PBM28 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.688930 n_e = 1.694173	V_d = 31.08 V_e = 30.85	n_F - n_C = 0.022164 n_F' - n_C' = 0.022499	Coloring: 0.34 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.75779 C2 = -0.0087331797 C3 = 0.030379663 C4 = 0.0011503031 C5 = -0.000019167784 C6 = 0.0000074745415

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.667164
n _s	1.671959
n _r	1.678950
n _C	1.682481
n _C'	1.683488
n _0.6328	1.684436
n _D	1.688737
n _d	1.688930
n _e	1.694173
n _F	1.704645
n _F'	1.705988
n _g	1.717815
n _h	1.729398
n _i	1.750729
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6910
P_C,A'	0.3137
P_d,C	0.2909
P_e,C	0.5274
P_g,d	1.3032
P_g,F	0.5941
P_h,g	0.5226
P_i,g	1.4850
P_C',t	0.7365
P_e,C'	0.4820
P_F',e	0.5330
P_i,F'	2.0186

transmittance: 10 mm
τ_0.39	0.919
τ_0.4	0.945
τ_0.42	0.972
τ_0.44	0.984
τ_0.46	0.99
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.999

Poisson coef.: 0.231
Rigidity: 224 Pa*10⁸
Young module: 552 Pa*10⁸
Knoop hardness: 370
Abrasion: 167

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	86
100 ~ 300	94

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	4.6
-20 ~ 0	C'	4.8
0 ~ 20	C'	5
20 ~ 40	C'	5.3
40 ~ 60	C'	5.6
60 ~ 80	C'	5.9
-40 ~ -20	D	5.2
-20 ~ 0	D	5.4
0 ~ 20	D	5.6
20 ~ 40	D	5.9
40 ~ 60	D	6.1
60 ~ 80	D	6.5
-40 ~ -20	e	5.6
-20 ~ 0	e	5.8
0 ~ 20	e	6.1
20 ~ 40	e	6.4
40 ~ 60	e	6.7
60 ~ 80	e	7.1
-40 ~ -20	F	6.9
-20 ~ 0	F	7.1
0 ~ 20	F	7.4
20 ~ 40	F	7.8
40 ~ 60	F	8.2
60 ~ 80	F	8.6
-40 ~ -20	g	8.3
-20 ~ 0	g	8.6
0 ~ 20	g	8.9
20 ~ 40	g	9.4
40 ~ 60	g	9.8
60 ~ 80	g	10.3