NBFD11 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.785896 n_e = 1.790150	V_d = 43.93 V_e = 43.70	n_F - n_C = 0.017887 n_F' - n_C' = 0.018080	Coloring: 0.32 - 0.39 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 3.1010267 C2 = -0.010022108 C3 = 0.032631687 C4 = -0.00081029268 C5 = 0.0001935011 C6 = -0.0000080279799

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.766879
n _s	1.771335
n _r	1.777518
n _C	1.780532
n _C'	1.781381
n _0.6328	1.782176
n _D	1.785738
n _d	1.785896
n _e	1.790150
n _F	1.798420
n _F'	1.799461
n _g	1.808458
n _h	1.816962
n _i	1.831747
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7632
P_C,A'	0.3355
P_d,C	0.2998
P_e,C	0.5376
P_g,d	1.2612
P_g,F	0.5611
P_h,g	0.4754
P_i,g	1.3019
P_C',t	0.8106
P_e,C'	0.4902
P_F',e	0.5205
P_i,F'	1.8049

transmittance: 5 mm
τ_1.55	0.998
τ_1.5	0.997
τ_1.4	0.998
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.999
τ_1.06	0.999
τ_1.05	0.999
τ₁	0.999
τ_0.95	0.999
τ_0.9	0.999
τ_0.85	0.999
τ_0.83	0.999
τ_0.8	0.999
τ_0.78	0.999
τ_0.75	0.999
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.996
τ_0.48	0.994
τ_0.46	0.992
τ_0.44	0.99
τ_0.42	0.987
τ_0.4	0.978
τ_0.39	0.97
τ_0.38	0.95
τ_0.37	0.93
τ_0.36	0.88
τ_0.35	0.81
τ_0.34	0.69
τ_0.33	0.5
τ_0.32	0.24
τ_0.31	0.06

transmittance: 10 mm
τ_1.55	0.996
τ_1.5	0.994
τ_1.4	0.997
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.999
τ_1.06	0.999
τ_1.05	0.999
τ₁	0.999
τ_0.95	0.999
τ_0.9	0.999
τ_0.85	0.999
τ_0.83	0.999
τ_0.8	0.999
τ_0.78	0.999
τ_0.75	0.998
τ_0.7	0.997
τ_0.65	0.997
τ_0.6	0.997
τ_0.55	0.997
τ_0.5	0.993
τ_0.48	0.988
τ_0.46	0.984
τ_0.44	0.979
τ_0.42	0.973
τ_0.4	0.957
τ_0.39	0.94
τ_0.38	0.91
τ_0.37	0.86
τ_0.36	0.78
τ_0.35	0.65
τ_0.34	0.48
τ_0.33	0.25
τ_0.32	0.06

Poisson coef.: 0.31
Rigidity: 420 Pa*10⁸
Young module: 1100 Pa*10⁸
Knoop hardness: 690
Optical stress coef.: 2.16 1/Pa*10¹²
Abrasion: 70

Staining: 3
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	57
100 ~ 300	71

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.7
-20 ~ 0		5.5
0 ~ 20		6.2
20 ~ 40		6.7
40 ~ 60		7.1
60 ~ 80		7.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		7.2
-20 ~ 0		7.6
0 ~ 20		7.9
20 ~ 40		8.2
40 ~ 60		8.5
60 ~ 80		8.6