878577 C3 = 0.02328456 C4 = 0.001383318 C5 = -0.000087050383 C6 = 0.0000088830147

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.621269
n _s	1.625458
n _r	1.631411
n _C	1.634389
n _C'	1.635236
n _0.6328	1.636033
n _D	1.639639
n _d	1.639801
n _e	1.644181
n _F	1.652879
n _F'	1.653989
n _g	1.663719
n _h	1.673170
n _i	1.690429
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7095
P_C,A'	0.3180
P_d,C	0.2926
P_e,C	0.5295
P_g,d	1.2935
P_g,F	0.5862
P_h,g	0.5111
P_i,g	1.4445
P_C',t	0.7553
P_e,C'	0.4837
P_F',e	0.5304
P_i,F'	1.9708

transmittance: 10 mm
τ_0.33	0.072
τ_0.34	0.482
τ_0.35	0.779
τ_0.36	0.897
τ_0.37	0.95
τ_0.38	0.967
τ_0.39	0.978
τ_0.4	0.985
τ_0.42	0.988
τ_0.44	0.99
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.994
τ_0.55	0.995
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	0.998
τ₂	0.964

transmittance: 25 mm
τ_0.34	0.161
τ_0.35	0.536
τ_0.36	0.762
τ_0.37	0.88
τ_0.38	0.92
τ_0.39	0.947
τ_0.4	0.964
τ_0.42	0.971
τ_0.44	0.975
τ_0.46	0.978
τ_0.48	0.985
τ_0.5	0.985
τ_0.55	0.989
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	0.996
τ₂	0.913

Poisson coef.: 0.23
Rigidity: 218 Pa*10⁸
Young module: 537 Pa*10⁸
Knoop hardness: 389
Abrasion: 170

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	94