LaSFn4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.784999 n_e = 1.789272	V_d = 43.67 V_e = 43.42	n_F - n_C = 0.017973 n_F' - n_C' = 0.018175	Coloring: 0.33 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 3.1022224 C2 = -0.011531366 C3 = 0.029134127 C4 = 0.00031968708 C5 = 0.00003586548 C6 = 0.00000050762944

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.766079
n _s	1.770501
n _r	1.776629
n _C	1.779631
n _C'	1.780478
n _0.6328	1.781272
n _D	1.784840
n _d	1.784999
n _e	1.789272
n _F	1.797604
n _F'	1.798653
n _g	1.807731
n _h	1.816329
n _i	1.831430
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7539
P_C,A'	0.3320
P_d,C	0.2986
P_e,C	0.5364
P_g,d	1.2647
P_g,F	0.5634
P_h,g	0.4784
P_i,g	1.3185
P_C',t	0.8011
P_e,C'	0.4892
P_F',e	0.5219
P_i,F'	1.8236

transmittance: 10 mm
τ_0.33	0.011
τ_0.34	0.17
τ_0.35	0.447
τ_0.36	0.666
τ_0.37	0.796
τ_0.38	0.88
τ_0.39	0.922
τ_0.4	0.946
τ_0.42	0.967
τ_0.44	0.974
τ_0.46	0.978
τ_0.48	0.982
τ_0.5	0.985
τ_0.55	0.988
τ_0.6	0.99
τ_0.65	0.992
τ_0.7	0.995
τ_0.8	0.997
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.975

transmittance: 25 mm
τ_0.34	0.012
τ_0.35	0.134
τ_0.36	0.363
τ_0.37	0.566
τ_0.38	0.728
τ_0.39	0.817
τ_0.4	0.87
τ_0.42	0.92
τ_0.44	0.937
τ_0.46	0.947
τ_0.48	0.957
τ_0.5	0.964
τ_0.55	0.971
τ_0.6	0.975
τ_0.65	0.982
τ_0.7	0.989
τ_0.8	0.992
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.94

Poisson coef.: 0.296
Rigidity: 430 Pa*10⁸
Young module: 1115 Pa*10⁸
Knoop hardness: 743
Abrasion: 90

Climatic resistance: 1
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	87