BAH28 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.723420 n_e = 1.727937	V_d = 37.94 V_e = 37.66	n_F - n_C = 0.019062 n_F' - n_C' = 0.019326	Coloring: 0.37 - 0.41 mkm.

Type: Schott
Spectral range: 0.4046561 - 1.01398 mkm.
C1 = 2.8917043 C2 = -0.012848033 C3 = 0.024505391 C4 = 0.0016741172 C5 = -0.00011761633 C6 = 0.00001046904

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.704058
n _s	1.708517
n _r	1.714737
n _C	1.717825
n _C'	1.718702
n _0.6328	1.719526
n _D	1.723253
n _d	1.723420
n _e	1.727937
n _F	1.736888
n _F'	1.738029
n _g	1.748013
n _h	1.757687
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7222
P_C,A'	0.3205
P_d,C	0.2934
P_e,C	0.5304
P_g,d	1.2901
P_g,F	0.5835
P_h,g	0.5074
P_i,g	-----
P_C',t	0.7682
P_e,C'	0.4844
P_F',e	0.5294
P_i,F'	-----

transmittance: 10 mm
τ_0.42	0.945
τ_0.44	0.968
τ_0.46	0.978
τ_0.48	0.985
τ_0.5	0.989
τ_0.55	0.994
τ_0.6	0.993
τ_0.65	0.993
τ_0.7	0.995
τ_0.8	0.997
τ_0.9	0.997

Poisson coef.: 0.279
Rigidity: 345 Pa*10⁸
Young module: 883 Pa*10⁸
Knoop hardness: 520
Abrasion: 165

Climatic resistance: 3
Resistance to acids: 52.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	74
100 ~ 300	84

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.7
-20 ~ 0	t	2.7
0 ~ 20	t	2.8
20 ~ 40	t	3
40 ~ 60	t	3.2
60 ~ 80	t	3.4
-40 ~ -20	C'	3.5
-20 ~ 0	C'	3.6
0 ~ 20	C'	3.8
20 ~ 40	C'	4
40 ~ 60	C'	4.3
60 ~ 80	C'	4.6
-40 ~ -20		3.6
-20 ~ 0		3.7
0 ~ 20		3.8
20 ~ 40		4.1
40 ~ 60		4.4
60 ~ 80		4.7
-40 ~ -20	D	3.8
-20 ~ 0	D	3.9
0 ~ 20	D	4.1
20 ~ 40	D	4.4
40 ~ 60	D	4.7
60 ~ 80	D	5
-40 ~ -20	e	4.1
-20 ~ 0	e	4.3
0 ~ 20	e	4.5
20 ~ 40	e	4.8
40 ~ 60	e	5.1
60 ~ 80	e	5.4
-40 ~ -20	F	4.9
-20 ~ 0	F	5.1
0 ~ 20	F	5.4
20 ~ 40	F	5.7
40 ~ 60	F	6
60 ~ 80	F	6.4
-40 ~ -20	g	5.8
-20 ~ 0	g	6
0 ~ 20	g	6.3
20 ~ 40	g	6.7
40 ~ 60	g	7.1
60 ~ 80	g	7.5