LF4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.578451 n_e = 1.581742	V_d = 41.71 V_e = 41.43	n_F - n_C = 0.013867 n_F' - n_C' = 0.014039	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.436319 C2 = -0.0085401033 C3 = 0.018663876 C4 = 0.00045300742 C5 = 0.0000066459967 C6 = 0.0000016027138

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.564010
n _s	1.567387
n _r	1.572050
n _C	1.574340
n _C'	1.574987
n _0.6328	1.575594
n _D	1.578329
n _d	1.578451
n _e	1.581742
n _F	1.588208
n _F'	1.589027
n _g	1.596154
n _h	1.602978
n _i	1.615140
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7449
P_C,A'	0.3278
P_d,C	0.2964
P_e,C	0.5337
P_g,d	1.2765
P_g,F	0.5730
P_h,g	0.4920
P_i,g	1.3690
P_C',t	0.7915
P_e,C'	0.4870
P_F',e	0.5252
P_i,F'	1.8829

transmittance: 10 mm
τ_0.31	0.022
τ_0.32	0.187
τ_0.33	0.613
τ_0.34	0.826
τ_0.35	0.915
τ_0.36	0.957
τ_0.37	0.975
τ_0.38	0.975
τ_0.39	0.985
τ_0.4	0.988
τ_0.42	0.988
τ_0.44	0.99
τ_0.46	0.99
τ_0.48	0.99
τ_0.5	0.992
τ_0.55	0.995
τ_0.6	0.995
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.953

transmittance: 25 mm
τ_0.32	0.015
τ_0.33	0.294
τ_0.34	0.62
τ_0.35	0.801
τ_0.36	0.896
τ_0.37	0.94
τ_0.38	0.94
τ_0.39	0.964
τ_0.4	0.971
τ_0.42	0.971
τ_0.44	0.975
τ_0.46	0.975
τ_0.48	0.975
τ_0.5	0.982
τ_0.55	0.989
τ_0.6	0.989
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.887

Poisson coef.: 0.218
Rigidity: 249 Pa*10⁸
Young module: 607 Pa*10⁸
Knoop hardness: 479
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	98