BAH78 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.723420 n_e = 1.727931	V_d = 38.03 V_e = 37.76	n_F - n_C = 0.019020 n_F' - n_C' = 0.019275	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8884392 C2 = -0.010882671 C3 = 0.026418653 C4 = 0.0011678492 C5 = -0.000052245897 C6 = 0.0000062881561

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.704114
n _s	1.708514
n _r	1.714730
n _C	1.717823
n _C'	1.718701
n _0.6328	1.719526
n _D	1.723254
n _d	1.723420
n _e	1.727931
n _F	1.736843
n _F'	1.737976
n _g	1.747863
n _h	1.757383
n _i	1.774521
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7207
P_C,A'	0.3216
P_d,C	0.2942
P_e,C	0.5314
P_g,d	1.2850
P_g,F	0.5793
P_h,g	0.5005
P_i,g	1.4015
P_C',t	0.7668
P_e,C'	0.4852
P_F',e	0.5281
P_i,F'	1.9213

transmittance: 10 mm
τ_0.39	0.937
τ_0.4	0.961
τ_0.42	0.981
τ_0.44	0.987
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998

Poisson coef.: 0.263
Rigidity: 338 Pa*10⁸
Young module: 854 Pa*10⁸
Knoop hardness: 490
Abrasion: 169

Climatic resistance: 2
Resistance to acids: 51.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	69
100 ~ 300	80

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	4.9
-20 ~ 0	t	4.8
0 ~ 20	t	4.8
20 ~ 40	t	4.9
40 ~ 60	t	5
60 ~ 80	t	5.3
-40 ~ -20	C'	5.7
-20 ~ 0	C'	5.7
0 ~ 20	C'	5.8
20 ~ 40	C'	6
40 ~ 60	C'	6.2
60 ~ 80	C'	6.5
-40 ~ -20		5.7
-20 ~ 0		5.8
0 ~ 20		5.9
20 ~ 40		6.1
40 ~ 60		6.3
60 ~ 80		6.6
-40 ~ -20	D	6
-20 ~ 0	D	6.1
0 ~ 20	D	6.2
20 ~ 40	D	6.4
40 ~ 60	D	6.6
60 ~ 80	D	6.9
-40 ~ -20	e	6.4
-20 ~ 0	e	6.5
0 ~ 20	e	6.6
20 ~ 40	e	6.8
40 ~ 60	e	7.1
60 ~ 80	e	7.3
-40 ~ -20	F	7.3
-20 ~ 0	F	7.4
0 ~ 20	F	7.6
20 ~ 40	F	7.8
40 ~ 60	F	8.1
60 ~ 80	F	8.3
-40 ~ -20	g	8.2
-20 ~ 0	g	8.4
0 ~ 20	g	8.6
20 ~ 40	g	9
40 ~ 60	g	9.3
60 ~ 80	g	9.7