M-LAF81 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.730765 n_e = 1.735049	V_d = 40.50 V_e = 40.24	n_F - n_C = 0.018043 n_F' - n_C' = 0.018262	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.9167886 C2 = -0.012398199 C3 = 0.026675237 C4 = 0.00065190504 C5 = 0.0000046956175 C6 = 0.000002691054

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.711902
n _s	1.716328
n _r	1.722421
n _C	1.725408
n _C'	1.726252
n _0.6328	1.727044
n _D	1.730607
n _d	1.730765
n _e	1.735049
n _F	1.743451
n _F'	1.744515
n _g	1.753763
n _h	1.762608
n _i	1.778368
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7485
P_C,A'	0.3288
P_d,C	0.2968
P_e,C	0.5342
P_g,d	1.2745
P_g,F	0.5714
P_h,g	0.4902
P_i,g	1.3637
P_C',t	0.7953
P_e,C'	0.4875
P_F',e	0.5246
P_i,F'	1.8762

transmittance: 5 mm
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	0.993
τ_0.44	0.989
τ_0.42	0.985
τ_0.4	0.973
τ_0.39	0.96
τ_0.38	0.94
τ_0.37	0.91
τ_0.36	0.85
τ_0.35	0.67
τ_0.34	0.34
τ_0.33	0.06

transmittance: 10 mm
τ_0.7	0.996
τ_0.65	0.996
τ_0.6	0.996
τ_0.55	0.995
τ_0.5	0.993
τ_0.48	0.99
τ_0.46	0.985
τ_0.44	0.979
τ_0.42	0.97
τ_0.4	0.947
τ_0.39	0.922
τ_0.38	0.88
τ_0.37	0.83
τ_0.36	0.71
τ_0.35	0.45
τ_0.34	0.11

Poisson coef.: 0.287
Rigidity: 431 Pa*10⁸
Young module: 1110 Pa*10⁸
Knoop hardness: 545
Optical stress coef.: 2.03 1/Pa*10¹²
Abrasion: 120

Staining: 5
Resistance to acids: 3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	89
100 ~ 300	108

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.2
-20 ~ 0		0.5
0 ~ 20		0.8
20 ~ 40		1
40 ~ 60		1.2
60 ~ 80		1.4

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.5
-20 ~ 0		2.5
0 ~ 20		2.5
20 ~ 40		2.5
40 ~ 60		2.5
60 ~ 80		2.6