PBM 4 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.616588 n_e = 1.620577	V_d = 36.63 V_e = 36.36	n_F - n_C = 0.016831 n_F' - n_C' = 0.017063	Coloring: 0.32 - 0.36 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5463724 C2 = -0.0093446264 C3 = 0.021462247 C4 = 0.001051989 C5 = -0.000048504181 C6 = 0.0000056183745

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.599560
n _s	1.603444
n _r	1.608920
n _C	1.611647
n _C'	1.612421
n _0.6328	1.613149
n _D	1.616441
n _d	1.616588
n _e	1.620577
n _F	1.628478
n _F'	1.629485
n _g	1.638285
n _h	1.646788
n _i	1.662165
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7180
P_C,A'	0.3203
P_d,C	0.2935
P_e,C	0.5305
P_g,d	1.2890
P_g,F	0.5826
P_h,g	0.5052
P_i,g	1.4187
P_C',t	0.7640
P_e,C'	0.4845
P_F',e	0.5292
P_i,F'	1.9416

transmittance: 10 mm
τ_0.36	0.91
τ_0.37	0.949
τ_0.38	0.965
τ_0.39	0.984
τ_0.4	0.99
τ_0.42	0.992
τ_0.44	0.992
τ_0.46	0.993
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.998

Poisson coef.: 0.223
Rigidity: 232 Pa*10⁸
Young module: 567 Pa*10⁸
Knoop hardness: 400
Abrasion: 160

Climatic resistance: 1
Resistance to acids: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	86
100 ~ 300	95

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2
-20 ~ 0	t	2.1
0 ~ 20	t	2.2
20 ~ 40	t	2.6
40 ~ 60	t	2.9
60 ~ 80	t	3.2
-40 ~ -20	C'	2.8
-20 ~ 0	C'	2.7
0 ~ 20	C'	2.8
20 ~ 40	C'	3.3
40 ~ 60	C'	3.6
60 ~ 80	C'	3.7
-40 ~ -20		2.9
-20 ~ 0		2.8
0 ~ 20		2.9
20 ~ 40		3.4
40 ~ 60		3.7
60 ~ 80		3.8
-40 ~ -20	D	3.2
-20 ~ 0	D	3.1
0 ~ 20	D	3.2
20 ~ 40	D	3.7
40 ~ 60	D	4
60 ~ 80	D	4.1
-40 ~ -20	e	3.4
-20 ~ 0	e	3.3
0 ~ 20	e	3.4
20 ~ 40	e	4.1
40 ~ 60	e	4.4
60 ~ 80	e	4.4
-40 ~ -20	F	4.3
-20 ~ 0	F	4.2
0 ~ 20	F	4.4
20 ~ 40	F	4.9
40 ~ 60	F	5.3
60 ~ 80	F	5.4
-40 ~ -20	g	5.2
-20 ~ 0	g	5.1
0 ~ 20	g	5.2
20 ~ 40	g	5.8
40 ~ 60	g	6.3
60 ~ 80	g	6.3