BSL21 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.503779 n_e = 1.505580	V_d = 66.81 V_e = 66.62	n_F - n_C = 0.007539 n_F' - n_C' = 0.007587	Coloring: 0.29 - 0.32 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.234734 C2 = -0.0097856687 C3 = 0.0098367633 C4 = 0.00021398416 C5 = -0.000014554893 C6 = 0.00000087393721

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.494800
n _s	1.497179
n _r	1.500103
n _C	1.501451
n _C'	1.501824
n _0.6328	1.502172
n _D	1.503711
n _d	1.503779
n _e	1.505580
n _F	1.508991
n _F'	1.509412
n _g	1.512990
n _h	1.516273
n _i	1.521819
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8819
P_C,A'	0.3614
P_d,C	0.3087
P_e,C	0.5476
P_g,d	1.2215
P_g,F	0.5303
P_h,g	0.4354
P_i,g	1.1709
P_C',t	0.9315
P_e,C'	0.4980
P_F',e	0.5082
P_i,F'	1.6454

transmittance: 10 mm
τ_0.33	0.927
τ_0.34	0.961
τ_0.35	0.978
τ_0.36	0.987
τ_0.37	0.99
τ_0.38	0.988
τ_0.39	0.995
τ_0.4	0.996
τ_0.42	0.995
τ_0.44	0.996
τ_0.46	0.997
τ_0.48	0.998
τ_0.5	0.998
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.999
τ_2.3254	0.75
τ_1.9701	0.967
τ_1.5296	0.994
τ_1.06	0.996
τ_0.66	0.997
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.4358	0.982
τ_0.4047	0.976
τ_0.365	0.85
τ_0.3341	0.4

transmittance: 25 mm
τ_2.3254	0.49
τ_1.9701	0.92
τ_1.5296	0.985
τ_1.06	0.99
τ_0.7	0.992
τ_0.66	0.993
τ_0.62	0.994
τ_0.58	0.995
τ_0.54607	0.995
τ_0.5	0.991
τ_0.46	0.974
τ_0.4358	0.956
τ_0.42	0.95
τ_0.4047	0.94
τ_0.4	0.93
τ_0.39	0.91
τ_0.38	0.87
τ_0.37	0.77
τ_0.365	0.67
τ_0.35	0.35
τ_0.3341	0.1

Poisson coef.: 0.206
Rigidity: 297 Pa*10⁸
Young module: 716 Pa*10⁸
Knoop hardness: 540
Abrasion: 95

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	62
100 ~ 300	70
20 ~ 300	95

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-3.1
20 ~ 40		-2.2
60 ~ 80		-1.8
-40 ~ -20	e	-2.5
20 ~ 40	e	-1.5
60 ~ 80	e	-1
-40 ~ -20	g	-1.9
20 ~ 40	g	-0.8
60 ~ 80	g	-0.2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	2.4
-20 ~ 0	C'	2.5
0 ~ 20	C'	2.6
20 ~ 40	C'	2.8
40 ~ 60	C'	3
60 ~ 80	C'	3.2
-40 ~ -20	D	2.4
-20 ~ 0	D	2.5
0 ~ 20	D	2.7
20 ~ 40	D	2.8
40 ~ 60	D	3
60 ~ 80	D	3.3
-40 ~ -20	e	2.5
-20 ~ 0	e	2.6
0 ~ 20	e	2.7
20 ~ 40	e	2.9
40 ~ 60	e	3.1
60 ~ 80	e	3.4
-40 ~ -20	F	2.7
-20 ~ 0	F	2.8
0 ~ 20	F	2.9
20 ~ 40	F	3.1
40 ~ 60	F	3.4
60 ~ 80	F	3.7
-40 ~ -20	g	2.9
-20 ~ 0	g	3
0 ~ 20	g	3.2
20 ~ 40	g	3.4
40 ~ 60	g	3.6
60 ~ 80	g	3.9
-40 ~ -20		-0.9
20 ~ 40		-0.8
60 ~ 80		-0.7