K7 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.511120 n_e = 1.513135	V_d = 60.44 V_e = 60.17	n_F - n_C = 0.008456 n_F' - n_C' = 0.008527	Coloring: 0.30 - 0.33 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.2509295 C2 = -0.0078312663 C3 = 0.012111011 C4 = -0.000071712558 C5 = 0.000037220148 C6 = -0.0000017882575

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.501539
n _s	1.503954
n _r	1.507071
n _C	1.508543
n _C'	1.508954
n _0.6328	1.509337
n _D	1.511044
n _d	1.511120
n _e	1.513135
n _F	1.516999
n _F'	1.517481
n _g	1.521601
n _h	1.525426
n _i	1.531929
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8282
P_C,A'	0.3496
P_d,C	0.3046
P_e,C	0.5430
P_g,d	1.2394
P_g,F	0.5441
P_h,g	0.4523
P_i,g	1.2213
P_C',t	0.8768
P_e,C'	0.4944
P_F',e	0.5139
P_i,F'	1.7085

transmittance: 10 mm
τ_0.3	0.072
τ_0.31	0.36
τ_0.32	0.65
τ_0.33	0.833
τ_0.34	0.915
τ_0.35	0.954
τ_0.36	0.974
τ_0.37	0.98
τ_0.38	0.978
τ_0.39	0.985
τ_0.4	0.99
τ_0.42	0.99
τ_0.44	0.99
τ_0.46	0.99
τ_0.48	0.992
τ_0.5	0.992
τ_0.55	0.995
τ_0.6	0.997
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	0.933

transmittance: 25 mm
τ_0.31	0.078
τ_0.32	0.341
τ_0.33	0.633
τ_0.34	0.801
τ_0.35	0.89
τ_0.36	0.937
τ_0.37	0.95
τ_0.38	0.947
τ_0.39	0.964
τ_0.4	0.975
τ_0.42	0.975
τ_0.44	0.975
τ_0.46	0.975
τ_0.48	0.982
τ_0.5	0.982
τ_0.55	0.99
τ_0.6	0.992
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	0.844

Poisson coef.: 0.215
Rigidity: 288 Pa*10⁸
Young module: 701 Pa*10⁸
Knoop hardness: 485
Abrasion: 110

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	91