PBM 3 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.612928 n_e = 1.616855	V_d = 36.99 V_e = 36.73	n_F - n_C = 0.016568 n_F' - n_C' = 0.016792	Coloring: 0.32 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.32567543 C2 = 0.208112474 C3 = 1.15985207 C4 = 0.00973013804 C5 = 0.046285933 C6 = 137.559854

Refraction index
n _2.3254	-----
n _1.9701	1.583021
n _1.5296	1.588538
n _1.06	1.595229
n _t	1.596098
n _s	1.599940
n _r	1.605362
n _C	1.608056
n _C'	1.608820
n _0.6328	1.609539
n _D	1.612783
n _d	1.612928
n _e	1.616855
n _F	1.624624
n _F'	1.625613
n _g	1.634260
n _h	1.642608
n _i	1.657675
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7217
P_C,A'	0.3217
P_d,C	0.2940
P_e,C	0.5310
P_g,d	1.2874
P_g,F	0.5815
P_h,g	0.5038
P_i,g	1.4132
P_C',t	0.7678
P_e,C'	0.4849
P_F',e	0.5285
P_i,F'	1.9351

transmittance: 10 mm
τ_0.32	0.05
τ_0.33	0.44
τ_0.34	0.79
τ_0.35	0.925
τ_0.36	0.969
τ_0.37	0.984
τ_0.38	0.989
τ_0.39	0.993
τ_0.4	0.995
τ_0.42	0.998
τ_0.44	0.997
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	0.999
τ_1.2	0.998
τ_1.4	0.996
τ_1.6	0.995
τ_1.8	0.984
τ₂	0.969
τ_2.2	0.936
τ_2.4	0.917

Poisson coef.: 0.22
Rigidity: 235 Pa*10⁸
Young module: 572 Pa*10⁸
Knoop hardness: 410
Abrasion: 150

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	83
100 ~ 300	95

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.5
-20 ~ 0	t	2.6
0 ~ 20	t	2.7
20 ~ 40	t	2.9
40 ~ 60	t	3
60 ~ 80	t	3.1
-40 ~ -20	C'	3.1
-20 ~ 0	C'	3.2
0 ~ 20	C'	3.4
20 ~ 40	C'	3.6
40 ~ 60	C'	3.8
60 ~ 80	C'	3.9
-40 ~ -20		3.1
-20 ~ 0		3.3
0 ~ 20		3.5
20 ~ 40		3.7
40 ~ 60		3.8
60 ~ 80		4
-40 ~ -20	D	3.4
-20 ~ 0	D	3.6
0 ~ 20	D	3.7
20 ~ 40	D	3.9
40 ~ 60	D	4.1
60 ~ 80	D	4.3
-40 ~ -20	e	3.7
-20 ~ 0	e	3.9
0 ~ 20	e	4.1
20 ~ 40	e	4.3
40 ~ 60	e	4.5
60 ~ 80	e	4.7
-40 ~ -20	F	4.5
-20 ~ 0	F	4.7
0 ~ 20	F	4.9
20 ~ 40	F	5.2
40 ~ 60	F	5.4
60 ~ 80	F	5.6
-40 ~ -20	g	5.3
-20 ~ 0	g	5.6
0 ~ 20	g	5.8
20 ~ 40	g	6.1
40 ~ 60	g	6.4
60 ~ 80	g	6.6