BPH50 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.739996 n_e = 1.745520	V_d = 31.71 V_e = 31.48	n_F - n_C = 0.023336 n_F' - n_C' = 0.023678	Coloring: 0.35 - 0.42 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.9271459 C2 = -0.011970157 C3 = 0.031922538 C4 = 0.0015457537 C5 = -0.000063507309 C6 = 0.0000096835139

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.716770
n _s	1.721981
n _r	1.729442
n _C	1.733184
n _C'	1.734249
n _0.6328	1.735252
n _D	1.739793
n _d	1.739996
n _e	1.745520
n _F	1.756520
n _F'	1.757927
n _g	1.770294
n _h	1.782355
n _i	1.804466
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7033
P_C,A'	0.3164
P_d,C	0.2919
P_e,C	0.5286
P_g,d	1.2982
P_g,F	0.5901
P_h,g	0.5168
P_i,g	1.4643
P_C',t	0.7490
P_e,C'	0.4829
P_F',e	0.5316
P_i,F'	1.9942

transmittance: 10 mm
τ_0.42	0.939
τ_0.44	0.976
τ_0.46	0.989
τ_0.48	0.994
τ_0.5	0.996
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.998
τ_0.7	0.998

Poisson coef.: 0.264
Rigidity: 262 Pa*10⁸
Young module: 663 Pa*10⁸
Knoop hardness: 430
Abrasion: 142

Climatic resistance: 2
Resistance to acids: 52.2
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	56
100 ~ 300	65

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	8
-20 ~ 0	C'	8.1
0 ~ 20	C'	8.4
20 ~ 40	C'	8.7
40 ~ 60	C'	9
60 ~ 80	C'	9.4
-40 ~ -20	D	8.4
-20 ~ 0	D	8.6
0 ~ 20	D	8.9
20 ~ 40	D	9.3
40 ~ 60	D	9.7
60 ~ 80	D	10.1
-40 ~ -20	e	8.9
-20 ~ 0	e	9.1
0 ~ 20	e	9.4
20 ~ 40	e	9.8
40 ~ 60	e	10.2
60 ~ 80	e	10.6
-40 ~ -20	F	10.2
-20 ~ 0	F	10.5
0 ~ 20	F	10.8
20 ~ 40	F	11.2
40 ~ 60	F	11.6
60 ~ 80	F	12
-40 ~ -20	g	11.5
-20 ~ 0	g	11.8
0 ~ 20	g	12.2
20 ~ 40	g	12.7
40 ~ 60	g	13.2
60 ~ 80	g	13.7