BAH27 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.701536 n_e = 1.705571	V_d = 41.24 V_e = 40.95	n_F - n_C = 0.017010 n_F' - n_C' = 0.017229	Coloring: 0.36 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8231508 C2 = -0.010908589 C3 = 0.02374898 C4 = 0.00090164601 C5 = -0.000037131711 C6 = 0.0000054818905

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.684000
n _s	1.688067
n _r	1.693721
n _C	1.696510
n _C'	1.697300
n _0.6328	1.698042
n _D	1.701387
n _d	1.701536
n _e	1.705571
n _F	1.713520
n _F'	1.714530
n _g	1.723336
n _h	1.731818
n _i	1.747121
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7354
P_C,A'	0.3251
P_d,C	0.2954
P_e,C	0.5326
P_g,d	1.2815
P_g,F	0.5770
P_h,g	0.4986
P_i,g	1.3983
P_C',t	0.7819
P_e,C'	0.4861
P_F',e	0.5267
P_i,F'	1.9159

transmittance: 10 mm
τ_0.42	0.954
τ_0.44	0.972
τ_0.46	0.981
τ_0.48	0.987
τ_0.5	0.992
τ_0.55	0.996
τ_0.6	0.995
τ_0.65	0.994
τ_0.7	0.996
τ_0.8	0.997
τ_0.9	0.997

Poisson coef.: 0.275
Rigidity: 332 Pa*10⁸
Young module: 847 Pa*10⁸
Knoop hardness: 500
Abrasion: 184

Climatic resistance: 3
Resistance to acids: 52.2
Phosphate resistance: 3.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	75
100 ~ 300	85

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	1.7
-20 ~ 0	t	1.7
0 ~ 20	t	1.9
20 ~ 40	t	2
40 ~ 60	t	2.2
60 ~ 80	t	2.5
-40 ~ -20	C'	2.2
-20 ~ 0	C'	2.3
0 ~ 20	C'	2.4
20 ~ 40	C'	2.6
40 ~ 60	C'	2.9
60 ~ 80	C'	3.1
-40 ~ -20		2.2
-20 ~ 0		2.3
0 ~ 20		2.5
20 ~ 40		2.7
40 ~ 60		2.9
60 ~ 80		3.2
-40 ~ -20	D	2.4
-20 ~ 0	D	2.5
0 ~ 20	D	2.6
20 ~ 40	D	2.9
40 ~ 60	D	3.1
60 ~ 80	D	3.4
-40 ~ -20	e	2.7
-20 ~ 0	e	2.8
0 ~ 20	e	3
20 ~ 40	e	3.2
40 ~ 60	e	3.5
60 ~ 80	e	3.8
-40 ~ -20	F	3.3
-20 ~ 0	F	3.4
0 ~ 20	F	3.6
20 ~ 40	F	3.9
40 ~ 60	F	4.2
60 ~ 80	F	4.4
-40 ~ -20	g	4
-20 ~ 0	g	4.2
0 ~ 20	g	4.5
20 ~ 40	g	4.7
40 ~ 60	g	5.1
60 ~ 80	g	5.4