E-BACED20 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

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Main parameters
n_d = 1.648499 n_e = 1.651413	V_d = 53.03 V_e = 52.74	n_F - n_C = 0.012228 n_F' - n_C' = 0.012350	Coloring: 0.30 - 0.36 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.6667537 C2 = -0.0097319259 C3 = 0.017436284 C4 = 0.00047558015 C5 = -0.000017144989 C6 = 0.0000011049589

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.635280
n _s	1.638463
n _r	1.642746
n _C	1.644818
n _C'	1.645401
n _0.6328	1.645947
n _D	1.648391
n _d	1.648499
n _e	1.651413
n _F	1.657047
n _F'	1.657752
n _g	1.663798
n _h	1.669434
n _i	1.679098
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7799
P_C,A'	0.3379
P_d,C	0.3010
P_e,C	0.5392
P_g,d	1.2510
P_g,F	0.5521
P_h,g	0.4608
P_i,g	1.2511
P_C',t	0.8276
P_e,C'	0.4916
P_F',e	0.5183
P_i,F'	1.7456

transmittance: 5 mm
τ_1.55	0.998
τ_1.5	0.998
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	0.999
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.998
τ_0.48	0.998
τ_0.46	0.997
τ_0.44	0.996
τ_0.42	0.995
τ_0.4	0.992
τ_0.39	0.989
τ_0.38	0.983
τ_0.37	0.972
τ_0.36	0.95
τ_0.35	0.91
τ_0.34	0.84
τ_0.33	0.73
τ_0.32	0.57
τ_0.31	0.38
τ_0.3	0.19
τ_0.29	0.07
τ_0.28	0.02

transmittance: 10 mm
τ_1.55	0.995
τ_1.5	0.995
τ_1.4	0.994
τ_1.3	0.997
τ_1.2	0.997
τ_1.1	0.997
τ_1.06	0.997
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	0.997
τ_0.6	0.997
τ_0.55	0.997
τ_0.5	0.996
τ_0.48	0.995
τ_0.46	0.994
τ_0.44	0.992
τ_0.42	0.99
τ_0.4	0.984
τ_0.39	0.978
τ_0.38	0.966
τ_0.37	0.945
τ_0.36	0.903
τ_0.35	0.82
τ_0.34	0.7
τ_0.33	0.53
τ_0.32	0.32
τ_0.31	0.14
τ_0.3	0.04
τ_0.29	0.01

Knoop hardness: 580
Abrasion: 160

Staining: 2
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	70
100 ~ 300	78

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1
-20 ~ 0		1.3
0 ~ 20		1.6
20 ~ 40		1.9
40 ~ 60		2.2
60 ~ 80		2.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.2
-20 ~ 0		3.2
0 ~ 20		3.2
20 ~ 40		3.3
40 ~ 60		3.4
60 ~ 80		3.5