BPH35 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.644495 n_e = 1.648245	V_d = 40.81 V_e = 40.57	n_F - n_C = 0.015789 n_F' - n_C' = 0.015974	Coloring: 0.33 - 0.39 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.6413378 C2 = -0.012997513 C3 = 0.02125189 C4 = 0.00074166905 C5 = -0.000019814508 C6 = 0.0000030698879

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.627676
n _s	1.631727
n _r	1.637159
n _C	1.639793
n _C'	1.640535
n _0.6328	1.641231
n _D	1.644356
n _d	1.644495
n _e	1.648245
n _F	1.655583
n _F'	1.656510
n _g	1.664563
n _h	1.672247
n _i	1.685899
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7674
P_C,A'	0.3323
P_d,C	0.2978
P_e,C	0.5352
P_g,d	1.2709
P_g,F	0.5687
P_h,g	0.4866
P_i,g	1.3512
P_C',t	0.8144
P_e,C'	0.4882
P_F',e	0.5234
P_i,F'	1.8612

transmittance: 10 mm
τ_0.39	0.913
τ_0.4	0.95
τ_0.42	0.982
τ_0.44	0.99
τ_0.46	0.995
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.998
τ_0.7	0.998

Poisson coef.: 0.274
Rigidity: 261 Pa*10⁸
Young module: 666 Pa*10⁸
Knoop hardness: 470
Abrasion: 111

Climatic resistance: 3
Resistance to acids: 52.1
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	48
100 ~ 300	62

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	5.4
-20 ~ 0	C'	5.5
0 ~ 20	C'	5.6
20 ~ 40	C'	5.8
40 ~ 60	C'	6.1
60 ~ 80	C'	6.3
-40 ~ -20	D	5.8
-20 ~ 0	D	5.9
0 ~ 20	D	6
20 ~ 40	D	6.1
40 ~ 60	D	6.3
60 ~ 80	D	6.5
-40 ~ -20	e	5.9
-20 ~ 0	e	6
0 ~ 20	e	6.2
20 ~ 40	e	6.4
40 ~ 60	e	6.6
60 ~ 80	e	6.8
-40 ~ -20	F	6.5
-20 ~ 0	F	6.6
0 ~ 20	F	6.7
20 ~ 40	F	7
40 ~ 60	F	7.2
60 ~ 80	F	7.5
-40 ~ -20	g	7.1
-20 ~ 0	g	7.2
0 ~ 20	g	7.4
20 ~ 40	g	7.7
40 ~ 60	g	8
60 ~ 80	g	8.3