LF7 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.575009 n_e = 1.578313	V_d = 41.30 V_e = 41.03	n_F - n_C = 0.013920 n_F' - n_C' = 0.014094	Coloring: 0.31 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4248798 C2 = -0.0079967935 C3 = 0.018851219 C4 = 0.00043158299 C5 = 0.0000081793739 C6 = 0.0000015720523

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.560580
n _s	1.563931
n _r	1.568590
n _C	1.570885
n _C'	1.571534
n _0.6328	1.572143
n _D	1.574887
n _d	1.575009
n _e	1.578313
n _F	1.584805
n _F'	1.585628
n _g	1.592785
n _h	1.599637
n _i	1.611850
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7402
P_C,A'	0.3270
P_d,C	0.2962
P_e,C	0.5336
P_g,d	1.2769
P_g,F	0.5732
P_h,g	0.4922
P_i,g	1.3695
P_C',t	0.7868
P_e,C'	0.4869
P_F',e	0.5254
P_i,F'	1.8836

transmittance: 10 mm
τ_0.31	0.01
τ_0.32	0.294
τ_0.33	0.701
τ_0.34	0.882
τ_0.35	0.943
τ_0.36	0.971
τ_0.37	0.981
τ_0.38	0.981
τ_0.39	0.982
τ_0.4	0.985
τ_0.42	0.988
τ_0.44	0.988
τ_0.46	0.988
τ_0.48	0.99
τ_0.5	0.99
τ_0.55	0.994
τ_0.6	0.995
τ_0.65	0.997
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.951

transmittance: 25 mm
τ_0.32	0.047
τ_0.33	0.411
τ_0.34	0.73
τ_0.35	0.864
τ_0.36	0.93
τ_0.37	0.954
τ_0.38	0.954
τ_0.39	0.957
τ_0.4	0.964
τ_0.42	0.971
τ_0.44	0.971
τ_0.46	0.971
τ_0.48	0.975
τ_0.5	0.975
τ_0.55	0.985
τ_0.6	0.989
τ_0.65	0.992
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.883

Poisson coef.: 0.222
Rigidity: 232 Pa*10⁸
Young module: 566 Pa*10⁸
Knoop hardness: 420
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	89