BAF10 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.670027 n_e = 1.673402	V_d = 47.19 V_e = 46.90	n_F - n_C = 0.014196 n_F' - n_C' = 0.014357	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.7324621 C2 = -0.01249046 C3 = 0.018562334 C4 = 0.00099990536 C5 = -0.000068388552 C6 = 0.0000049257931

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.654859
n _s	1.658521
n _r	1.663417
n _C	1.665790
n _C'	1.666459
n _0.6328	1.667086
n _D	1.669902
n _d	1.670027
n _e	1.673402
n _F	1.679987
n _F'	1.680817
n _g	1.687995
n _h	1.694799
n _i	1.706798
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7699
P_C,A'	0.3331
P_d,C	0.2984
P_e,C	0.5361
P_g,d	1.2656
P_g,F	0.5640
P_h,g	0.4792
P_i,g	1.3244
P_C',t	0.8170
P_e,C'	0.4890
P_F',e	0.5223
P_i,F'	1.8301

transmittance: 5 mm
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.995
τ_0.48	0.993
τ_0.46	0.991
τ_0.44	0.986
τ_0.42	0.984
τ_0.4	0.975
τ_0.39	0.96
τ_0.38	0.94
τ_0.37	0.89
τ_0.36	0.78
τ_0.35	0.56
τ_0.34	0.22

transmittance: 10 mm
τ_0.7	0.997
τ_0.65	0.997
τ_0.6	0.997
τ_0.55	0.997
τ_0.5	0.99
τ_0.48	0.986
τ_0.46	0.982
τ_0.44	0.972
τ_0.42	0.969
τ_0.4	0.951
τ_0.39	0.921
τ_0.38	0.88
τ_0.37	0.78
τ_0.36	0.61
τ_0.35	0.32
τ_0.34	0.05

Poisson coef.: 0.277
Rigidity: 372 Pa*10⁸
Young module: 948 Pa*10⁸
Knoop hardness: 610
Optical stress coef.: 2.12 1/Pa*10¹²
Abrasion: 140

Staining: 1
Resistance to acids: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	83

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.4
-20 ~ 0		2.7
0 ~ 20		3
20 ~ 40		3.3
40 ~ 60		3.6
60 ~ 80		3.9

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.6
-20 ~ 0		4.6
0 ~ 20		4.7
20 ~ 40		4.7
40 ~ 60		4.9
60 ~ 80		5