K-SK7 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.607292 n_e = 1.609726	V_d = 59.48 V_e = 59.22	n_F - n_C = 0.010208 n_F' - n_C' = 0.010294	Coloring: 0.30 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5409007 C2 = -0.0092687497 C3 = 0.0157149 C4 = -0.000088800332 C5 = 0.000043287422 C6 = -0.0000019899345

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.595810
n _s	1.598671
n _r	1.602409
n _C	1.604182
n _C'	1.604677
n _0.6328	1.605140
n _D	1.607201
n _d	1.607292
n _e	1.609726
n _F	1.614391
n _F'	1.614972
n _g	1.619937
n _h	1.624540
n _i	1.632359
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8201
P_C,A'	0.3484
P_d,C	0.3046
P_e,C	0.5430
P_g,d	1.2386
P_g,F	0.5432
P_h,g	0.4509
P_i,g	1.2168
P_C',t	0.8686
P_e,C'	0.4945
P_F',e	0.5138
P_i,F'	1.7032

transmittance: 10 mm
τ_0.29	0.013
τ_0.3	0.138
τ_0.31	0.371
τ_0.32	0.582
τ_0.33	0.753
τ_0.34	0.846
τ_0.35	0.915
τ_0.36	0.943
τ_0.37	0.964
τ_0.38	0.974
τ_0.39	0.977
τ_0.4	0.981
τ_0.42	0.982
τ_0.44	0.982
τ_0.46	0.985
τ_0.48	0.985
τ_0.5	0.988
τ_0.55	0.991
τ_0.6	0.992
τ_0.65	0.992
τ_0.7	0.995
τ_0.8	0.998
τ_1.06	0.985
τ_1.5	0.978
τ₂	0.954

transmittance: 25 mm
τ_0.31	0.084
τ_0.32	0.258
τ_0.33	0.492
τ_0.34	0.659
τ_0.35	0.801
τ_0.36	0.864
τ_0.37	0.913
τ_0.38	0.937
τ_0.39	0.944
τ_0.4	0.954
τ_0.42	0.957
τ_0.44	0.957
τ_0.46	0.964
τ_0.48	0.964
τ_0.5	0.971
τ_0.55	0.978
τ_0.6	0.982
τ_0.65	0.982
τ_0.7	0.989
τ_0.8	0.996
τ_1.06	0.964
τ_1.5	0.947
τ₂	0.89

Poisson coef.: 0.263
Rigidity: 335 Pa*10⁸
Young module: 847 Pa*10⁸
Knoop hardness: 563
Abrasion: 130

Climatic resistance: 2
Resistance to acids: 5

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	71