BACD18 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

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Main parameters
n_d = 1.638542 n_e = 1.641287	V_d = 55.44 V_e = 55.18	n_F - n_C = 0.011515 n_F' - n_C' = 0.011620	Coloring: 0.32 - 0.36 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.6365277 C2 = -0.0097558464 C3 = 0.017143665 C4 = 0.00022592497 C5 = 0.0000030855342 C6 = 0.00000045831917

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.625850
n _s	1.628954
n _r	1.633077
n _C	1.635053
n _C'	1.635607
n _0.6328	1.636126
n _D	1.638440
n _d	1.638542
n _e	1.641287
n _F	1.646569
n _F'	1.647228
n _g	1.652873
n _h	1.658129
n _i	1.667148
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7992
P_C,A'	0.3432
P_d,C	0.3029
P_e,C	0.5413
P_g,d	1.2444
P_g,F	0.5474
P_h,g	0.4563
P_i,g	1.2396
P_C',t	0.8473
P_e,C'	0.4932
P_F',e	0.5159
P_i,F'	1.7298

transmittance: 5 mm
τ_1.55	0.996
τ_1.5	0.996
τ_1.4	0.995
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	0.999
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	0.995
τ_0.46	0.994
τ_0.44	0.992
τ_0.42	0.992
τ_0.4	0.987
τ_0.39	0.981
τ_0.38	0.969
τ_0.37	0.947
τ_0.36	0.91
τ_0.35	0.83
τ_0.34	0.7
τ_0.33	0.48
τ_0.32	0.19

transmittance: 10 mm
τ_1.55	0.992
τ_1.5	0.992
τ_1.4	0.99
τ_1.3	0.997
τ_1.2	0.997
τ_1.1	0.996
τ_1.06	0.996
τ_1.05	0.996
τ₁	0.996
τ_0.95	0.997
τ_0.9	0.997
τ_0.85	0.997
τ_0.83	0.997
τ_0.8	0.998
τ_0.78	0.998
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	0.995
τ_0.48	0.991
τ_0.46	0.988
τ_0.44	0.985
τ_0.42	0.984
τ_0.4	0.974
τ_0.39	0.962
τ_0.38	0.939
τ_0.37	0.9
τ_0.36	0.82
τ_0.35	0.69
τ_0.34	0.49
τ_0.33	0.23
τ_0.32	0.04

Poisson coef.: 0.281
Rigidity: 319 Pa*10⁸
Young module: 817 Pa*10⁸
Knoop hardness: 590
Optical stress coef.: 1.77 1/Pa*10¹²
Abrasion: 150

Staining: 4
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	69
100 ~ 300	80

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.1
-20 ~ 0		0.4
0 ~ 20		0.7
20 ~ 40		1
40 ~ 60		1.3
60 ~ 80		1.5

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.3
-20 ~ 0		2.3
0 ~ 20		2.4
20 ~ 40		2.4
40 ~ 60		2.6
60 ~ 80		2.7