TAF1 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.772500 n_e = 1.776208	V_d = 49.62 V_e = 49.39	n_F - n_C = 0.015566 n_F' - n_C' = 0.015715	Coloring: 0.30 - 0.37 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 3.0736378 C2 = -0.015501284 C3 = 0.023627699 C4 = 0.00066300852 C5 = -0.000028353438 C6 = 0.0000022090799

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.755358
n _s	1.759578
n _r	1.765135
n _C	1.767796
n _C'	1.768543
n _0.6328	1.769241
n _D	1.772361
n _d	1.772500
n _e	1.776208
n _F	1.783363
n _F'	1.784258
n _g	1.791930
n _h	1.799093
n _i	1.811430
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7989
P_C,A'	0.3419
P_d,C	0.3021
P_e,C	0.5403
P_g,d	1.2482
P_g,F	0.5503
P_h,g	0.4600
P_i,g	1.2526
P_C',t	0.8469
P_e,C'	0.4924
P_F',e	0.5170
P_i,F'	1.7455

transmittance: 5 mm
τ_1.55	0.996
τ_1.5	0.996
τ_1.4	0.999
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	0.998
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	0.999
τ_0.48	0.999
τ_0.46	0.998
τ_0.44	0.995
τ_0.42	0.993
τ_0.4	0.991
τ_0.39	0.987
τ_0.38	0.982
τ_0.37	0.973
τ_0.36	0.956
τ_0.35	0.93
τ_0.34	0.889
τ_0.33	0.82
τ_0.32	0.69
τ_0.31	0.441
τ_0.3	0.151
τ_0.29	0.019

transmittance: 10 mm
τ_1.55	0.992
τ_1.5	0.993
τ_1.4	0.999
τ_1.3	0.999
τ_1.2	0.998
τ_1.1	0.998
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	0.998
τ_0.83	0.998
τ_0.8	0.996
τ_0.78	0.997
τ_0.75	0.998
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.999
τ_0.48	0.997
τ_0.46	0.996
τ_0.44	0.991
τ_0.42	0.987
τ_0.4	0.982
τ_0.39	0.974
τ_0.38	0.963
τ_0.37	0.946
τ_0.36	0.915
τ_0.35	0.865
τ_0.34	0.791
τ_0.33	0.673
τ_0.32	0.476
τ_0.31	0.195
τ_0.3	0.023

Poisson coef.: 0.277
Rigidity: 504 Pa*10⁸
Young module: 1288 Pa*10⁸
Knoop hardness: 750
Optical stress coef.: 1.49 1/Pa*10¹²
Abrasion: 60

Staining: 2
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	59
100 ~ 300	71

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		3.7
60 ~ 80		4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		4.8
-20 ~ 0		4.7
0 ~ 20		4.8
20 ~ 40		4.9
40 ~ 60		5
60 ~ 80		5.2