LAC12 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.677901 n_e = 1.680813	V_d = 55.51 V_e = 55.26	n_F - n_C = 0.012210 n_F' - n_C' = 0.012318	Coloring: 0.31 - 0.37 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.7634844 C2 = -0.011068339 C3 = 0.018246442 C4 = 0.00037697356 C5 = -0.000017788655 C6 = 0.0000015314262

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.664389
n _s	1.667708
n _r	1.672096
n _C	1.674197
n _C'	1.674786
n _0.6328	1.675336
n _D	1.677793
n _d	1.677901
n _e	1.680813
n _F	1.686407
n _F'	1.687104
n _g	1.693064
n _h	1.698599
n _i	1.708078
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8032
P_C,A'	0.3442
P_d,C	0.3034
P_e,C	0.5418
P_g,d	1.2418
P_g,F	0.5452
P_h,g	0.4532
P_i,g	1.2295
P_C',t	0.8514
P_e,C'	0.4936
P_F',e	0.5152
P_i,F'	1.7177

transmittance: 5 mm
τ_1.55	0.996
τ_1.5	0.997
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	0.998
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	0.999
τ_0.48	0.997
τ_0.46	0.997
τ_0.44	0.994
τ_0.42	0.993
τ_0.4	0.99
τ_0.39	0.975
τ_0.38	0.958
τ_0.37	0.93
τ_0.36	0.87
τ_0.35	0.77
τ_0.34	0.64
τ_0.33	0.47
τ_0.32	0.3
τ_0.31	0.17
τ_0.3	0.09
τ_0.29	0.04

transmittance: 10 mm
τ_1.55	0.993
τ_1.5	0.993
τ_1.4	0.994
τ_1.3	0.998
τ_1.2	0.998
τ_1.1	0.998
τ_1.06	0.998
τ_1.05	0.997
τ₁	0.997
τ_0.95	0.997
τ_0.9	0.997
τ_0.85	0.998
τ_0.83	0.998
τ_0.8	0.998
τ_0.78	0.998
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	0.994
τ_0.46	0.994
τ_0.44	0.989
τ_0.42	0.986
τ_0.4	0.98
τ_0.39	0.951
τ_0.38	0.917
τ_0.37	0.86
τ_0.36	0.76
τ_0.35	0.6
τ_0.34	0.41
τ_0.33	0.22
τ_0.32	0.09
τ_0.31	0.03
τ_0.3	0.01

Poisson coef.: 0.292
Rigidity: 364 Pa*10⁸
Young module: 939 Pa*10⁸
Knoop hardness: 590
Optical stress coef.: 1.6 1/Pa*10¹²
Abrasion: 150

Staining: 5
Resistance to acids: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	77
100 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-1.3
-20 ~ 0		-1.1
0 ~ 20		-0.8
20 ~ 40		-0.6
40 ~ 60		-0.4
60 ~ 80		-0.2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		1
-20 ~ 0		0.8
0 ~ 20		0.9
20 ~ 40		0.9
40 ~ 60		0.9
60 ~ 80		0.9