E-FL5 - Hoya

Diagram n (λ)

n calculation

Diagram τ (λ)

τ calculation

Analogue search

Main parameters
n_d = 1.581439 n_e = 1.584812	V_d = 40.89 V_e = 40.61	n_F - n_C = 0.014219 n_F' - n_C' = 0.014400	Coloring: 0.35 - 0.38 mkm.

Type: Schott
Spectral range: 0.36501 - 1.014 mkm.
C1 = 2.4465754 C2 = -0.010107041 C3 = 0.017759132 C4 = 0.00087970259 C5 = -0.000057014929 C6 = 0.0000060924663

Refraction index
n _2.3254	-----
n _1.9701	-----
n _1.5296	-----
n _1.06	-----
n _t	1.566601
n _s	1.570107
n _r	1.574889
n _C	1.577232
n _C'	1.577894
n _0.6328	1.578516
n _D	1.581315
n _d	1.581439
n _e	1.584812
n _F	1.591451
n _F'	1.592294
n _g	1.599653
n _h	1.606758
n _i	1.619661
n _0.3341	-----
n _0.3126	-----
n _0.2967	-----
n _0.2804	-----
n _0.2483	-----

Relative partial dispertion
P_C,t	0.7475
P_C,A'	0.3272
P_d,C	0.2958
P_e,C	0.5330
P_g,d	1.2808
P_g,F	0.5767
P_h,g	0.4996
P_i,g	1.4071
P_C',t	0.7941
P_e,C'	0.4864
P_F',e	0.5262
P_i,F'	1.9246

transmittance: 5 mm
τ_1.55	0.997
τ_1.5	0.997
τ_1.4	0.996
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.999
τ_1.06	0.999
τ_1.05	0.999
τ₁	0.999
τ_0.95	0.999
τ_0.9	0.999
τ_0.85	0.999
τ_0.83	0.999
τ_0.8	0.999
τ_0.78	0.999
τ_0.75	0.999
τ_0.7	0.999
τ_0.65	0.999
τ_0.6	0.999
τ_0.55	0.999
τ_0.5	0.997
τ_0.48	0.996
τ_0.46	0.996
τ_0.44	0.994
τ_0.42	0.992
τ_0.4	0.984
τ_0.39	0.97
τ_0.38	0.934
τ_0.37	0.83
τ_0.36	0.58
τ_0.35	0.18

transmittance: 10 mm
τ_1.55	0.993
τ_1.5	0.994
τ_1.4	0.993
τ_1.3	0.999
τ_1.2	0.999
τ_1.1	0.998
τ_1.06	0.998
τ_1.05	0.998
τ₁	0.999
τ_0.95	0.998
τ_0.9	0.998
τ_0.85	0.998
τ_0.83	0.998
τ_0.8	0.998
τ_0.78	0.998
τ_0.75	0.998
τ_0.7	0.998
τ_0.65	0.998
τ_0.6	0.998
τ_0.55	0.998
τ_0.5	0.995
τ_0.48	0.993
τ_0.46	0.992
τ_0.44	0.988
τ_0.42	0.985
τ_0.4	0.969
τ_0.39	0.942
τ_0.38	0.873
τ_0.37	0.7
τ_0.36	0.34
τ_0.35	0.03

Poisson coef.: 0.229
Rigidity: 308 Pa*10⁸
Young module: 757 Pa*10⁸
Knoop hardness: 550
Abrasion: 110

Staining: 1
Resistance to acids: 1

Temperature coefficient of linear expansion
Temp. range, C	Value, 1/C*10^-7
-30 ~ 70	79
100 ~ 300	98

Temperature coefs. of n_abs
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		0.3
-20 ~ 0		0.9
0 ~ 20		1.4
20 ~ 40		1.7
40 ~ 60		1.9
60 ~ 80		2

Temperature coefs. of n_rel
Temp. range, C	Wave length, mkm.	Value, 1/C*10^-6
-40 ~ -20		2.5
-20 ~ 0		2.8
0 ~ 20		2.9
20 ~ 40		3
40 ~ 60		3.1
60 ~ 80		3.1