S-BAL 2 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.570988 n_e = 1.573662	V_d = 50.79 V_e = 50.50	n_F - n_C = 0.011239 n_F' - n_C' = 0.011358	Coloring: 0.34 - 0.37 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.30923813 C2 = 0.114137353 C3 = 1.17882259 C4 = 0.00838873953 C5 = 0.0399436485 C6 = 140.257892

Refraction index
n _2.3254	-----
n _1.9701	1.547206
n _1.5296	1.552440
n _1.06	1.558175
n _t	1.558862
n _s	1.561790
n _r	1.565717
n _C	1.567615
n _C'	1.568149
n _0.6328	1.568649
n _D	1.570889
n _d	1.570988
n _e	1.573662
n _F	1.578855
n _F'	1.579508
n _g	1.585137
n _h	1.590445
n _i	1.599716
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7787
P_C,A'	0.3368
P_d,C	0.3001
P_e,C	0.5379
P_g,d	1.2587
P_g,F	0.5588
P_h,g	0.4722
P_i,g	1.2971
P_C',t	0.8262
P_e,C'	0.4904
P_F',e	0.5200
P_i,F'	1.7979

transmittance: 10 mm
τ_0.34	0.1
τ_0.35	0.47
τ_0.36	0.76
τ_0.37	0.89
τ_0.38	0.947
τ_0.39	0.971
τ_0.4	0.983
τ_0.42	0.992
τ_0.44	0.993
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.998
τ_0.9	0.998
τ₁	0.997
τ_1.2	0.997
τ_1.4	0.992
τ_1.6	0.992
τ_1.8	0.976
τ₂	0.951
τ_2.2	0.89
τ_2.4	0.84

Poisson coef.: 0.245
Rigidity: 292 Pa*10⁸
Young module: 727 Pa*10⁸
Knoop hardness: 510
Abrasion: 163

Climatic resistance: 3
Resistance to acids: 1
Phosphate resistance: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	91
100 ~ 300	109

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	-0.7
-20 ~ 0	t	-0.7
0 ~ 20	t	-0.6
20 ~ 40	t	-0.6
40 ~ 60	t	-0.6
60 ~ 80	t	-0.5
-40 ~ -20	C'	-0.3
-20 ~ 0	C'	-0.3
0 ~ 20	C'	-0.2
20 ~ 40	C'	-0.2
40 ~ 60	C'	-0.1
60 ~ 80	C'	-0.1
-40 ~ -20		-0.3
-20 ~ 0		-0.3
0 ~ 20		-0.2
20 ~ 40		-0.2
40 ~ 60		-0.1
60 ~ 80		-0.1
-40 ~ -20	D	-0.2
-20 ~ 0	D	-0.1
0 ~ 20	D	-0.1
40 ~ 60	D	0.1
60 ~ 80	D	0.1
0 ~ 20	e	0.1
20 ~ 40	e	0.2
40 ~ 60	e	0.2
60 ~ 80	e	0.3
-40 ~ -20	F	0.4
-20 ~ 0	F	0.4
0 ~ 20	F	0.5
20 ~ 40	F	0.6
40 ~ 60	F	0.7
60 ~ 80	F	0.8
-40 ~ -20	g	0.7
-20 ~ 0	g	0.8
0 ~ 20	g	0.9
20 ~ 40	g	1.1
40 ~ 60	g	1.2
60 ~ 80	g	1.3