K-LaFn2 - Sumita

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.696999 n_e = 1.700421	V_d = 48.46 V_e = 48.17	n_F - n_C = 0.014380 n_F' - n_C' = 0.014539	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8209581 C2 = -0.012387214 C3 = 0.01929917 C4 = 0.0010436756 C5 = -0.000077921095 C6 = 0.0000051365409

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.681639
n _s	1.685330
n _r	1.690290
n _C	1.692699
n _C'	1.693378
n _0.6328	1.694015
n _D	1.696872
n _d	1.696999
n _e	1.700421
n _F	1.707080
n _F'	1.707918
n _g	1.715140
n _h	1.721949
n _i	1.733869
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7690
P_C,A'	0.3336
P_d,C	0.2990
P_e,C	0.5369
P_g,d	1.2614
P_g,F	0.5604
P_h,g	0.4734
P_i,g	1.3023
P_C',t	0.8162
P_e,C'	0.4896
P_F',e	0.5213
P_i,F'	1.8046

transmittance: 10 mm
τ_0.34	0.082
τ_0.35	0.414
τ_0.36	0.708
τ_0.37	0.86
τ_0.38	0.922
τ_0.39	0.951
τ_0.4	0.965
τ_0.42	0.977
τ_0.44	0.982
τ_0.46	0.985
τ_0.48	0.988
τ_0.5	0.992
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	0.998
τ_1.5	0.995
τ₂	0.968

transmittance: 25 mm
τ_0.35	0.11
τ_0.36	0.423
τ_0.37	0.686
τ_0.38	0.817
τ_0.39	0.883
τ_0.4	0.916
τ_0.42	0.944
τ_0.44	0.957
τ_0.46	0.964
τ_0.48	0.971
τ_0.5	0.982
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	0.996
τ_1.5	0.989
τ₂	0.923

Poisson coef.: 0.285
Rigidity: 265 Pa*10⁸
Young module: 682 Pa*10⁸
Knoop hardness: 526
Abrasion: 150

Climatic resistance: 1
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
100 ~ 300	86