NSL 7 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.511120 n_e = 1.513135	V_d = 60.48 V_e = 60.21	n_F - n_C = 0.008450 n_F' - n_C' = 0.008521	Coloring: 0.30 - 0.33 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.2524157 C2 = -0.008626195 C3 = 0.011155352 C4 = 0.00020721565 C5 = -0.00000026893015 C6 = 0.000000038724966

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.501529
n _s	1.503964
n _r	1.507079
n _C	1.508547
n _C'	1.508957
n _0.6328	1.509340
n _D	1.511045
n _d	1.511120
n _e	1.513135
n _F	1.516997
n _F'	1.517479
n _g	1.521590
n _h	1.525401
n _i	1.531886
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8304
P_C,A'	0.3491
P_d,C	0.3044
P_e,C	0.5428
P_g,d	1.2390
P_g,F	0.5434
P_h,g	0.4509
P_i,g	1.2183
P_C',t	0.8789
P_e,C'	0.4943
P_F',e	0.5140
P_i,F'	1.7049

transmittance: 10 mm
τ_0.34	0.942
τ_0.35	0.974
τ_0.36	0.986
τ_0.37	0.989
τ_0.38	0.988
τ_0.39	0.994
τ_0.4	0.996
τ_0.42	0.995
τ_0.44	0.994
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.997
τ_0.6	0.997
τ_0.65	0.996
τ_0.7	0.997
τ_0.8	0.998
τ_0.9	0.997
τ_2.5	0.76
τ_2.3254	0.82
τ_1.9701	0.93
τ_1.5296	0.996
τ_1.06	0.999
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.997
τ_0.4358	0.997
τ_0.4047	0.996
τ_0.365	0.992
τ_0.3341	0.91
τ_0.32	0.6

transmittance: 25 mm
τ_2.5	0.5
τ_2.3254	0.61
τ_1.9701	0.84
τ_1.5296	0.99
τ_1.06	0.998
τ_0.7	0.996
τ_0.66	0.995
τ_0.62	0.995
τ_0.58	0.994
τ_0.54607	0.993
τ_0.5	0.993
τ_0.46	0.992
τ_0.4358	0.992
τ_0.42	0.991
τ_0.4047	0.991
τ_0.4	0.991
τ_0.39	0.99
τ_0.38	0.988
τ_0.37	0.984
τ_0.365	0.981
τ_0.35	0.955
τ_0.3341	0.8
τ_0.32	0.28

Poisson coef.: 0.215
Rigidity: 284 Pa*10⁸
Young module: 690 Pa*10⁸
Knoop hardness: 510
Abrasion: 111

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	90
100 ~ 300	102
20 ~ 300	92

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		-0.6
20 ~ 40		0.6
60 ~ 80		1
-40 ~ -20	e	0.3
20 ~ 40	e	1.5
60 ~ 80	e	2
-40 ~ -20	g	1.3
20 ~ 40	g	2.5
60 ~ 80	g	3

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	1.1
-20 ~ 0	C'	1
0 ~ 20	C'	1
20 ~ 40	C'	1
40 ~ 60	C'	1.1
60 ~ 80	C'	1.2
-40 ~ -20	D	1.2
-20 ~ 0	D	1.1
0 ~ 20	D	1.1
20 ~ 40	D	1.1
40 ~ 60	D	1.3
60 ~ 80	D	1.3
-40 ~ -20	e	1.3
-20 ~ 0	e	1.3
0 ~ 20	e	1.3
20 ~ 40	e	1.3
40 ~ 60	e	1.4
60 ~ 80	e	1.5
-40 ~ -20	F	1.6
-20 ~ 0	F	1.6
0 ~ 20	F	1.6
20 ~ 40	F	1.6
40 ~ 60	F	1.7
60 ~ 80	F	1.7
-40 ~ -20	g	1.9
-20 ~ 0	g	1.8
0 ~ 20	g	1.9
20 ~ 40	g	1.9
40 ~ 60	g	2.1
60 ~ 80	g	2.2
-40 ~ -20		1.5
20 ~ 40		1.9
60 ~ 80		2