S-LAL 7 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.651596 n_e = 1.654250	V_d = 58.55 V_e = 58.30	n_F - n_C = 0.011128 n_F' - n_C' = 0.011221	Coloring: 0.28 - 0.35 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 0.916121247 C2 = 0.765948319 C3 = 1.27745023 C4 = 0.00395889743 C5 = 0.0167547425 C6 = 110.762706

Refraction index
n _2.3254	-----
n _1.9701	1.624788
n _1.5296	1.631435
n _1.06	1.638234
n _t	1.639002
n _s	1.642179
n _r	1.646272
n _C	1.648206
n _C'	1.648746
n _0.6328	1.649251
n _D	1.651497
n _d	1.651596
n _e	1.654250
n _F	1.659335
n _F'	1.659968
n _g	1.665374
n _h	1.670383
n _i	1.678916
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8270
P_C,A'	0.3489
P_d,C	0.3046
P_e,C	0.5431
P_g,d	1.2379
P_g,F	0.5426
P_h,g	0.4501
P_i,g	1.2168
P_C',t	0.8755
P_e,C'	0.4945
P_F',e	0.5137
P_i,F'	1.7026

transmittance: 10 mm
τ_0.28	0.09
τ_0.29	0.22
τ_0.3	0.38
τ_0.31	0.55
τ_0.32	0.69
τ_0.33	0.8
τ_0.34	0.88
τ_0.35	0.929
τ_0.36	0.957
τ_0.37	0.974
τ_0.38	0.984
τ_0.39	0.99
τ_0.4	0.992
τ_0.42	0.994
τ_0.44	0.995
τ_0.46	0.996
τ_0.48	0.997
τ_0.5	0.998
τ_0.55	0.999
τ_0.6	0.998
τ_0.65	0.998
τ_0.7	0.998
τ_0.8	0.999
τ_0.9	0.998
τ₁	0.998
τ_1.2	0.997
τ_1.4	0.991
τ_1.6	0.993
τ_1.8	0.984
τ₂	0.968
τ_2.2	0.903
τ_2.4	0.74

Poisson coef.: 0.271
Rigidity: 377 Pa*10⁸
Young module: 958 Pa*10⁸
Knoop hardness: 560
Abrasion: 136

Climatic resistance: 2
Resistance to acids: 53
Phosphate resistance: 4

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	67
100 ~ 300	81

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	1.5
-20 ~ 0	t	1.5
0 ~ 20	t	1.6
20 ~ 40	t	1.8
40 ~ 60	t	1.8
60 ~ 80	t	1.8
-40 ~ -20	C'	1.8
-20 ~ 0	C'	1.8
0 ~ 20	C'	1.9
20 ~ 40	C'	2
40 ~ 60	C'	2.1
60 ~ 80	C'	2.2
-40 ~ -20		1.8
-20 ~ 0		1.9
0 ~ 20		2
20 ~ 40		2
40 ~ 60		2.1
60 ~ 80		2.2
-40 ~ -20	D	1.9
-20 ~ 0	D	2
0 ~ 20	D	2.1
20 ~ 40	D	2.2
40 ~ 60	D	2.3
60 ~ 80	D	2.4
-40 ~ -20	e	2
-20 ~ 0	e	2.1
0 ~ 20	e	2.2
20 ~ 40	e	2.3
40 ~ 60	e	2.4
60 ~ 80	e	2.5
-40 ~ -20	F	2.3
-20 ~ 0	F	2.4
0 ~ 20	F	2.5
20 ~ 40	F	2.6
40 ~ 60	F	2.8
60 ~ 80	F	2.9
-40 ~ -20	g	2.6
-20 ~ 0	g	2.7
0 ~ 20	g	2.8
20 ~ 40	g	3
40 ~ 60	g	3.1
60 ~ 80	g	3.2