BPM51 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.613396 n_e = 1.616690	V_d = 44.26 V_e = 44.03	n_F - n_C = 0.013856 n_F' - n_C' = 0.014004	Coloring: 0.31 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.37436455 C2 = 0.174025602 C3 = 0.905485504 C4 = 0.00877165624 C5 = 0.0405249716 C6 = 72.7685343

Refraction index
n _2.3254	-----
n _1.9701	1.581872
n _1.5296	1.589512
n _1.06	1.597346
n _t	1.598242
n _s	1.601985
n _r	1.606890
n _C	1.609237
n _C'	1.609897
n _0.6328	1.610513
n _D	1.613274
n _d	1.613396
n _e	1.616690
n _F	1.623094
n _F'	1.623901
n _g	1.630875
n _h	1.637489
n _i	1.649138
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7934
P_C,A'	0.3388
P_d,C	0.3001
P_e,C	0.5377
P_g,d	1.2613
P_g,F	0.5615
P_h,g	0.4772
P_i,g	1.3179
P_C',t	0.8410
P_e,C'	0.4902
P_F',e	0.5203
P_i,F'	1.8212

transmittance: 10 mm
τ_0.31	0.03
τ_0.32	0.19
τ_0.33	0.4
τ_0.34	0.58
τ_0.35	0.72
τ_0.36	0.82
τ_0.37	0.89
τ_0.38	0.938
τ_0.39	0.961
τ_0.4	0.976
τ_0.42	0.989
τ_0.44	0.994
τ_0.46	0.996
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.999
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.997
τ_1.2	0.998
τ_1.4	0.97
τ_1.6	0.984
τ_1.8	0.971
τ₂	0.924
τ_2.2	0.74
τ_2.4	0.46

Poisson coef.: 0.273
Rigidity: 242 Pa*10⁸
Young module: 615 Pa*10⁸
Knoop hardness: 420
Abrasion: 120

Climatic resistance: 1
Resistance to acids: 53.2
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	52
100 ~ 300	62

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	4.5
-20 ~ 0	C'	4.6
0 ~ 20	C'	4.7
20 ~ 40	C'	4.9
40 ~ 60	C'	5.1
60 ~ 80	C'	5.3
-40 ~ -20	D	4.7
-20 ~ 0	D	4.8
0 ~ 20	D	4.9
20 ~ 40	D	5.1
40 ~ 60	D	5.3
60 ~ 80	D	5.6
-40 ~ -20	e	4.9
-20 ~ 0	e	5
0 ~ 20	e	5.1
20 ~ 40	e	5.3
40 ~ 60	e	5.6
60 ~ 80	e	5.8
-40 ~ -20	F	5.4
-20 ~ 0	F	5.5
0 ~ 20	F	5.6
20 ~ 40	F	5.8
40 ~ 60	F	6.1
60 ~ 80	F	6.4
-40 ~ -20	g	5.9
-20 ~ 0	g	6
0 ~ 20	g	6.2
20 ~ 40	g	6.4
40 ~ 60	g	6.7
60 ~ 80	g	7