S-NBM51 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.613397 n_e = 1.616689	V_d = 44.26 V_e = 44.02	n_F - n_C = 0.013856 n_F' - n_C' = 0.014008	Coloring: 0.32 - 0.36 mkm.

Type: Sellmeier
Spectral range: 0.3650146 - 2.325 mkm.
C1 = 1.37023101 C2 = 0.177665568 C3 = 1.30515471 C4 = 0.00871920342 C5 = 0.0405725552 C6 = 112.703058

Refraction index
n _2.3254	-----
n _1.9701	1.583132
n _1.5296	1.590122
n _1.06	1.597537
n _t	1.598405
n _s	1.602062
n _r	1.606912
n _C	1.609248
n _C'	1.609904
n _0.6328	1.610519
n _D	1.613274
n _d	1.613397
n _e	1.616689
n _F	1.623104
n _F'	1.623913
n _g	1.630911
n _h	1.637554
n _i	1.649270
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7825
P_C,A'	0.3365
P_d,C	0.2994
P_e,C	0.5370
P_g,d	1.2639
P_g,F	0.5633
P_h,g	0.4794
P_i,g	1.3249
P_C',t	0.8299
P_e,C'	0.4896
P_F',e	0.5212
P_i,F'	1.8299

transmittance: 10 mm
τ_0.32	0.08
τ_0.33	0.48
τ_0.34	0.75
τ_0.35	0.87
τ_0.36	0.925
τ_0.37	0.953
τ_0.38	0.968
τ_0.39	0.978
τ_0.4	0.984
τ_0.42	0.989
τ_0.44	0.992
τ_0.46	0.993
τ_0.48	0.995
τ_0.5	0.997
τ_0.55	0.999
τ_0.6	0.999
τ_0.65	0.999
τ_0.7	0.999
τ_0.8	0.999
τ_0.9	0.999
τ₁	0.999
τ_1.2	0.999
τ_1.4	0.998
τ_1.6	0.994
τ_1.8	0.987
τ₂	0.972
τ_2.2	0.89
τ_2.4	0.76

Poisson coef.: 0.243
Rigidity: 329 Pa*10⁸
Young module: 817 Pa*10⁸
Knoop hardness: 570
Abrasion: 121

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	65
100 ~ 300	78

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	t	3
-20 ~ 0	t	3.1
0 ~ 20	t	3.2
20 ~ 40	t	3.2
40 ~ 60	t	3.4
60 ~ 80	t	3.5
-40 ~ -20	C'	3.4
-20 ~ 0	C'	3.6
0 ~ 20	C'	3.7
20 ~ 40	C'	3.8
40 ~ 60	C'	3.9
60 ~ 80	C'	4.1
-40 ~ -20		3.4
-20 ~ 0		3.6
0 ~ 20		3.7
20 ~ 40		3.8
40 ~ 60		4
60 ~ 80		4.1
-40 ~ -20	D	3.6
-20 ~ 0	D	3.7
0 ~ 20	D	3.9
20 ~ 40	D	4
40 ~ 60	D	4.2
60 ~ 80	D	4.3
-40 ~ -20	e	3.8
-20 ~ 0	e	3.9
0 ~ 20	e	4.1
20 ~ 40	e	4.2
40 ~ 60	e	4.4
60 ~ 80	e	4.5
-40 ~ -20	F	4.2
-20 ~ 0	F	4.4
0 ~ 20	F	4.6
20 ~ 40	F	4.8
40 ~ 60	F	4.9
60 ~ 80	F	5.1
-40 ~ -20	g	4.7
-20 ~ 0	g	4.9
0 ~ 20	g	5.1
20 ~ 40	g	5.3
40 ~ 60	g	5.5
60 ~ 80	g	5.7