SK2 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.607379 n_e = 1.609935	V_d = 56.65 V_e = 56.37	n_F - n_C = 0.010721 n_F' - n_C' = 0.010820	Coloring: 0.30 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5409528 C2 = -0.0096968315 C3 = 0.01481426 C4 = 0.00043251578 C5 = -0.00002402862 C6 = 0.0000015238211

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.595550
n _s	1.598461
n _r	1.602297
n _C	1.604134
n _C'	1.604649
n _0.6328	1.605131
n _D	1.607284
n _d	1.607379
n _e	1.609935
n _F	1.614855
n _F'	1.615470
n _g	1.620725
n _h	1.625611
n _i	1.633979
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8007
P_C,A'	0.3427
P_d,C	0.3026
P_e,C	0.5410
P_g,d	1.2448
P_g,F	0.5475
P_h,g	0.4557
P_i,g	1.2362
P_C',t	0.8487
P_e,C'	0.4929
P_F',e	0.5162
P_i,F'	1.7264

transmittance: 10 mm
τ_0.29	0.196
τ_0.3	0.392
τ_0.31	0.663
τ_0.32	0.812
τ_0.33	0.964
τ_0.34	0.943
τ_0.35	0.96
τ_0.36	0.968
τ_0.37	0.974
τ_0.38	0.978
τ_0.39	0.981
τ_0.4	0.982
τ_0.42	0.982
τ_0.44	0.982
τ_0.46	0.988
τ_0.48	0.992
τ_0.5	0.992
τ_0.55	0.992
τ_0.6	0.992
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_1.06	0.995
τ_1.5	0.988
τ₂	0.977

transmittance: 25 mm
τ_0.29	0.017
τ_0.3	0.096
τ_0.31	0.357
τ_0.32	0.595
τ_0.33	0.913
τ_0.34	0.864
τ_0.35	0.903
τ_0.36	0.923
τ_0.37	0.937
τ_0.38	0.947
τ_0.39	0.954
τ_0.4	0.957
τ_0.42	0.957
τ_0.44	0.957
τ_0.46	0.971
τ_0.48	0.982
τ_0.5	0.982
τ_0.55	0.982
τ_0.6	0.982
τ_0.65	0.989
τ_0.7	0.992
τ_0.8	0.996
τ_1.06	0.989
τ_1.5	0.971
τ₂	0.944

Poisson coef.: 0.246
Rigidity: 314 Pa*10⁸
Young module: 782 Pa*10⁸
Knoop hardness: 568
Abrasion: 130

Climatic resistance: 1
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	69