BAH26 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.667550 n_e = 1.671329	V_d = 41.92 V_e = 41.63	n_F - n_C = 0.015921 n_F' - n_C' = 0.016124	Coloring: 0.35 - 0.40 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.7137156 C2 = -0.0093481462 C3 = 0.022190744 C4 = 0.00074154999 C5 = -0.000021872211 C6 = 0.000003821015

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.651172
n _s	1.654948
n _r	1.660230
n _C	1.662843
n _C'	1.663583
n _0.6328	1.664278
n _D	1.667411
n _d	1.667550
n _e	1.671329
n _F	1.678764
n _F'	1.679707
n _g	1.687915
n _h	1.695786
n _i	1.709875
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7329
P_C,A'	0.3251
P_d,C	0.2956
P_e,C	0.5330
P_g,d	1.2790
P_g,F	0.5747
P_h,g	0.4943
P_i,g	1.3792
P_C',t	0.7794
P_e,C'	0.4865
P_F',e	0.5262
P_i,F'	1.8947

transmittance: 10 mm
τ_0.4	0.922
τ_0.42	0.966
τ_0.44	0.978
τ_0.46	0.985
τ_0.48	0.989
τ_0.5	0.993
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.: 0.266
Rigidity: 314 Pa*10⁸
Young module: 796 Pa*10⁸
Knoop hardness: 500
Abrasion: 185

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	75
100 ~ 300	88

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.5
-20 ~ 0	t	2.5
0 ~ 20	t	2.5
20 ~ 40	t	2.6
40 ~ 60	t	2.8
60 ~ 80	t	3
-40 ~ -20	C'	3.3
-20 ~ 0	C'	3.3
0 ~ 20	C'	3.4
20 ~ 40	C'	3.5
40 ~ 60	C'	3.7
60 ~ 80	C'	3.9
-40 ~ -20		3.3
-20 ~ 0		3.4
0 ~ 20		3.4
20 ~ 40		3.6
40 ~ 60		3.7
60 ~ 80		4
-40 ~ -20	D	3.6
-20 ~ 0	D	3.6
0 ~ 20	D	3.7
20 ~ 40	D	3.8
40 ~ 60	D	4
60 ~ 80	D	4.2
-40 ~ -20	e	3.9
-20 ~ 0	e	3.9
0 ~ 20	e	4
20 ~ 40	e	4.2
40 ~ 60	e	4.3
60 ~ 80	e	4.6
-40 ~ -20	F	4.6
-20 ~ 0	F	4.6
0 ~ 20	F	4.8
20 ~ 40	F	4.9
40 ~ 60	F	5.2
60 ~ 80	F	5.4
-40 ~ -20	g	5.2
-20 ~ 0	g	5.3
0 ~ 20	g	5.5
20 ~ 40	g	5.7
40 ~ 60	g	6
60 ~ 80	g	6.3