S-BSL 7 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.516329 n_e = 1.518250	V_d = 64.14 V_e = 63.93	n_F - n_C = 0.008049 n_F' - n_C' = 0.008106	Coloring: 0.29 - 0.33 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.1515019 C2 = 0.118583612 C3 = 1.26301359 C4 = 0.010598413 C5 = -0.011822519 C6 = 129.617662

Refraction index
n _2.3254	-----
n _1.9701	1.494620
n _1.5296	1.500503
n _1.06	1.506244
n _t	1.506861
n _s	1.509346
n _r	1.512427
n _C	1.513855
n _C'	1.514251
n _0.6328	1.514620
n _D	1.516257
n _d	1.516329
n _e	1.518250
n _F	1.521904
n _F'	1.522357
n _g	1.526213
n _h	1.529768
n _i	1.535784
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8687
P_C,A'	0.3580
P_d,C	0.3074
P_e,C	0.5460
P_g,d	1.2278
P_g,F	0.5352
P_h,g	0.4415
P_i,g	1.1889
P_C',t	0.9180
P_e,C'	0.4968
P_F',e	0.5102
P_i,F'	1.6679

transmittance: 10 mm
τ_0.29	0.08
τ_0.3	0.31
τ_0.31	0.58
τ_0.32	0.77
τ_0.33	0.88
τ_0.34	0.94
τ_0.35	0.968
τ_0.36	0.984
τ_0.37	0.991
τ_0.38	0.991
τ_0.39	0.996
τ_0.4	0.997
τ_0.42	0.996
τ_0.44	0.995
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.995
τ_1.4	0.982
τ_1.6	0.991
τ_1.8	0.98
τ₂	0.961
τ_2.2	0.89
τ_2.4	0.85

Poisson coef.: 0.205
Rigidity: 332 Pa*10⁸
Young module: 800 Pa*10⁸
Knoop hardness: 570
Abrasion: 94

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	72
100 ~ 300	86

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.5
20 ~ 40		0.3
60 ~ 80		0.7
-40 ~ -20	e	0.5
20 ~ 40	e	1.5
60 ~ 80	e	2
-40 ~ -20	g	1.5
20 ~ 40	g	2.7
60 ~ 80	g	3.3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.1
-20 ~ 0	t	2.1
0 ~ 20	t	2.2
20 ~ 40	t	2.2
40 ~ 60	t	2.3
60 ~ 80	t	2.4
-40 ~ -20	C'	2.3
-20 ~ 0	C'	2.4
0 ~ 20	C'	2.5
20 ~ 40	C'	2.6
40 ~ 60	C'	2.6
60 ~ 80	C'	2.7
-40 ~ -20		2.3
-20 ~ 0		2.4
0 ~ 20		2.5
20 ~ 40		2.6
40 ~ 60		2.7
60 ~ 80		2.7
-40 ~ -20	D	2.4
-20 ~ 0	D	2.5
0 ~ 20	D	2.6
20 ~ 40	D	2.7
40 ~ 60	D	2.8
60 ~ 80	D	2.9
-40 ~ -20	e	2.5
-20 ~ 0	e	2.6
0 ~ 20	e	2.7
20 ~ 40	e	2.8
40 ~ 60	e	2.9
60 ~ 80	e	3
-40 ~ -20	F	2.7
-20 ~ 0	F	2.8
0 ~ 20	F	3
20 ~ 40	F	3.1
40 ~ 60	F	3.2
60 ~ 80	F	3.3
-40 ~ -20	g	3
-20 ~ 0	g	3.1
0 ~ 20	g	3.2
20 ~ 40	g	3.3
40 ~ 60	g	3.5
60 ~ 80	g	3.6
-40 ~ -20		1.7
20 ~ 40		1.7