BPH 5 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.654114 n_e = 1.658026	V_d = 39.68 V_e = 39.45	n_F - n_C = 0.016481 n_F' - n_C' = 0.016678	Coloring: 0.33 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.44845677 C2 = 0.22044806 C3 = 0.99476362 C4 = 0.0092817361 C5 = 0.0433001987 C6 = 77.6475264

Refraction index
n _2.3254	-----
n _1.9701	1.619420
n _1.5296	1.627244
n _1.06	1.635603
n _t	1.636595
n _s	1.640807
n _r	1.646466
n _C	1.649211
n _C'	1.649985
n _0.6328	1.650710
n _D	1.653969
n _d	1.654114
n _e	1.658026
n _F	1.665693
n _F'	1.666663
n _g	1.675102
n _h	1.683178
n _i	1.697584
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7654
P_C,A'	0.3318
P_d,C	0.2974
P_e,C	0.5348
P_g,d	1.2733
P_g,F	0.5708
P_h,g	0.4900
P_i,g	1.3640
P_C',t	0.8124
P_e,C'	0.4878
P_F',e	0.5240
P_i,F'	1.8760

transmittance: 10 mm
τ_0.33	0.1
τ_0.34	0.31
τ_0.35	0.53
τ_0.36	0.7
τ_0.37	0.81
τ_0.38	0.89
τ_0.39	0.934
τ_0.4	0.958
τ_0.42	0.982
τ_0.44	0.99
τ_0.46	0.994
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.999
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.999
τ_1.4	0.968
τ_1.6	0.983
τ_1.8	0.97
τ₂	0.921
τ_2.2	0.73
τ_2.4	0.47

Poisson coef.: 0.275
Rigidity: 257 Pa*10⁸
Young module: 655 Pa*10⁸
Knoop hardness: 440
Abrasion: 117

Climatic resistance: 1
Resistance to acids: 52.2
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	46
100 ~ 300	57

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	5.3
-20 ~ 0	t	5.4
0 ~ 20	t	5.5
20 ~ 40	t	5.6
40 ~ 60	t	5.7
60 ~ 80	t	5.8
-40 ~ -20	C'	5.8
-20 ~ 0	C'	5.9
0 ~ 20	C'	6.1
20 ~ 40	C'	6.2
40 ~ 60	C'	6.4
60 ~ 80	C'	6.5
-40 ~ -20		5.8
-20 ~ 0		6
0 ~ 20		6.1
20 ~ 40		6.3
40 ~ 60		6.4
60 ~ 80		6.6
-40 ~ -20	D	6
-20 ~ 0	D	6.1
0 ~ 20	D	6.3
20 ~ 40	D	6.5
40 ~ 60	D	6.6
60 ~ 80	D	6.8
-40 ~ -20	e	6.2
-20 ~ 0	e	6.4
0 ~ 20	e	6.6
20 ~ 40	e	6.7
40 ~ 60	e	6.9
60 ~ 80	e	7.1
-40 ~ -20	F	6.8
-20 ~ 0	F	7
0 ~ 20	F	7.2
20 ~ 40	F	7.4
40 ~ 60	F	7.6
60 ~ 80	F	7.8
-40 ~ -20	g	7.4
-20 ~ 0	g	7.7
0 ~ 20	g	7.9
20 ~ 40	g	8.1
40 ~ 60	g	8.3
60 ~ 80	g	8.5