BPH45 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.718501 n_e = 1.723578	V_d = 33.51 V_e = 33.28	n_F - n_C = 0.021437 n_F' - n_C' = 0.021739	Coloring: 0.35 - 0.42 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.8619065 C2 = -0.012425617 C3 = 0.02988917 C4 = 0.0010370691 C5 = 0.0000016015692 C6 = 0.0000044595212

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.696817
n _s	1.701774
n _r	1.708750
n _C	1.712218
n _C'	1.713203
n _0.6328	1.714129
n _D	1.718314
n _d	1.718501
n _e	1.723578
n _F	1.733656
n _F'	1.734942
n _g	1.746224
n _h	1.757171
n _i	1.777029
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7184
P_C,A'	0.3200
P_d,C	0.2930
P_e,C	0.5298
P_g,d	1.2931
P_g,F	0.5862
P_h,g	0.5106
P_i,g	1.4369
P_C',t	0.7643
P_e,C'	0.4839
P_F',e	0.5301
P_i,F'	1.9631

transmittance: 10 mm
τ_0.42	0.941
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.: 0.274
Rigidity: 270 Pa*10⁸
Young module: 688 Pa*10⁸
Knoop hardness: 460
Abrasion: 131

Climatic resistance: 3
Resistance to acids: 52
Phosphate resistance: 4.3

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	57
100 ~ 300	69

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	7.2
-20 ~ 0	C'	7.3
0 ~ 20	C'	7.5
20 ~ 40	C'	7.7
40 ~ 60	C'	8
60 ~ 80	C'	8.3
-40 ~ -20	D	7.6
-20 ~ 0	D	7.7
0 ~ 20	D	7.9
20 ~ 40	D	8.2
40 ~ 60	D	8.5
60 ~ 80	D	8.8
-40 ~ -20	e	8
-20 ~ 0	e	8.2
0 ~ 20	e	8.4
20 ~ 40	e	8.6
40 ~ 60	e	8.9
60 ~ 80	e	9.3
-40 ~ -20	F	9
-20 ~ 0	F	9.2
0 ~ 20	F	9.5
20 ~ 40	F	9.8
40 ~ 60	F	10.2
60 ~ 80	F	10.6
-40 ~ -20	g	10.2
-20 ~ 0	g	10.5
0 ~ 20	g	10.8
20 ~ 40	g	11.1
40 ~ 60	g	11.5
60 ~ 80	g	12