LAF3 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.717000 n_e = 1.720558	V_d = 47.98 V_e = 47.72	n_F - n_C = 0.014943 n_F' - n_C' = 0.015098	Coloring: 0.32 - 0.37 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.8789799 C2 = -0.008729237 C3 = 0.024425656 C4 = 0.000045491773 C5 = 0.000042802928 C6 = -0.00000072834306

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.701130
n _s	1.704839
n _r	1.709991
n _C	1.712510
n _C'	1.713220
n _0.6328	1.713885
n _D	1.716867
n _d	1.717000
n _e	1.720558
n _F	1.727453
n _F'	1.728318
n _g	1.735758
n _h	1.742742
n _i	1.754848
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7615
P_C,A'	0.3353
P_d,C	0.3004
P_e,C	0.5385
P_g,d	1.2552
P_g,F	0.5557
P_h,g	0.4673
P_i,g	1.2774
P_C',t	0.8090
P_e,C'	0.4910
P_F',e	0.5192
P_i,F'	1.7753

transmittance: 5 mm
τ_1.55	0.998
τ_1.5	0.998
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	0.998
τ_0.95	0.999
τ_0.9	0.998
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	0.998
τ_0.46	0.996
τ_0.44	0.994
τ_0.42	0.993
τ_0.4	0.988
τ_0.39	0.982
τ_0.38	0.971
τ_0.37	0.95
τ_0.36	0.91
τ_0.35	0.83
τ_0.34	0.68
τ_0.33	0.43
τ_0.32	0.16

transmittance: 10 mm
τ_1.55	0.995
τ_1.5	0.995
τ_1.4	0.996
τ_1.3	0.997
τ_1.2	0.998
τ_1.1	0.997
τ_1.06	0.997
τ_1.05	0.997
τ₁	0.997
τ_0.95	0.997
τ_0.9	0.997
τ_0.85	0.997
τ_0.83	0.997
τ_0.8	0.996
τ_0.78	0.997
τ_0.75	0.997
τ_0.7	0.999
τ_0.65	0.997
τ_0.6	0.997
τ_0.55	0.997
τ_0.5	0.997
τ_0.48	0.996
τ_0.46	0.991
τ_0.44	0.987
τ_0.42	0.986
τ_0.4	0.975
τ_0.39	0.965
τ_0.38	0.943
τ_0.37	0.9
τ_0.36	0.82
τ_0.35	0.68
τ_0.34	0.46
τ_0.33	0.19
τ_0.32	0.02

Poisson coef.: 0.288
Rigidity: 366 Pa*10⁸
Young module: 942 Pa*10⁸
Knoop hardness: 555
Optical stress coef.: 2.71 1/Pa*10¹²
Abrasion: 180

Staining: 2
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	80
100 ~ 300	95

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.7
-20 ~ 0		-0.5
0 ~ 20		-0.3
20 ~ 40		-0.1
40 ~ 60		0.1
60 ~ 80		0.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1.6
-20 ~ 0		1.5
0 ~ 20		1.4
20 ~ 40		1.4
40 ~ 60		1.4
60 ~ 80		1.5