BAC4 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.568829 n_e = 1.571246	V_d = 56.04 V_e = 55.77	n_F - n_C = 0.010149 n_F' - n_C' = 0.010241	Coloring: 0.30 - 0.35 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.4196645 C2 = -0.0083329314 C3 = 0.01539739 C4 = -0.00017391654 C5 = 0.00006218322 C6 = -0.000003062131

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.557550
n _s	1.560333
n _r	1.564002
n _C	1.565751
n _C'	1.566240
n _0.6328	1.566698
n _D	1.568738
n _d	1.568829
n _e	1.571246
n _F	1.575901
n _F'	1.576482
n _g	1.581468
n _h	1.586111
n _i	1.594018
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8080
P_C,A'	0.3452
P_d,C	0.3032
P_e,C	0.5414
P_g,d	1.2452
P_g,F	0.5485
P_h,g	0.4574
P_i,g	1.2365
P_C',t	0.8562
P_e,C'	0.4932
P_F',e	0.5158
P_i,F'	1.7277

transmittance: 5 mm
τ_1.55	0.997
τ_1.5	0.997
τ_1.4	0.994
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	0.998
τ_0.65	0.998
τ_0.6	0.998
τ_0.55	0.998
τ_0.5	0.998
τ_0.48	0.997
τ_0.46	0.996
τ_0.44	0.995
τ_0.42	0.995
τ_0.4	0.993
τ_0.39	0.99
τ_0.38	0.984
τ_0.37	0.977
τ_0.36	0.959
τ_0.35	0.927
τ_0.34	0.87
τ_0.33	0.77
τ_0.32	0.62
τ_0.31	0.43
τ_0.3	0.24
τ_0.29	0.1
τ_0.28	0.06

transmittance: 10 mm
τ_1.55	0.995
τ_1.5	0.995
τ_1.4	0.987
τ_1.3	0.998
τ_1.2	0.998
τ_1.1	0.998
τ_1.06	0.998
τ_1.05	0.998
τ₁	0.998
τ_0.95	0.998
τ_0.9	0.998
τ_0.85	0.998
τ_0.83	0.998
τ_0.8	0.998
τ_0.78	0.998
τ_0.75	0.997
τ_0.7	0.997
τ_0.65	0.996
τ_0.6	0.996
τ_0.55	0.997
τ_0.5	0.996
τ_0.48	0.995
τ_0.46	0.993
τ_0.44	0.991
τ_0.42	0.99
τ_0.4	0.985
τ_0.39	0.98
τ_0.38	0.968
τ_0.37	0.954
τ_0.36	0.92
τ_0.35	0.859
τ_0.34	0.75
τ_0.33	0.59
τ_0.32	0.39
τ_0.31	0.18
τ_0.3	0.06
τ_0.29	0.01

Poisson coef.: 0.253
Rigidity: 322 Pa*10⁸
Young module: 806 Pa*10⁸
Knoop hardness: 615
Optical stress coef.: 3.22 1/Pa*10¹²
Abrasion: 95

Staining: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	54
100 ~ 300	65

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.5
-20 ~ 0		4.9
0 ~ 20		5.3
20 ~ 40		5.7
40 ~ 60		6.1
60 ~ 80		6.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		6.6
-20 ~ 0		6.7
0 ~ 20		6.8
20 ~ 40		7
40 ~ 60		7.3
60 ~ 80		7.5