BPM 4 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.613400 n_e = 1.616725	V_d = 43.84 V_e = 43.60	n_F - n_C = 0.013991 n_F' - n_C' = 0.014142	Coloring: 0.32 - 0.38 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.5489492 C2 = -0.012922911 C3 = 0.018433588 C4 = 0.00067483064 C5 = -0.000028837579 C6 = 0.000003057603

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.598188
n _s	1.601926
n _r	1.606845
n _C	1.609207
n _C'	1.609871
n _0.6328	1.610492
n _D	1.613276
n _d	1.613400
n _e	1.616725
n _F	1.623198
n _F'	1.624014
n _g	1.631067
n _h	1.637760
n _i	1.649577
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7875
P_C,A'	0.3372
P_d,C	0.2996
P_e,C	0.5373
P_g,d	1.2627
P_g,F	0.5624
P_h,g	0.4783
P_i,g	1.3229
P_C',t	0.8350
P_e,C'	0.4898
P_F',e	0.5209
P_i,F'	1.8270

transmittance: 10 mm
τ_0.39	0.936
τ_0.4	0.96
τ_0.42	0.983
τ_0.44	0.99
τ_0.46	0.994
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.997
τ_0.8	0.997
τ_0.9	0.997

Poisson coef.: 0.275
Rigidity: 241 Pa*10⁸
Young module: 614 Pa*10⁸
Knoop hardness: 420
Abrasion: 118

Climatic resistance: 3
Resistance to acids: 53.2
Phosphate resistance: 4.2

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	53
100 ~ 300	64

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	4.1
-20 ~ 0	t	4.2
0 ~ 20	t	4.3
20 ~ 40	t	4.4
40 ~ 60	t	4.5
60 ~ 80	t	4.8
-40 ~ -20	C'	4.7
-20 ~ 0	C'	4.8
0 ~ 20	C'	4.8
20 ~ 40	C'	5
40 ~ 60	C'	5.2
60 ~ 80	C'	5.4
-40 ~ -20		4.8
-20 ~ 0		4.9
0 ~ 20		4.9
20 ~ 40		5.1
40 ~ 60		5.2
60 ~ 80		5.4
-40 ~ -20	D	5.1
-20 ~ 0	D	5.1
0 ~ 20	D	5.2
20 ~ 40	D	5.3
40 ~ 60	D	5.4
60 ~ 80	D	5.6
-40 ~ -20	e	5.3
-20 ~ 0	e	5.3
0 ~ 20	e	5.4
20 ~ 40	e	5.5
40 ~ 60	e	5.6
60 ~ 80	e	5.8
-40 ~ -20	F	5.8
-20 ~ 0	F	5.8
0 ~ 20	F	5.9
20 ~ 40	F	6
40 ~ 60	F	6.2
60 ~ 80	F	6.4
-40 ~ -20	g	6.3
-20 ~ 0	g	6.4
0 ~ 20	g	6.5
20 ~ 40	g	6.6
40 ~ 60	g	6.8
60 ~ 80	g	7.1