K-SK4 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.612719 n_e = 1.615213	V_d = 58.57 V_e = 58.31	n_F - n_C = 0.010459 n_F' - n_C' = 0.010550	Coloring: 0.29 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5564282 C2 = -0.0086472663 C3 = 0.016443872 C4 = -0.00016346553 C5 = 0.000055351445 C6 = -0.000002596736

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.601069
n _s	1.603939
n _r	1.607731
n _C	1.609540
n _C'	1.610046
n _0.6328	1.610519
n _D	1.612626
n _d	1.612719
n _e	1.615213
n _F	1.620000
n _F'	1.620596
n _g	1.625701
n _h	1.630439
n _i	1.638490
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8097
P_C,A'	0.3464
P_d,C	0.3039
P_e,C	0.5423
P_g,d	1.2410
P_g,F	0.5450
P_h,g	0.4529
P_i,g	1.2226
P_C',t	0.8581
P_e,C'	0.4939
P_F',e	0.5146
P_i,F'	1.7106

transmittance: 10 mm
τ_0.28	0.022
τ_0.29	0.122
τ_0.3	0.329
τ_0.31	0.54
τ_0.32	0.708
τ_0.33	0.829
τ_0.34	0.901
τ_0.35	0.943
τ_0.36	0.965
τ_0.37	0.978
τ_0.38	0.985
τ_0.39	0.988
τ_0.4	0.991
τ_0.42	0.991
τ_0.44	0.991
τ_0.46	0.995
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.998
τ_1.5	0.998
τ₂	0.971

transmittance: 25 mm
τ_0.3	0.062
τ_0.31	0.214
τ_0.32	0.423
τ_0.33	0.625
τ_0.34	0.771
τ_0.35	0.864
τ_0.36	0.916
τ_0.37	0.947
τ_0.38	0.964
τ_0.39	0.971
τ_0.4	0.978
τ_0.42	0.978
τ_0.44	0.978
τ_0.46	0.989
τ_0.48	0.989
τ_0.5	0.992
τ_0.55	0.992
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.996
τ_1.5	0.996
τ₂	0.93

Poisson coef.: 0.268
Rigidity: 320 Pa*10⁸
Young module: 811 Pa*10⁸
Knoop hardness: 570
Abrasion: 140

Climatic resistance: 2
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	76