S-NPH 1 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.808094 n_e = 1.816432	V_d = 22.76 V_e = 22.56	n_F - n_C = 0.035503 n_F' - n_C' = 0.036173	Coloring: 0.38 - 0.44 mkm.

Type: Sellmeier
Spectral range: 0.4046561 - 2.325 mkm.
C1 = 1.75156623 C2 = 0.364006304 C3 = 2.47874141 C4 = 0.0135004681 C5 = 0.0668245147 C6 = 170.756006

Refraction index
n _2.3254	-----
n _1.9701	1.752258
n _1.5296	1.761251
n _1.06	1.772984
n _t	1.774588
n _s	1.781872
n _r	1.792555
n _C	1.798008
n _C'	1.799572
n _0.6328	1.801047
n _D	1.807790
n _d	1.808094
n _e	1.816432
n _F	1.833512
n _F'	1.835745
n _g	1.855904
n _h	1.876579
n _i	-----
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.6596
P_C,A'	0.3013
P_d,C	0.2840
P_e,C	0.5189
P_g,d	1.3466
P_g,F	0.6307
P_h,g	0.5823
P_i,g	-----
P_C',t	0.7036
P_e,C'	0.4748
P_F',e	0.5439
P_i,F'	-----

transmittance: 10 mm
τ_0.38	0.14
τ_0.39	0.53
τ_0.4	0.77
τ_0.42	0.917
τ_0.44	0.952
τ_0.46	0.967
τ_0.48	0.975
τ_0.5	0.982
τ_0.55	0.992
τ_0.6	0.994
τ_0.65	0.995
τ_0.7	0.996
τ_0.8	0.997
τ_0.9	0.997
τ₁	0.996
τ_1.2	0.997
τ_1.4	0.994
τ_1.6	0.992
τ_1.8	0.984
τ₂	0.973
τ_2.2	0.934
τ_2.4	0.88

Poisson coef.: 0.25
Rigidity: 357 Pa*10⁸
Young module: 893 Pa*10⁸
Knoop hardness: 460
Abrasion: 291

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	83
100 ~ 300	104

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	-1.9
-20 ~ 0	t	-1.9
0 ~ 20	t	-1.8
20 ~ 40	t	-1.8
40 ~ 60	t	-1.8
60 ~ 80	t	-1.7
-40 ~ -20	C'	-1.2
-20 ~ 0	C'	-1.1
0 ~ 20	C'	-0.9
20 ~ 40	C'	-0.8
40 ~ 60	C'	-0.7
60 ~ 80	C'	-0.5
-40 ~ -20		-1.1
-20 ~ 0		-1
0 ~ 20		-0.8
20 ~ 40		-0.7
40 ~ 60		-0.6
60 ~ 80		-0.4
-40 ~ -20	D	-0.7
-20 ~ 0	D	-0.6
0 ~ 20	D	-0.4
20 ~ 40	D	-0.3
40 ~ 60	D	-0.1
60 ~ 80	D	0.1
-40 ~ -20	e	-0.2
0 ~ 20	e	0.2
20 ~ 40	e	0.4
40 ~ 60	e	0.6
60 ~ 80	e	0.8
-40 ~ -20	F	1.2
-20 ~ 0	F	1.5
0 ~ 20	F	1.8
20 ~ 40	F	2.1
40 ~ 60	F	2.4
60 ~ 80	F	2.7
-40 ~ -20	g	3
-20 ~ 0	g	3.4
0 ~ 20	g	3.8
20 ~ 40	g	4.3
40 ~ 60	g	4.7
60 ~ 80	g	5.1