FTL10 - O'Hara

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.501371 n_e = 1.503487	V_d = 56.39 V_e = 56.09	n_F - n_C = 0.008889 n_F' - n_C' = 0.008975	Coloring: 0.34 - 0.37 mkm.

Type: Schott
Spectral range: 0.3650146 - 1.01398 mkm.
C1 = 2.2223245 C2 = -0.0085760532 C3 = 0.010967698 C4 = 0.00041693662 C5 = -0.000027463411 C6 = 0.000002170253

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.491491
n _s	1.493964
n _r	1.497164
n _C	1.498687
n _C'	1.499113
n _0.6328	1.499512
n _D	1.501292
n _d	1.501371
n _e	1.503487
n _F	1.507576
n _F'	1.508089
n _g	1.512498
n _h	1.516645
n _i	1.523897
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.8094
P_C,A'	0.3430
P_d,C	0.3019
P_e,C	0.5400
P_g,d	1.2516
P_g,F	0.5536
P_h,g	0.4665
P_i,g	1.2822
P_C',t	0.8574
P_e,C'	0.4920
P_F',e	0.5176
P_i,F'	1.7782

transmittance: 10 mm
τ_0.38	0.917
τ_0.39	0.962
τ_0.4	0.98
τ_0.42	0.99
τ_0.44	0.992
τ_0.46	0.995
τ_0.48	0.996
τ_0.5	0.997
τ_0.55	0.998
τ_0.6	0.997
τ_0.65	0.997
τ_0.7	0.998
τ_2.5	0.38
τ_2.3254	0.7
τ_1.9701	0.94
τ_1.5296	0.984
τ_1.06	0.998
τ_0.66	0.998
τ_0.62	0.998
τ_0.58	0.998
τ_0.54607	0.998
τ_0.4358	0.986
τ_0.4047	0.95
τ_0.37	0.69
τ_0.365	0.55
τ_0.35	0.16

transmittance: 25 mm
τ_2.5	0.09
τ_2.3254	0.41
τ_1.9701	0.85
τ_1.5296	0.96
τ_1.06	0.996
τ_0.7	0.996
τ_0.66	0.995
τ_0.62	0.995
τ_0.58	0.995
τ_0.54607	0.994
τ_0.5	0.994
τ_0.46	0.982
τ_0.4358	0.965
τ_0.42	0.94
τ_0.4047	0.88
τ_0.4	0.85
τ_0.39	0.78
τ_0.38	0.65
τ_0.37	0.4
τ_0.365	0.22
τ_0.35	0.01

Poisson coef.: 0.238
Rigidity: 229 Pa*10⁸
Young module: 567 Pa*10⁸
Knoop hardness: 520
Abrasion: 147

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	92
100 ~ 300	104
20 ~ 300	64

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		3.7
20 ~ 40		4.8
60 ~ 80		5.3
-40 ~ -20	e	5.4
20 ~ 40	e	6.7
60 ~ 80	e	7.4
-40 ~ -20	g	7.2
20 ~ 40	g	8.9
60 ~ 80	g	9.7

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20	C'	-1.8
-20 ~ 0	C'	-1.7
0 ~ 20	C'	-1.5
20 ~ 40	C'	-1.3
40 ~ 60	C'	-1.1
60 ~ 80	C'	-0.8
-40 ~ -20	D	-1.6
-20 ~ 0	D	-1.5
0 ~ 20	D	-1.4
20 ~ 40	D	-1.2
40 ~ 60	D	-0.9
60 ~ 80	D	-0.6
-40 ~ -20	e	-1.5
-20 ~ 0	e	-1.4
0 ~ 20	e	-1.3
20 ~ 40	e	-1.1
40 ~ 60	e	-0.8
60 ~ 80	e	-0.5
-40 ~ -20	F	-1.2
-20 ~ 0	F	-1.1
0 ~ 20	F	-1
20 ~ 40	F	-0.8
40 ~ 60	F	-0.6
60 ~ 80	F	-0.3
-40 ~ -20	g	-1
-20 ~ 0	g	-0.9
0 ~ 20	g	-0.7
20 ~ 40	g	-0.4
40 ~ 60	g	-0.2
60 ~ 80	g	0.1
-40 ~ -20		6
20 ~ 40		6.3
60 ~ 80		6.5