K-GFK68 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.592398 n_e = 1.594466	V_d = 68.36 V_e = 67.96	n_F - n_C = 0.008665 n_F' - n_C' = 0.008746	Coloring: 0.28 - 0.34 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4998338 C2 = -0.006118952 C3 = 0.012513487 C4 = 0.00022374985 C5 = -0.0000054349382 C6 = 0.00000029740284

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.583009
n _s	1.585255
n _r	1.588303
n _C	1.589779
n _C'	1.590194
n _0.6328	1.590583
n _D	1.592321
n _d	1.592398
n _e	1.594466
n _F	1.598445
n _F'	1.598941
n _g	1.603179
n _h	1.607100
n _i	1.613749
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7812
P_C,A'	0.3397
P_d,C	0.3022
P_e,C	0.5407
P_g,d	1.2440
P_g,F	0.5463
P_h,g	0.4524
P_i,g	1.2197
P_C',t	0.8291
P_e,C'	0.4928
P_F',e	0.5164
P_i,F'	1.7088

transmittance: 10 mm
τ_0.28	0.179
τ_0.29	0.255
τ_0.3	0.376
τ_0.31	0.384
τ_0.32	0.69
τ_0.33	0.819
τ_0.34	0.901
τ_0.35	0.953
τ_0.36	0.978
τ_0.37	0.99
τ_0.38	0.995
τ_0.39	0.997
τ_0.4	0.997
τ_0.42	0.997
τ_0.44	0.997
τ_0.46	0.997
τ_0.48	0.997
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_1.06	0.992
τ_1.5	0.988
τ₂	0.982

transmittance: 25 mm
τ_0.28	0.013
τ_0.29	0.033
τ_0.3	0.087
τ_0.31	0.091
τ_0.32	0.396
τ_0.33	0.608
τ_0.34	0.771
τ_0.35	0.887
τ_0.36	0.947
τ_0.37	0.975
τ_0.38	0.989
τ_0.39	0.992
τ_0.4	0.992
τ_0.42	0.992
τ_0.44	0.992
τ_0.46	0.992
τ_0.48	0.992
τ_0.5	0.992
τ_0.55	0.996
τ_0.6	0.996
τ_0.65	0.996
τ_0.7	0.996
τ_0.8	0.996
τ_1.06	0.982
τ_1.5	0.971
τ₂	0.957

Poisson coef.: 0.308
Rigidity: 261 Pa*10⁸
Young module: 683 Pa*10⁸
Knoop hardness: 368
Abrasion: 540

Climatic resistance: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	152