PBH25 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.761797 n_e = 1.768432	V_d = 27.10 V_e = 26.89	n_F - n_C = 0.028102 n_F' - n_C' = 0.028569	Coloring: 0.37 - 0.42 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.9830277 C2 = -0.010435952 C3 = 0.036346467 C4 = 0.0026194115 C5 = -0.00017513176 C6 = 0.000021325099

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.734930
n _s	1.740716
n _r	1.749308
n _C	1.753702
n _C'	1.754960
n _0.6328	1.756147
n _D	1.761554
n _d	1.761797
n _e	1.768432
n _F	1.781805
n _F'	1.783529
n _g	1.798837
n _h	1.814043
n _i	1.842720
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6679
P_C,A'	0.3067
P_d,C	0.2880
P_e,C	0.5241
P_g,d	1.3180
P_g,F	0.6060
P_h,g	0.5410
P_i,g	1.5615
P_C',t	0.7127
P_e,C'	0.4793
P_F',e	0.5372
P_i,F'	2.1062

transmittance: 10 mm
τ_0.42	0.93
τ_0.44	0.964
τ_0.46	0.979
τ_0.48	0.987
τ_0.5	0.992
τ_0.55	0.997
τ_0.6	0.996
τ_0.65	0.995
τ_0.7	0.996
τ_0.8	0.999
τ_0.9	0.999

Poisson coef.: 0.239
Rigidity: 225 Pa*10⁸
Young module: 559 Pa*10⁸
Knoop hardness: 370
Abrasion: 200

Climatic resistance: 2
Resistance to acids: 3.2
Phosphate resistance: 2.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	75
100 ~ 300	85

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	5.5
-20 ~ 0	t	5.8
0 ~ 20	t	6.2
20 ~ 40	t	6.6
40 ~ 60	t	7.1
60 ~ 80	t	7.6
-40 ~ -20	C'	7.3
-20 ~ 0	C'	7.7
0 ~ 20	C'	8.1
20 ~ 40	C'	8.5
40 ~ 60	C'	9
60 ~ 80	C'	9.6
-40 ~ -20		7.4
-20 ~ 0		7.8
0 ~ 20		8.2
20 ~ 40		8.7
40 ~ 60		9.2
60 ~ 80		9.8
-40 ~ -20	D	8
-20 ~ 0	D	8.4
0 ~ 20	D	8.8
20 ~ 40	D	9.3
40 ~ 60	D	9.9
60 ~ 80	D	10.5
-40 ~ -20	e	8.7
-20 ~ 0	e	9.1
0 ~ 20	e	9.6
20 ~ 40	e	10.1
40 ~ 60	e	10.7
60 ~ 80	e	11.3
-40 ~ -20	F	10.6
-20 ~ 0	F	11.1
0 ~ 20	F	11.6
20 ~ 40	F	12.2
40 ~ 60	F	12.8
60 ~ 80	F	13.4
-40 ~ -20	g	12.7
-20 ~ 0	g	13.2
0 ~ 20	g	13.9
20 ~ 40	g	14.6
40 ~ 60	g	15.4
60 ~ 80	g	16.2