BAL 3 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.571351 n_e = 1.573919	V_d = 52.96 V_e = 52.66	n_F - n_C = 0.010786 n_F' - n_C' = 0.010897	Coloring: 0.31 - 0.35 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.4261745 C2 = -0.0078153898 C3 = 0.01476624 C4 = 0.00036690418 C5 = -0.000010526893 C6 = 0.0000010393686

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.559756
n _s	1.562532
n _r	1.566288
n _C	1.568110
n _C'	1.568623
n _0.6328	1.569103
n _D	1.571255
n _d	1.571351
n _e	1.573919
n _F	1.578896
n _F'	1.579520
n _g	1.584884
n _h	1.589906
n _i	1.598586
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7744
P_C,A'	0.3365
P_d,C	0.3004
P_e,C	0.5385
P_g,d	1.2546
P_g,F	0.5550
P_h,g	0.4656
P_i,g	1.2702
P_C',t	0.8220
P_e,C'	0.4910
P_F',e	0.5192
P_i,F'	1.7674

transmittance: 10 mm
τ_0.35	0.916
τ_0.36	0.956
τ_0.37	0.976
τ_0.38	0.982
τ_0.39	0.987
τ_0.4	0.993
τ_0.42	0.993
τ_0.44	0.993
τ_0.46	0.994
τ_0.48	0.995
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.995
τ_0.7	0.996
τ_0.8	0.996
τ_0.9	0.995

Poisson coef.: 0.257
Rigidity: 274 Pa*10⁸
Young module: 688 Pa*10⁸
Knoop hardness: 450
Abrasion: 177

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	97
100 ~ 300	118

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	-0.7
-20 ~ 0	t	-0.8
0 ~ 20	t	-0.8
20 ~ 40	t	-0.8
40 ~ 60	t	-0.8
60 ~ 80	t	-0.6
-40 ~ -20	C'	-0.4
-20 ~ 0	C'	-0.4
0 ~ 20	C'	-0.4
20 ~ 40	C'	-0.3
40 ~ 60	C'	-0.1
-40 ~ -20		-0.4
-20 ~ 0		-0.4
0 ~ 20		-0.4
20 ~ 40		-0.2
40 ~ 60		-0.1
-40 ~ -20	D	-0.3
-20 ~ 0	D	-0.3
0 ~ 20	D	-0.2
20 ~ 40	D	-0.1
40 ~ 60	D	0.1
60 ~ 80	D	0.3
-40 ~ -20	e	-0.1
-20 ~ 0	e	-0.1
20 ~ 40	e	0.1
40 ~ 60	e	0.3
60 ~ 80	e	0.5
-40 ~ -20	F	0.3
-20 ~ 0	F	0.3
0 ~ 20	F	0.4
20 ~ 40	F	0.6
40 ~ 60	F	0.7
60 ~ 80	F	1
-40 ~ -20	g	0.7
-20 ~ 0	g	0.8
0 ~ 20	g	0.9
20 ~ 40	g	1
40 ~ 60	g	1.2
60 ~ 80	g	1.4