PBH 4 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.755199 n_e = 1.761681	V_d = 27.51 V_e = 27.30	n_F - n_C = 0.027449 n_F' - n_C' = 0.027899	Coloring: 0.35 - 0.41 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.961379 C2 = -0.0098262329 C3 = 0.036779565 C4 = 0.0020712902 C5 = -0.000093348652 C6 = 0.000015491439

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.728853
n _s	1.734542
n _r	1.742976
n _C	1.747281
n _C'	1.748512
n _0.6328	1.749674
n _D	1.754961
n _d	1.755199
n _e	1.761681
n _F	1.774730
n _F'	1.776412
n _g	1.791318
n _h	1.806078
n _i	1.833709
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6713
P_C,A'	0.3078
P_d,C	0.2884
P_e,C	0.5246
P_g,d	1.3158
P_g,F	0.6043
P_h,g	0.5376
P_i,g	1.5443
P_C',t	0.7161
P_e,C'	0.4797
P_F',e	0.5366
P_i,F'	2.0873

transmittance: 10 mm
τ_0.4	0.912
τ_0.42	0.961
τ_0.44	0.979
τ_0.46	0.986
τ_0.48	0.991
τ_0.5	0.994
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.995
τ_0.7	0.997
τ_0.8	0.999
τ_0.9	0.999

Poisson coef.: 0.239
Rigidity: 226 Pa*10⁸
Young module: 560 Pa*10⁸
Knoop hardness: 350
Abrasion: 183

Climatic resistance: 2
Resistance to acids: 4.2
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	79
100 ~ 300	89

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	6.9
-20 ~ 0	C'	7
0 ~ 20	C'	7.3
20 ~ 40	C'	7.6
40 ~ 60	C'	8
60 ~ 80	C'	8.5
-40 ~ -20	D	7.6
-20 ~ 0	D	7.7
0 ~ 20	D	8
20 ~ 40	D	8.5
40 ~ 60	D	9.1
60 ~ 80	D	9.6
-40 ~ -20	e	8.3
-20 ~ 0	e	8.5
0 ~ 20	e	8.8
20 ~ 40	e	9.3
40 ~ 60	e	9.8
60 ~ 80	e	10.2
-40 ~ -20	F	9.9
-20 ~ 0	F	10.2
0 ~ 20	F	10.5
20 ~ 40	F	10.9
40 ~ 60	F	11.8
60 ~ 80	F	12.3
-40 ~ -20	g	12.1
-20 ~ 0	g	12.3
0 ~ 20	g	12.8
20 ~ 40	g	13.5
40 ~ 60	g	14.1
60 ~ 80	g	14.8