PBM25 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.672700 n_e = 1.677658	V_d = 32.10 V_e = 31.86	n_F - n_C = 0.020955 n_F' - n_C' = 0.021268	Coloring: 0.34 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.7107551 C2 = -0.0092889162 C3 = 0.027542314 C4 = 0.0013512557 C5 = -0.000054563909 C6 = 0.0000083261074

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.652037
n _s	1.656621
n _r	1.663253
n _C	1.666597
n _C'	1.667550
n _0.6328	1.668447
n _D	1.672517
n _d	1.672700
n _e	1.677658
n _F	1.687552
n _F'	1.688819
n _g	1.699962
n _h	1.710843
n _i	1.730811
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6947
P_C,A'	0.3144
P_d,C	0.2912
P_e,C	0.5278
P_g,d	1.3009
P_g,F	0.5921
P_h,g	0.5192
P_i,g	1.4721
P_C',t	0.7402
P_e,C'	0.4823
P_F',e	0.5325
P_i,F'	2.0038

transmittance: 10 mm
τ_0.38	0.903
τ_0.39	0.939
τ_0.4	0.959
τ_0.42	0.979
τ_0.44	0.986
τ_0.46	0.991
τ_0.48	0.994
τ_0.5	0.995
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.999

Poisson coef.: 0.23
Rigidity: 223 Pa*10⁸
Young module: 549 Pa*10⁸
Knoop hardness: 390
Abrasion: 152

Climatic resistance: 1
Resistance to acids: 2.2
Phosphate resistance: 2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	85
100 ~ 300	95

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3.1
-20 ~ 0	t	3
0 ~ 20	t	3.3
20 ~ 40	t	3.5
40 ~ 60	t	3.9
60 ~ 80	t	4.4
-40 ~ -20	C'	3.7
-20 ~ 0	C'	3.9
0 ~ 20	C'	4.2
20 ~ 40	C'	4.5
40 ~ 60	C'	4.8
60 ~ 80	C'	5.2
-40 ~ -20		3.7
-20 ~ 0		3.9
0 ~ 20		4.3
20 ~ 40		4.6
40 ~ 60		4.9
60 ~ 80		5.3
-40 ~ -20	D	3.9
-20 ~ 0	D	4.3
0 ~ 20	D	4.7
20 ~ 40	D	5
40 ~ 60	D	5.4
60 ~ 80	D	5.7
-40 ~ -20	e	4.3
-20 ~ 0	e	4.8
0 ~ 20	e	5.2
20 ~ 40	e	5.6
40 ~ 60	e	6
60 ~ 80	e	6.3
-40 ~ -20	F	5.3
-20 ~ 0	F	6.1
0 ~ 20	F	6.5
20 ~ 40	F	6.9
40 ~ 60	F	7.2
60 ~ 80	F	7.5
-40 ~ -20	g	6.6
-20 ~ 0	g	7.3
0 ~ 20	g	7.8
20 ~ 40	g	8.2
40 ~ 60	g	8.6
60 ~ 80	g	9