S-TIL27 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.575005 n_e = 1.578290	V_d = 41.50 V_e = 41.22	n_F - n_C = 0.013853 n_F' - n_C' = 0.014028	Coloring: 0.35 - 0.38 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.31433154 C2 = 0.112300168 C3 = 1.413901 C4 = 0.00950404477 C5 = 0.0524112772 C6 = 148.429972

Refraction index
n _2.3254	-----
n _1.9701	1.547071
n _1.5296	1.553036
n _1.06	1.559664
n _t	1.560469
n _s	1.563921
n _r	1.568612
n _C	1.570902
n _C'	1.571548
n _0.6328	1.572155
n _D	1.574884
n _d	1.575005
n _e	1.578290
n _F	1.584756
n _F'	1.585577
n _g	1.592745
n _h	1.599662
n _i	1.612184
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7530
P_C,A'	0.3286
P_d,C	0.2962
P_e,C	0.5333
P_g,d	1.2804
P_g,F	0.5766
P_h,g	0.4993
P_i,g	1.4031
P_C',t	0.7997
P_e,C'	0.4866
P_F',e	0.5259
P_i,F'	1.9205

transmittance: 10 mm
τ_0.35	0.05
τ_0.36	0.44
τ_0.37	0.78
τ_0.38	0.913
τ_0.39	0.961
τ_0.4	0.979
τ_0.42	0.99
τ_0.44	0.993
τ_0.46	0.994
τ_0.48	0.995
τ_0.5	0.996
τ_0.55	0.998
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.998
τ_1.2	0.998
τ_1.4	0.994
τ_1.6	0.993
τ_1.8	0.978
τ₂	0.955
τ_2.2	0.89
τ_2.4	0.87

Poisson coef.: 0.217
Rigidity: 308 Pa*10⁸
Young module: 749 Pa*10⁸
Knoop hardness: 540
Abrasion: 120

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

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	74
100 ~ 300	89

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	2.4
-20 ~ 0	t	2.4
0 ~ 20	t	2.5
20 ~ 40	t	2.5
40 ~ 60	t	2.5
60 ~ 80	t	2.5
-40 ~ -20	C'	2.9
-20 ~ 0	C'	2.9
0 ~ 20	C'	3
20 ~ 40	C'	3
40 ~ 60	C'	3
60 ~ 80	C'	3.1
-40 ~ -20		3
-20 ~ 0		3
0 ~ 20		3
20 ~ 40		3.1
40 ~ 60		3.1
60 ~ 80		3.1
-40 ~ -20	D	3.1
-20 ~ 0	D	3.2
0 ~ 20	D	3.2
20 ~ 40	D	3.3
40 ~ 60	D	3.3
60 ~ 80	D	3.3
-40 ~ -20	e	3.3
-20 ~ 0	e	3.4
0 ~ 20	e	3.5
20 ~ 40	e	3.5
40 ~ 60	e	3.6
60 ~ 80	e	3.6
-40 ~ -20	F	3.9
-20 ~ 0	F	4
0 ~ 20	F	4
20 ~ 40	F	4.1
40 ~ 60	F	4.2
60 ~ 80	F	4.3
-40 ~ -20	g	4.5
-20 ~ 0	g	4.6
0 ~ 20	g	4.7
20 ~ 40	g	4.8
40 ~ 60	g	4.9
60 ~ 80	g	5