PBM8Y - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.595509 n_e = 1.599107	V_d = 39.26 V_e = 38.99	n_F - n_C = 0.015168 n_F' - n_C' = 0.015364	Coloring: 0.32 - 0.34 mkm.

Type: Sellmeier
Spectral range: 0.326 - 2.325 mkm.
C1 = 1.35351322 C2 = 0.130212912 C3 = 0.158337266 C4 = 0.0105624626 C5 = 0.0496606652 C6 = 20.7965806

Refraction index
n _2.3254	-----
n _1.9701	1.566134
n _1.5296	1.572455
n _1.06	1.579097
n _t	1.579920
n _s	1.583520
n _r	1.588545
n _C	1.591030
n _C'	1.591734
n _0.6328	1.592394
n _D	1.595376
n _d	1.595509
n _e	1.599107
n _F	1.606198
n _F'	1.607098
n _g	1.614947
n _h	1.622491
n _i	1.636037
n _0.3341	1.651876
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7324
P_C,A'	0.3245
P_d,C	0.2952
P_e,C	0.5325
P_g,d	1.2814
P_g,F	0.5767
P_h,g	0.4973
P_i,g	1.3904
P_C',t	0.7788
P_e,C'	0.4861
P_F',e	0.5268
P_i,F'	1.9078

transmittance: 10 mm
τ_0.32	0.17
τ_0.33	0.65
τ_0.34	0.89
τ_0.35	0.966
τ_0.36	0.987
τ_0.365	0.991
τ_0.37	0.993
τ_0.38	0.996
τ_0.39	0.997
τ_0.4	0.998
τ_0.42	0.998
τ_0.44	0.998
τ_0.46	0.998
τ_0.48	0.999
τ_0.5	0.999
τ_0.55	0.999
τ_0.6	0.999
τ_0.65	0.999
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.995
τ_1.6	0.994
τ_1.8	0.981
τ₂	0.96
τ_2.2	0.916
τ_2.4	0.88

Poisson coef.: 0.222
Rigidity: 241 Pa*10⁸
Young module: 588 Pa*10⁸
Knoop hardness: 400
Abrasion: 151

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	85
100 ~ 300	96

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	1.9
-20 ~ 0	t	2
0 ~ 20	t	2.1
20 ~ 40	t	2.2
40 ~ 60	t	2.3
60 ~ 80	t	2.5
-40 ~ -20	C'	2.6
-20 ~ 0	C'	2.7
0 ~ 20	C'	2.9
20 ~ 40	C'	3
40 ~ 60	C'	3.1
60 ~ 80	C'	3.3
-40 ~ -20		2.7
-20 ~ 0		2.8
0 ~ 20		2.9
20 ~ 40		3
40 ~ 60		3.2
60 ~ 80		3.3
-40 ~ -20	D	2.9
-20 ~ 0	D	3
0 ~ 20	D	3.2
20 ~ 40	D	3.3
40 ~ 60	D	3.4
60 ~ 80	D	3.5
-40 ~ -20	e	3.2
-20 ~ 0	e	3.3
0 ~ 20	e	3.5
20 ~ 40	e	3.6
40 ~ 60	e	3.8
60 ~ 80	e	3.9
-40 ~ -20	F	3.8
-20 ~ 0	F	4
0 ~ 20	F	4.2
20 ~ 40	F	4.4
40 ~ 60	F	4.5
60 ~ 80	F	4.7
-40 ~ -20	g	4.6
-20 ~ 0	g	4.8
0 ~ 20	g	5
20 ~ 40	g	5.2
40 ~ 60	g	5.4
60 ~ 80	g	5.6
-40 ~ -20	i	6.8
-20 ~ 0	i	7.1
0 ~ 20	i	7.4
20 ~ 40	i	7.7
40 ~ 60	i	8
60 ~ 80	i	8.3