K-SK18 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.638541 n_e = 1.641282	V_d = 55.49 V_e = 55.21	n_F - n_C = 0.011506 n_F' - n_C' = 0.011614	Coloring: 0.33 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.638421 C2 = -0.01082757 C3 = 0.016058787 C4 = 0.00050122569 C5 = -0.000030687755 C6 = 0.0000022546387

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.625839
n _s	1.628973
n _r	1.633091
n _C	1.635061
n _C'	1.635614
n _0.6328	1.636130
n _D	1.638439
n _d	1.638541
n _e	1.641282
n _F	1.646568
n _F'	1.647228
n _g	1.652891
n _h	1.658179
n _i	1.667310
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8014
P_C,A'	0.3425
P_d,C	0.3024
P_e,C	0.5406
P_g,d	1.2471
P_g,F	0.5495
P_h,g	0.4595
P_i,g	1.2530
P_C',t	0.8494
P_e,C'	0.4926
P_F',e	0.5167
P_i,F'	1.7452

transmittance: 10 mm
τ_0.33	0.05
τ_0.34	0.126
τ_0.35	0.425
τ_0.36	0.669
τ_0.37	0.826
τ_0.38	0.907
τ_0.39	0.95
τ_0.4	0.971
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	0.997
τ_1.5	0.992
τ₂	0.971

transmittance: 25 mm
τ_0.35	0.118
τ_0.36	0.366
τ_0.37	0.62
τ_0.38	0.783
τ_0.39	0.88
τ_0.4	0.93
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	0.992
τ_1.5	0.982
τ₂	0.93

Poisson coef.: 0.272
Rigidity: 338 Pa*10⁸
Young module: 860 Pa*10⁸
Knoop hardness: 574
Abrasion: 160

Climatic resistance: 2
Resistance to acids: 5

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	81