BAH77 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.701539 n_e = 1.705578	V_d = 41.21 V_e = 40.92	n_F - n_C = 0.017023 n_F' - n_C' = 0.017239	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8222929 C2 = -0.010636602 C3 = 0.024365241 C4 = 0.00070591145 C5 = -0.0000039506977 C6 = 0.0000029865625

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.683960
n _s	1.688036
n _r	1.693707
n _C	1.696504
n _C'	1.697296
n _0.6328	1.698039
n _D	1.701389
n _d	1.701539
n _e	1.705578
n _F	1.713527
n _F'	1.714536
n _g	1.723318
n _h	1.731742
n _i	1.746803
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7368
P_C,A'	0.3258
P_d,C	0.2957
P_e,C	0.5330
P_g,d	1.2793
P_g,F	0.5751
P_h,g	0.4948
P_i,g	1.3795
P_C',t	0.7833
P_e,C'	0.4865
P_F',e	0.5262
P_i,F'	1.8954

transmittance: 10 mm
τ_0.38	0.933
τ_0.39	0.959
τ_0.4	0.973
τ_0.42	0.984
τ_0.44	0.987
τ_0.46	0.99
τ_0.48	0.993
τ_0.5	0.995
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.998

Poisson coef.: 0.261
Rigidity: 334 Pa*10⁸
Young module: 843 Pa*10⁸
Knoop hardness: 510
Abrasion: 184

Climatic resistance: 3
Resistance to acids: 51.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	84

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.4
-20 ~ 0	t	2.4
0 ~ 20	t	2.5
20 ~ 40	t	2.7
40 ~ 60	t	2.8
60 ~ 80	t	3.1
-40 ~ -20	C'	3.3
-20 ~ 0	C'	3.3
0 ~ 20	C'	3.4
20 ~ 40	C'	3.6
40 ~ 60	C'	3.7
60 ~ 80	C'	4
-40 ~ -20		3.4
-20 ~ 0		3.4
0 ~ 20		3.5
20 ~ 40		3.6
40 ~ 60		3.8
60 ~ 80		4.1
-40 ~ -20	D	3.6
-20 ~ 0	D	3.6
0 ~ 20	D	3.8
20 ~ 40	D	3.9
40 ~ 60	D	4.1
60 ~ 80	D	4.4
-40 ~ -20	e	3.8
-20 ~ 0	e	3.9
0 ~ 20	e	4
20 ~ 40	e	4.2
40 ~ 60	e	4.4
60 ~ 80	e	4.6
-40 ~ -20	F	4.5
-20 ~ 0	F	4.6
0 ~ 20	F	4.8
20 ~ 40	F	5
40 ~ 60	F	5.2
60 ~ 80	F	5.5
-40 ~ -20	g	5.2
-20 ~ 0	g	5.4
0 ~ 20	g	5.6
20 ~ 40	g	5.8
40 ~ 60	g	6.1
60 ~ 80	g	6.4